US3276647A - Register control system for a moving web - Google Patents

Register control system for a moving web Download PDF

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Publication number
US3276647A
US3276647A US356234A US35623464A US3276647A US 3276647 A US3276647 A US 3276647A US 356234 A US356234 A US 356234A US 35623464 A US35623464 A US 35623464A US 3276647 A US3276647 A US 3276647A
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Prior art keywords
error
web
counter
motor
correction
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US356234A
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English (en)
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Jr Clarence A Lewis
James F O'brien
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CHAMPLAIN CO Inc
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CHAMPLAIN CO Inc
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Priority to US356234A priority Critical patent/US3276647A/en
Priority to GB11247/65A priority patent/GB1034994A/en
Priority to CH438165A priority patent/CH422828A/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/1882—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]
    • Y10T83/148—Including means to correct the sensed operation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]
    • Y10T83/159—Including means to compensate tool speed for work-feed variations

Definitions

  • This invention relates to register control systems for repeat operations on a moving web.
  • the primary object of the invention is to generally improve such register control systems, and to provide a relatively simple and inexpensive system using solidstate circuitry, for position register.
  • the system includes a compact sampling circuit utilizing solid-state components, and preferably having a selector switch whereby operation of the correction motor may be permitted for each repeat length, or every second repeat length, or every fourth repeat length, and so on, up to say every sixteenth repeat length.
  • the web may be unwound from the roll by means of feed units having metering rolls of fixed diameter driven by a main shaft.
  • the web then may go to a print cylinder, or a rotary knife, or a rotary die, the diameter of which depends on the particular repeat length to be handled.
  • the latter cylinder is driven in onefor-one relation to the repeat length.
  • This requires a driven of variable ratio as between the metering rolls and the cylinder, and for this purpose the drive may include a positive infinitely variable drive unit.
  • a preprinted roll may have a repeat length which varies slightly from the beginning to the end of a particular roll, or which may vary from one roll to another. This will cause errors which repeat successively in one direction, instead of being random.
  • an error trend is recognized by simplified solid state circuitry, and a second correction motor is provided which responds to such a trend by slightly varying the drive ratio in proper direction to reverse the trend.
  • the drive ratio is adjusted until there are about the same number of lagging and leading errors, or in other words, until the errors are random instead of trending heavily in one direction.
  • the circuitry may include a selector switch which varies the trend requirement, that is, the proportion of like error pulses, say, four out of six, needed to signify the existence of a trend sufficient for the second correction motor to take corrective action by changing the actual drive ratio. This is in contradistinction to the register position correction which is taken care of by the first correction motor.
  • FIG. 1 is a schematic diagram for apparatus embodying features of the invention
  • FIG. 2 is explanatory of a phase micrometer used in FIG. 1;
  • FIG. 3 is a time diagram showing the relation of a scanner pulse to adjacent gate pulses
  • FIG. 4 is an electrical block diagram showing the circuitry used in the system.
  • FIG. 5 shows a modification of the apparatus shown in FIG. 1.
  • a preprinted web 32 is drawn from a web roll 34 by means of pull roll 36 cooperating with a pressure roller 38.
  • Pull roll 36 is driven by a main shaft 40 which also drives a rotary cylinder 42, which may be a print cylinder or a rotary knife or a die.
  • a rotary cylinder 42 which may be a print cylinder or a rotary knife or a die.
  • the drive ratio to cylinder 42 must be variable.
  • the drive is through a positive infinitely variable drive 44 having a wide output range, say two-toone.
  • This drives a shaft 46 which drives cylinder shaft 48 through a running register 50 of the planetary or differential gear type.
  • the position register of the cylinder 42 may be adjusted by means of a correction motor 52 controlled by circuitry in a correction computer 54.
  • the web 32 is scanned by a photoelectric eye or photodiode scanner 56 to produce target pulses which may be compared with pulses obtained from a phase micrometer 58 which is driven in one-to-one ratio with the rotary cylinder 42.
  • phase indicating devices as 58 are known and need not be described in full detail.
  • FIG. 2 Its general nature will be seen in FIG. 2, it comprising a disc or cup 60 rotated by shaft 62 and having a pair of displaced slots 64 and 66. These are illuminated by stationary lamps 68 and 70, the illumination from which is received by photodiodes 72 and 74.
  • the slots 64 and 66 may be say 10 of arc in length for a long repeat length, say 18 to 36 inches, and they are angularly displaced to provide a dead zone therebetween.
  • the web scanner is also a known device, and needs no detailed description. It comprises a lamp, a photodiode, optics, and an amplifier, the latter preferably being transistorized.
  • a web pulse shown at 80 in FIG. 3 comes between leading and lagging pulses or gates shown at 82 and 84. If the web pulse 80 occurs during either the lead pulse or the lag pulse, an out-of-register condition exists, and the correction computer 54 (FIG. 1) energizes the correction motor 52 in proper direction to move the web pulse back into the dead zone, thereby reestablishing the desired register. With the present system the dead zone may be reduced to a very small value, if desired, down to say five thousandths of an inch and even less of web.
  • the P.I.V. drive 44 may have its drive ratio varied by means of a second correction motor Q0 which is also controlled by part of the circuitry at block 54.
  • the circuitry includes means to sense a trend of corrections, and if the trend is definitely in one direction or the other, the ratio of the drive 44 maybe slightly varied in proper direction to reverse the trend.
  • the electrical circuitry may be described with reference to FIG. 4 of the drawing, referring to which the phase micrometer 58 produces the lead gate pulse and lag gate pulse shown at 82 and 84 in FIG. 3.
  • the web scanner 56 produces the pulse in FIG. 3) which represents the position of the web target with respect to the phase micrometer. If the web pulse occurs between the lead and lag pulse, as shown in FIG. 3, register is assumed to be acceptable. If however, the web pulse occurs simultaneously with either the lead or lag pulse, a correction increment is introduced to the web by means of the reversible motor 52.
  • This is preferably a two phase motor of the Slo-Syn permanent magnet type.
  • the two field windings for the two phases are indicated in FIG. 4 at 132 and 134.
  • the correction increment is of short time duration, say one tenth of a second.
  • the web pulse from scanner 56 goes through a block 4 representing a light increase, light decrease switch which is set in proper position, that is, if the background is dark and the web target is light, the switch is set in the light increase position. Conversely, if the background is light, and the target is dark, the switch is set in the light decrease position.
  • the pulse is then amplified in amplifier 5 and then goes to a sensitivity switch in block 6.
  • a sensitivity switch in block 6. This is normally set in sensitive position, for response to a small contrast at the target on the web, but when first setting up the apparatus to handle a new printed web, the switch may be put in a desensitized position so that background variations will not affect the system.
  • the pulse is sharpened and conditioned in a Schmidt trigger circuit ST3, and then moves through AND gate 25, the output of which is supplied to AND gates 7 and 8.
  • the leading and lagging gate pulses from phase micrometer 58 are supplied to Schmidt trigger circuits ST1 and ST2 which provide gate pulses which are sharp and which are constant in amplitude. These are combined at the AND gates 7 and 8 with the conditioned web target pulse.
  • the circuitry centering beneath the five-pole switch S1 constitutes an electronic sampler circuit which is not described now but is described later.
  • the switch S1 is assumed to be in its leftmost position, in which case there is no sampling, that is, a target pulse from scanner 56 is received and used for every repeat length, as though there were no sampling circuit.
  • AND gate 25 then has through wire 150 a DC. level which acts as one input such that the AND gate 25 is receptive to all pulses received from scanner 56.
  • the actual power supply detail is not shown because FIG. 4 is a conventional block diagram, and the details for the blocks shown may be conventional.
  • ANDgate 25 appears at either AND gate 7 or 8, and combines with either the lead or lag gate pulse to actuate a one shot mono-stable multivibrator in block 9 or block 10, respectively.
  • the web pulse appears with either the lead or lag gate pulse, and actuates the appropriate one-shot multi-vibrator whose output appears at either gate -11 or gate 12.
  • the other input to AND gates 11 and 12 is a double frequency pulse from an oscillator 13.
  • double frequency pulses will appear at the output of either gate 11 or gate 12.
  • the frequency from the frequency doubling source 13 is 120 cycles per second.
  • the reversing action provided for motor 52 may be explained with reference to the upper part of FIG. 4, by first assuming that the silicon-controlled rectifiers SCR1 and SCR2 are replaced by a single-pole switch, and similarly that SCR3 and SCR4 arereplaced by a singlepole switch. If the upper switch were closed, the field winding 132 would be energized through conductor 140 directly from the 110 v. source, and the other winding 134 would be energized through a phase shifting capacitor 136. The motor then would rotate in one direction. If instead the switch corresponding to SCR3 and SCR4 were closed, the field winding 134 would be energized through conductor 142 directly from the 110 v. source, and the other field winding 132 would be energized through phase shifting capacitor 136. The motor then would rotate in reverse direction.
  • the error is on or off, and the correction motor 52 turns on or off. If a pulse occurs in I to supply the trigger pulses.
  • the dead zone there is no correction. If a pulse occurs in the lead gate or in the lag gate, there is an appropriate correction through the silicon-controlled rectifiers.
  • Two are needed because the motor is energized by both positive and negative halfwaves.
  • the pair may be called an SCR switch for A.C.
  • the other two are needed to supply the motor for reverse operation.
  • each switch comprises two oppositely faced silicon-controlled rectifiers, each transformer has two secondaries.
  • the control electrodes of the silicon-controlled rectifiers are pulsed from the double frequency source 13, through either transformer T1 or T2.
  • the duration of this series of pulses is set by the time delay of the one shot multi-vibrators 9 and 10. The direction of rotation depends on which transformer receives the c.p.s. pulses.
  • a circuit which is controlled by a selector switch and which results in sampling once for every sheet, or once for every second sheet, for every fourth sheet, for every eighth sheet, or for one in sixteen sheets.
  • the electronic sampler provides stability despite the system lag, that is, despite the fact that a correction may be almost instantaneously introduced to the web, and yet the result of the correction not be apparent at the scanner until some time later when the equilibrium conditions are established.
  • the sampling circuit affords time for the correction to be absorbed or recognized.
  • the sampler functions as follows.
  • Flip-flop stages FFl, FF2, FF3, and FF4 are bi-stable elements connected to act as a binary counter which counts to sixteen. It is not desirable to directly sample the web scanner pulses because before the action of the gate there may be many excess or false pulses from the scanner caused by the overall printing on the web, and it is only after the gate action of the phase micrometer 58 that the true target pulse is selected from all the other pulses. For this reason, the sampling counter now described is applied to a gate pulse rather than a scanner pulse.
  • the lead gate is used because it precedes the target pulse, and, subject to the sampler action, makes AND gate 25 receptive to the target pulse for the selected sampling interval.
  • the rotary switch S1 in this instance is a five-pole switch. Disregarding the lower pole 152, the four upper poles are related to the four flip-flop circuits shown directly therebelow. In the first or leftmost position of the switch all four flop-flop stages are inhibited and do'not function. This is so because the left side of each flip-flop stage is grounded as shown at 154, to prevent the flipflop from functioning. Gate 14 thus receives all four inputs on the four conductors shown leading into gate '14, and therefore delivers a continuous output to conductor 150, which in turn is an input to gate 25, as previously explained, making it receptive to all scanner pulses.
  • flip-flops FF2, FF3, and PM. are grounded at 154 as previously described, and thereby made inoperative.
  • flipflop FFI is made operative since its output is not grounded, the contacts at the left switch pole being open in all positions except the first. Thus, it will produce an output for every second lead gate pulse, and the AND gate 25 is made receptive through conductor 150 for only every second repeat length.
  • the flip-flops FPS and FF4 are grounded at 154, and the flip-flops FF1 and FFZ are effective, thus delivering an output for every fourth gate pulse, with the result of sampling for every fourth repeat length.
  • the flip-flops FF1 and FFZ are effective, thus delivering an output for every fourth gate pulse, with the result of sampling for every fourth repeat length.
  • the flip-flop circuit in the fourth position, only the last flip-flop circuit is grounded, and the circuit is active for only every eighth repeat length; and in the fifth position the circuit is active for every sixteenth repeat length, none of the flip-flop circuits then being grounded.
  • the sampling procedure compensates for the lag caused by the length of web between successive pairs of feed rolls, which in some cases may be substantial, and this compensation also contributes to stability.
  • the optimum setting is such that the lag introduced by the sampler is equivalent to the lag that is inherent to the operation of the system, and usually is proportional to the length of web between the successive pairs of feed rollers involved.
  • THE TREND CIRCUIT A problem arises when unreeling and cutting a previous ly printed web. This may have an error which varies from the outside of the roll toward the inside of the roll. For example, the outside may become damp and the repeat length is different from inside where it is dry.
  • the present system includes a circuit which recognizes a trend. If say four out of five measurements call for advance, then a correcting motor is used to neutralize the trend, and finally a condition is reached where the error floats back and forth around zero.
  • the trend computer usually is utilized only when preprinted web is being converted, but it can be used at any time, for example to correct undesired drift in a PIN. drive.
  • a method of compensating for repeat length variation in a preprinted roll is most advantageous because repeat lengths vary considerably from roll to roll of stock, or from the beginning to the end of a particular roll of stock.
  • the present circuit shown in the lower right of the diagram, monitors in groups the number of advance or retard corrections derived from the computer, and appropriate corrections of the P.I.V. drive ratio are made through a second correction motor 90 in such a manner as to reestablish a more nearly equal or random distribution of advance and retard corrections.
  • the motor 90 again is preferably a Slo-Syn two-phase motor supplied from a single-phase source, and controlled by silicon-controlled rectifier switches and a double frequency pulse supplied through pulse transformers T3 and T4.
  • the double frequency is supplied from source 160.
  • the circuit may include a two-pole switch S2 which varies the trend requirement, that is, the number of like error pulses in groups of pulses, needed to signify the existence of a trend sufficient to take corrective action.
  • the present trend circuit has the advantage of being non-recursive, that is, it responds to error pulses in predetermined groups, and recycles at the end of each group in order to begin response anew to error pulses in the next group, thus discarding What may have been random errors in all preceding groups. For example, if the recycle group is selected to be six repeat lengths, a trend is established at four out of siX repeat lengths.
  • the specified requirement may be varied, and in the present circuit this is done by varying the size of the group.
  • the present circuit provides for a correction response to four out of four, four out of five, four out of six, or four out of seven repeat lengths.
  • this uses a binary counter with three stages, but by adding another stage the group may be lengthened to sixteen, and so forth.
  • Other counters total the number of advance and retard pulses, and in the present case the said counters have two stages for a count to four, but obviously could have additional stages.
  • the flip-flop circuits FFS, FF6, and FF7 are bi-stable elements connected to operate as a counter for the group, to a total of eight, and through switch S2, indicated connections can be made to AND gate 16 and through another gate 17, such that the counter is reset or recycled every five, six, seven or eight repeat lengths or signals derived from the electronic sampler.
  • these three stages consist of a recycling counter, the recycling number of repeat lengths being determined by the setting of switch S2
  • a sampling circuit is employed, the mention above of repeat length really refers to the utilized samples. If the sampler is set to utilize only each fourth repeat length, a group of five referred to above would be five samples, or twenty repeat lengths; a group of six would be six samples or twenty-four repeat lengths; and so on.
  • the effective repeat length or sample manifests itself through conductor 162 which extends from the sampler to the group counter. Assume switch S2 is in the leftmost or first position, which corresponds to a group of five, as marked. Starting from zero, the counter will count until its contents equal five, at which time the output of flipflop FF7 combines with the output of flip-flop FFS at the input to AND gate 16. The output of gate 16 through gate 17 recycles the counter to zero through conductor 164. This operation is repeated for every five samples.
  • the counter for the advance signals comprises the bi-stable elements or flip-flops FF8 and FF9, and the counter for the retar signals comprises the bi-stable elements or flip-flops FF10 and FF11. These are reset when the main group counter is recycled through its conductor 164. Their reset also is from the gates 16 and 17, but is through conductor 166.
  • an output pulse is provided from flip-flop FF9, through AND gate 19, and activates a one-shot circuit 21, which establishes the length of each corrective operation of the motor 90, say a tenth of a second.
  • the output of one-shot circuit 21 combines With the double frequency circuit 160 at AND gate 23, thereby app-lying the double frequency to pulse transformer T3, and in effect closing the AC. switch comprising the siliconcontrolled rectifiers SCRS and SCR6, as previously explained for position correction motor 52.
  • motor again is a two-phase motor operated from a single-phase supply, with either winding energized directly, and the other energized through a phase shifting capacitor, as was described for motor 52.
  • the reversing control of motor 90 is through two pairs of oppositely polarized silicon-controlled rectifiers, the control electrodes of which are coupled through pulse transformers T3 and T4, each having two secondaries, all as was described for motor 52.
  • motor 90 varies the drive ratio of the P.I.V. drive. Motor 90 rotates in proper direction to reduce the error trend.
  • the group counter With the selector switch S2 set in the position marked 5, the group counter will recycle every fifth repeat length or sample. Four consecutive advance or retard error signals are needed to produce an output. Since an advance or retard error signal pulse follows (in time) the gate signal which goes to the group counter, it is possible to have a count of one in the error counter when the group counter reads zero. It follows or is later in time because the group count is taken from the leading edge of the lead gate, and therefore is necessarily ahead of the web scanner pulse.
  • the error counters Because the error counters have only two binary stages, they automatically recycle to zero on a count of four. If the next signal is an error in the same direction, the counter has a count of one and is then reset when the group is recycled. If the error count on the counter FF8, FF9, (or on counter FF10, FFll) is only one, it is reset through conductor 166, as previously described.
  • a delay circuit 18 is provided in a conductor 168 leading from AND gate 16 to inhibited AND gates 19 and 20. This would not affect the operation previously described, but now becomes significant. With flip-flops FPS and FF9 containing a count of two or three, flip-flop FF9 would emit a pulse when it is reset by the counter through conductor 166. This pulse would produce an erroneous signal, which in turn would operate the correction motor.
  • the reset pulse from the group counter (between gates 16 :and 17) is delayed so that AND gates 19 and 20 are inhibited by their connection to the group counter through conductor 168 before the error counter is reset through conductor 166.
  • the time delay of this circuit is in the order of magnitude of one microsecond, and therefore does not aifect the normal operation previously described.
  • the gates 19 and 20 are inhibited AND gates, and pass an output from either error counter in the absence of a signal on conductor 168. With a signal on conductor 168, the gates are inhibited and block the output.
  • an inhibit pulse occurs at gates .19 and 20.
  • an output of gate 16 appears at the delay circuit 18. Because of the delay, this pulse prevents the gates 19 and 20 from passing a pulse from flip-flops FF9 or FFll when they are reset.
  • Gates 19 and 20 are normally inhibited; they conduct when there is a signal on line 168; but in the present case that signal is delayed and therefore gates 19 and 20 do not conduct.
  • the group has been assumed to be five. If the switch S2 is moved to the second position, the group length is six. The operation then is substantially the same as previously described, except that the recycling of the group counter does not take place until a count of six, and the corresponding reset signal through conductor 166 to reset the error counters is also applied at a group count of six. There must now be four error pulses out of five, instead of four out of four, the last or sixth pulse in the group acting to recycle the group.
  • the group length is seven, that is, the group is recycled on a count of seven, and a correction is initiated if the error count is four in six.
  • the group length is eight, and the group counter recycles on a count of eight, while correction at motor is initiated if the error count reaches four out of seven.
  • this system calls for four like error pulses out of four samples (when the group is five), four out of five (when the group is six), four out of six (when the group is seven), and four out of seven (when the group is eight).
  • the purpose of the fifth pole 1 52 of the sample selection switch S1 is as follows: when set in position -1, the group counter counts the lead gate pulses directly from Schmidt trigger 1, by way of conductor 17 0 and conductor 162. In all other positions of switch S1, the group counter counts the sampled gate signals. These derive from the AND gate 14 to switch pole 152 and thence through conductor 162 to the trend circuit.
  • ALTERNATE MECHANISM Modifications of the mechanism shown in FIG. 1 may be made, and one such modification is shown in FIG. 5.
  • the web 232 is drawn from a roll 234 by means of feed rolls 236 and 238.
  • a main difference is that position registration is obtained by means of a movable compensator roller 250, instead of by means of a running register.
  • the position of compensator roller 250 is adjusted by means of a correction motor 252 driving a screw 253.
  • the second operation on the web is performed by means of a rotary knife or other cylinder 2-42 driven by a shaft 248, and again there a phase micrometer 258 which turns in one-to-one ratio with cylinder 242.
  • the web is scanned by a scanner 256, and a computer 254 controls both the position correction motor 252, and the ratio correction motor 290.
  • the speed of shaft 240 in relation to the speed of shaft 246 must be varied because the feed roll 236 is constant in diameter, whereas the operating roll or die 242 turns in one-to-one ratio with the repeat length of the printing on the web. This difference is obtained through a positive infinitely variable drive 44, and it is the drive ratio of this that is varied by correction motor 290.
  • FIG. 5 Another difference illustrated in FIG. 5 is that the main drive is here applied to shaft 246 instead of shaft 240, that is, to the operating cylinder 242 instead of the metering roll 236.
  • a punch press of the known reciprocating type for scoring, cutting, creasing, or the like.
  • Such a punch press operates on an intermittently moved web, but the web is first drawn at uniform velocity by feed rolls such as the rolls 36, 3'8 acting as metering rolls. Moreover, the web may be coming from a printing press instead of a roll.
  • the punch press reciprocates once for each repeat length, and therefore substantial changes in drive ratio may be needed, and are provided by means of the drive 44 in FIG. 1 between the shaft 40 which drives the metering feed roll, and shaft 46 which in such case drives the punch press instead of the rotary device 42.
  • the scanner 56 again is located close to the punch press, and the phase micrometer 58 is mounted on a one-to-one drive shaft of the punch press.
  • intermittently rotatable feed rolls at the punch press accelerate and decelerate the web, and a slack loop is provided between the continuous feed roll 36 shown in FIG..1, and the intermittently driven feed rolls (not shown) located at and forming a part of the punch press.
  • the roll 42 (or roll 242 in FIG. 5) having a peripheral length equal to the repeat length of the print on the web may be an embossing roll, or a print roll adding printed matter to a preprinted web.
  • the diameter would not matter, since it does not run in tight web engagement, and there would be no need to change the cylinder diameter for a change in repeat length, but the invention applies exactly as described above because the knife must be turned in one-to-one ratio with the repeat length.
  • the repeat length to be handled may be varied over a wide ratio if the drive 44 is correspondingly variable over a wide ratio.
  • a changegear box may be provided in addition to the infinitely variable drive 44.
  • the variable drive may be a PIV drive made by Link Belt Co. or a Reeves drive, or a Graham drive, but the latter is variable over only a small range and therefore usually would 'be combined with a change gear box in order to provide a wide range of variation.
  • the circuitry and components are usable for small or large correction motors because of the great range of a silicon-controlled rectifier.
  • the same rectifiers can be used for motors ranging from to nearly a horsepower, assuming SCR units which handle 6 amperes at 110 volts, which is a commercially available and inexpensive commercial size.
  • a register control system for a moving web comprising a web scanner to detect an error in registration, a two-phase correction motor, a capacitor connected to the two field windings of the motor for shifting the phase of one field winding relative to the other, a single-phase A.C. supply for said motor, a pair of opposed silicon-controlled rectifiers connecting the A.C. supply to one field winding of the motor, a second pair of opposed silicon-controlled rectifiers connecting the A.C.
  • a register control system for a moving web comprising a web scanner to detect an error in registration, a twophase Slo-Syn type correction motor, a capacitor connected to the two field windings of the motor for shifting the phase of one field winding relative to the other, a single-phase A.C. supply for said motor, a pair of opposed silicon-controlled rectifiers connecting the A.C. supply to one field winding of the motor, a second pair of opposed silicon-controlled rectifiers connecting the A.C.
  • a double frequency supply source to synchronously pulse one pair or the other pair of silicon-controlled rectifiers to make them conductive
  • a monostable multivibrator unit disposed in said circuitry to limit each operation of the correction motor to a desired brief interval, in the order of a fraction of a second.
  • a register control system for a moving web comprising a web scanner to detect an error in registration, a reversible correction motor, means responsive to scanner pulses to operate the correction motor in that direction which reduces an error, and sampling circuitry including a series of bistable elements connected to make up a counter system and receiving pulses one for one with the aforesaid scanner pulses, means responsive to an output derived from the counter system for preventing operation of the correction motor, and a selector means to select desired derived counter system outputs, whereby the correction circuitry is made active at correction intervals greater than the repeat interval, the said correction intervals being deemed by the said selector means.
  • a register control system for a moving web comprising a web scanner to detect an error in registration, means to provide a gate pulse to select a web target pulse for each repeat length, a reversible correction motor, means responsive to said pulses to operate the correction motor in that direction which reduces an error, and sampling circuitry including a series of bi-stable elements connected to make up a binary counter and receiving said gate pulses, and means responsive to an output derived from the counter for preventing operation of the correction motor, whereby the correction circuitry is made active at intervals greater than the repeat interval.
  • a register control system for a moving web comprising a'web scanner to detect an error in registration, means to provide a gate pulse to select a web target pulse for each repeat length, a reversible correction motor, means responsive to said pulses to operate .the correction motor in that direction which reduces an error, and sampling circuitry including a series of bi-stable elements connected to make up a binary counter and receiving said gate pulses, means responsive to an output derived from the counter for preventing operation of the correction motor, and a selector switch to select desired derived counter outputs, whereby the correction circuitry is made by said selector switch to be active for every repeat length, or every second repeat lenth, or every fourth repeat length, and so on, depending on the position of the selector switch.
  • a register control system for a moving web comprising a web scanner to detect an error in registration, a reversible correction motor, means responsive to scanner pulses to-operate :the correction motor in that direction which reduces an error, and sampling circuitry including a series of bi-stable elements. connected to make up a counter system and receiving pulses one for one with the aforesaid scanner target pulses, means which is made receptive to the scanner pulses by an output derived from the counter system, and selector means to select desired derived counter system outputs, whereby the correction circuitry is made active at intervals greater than the repeat interval.
  • a register control system for a moving web comprising a web scanner to detect an error in registration, means to provide a gate pulse to select a web target pulse for each repeat length, a reversible correction motor, means responsive to said pulses to operate the correction motor in that direction which reduces an error, and sampling circuitry including a series of bi-stable elements connected to make up a counter system and receiving pulses one for one with the aforesaid scanner target pulses, and means which is made receptive to the scanner pulses by an output derived from the counter system whereby the correction circuitry is made active at intervals which are a multiple of the repeat interval.
  • a register control system for a moving web comprising a web scanner to detect an error in registration, means to provide a gate pulse to select a web target pulse for each repeat length, a reversible correction motor, means responsive to said pulses to operate the correction motor in that direction which reduces an error, and sampling circuitry including a series of bi-stable elements connected to make up a counter system and receiving pulses one for one with the aforesaid scanner target pulses, means which is made receptive to the scanner pulses by an output derived from the counter system, and selector means to select desired derived counter systern outputs, whereby the correction circuitry is made active at intervals which are a multiple of the repeat interval.
  • a register control system for a moving web comprising a web scanner to detect an error in registration, means to provide a gate pulse to select a web target pulse for each repeat length, a reversible correction motor, means responsive to said pulses to operate the correction motor in that direction which resduces an error, and sampling circuitry including a series of tbi-stable elements connected to make up a counter system and receiving said gate pulses, and an AND gate which is made receptive to the scanner pulses by an output derived from the counter system, whereby the correction circuitry is made active at intervals which are a mutilple of the repeat interval.
  • a register control system for a moving web comprising a web scanner to detect an error in registration, means to provide a gate pulse to select a web target pulse for each repeat length, a reversible correction motor, means responsive to said pulses to operate the correction motor in that direction which reduces an error, and sampling circuitry including a series of .bi-st-able elements connected to make up a binary counter and receiving said gatepulses, an AND gate which is made receptive to the scanner pulses by an output derived from the counter, and a selector switch to select desired counter outputs, whereby the correction circuitry is made by said selector switch to be active every repeat length, or every second repeat length, or every fourth repeat length, and so on, depending on the position of the selector switch.
  • a register control system for a moving web acted on by two spaced mechansim-s one of which has a feed roller of constant diameter regardless of repeat length on the web, and the other of which is driven in one-to-one relation with the repeat length, said system comprising rotating drive means connecting said mechanisms and including a positive infinitely variable drive device having a reversible correction motor for changing its drive ratio, a web scanner to detect an error in registration, and a trend-counteracting circuitry for controlling said reversible correction motor, said circuitry including a group counter for receiving repeat length pulses, an advance error counter for receiving advance error pulses, a retard error counter for receiving retard error pulses, said group counter having a group count higher than that of the error counters, means responsive to a desired total on the advance error counter for driving the correction motor to change the drive ratio in that direction which reduces the error, means responsive to the retard error counter to drive the correction motor in opposite direction, means to recycle the group counter on reaching a desired group count, and means to reset the error counters when the group counter
  • a register control system for a moving web acted on by two spaced mechanisms one of which has a feed roller of constant diameter regardless of repeat length on the web, and the other of which is driven in one-to-one relation with the repeat length said system comprising rotating drive means connecting said mechanisms and including a positive infinitely variable drive device having a reversible correction motor for changing its drive ratio, a position register means between said mechanisms, a reversible correction motor for said position register means, a web scanner to detect an error in registration, means to provide a gate pulse to select a web target pulse for each repeat length, and trend-counteracting circuitry for controlling said reversible ratio correction motor, said circuitry including a group counter for receiving gate pulses, an advance error counter for receiving advance error pulses, a retard error counter for receiving retard error pulses, said group counter having a group count higher than that of the error counters, means responsive to a desired total on the advance error counter for driving the ratio correction motor to change the drive ratio in that direction which reduces the error, means responsive to the retard error
  • a register control system for a moving web acted on by two spaced mechanisms one of which has a feed roller of constant diameter regardless of repeat length on the web, and the other of which is driven in one-toone relation with the repeat length said system comprising rotating drive means connecting said mechanisms and including a positive infinitely variable drive device having a reversible correction motor for changing its drive ratio, a web scanner to detect an error in registration, and trend-counteracting circuitry for controlling said reversible ratio correction motor, said circuitry including a group counter made up of bi-stable elements for receiving repeat length pulses, an advance error counter made up of bi-stable elements for receiving advance error pulses, a retard'error counter made up of bi-stable elements for receiving retard error pulses, said group counter having at least one bi-stable element more than said error counters -to provide a group count higher than that of the error counters, means responsive to a desired total on the advance error counter for driving the correction motor to change the drive ratio in that direction which reduces the error, means responsive to the retard error
  • a register control system for a moving web acted on by two spaced mechanisms one of which has a feed roller of constant diameter regardless of repeat length on the web, and the other of which is driven in one-toone relation with the repeat length said system comprising rotating drive means connecting said mechanisms and including a positive infinitely variable drive device having a reversible correction motor for changing its drive ratio, a web scanner to detect an error in registration, means to provide a gate pulse to select a web target pulse for each repeat length, and trend-counteracting circuitry for controlling said reversible ratio correction motor, said circuitry including a group counter made up of bi-sta ble elements for receiving gate pulses, an advance error counter made up of bi-stable elements for receiving advance error pulses, a retard error counter made up of bi-stable elements for receiving retard error pulses, said group counter having at least one bi-stable element more than said error counters to provide a group count higher than that of the error counters, means responsive to a desired total on the advance error counter for driving the correction motor to change the drive

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Advancing Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
US356234A 1964-03-31 1964-03-31 Register control system for a moving web Expired - Lifetime US3276647A (en)

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US356234A US3276647A (en) 1964-03-31 1964-03-31 Register control system for a moving web
GB11247/65A GB1034994A (en) 1964-03-31 1965-03-17 Improvements in or relating to register control systems for moving webs
CH438165A CH422828A (fr) 1964-03-31 1965-03-29 Dispositif de contrôle de repérage sur une bande en mouvement

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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397634A (en) * 1965-09-13 1968-08-20 Kansas City Star Company Registration control system for preprinted web insertion
US3468201A (en) * 1967-03-09 1969-09-23 Hurletron Inc Digitalized print-to-cutoff register system
US3490322A (en) * 1967-03-16 1970-01-20 Roman Romes Cutting machine and control mechanism therefor
US3604300A (en) * 1969-06-24 1971-09-14 Cutler Hammer Inc Frequency base knife control systems
DE2151264A1 (de) * 1970-10-15 1972-04-20 Harris Intertype Corp Steueranlage fuer achsensenkrechte und seitliche Papierbahnausrichtung
US3668957A (en) * 1969-08-08 1972-06-13 Koppers Co Inc Sheet length control system
US3841216A (en) * 1972-12-07 1974-10-15 Hamilton Tool Co Method of and apparatus for correcting deviations in length and registration in a continuous strip of material
USRE28602E (en) * 1972-02-16 1975-11-04 Differential drive for tension rollers
JPS5590674A (en) * 1978-12-22 1980-07-09 Gd Spa Apparatus for carrying out supplying and controlling continuous web as well as cutting same into unit portion
US4238064A (en) * 1978-07-24 1980-12-09 Ppg Industries, Inc. System for actuating glass ribbon, cross scoring and snapping equipment
WO1982001501A1 (fr) * 1980-11-05 1982-05-13 Donald R Foote Commande d'enregistrement
US4415978A (en) * 1981-04-14 1983-11-15 Molins Machine Company, Inc. Cut-to-mark cut-off control automated for splice and order change
US4482972A (en) * 1981-06-25 1984-11-13 Lewis Clarence A Distance sensing apparatus and method
US4516736A (en) * 1982-11-08 1985-05-14 Allegheny Ludlum Steel Corporation Method and apparatus for slitting metal strip
WO1986002623A1 (fr) * 1984-11-01 1986-05-09 Doverstar Machinery Ltd. Dispositif de commande pour un appareil de conversion du papier
US4669344A (en) * 1985-04-20 1987-06-02 E.C.H. Will (Gmbh & Co.) Method and apparatus for subdividing webs of coherent paper sheets
US4919049A (en) * 1988-04-13 1990-04-24 Albert-Frankenthal Ag Web feed printing press
EP0409531A3 (en) * 1989-07-17 1991-09-11 Philip Morris Products Inc. On-line embossing apparatus for a labeling machine
US5123316A (en) * 1989-10-26 1992-06-23 Albert-Frankenthal Aktiengesellschaft Method and apparatus for the reduction of paper waste
US5193456A (en) * 1991-12-04 1993-03-16 Crown Cork & Seal Company, Inc. Apparatus for decorating beverage cans using a flexographic process
US5452632A (en) * 1992-10-12 1995-09-26 Heidelberger Druckmaschinen Ag Method for setting the cutting register on a cross-cutting device disposed downline of a web-fed printing press
US5546838A (en) * 1995-04-28 1996-08-20 The Upper Deck Company Notch timing device and method for card slitting machine
US5857392A (en) * 1995-11-06 1999-01-12 Stralfors Ab Cutting device for cutting continuous webs
US6382092B1 (en) * 1997-03-13 2002-05-07 Multi Print Systems B.V. Printing machine with exchangeable ink application means
US20060236878A1 (en) * 2005-04-21 2006-10-26 Toshiba Kikai Kabushiki Kaisha Embossed sheet forming apparatus and rotary phase difference control method
US10239252B2 (en) * 2017-03-30 2019-03-26 Toyota Jidosha Kabushiki Kaisha Tank production system and method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2803737C2 (de) * 1978-01-28 1982-06-09 Gebr. Ditzel Gmbh, 6901 Bammental Verfahren zum rapporthaltigen Aufbringen eines Beschichtungsmaterials auf den Rapportvordruck einer Bahn
US4366753A (en) * 1980-04-11 1983-01-04 Baldwin Korthe Web Controls, Inc. Circumferential registration control system
DD235620A1 (de) * 1985-03-28 1986-05-14 Polygraph Leipzig Verfahren zum erzeugen einer abtastimpulsfolge und abtastregler

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2052255A (en) * 1932-07-21 1936-08-25 Gen Electric Control system
US2230715A (en) * 1940-03-14 1941-02-04 Gen Electric Control system
US3181046A (en) * 1962-07-02 1965-04-27 Ibm Gated pulse amplifier servomechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2052255A (en) * 1932-07-21 1936-08-25 Gen Electric Control system
US2230715A (en) * 1940-03-14 1941-02-04 Gen Electric Control system
US3181046A (en) * 1962-07-02 1965-04-27 Ibm Gated pulse amplifier servomechanism

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397634A (en) * 1965-09-13 1968-08-20 Kansas City Star Company Registration control system for preprinted web insertion
US3468201A (en) * 1967-03-09 1969-09-23 Hurletron Inc Digitalized print-to-cutoff register system
US3490322A (en) * 1967-03-16 1970-01-20 Roman Romes Cutting machine and control mechanism therefor
US3604300A (en) * 1969-06-24 1971-09-14 Cutler Hammer Inc Frequency base knife control systems
US3668957A (en) * 1969-08-08 1972-06-13 Koppers Co Inc Sheet length control system
DE2151264A1 (de) * 1970-10-15 1972-04-20 Harris Intertype Corp Steueranlage fuer achsensenkrechte und seitliche Papierbahnausrichtung
USRE28602E (en) * 1972-02-16 1975-11-04 Differential drive for tension rollers
US3841216A (en) * 1972-12-07 1974-10-15 Hamilton Tool Co Method of and apparatus for correcting deviations in length and registration in a continuous strip of material
US4238064A (en) * 1978-07-24 1980-12-09 Ppg Industries, Inc. System for actuating glass ribbon, cross scoring and snapping equipment
JPS5590674A (en) * 1978-12-22 1980-07-09 Gd Spa Apparatus for carrying out supplying and controlling continuous web as well as cutting same into unit portion
FR2444634A1 (fr) * 1978-12-22 1980-07-18 Gd Spa Dispositif pour faire avancer et pour ajuster un tissu ou papier continu et pour le decouper en portions
US4287797A (en) * 1978-12-22 1981-09-08 G.D. Societa Per Azioni Device for feeding and adjusting a continuous web and for cutting it into portions
WO1982001501A1 (fr) * 1980-11-05 1982-05-13 Donald R Foote Commande d'enregistrement
US4415978A (en) * 1981-04-14 1983-11-15 Molins Machine Company, Inc. Cut-to-mark cut-off control automated for splice and order change
US4482972A (en) * 1981-06-25 1984-11-13 Lewis Clarence A Distance sensing apparatus and method
US4516736A (en) * 1982-11-08 1985-05-14 Allegheny Ludlum Steel Corporation Method and apparatus for slitting metal strip
WO1986002623A1 (fr) * 1984-11-01 1986-05-09 Doverstar Machinery Ltd. Dispositif de commande pour un appareil de conversion du papier
GB2191312A (en) * 1984-11-01 1987-12-09 Doverstar Machinery Ltd Control device for paper converting apparatus
US4669344A (en) * 1985-04-20 1987-06-02 E.C.H. Will (Gmbh & Co.) Method and apparatus for subdividing webs of coherent paper sheets
US4919049A (en) * 1988-04-13 1990-04-24 Albert-Frankenthal Ag Web feed printing press
EP0409531A3 (en) * 1989-07-17 1991-09-11 Philip Morris Products Inc. On-line embossing apparatus for a labeling machine
EP0424874B1 (fr) * 1989-10-26 1995-01-04 Albert-Frankenthal AG Procédé et dispositif pour réduire les déchets dans une machine à imprimer rotative
US5123316A (en) * 1989-10-26 1992-06-23 Albert-Frankenthal Aktiengesellschaft Method and apparatus for the reduction of paper waste
US5193456A (en) * 1991-12-04 1993-03-16 Crown Cork & Seal Company, Inc. Apparatus for decorating beverage cans using a flexographic process
US5452632A (en) * 1992-10-12 1995-09-26 Heidelberger Druckmaschinen Ag Method for setting the cutting register on a cross-cutting device disposed downline of a web-fed printing press
US5546838A (en) * 1995-04-28 1996-08-20 The Upper Deck Company Notch timing device and method for card slitting machine
US5857392A (en) * 1995-11-06 1999-01-12 Stralfors Ab Cutting device for cutting continuous webs
US6382092B1 (en) * 1997-03-13 2002-05-07 Multi Print Systems B.V. Printing machine with exchangeable ink application means
US6668718B2 (en) 1997-03-13 2003-12-30 Multi Print Systems B.V. Printing machine with exchangeable ink application means
US20060236878A1 (en) * 2005-04-21 2006-10-26 Toshiba Kikai Kabushiki Kaisha Embossed sheet forming apparatus and rotary phase difference control method
US7587975B2 (en) * 2005-04-21 2009-09-15 Toshiba Kikai Kabushiki Kaisha Embossed sheet forming apparatus and rotary phase difference control method
US10239252B2 (en) * 2017-03-30 2019-03-26 Toyota Jidosha Kabushiki Kaisha Tank production system and method

Also Published As

Publication number Publication date
CH422828A (fr) 1966-10-31
GB1034994A (en) 1966-07-06

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