US3335662A - Feeding apparatus for printing machines - Google Patents

Feeding apparatus for printing machines Download PDF

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Publication number
US3335662A
US3335662A US475077A US47507765A US3335662A US 3335662 A US3335662 A US 3335662A US 475077 A US475077 A US 475077A US 47507765 A US47507765 A US 47507765A US 3335662 A US3335662 A US 3335662A
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copy sheet
bulge
feeding
photocell
printing machine
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US475077A
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Ritzerfeld Gerhard
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/14—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors by photoelectric feelers or detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L11/00—Apparatus for directly duplicating from hectographic masters in mirror image, i.e. "wet duplicators" for producing positive copies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L39/00—Indicating, counting, warning, control, or safety devices
    • B41L39/04—Tripping devices or stop motions
    • B41L39/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2700/00—Manifolding, printing or duplicating for office purposes
    • B41P2700/10—Hectographic line duplicators

Definitions

  • the present invention relates to feeding apparatus for a printing machine, and more particularly to apparatus for starting a printing operation only when a copy sheet has been placed in the correct feeding position.
  • Another object of the invention is to provide a feeding apparatus which can be used for all kinds of copy sheets.
  • Another object of the invention is to provide a feeding apparatus for starting a printing machine only if a copy sheet is fed in a desired feeding position forming a bulge of predetermined size.
  • Another object of the invention is to provide a feeding apparatus including photoelectric sensing means which respond to blank copy sheets and do not require copy sheets with printed non-reflecting marks thereon.
  • Another object of the invention is to provide a feeding apparatus which starts a printing operation only if a copy sheet has been placed in a feeding position in which its leading edge is located along a line perpendicular to the feeding direction.
  • Another object of the invention is to provide a feeding apparatus of compact construction which is disposed on the printing machine in such a manner as not to interfere with the actions of the operator of the machine.
  • Another object of the invention is to provide a feeding apparatus which automatically indicates when the printing machine has completed a printing operation and is ready to receive the next fed copy sheet.
  • the present invention relates to a feeding apparatus for starting a printing operation only if the copy sheet has been placed by the operator in a correct feeding position forming a bulge of a desired size.
  • the copy sheet is placed on the surface of a supporting table and guided until its leading edge engages the transporting rollers. A slight pressure by the operator forms a bulge in the copy sheet. In order to be properly fed, the bulge must be located a predetermined distance from the surface of the supporting table.
  • a source of light is placed in such a position as to direct a beam of light into the region of the bulge so that a portion of the bulge reflects the light.
  • a photocell is located in the direction in which the light is reflected and is energized only if the copy sheet is in the desired feeding position. The impulse produced by the photocell causes the start of a printing operation of the printing machine, and rotation of the transporting rollers which transport the copy sheet to the printing means of the machine.
  • the source of light and the photocell are mounted on the supporting table located in a plane perpendicular to the supporting surface and parallel to the leading edge of the copy sheet, spaced from the same such a distance that the beam of light emitted from the source falls onto the center portion of the bulge, and is reflected by the same into the photocell.
  • the beam of light and the direction in which the photocell is adapted to receive light define a certain angle at whose apex the bulge is located if a copy sheet is in the correct feeding position.
  • the preferred embodiment of the invention includes a pair of feelers having engaging portions disposed along a line perpendicular to the feeding and transporting direction. Only if the leading edge of the copy sheet simultaneously engages both engaging portions of the feelers, the operation of the printing machine can be started. This is accomplished by a switch in the circuit of an electromagnetic means which causes starting of the drive means of a machine.
  • FIG. 1 is a cross sectional view illustrating a photoelectric sensing means according to the invention
  • FIG. 2 is a fragmentary elevation illustrating on em bodiment of the feeding apparatus of the invention
  • FIG. 3 is a printing machine provided with the feeding apparatus of FIG. 2;
  • FIG. 4 is a diagram illustrating the electric circuit of the apparatus.
  • the housing 1 of the photoelectric sensing means has inner cavities 2 and 6 in which a source of light in the form of an electric lamp 3, and a photocell 7 are mounted.
  • a guide channel 5 extends from cavity 1 at an acute angle to a guide channel 9 which extends from cavity 6.
  • the light of lamp 3 passes through a lens 4 and is focussed on the plane of symmetry between the tWo guide channels.
  • the point 10 where the axes of the guide channels 5 and 9 intersect in the plane of symmetry is a focus which has inner and outer limits 11 and 12.
  • the beam of light emitted by lamp 3 in the direction of the guide channel 5 is reflected in the direction of guide channel 9* and passes through a lens 8 into the photocell 7 where it produces an impulse.
  • the position of points 10 to 12 depends on the distance between lamp 3 and photocell 7, on the angles of the guide channels 5 and 9, and on the area of the cross sections of guide channels 5 and 9.
  • a supporting table 13 whose upper supporting surface is slightly inclined to a horizontal plane has a forward end located in the region of a pair of transporting rollers 16 and 19 which are mounted, respectively, on shafts 17 and 20 in such a manner as to permit a slight displacement of the transporting rollers.
  • the photoelectric sensing means 1 is located below the supporting table 13 and secured to the same.
  • Lamp 3, guide channels 5 and 9, and photocell 7 are located in cavities 2 and 6 in a plane which is perpendicular to the supporting surface of table 13 and parallel to the axes 1'7 and 20 of the transporting rollers 16 and 19. Points 10, 11, and 12 are located in this plane.
  • Support table 13 has openings registering with guide channels 5 and 9' so that light emitted by lamp 3 can illuminate a copy sheet 21 on the surface of supporting table 13.
  • a copy sheet 21 is placed by the operator on the supporting surface and pushed toward transporting rollers 16 and 19 while the copy sheet passes in flat condition across the openings in the supporting table, and the beam of light emitted through guide channel 5.
  • the lower surface of the flat copy sheet is not located between the points 11 and 12, no light can be reflected by the copy sheet into guide channel 9 to reach photocell 7.
  • a bulge 21a is formed whose highest center portion is at first located below point 11 so that photocell 7 is not energized.
  • the bulge When the bulge reaches its proper size, assumed to be located Within a range defined by points 11 and 12, the lower surface of the center portion of the bulge reflects light into guide channel 9 so that the photocell 7 is energized and produces an impulse.
  • This impulse is used for starting a printing operation of a printing machine and rotation of transporting rollers 16 and 19 so that the copy sheet is transported to assume a printing position. Since an impulse is created by the photocell 7 only if the copy sheet is in a desired correct feeding position forming a bulge of a predetermined size, only correctly positioned copy sheets can be transported to the printing means of the machine, and be imprinted.
  • a guide member 22 has a lower guide face positioned at a predetermined angle to the surface of supporting table 13, so that it is not possible to form a bulge whose highest center portion is located outside of point 12. Consequently, the operator simply forms a bulge by pushing against the copy sheet, and when a bulge having the required minimum size is formed, the reflecting center portion of the bulge is located above point 11 and the machine is started, while it is not possible to de-energize the photocell prematurely by forming a bulge whose center portion is located outside of point 12 where it cannot reflect light into photocell 7.
  • Peelers 15 and 1511 have part-circular engaging portions 15' cooperating with the copy sheets and being located in circular grooves 16a of transporting rollers 16 which is covered with a rubber sleeve.
  • Counterweights 18 are secured to the other arms of feeler levers 15, 15a and urge the same to turn in clockwise direction, as viewed in FIG. 2, to a position in which the engaging portions 15 abut transporting roller 19 which is made of steel. In this manner, a circuit is closed by each feeler arm 13 which is interrupted when the leading edge portion of the copy sheet passes between transporting rollers 19 and 16. If a leading edge is in an oblique position, the electric contact between only one feeler and transporting roller 19 is interrupted, while the other engaging portion closes a circuit in which the respective feeler and transporting roller 19 are located.
  • feelers 15 and 15a with engaging contact portions 15 are connected in parallel and close the circuit of an electromagnetic means 41 when engaging the transporting roller 19.
  • a source of voltage is connected to the points 50 and 51.
  • a relay contact means 49 is also connected in parallel with feelers 15 and 15a and transporting roller 19 and in series with electromagnetic means 41.
  • Relay contact means 49 is operated by a relay 48 which is connected by an amplifier 45 to the photocell 7.
  • An alternating current supplied by a source 47 is transformed by rectifier 46 into direct current and supplied through a switch contact 58 to the source of light 3, to amplifier 45, to terminals 50 and 51, and to terminals 53 and 54.
  • An electromagnetic means 27 is connected in series with a switch 56 controlled by electromagnetic means 41.
  • FIG. 3 illustrates a duplicating machine provided with the feeding arrangement of the invention
  • a printing roller 33 carrying a duplicating master is secured to a shaft 25 on which a chain wheel 24, and a toothed coupling wheel 23 are mounted for free rotation.
  • Chain wheel 24 with coupling wheel 23 is continuously rotated by a chain 26 driven by a motor, not shown.
  • a coupling pawl 31 is mounted on a pivot 34 carried by the printing roller 33, and is urged by a spring 32 to engage a recess of coupling wheel 23.
  • An operating lever member 28 is mounted on a stationary pivot 29 for angular movement between the position shown in FIG.
  • An electromagnetic means 27 has an armature 27a pivotally connected with operating member 28 so that the same is turned in clockwise direction releasing coupling pawl 30, 31 when electromagnetic means 27 is energized.
  • Armature 27a is also connected by pivot 40 to a lever 38 which is mounted for pivotal movement on a pin 37 carried by the machine housing.
  • An angular locking member 39 is also mounted on pivot pin 40, and cooperates with a member 42 mounted on a pin 43 and connected to the armature of another electromagnetic means 41.
  • Switch 56 which is connected in series with electromagnetic means 27, as explained with reference to FIG. 4, is operated by member 42 of electromagnetic means 41.
  • FIG. 3 also shows transporting rollers 16 and 19, feelers 15, 15a, supporting table 13, guide member 22, and photoelectric sensing means 1 as described with reference to FIG. 2.
  • a counter-pressure roller 33a cooperates with printing roller 33 in the usual manner.
  • a cam 57 is secured to printing roller 33 and has a recessed peripheral portion.
  • a control switch 58 has a cam follower portion 58a cooperating with the peripheral cam track of cam 57, and being connected in series with lamp 3 of I? 0.3 the photoelectric sensing means 1, as shown in FIG. 4.
  • the energized electromagnetic means 27 pulls its armature 27a down so that operating member 28 is turned a small angle in clockwise direction against the action of spring 44 and releases stop nose 30 of coupling pawl 31 which is turned by spring 32 to a position engaging a recess in coupling wheel 23 so that the coupling means 23, 31 is engaged and printing roller 33 is rotated by the driven chain wheel 24.
  • Transporting roller 16 is connected by a gear train, not shown, with printing roller 33 so that transporting roller 16 transports the copy sheet together with transporting roller 19 over a guide plate to the bight between the printing roller 33 and the counter-pressure roller 33a.
  • Switch 56 opens and electromagnetic means 27 is deenergized so that its spring urges armature 27 upward whereby operating member 28 is turned in counterclockwise direction to the position illustrated in FIG. 3 in which its end is located in the circular path of movement of stop nose 30.
  • stop nose 30 engages operating member 28 and is turned by the same against the action of spring 32 to the disengaged position in which the printing roller is no longer driven and stops.
  • switch 58 is connected in series with the lamp 3 of the photoelectric sensing means. As long as cam follower 58a rides on the circular peripheral portion of cam 57, switch 58 is open. Shortly before the printing roller 33 arrives in its normal position of rest, cam follower 58a passes into the recessed peripheral portion of cam 57 and closes switch 58 so that the photoelectric sensing means is rendered operative. When printing roller 33 stops, cam follower 58a is still located in the recess, and switch 58 is closed.
  • cam follower 58a is again operated to open switch 58 so that the photoelectric sensing means is rendered inoperative even if light is in some manner reflected toward the photocell 7 after the bulge of the copy sheet has been flattened by the transporting rollers.
  • the light emitted by lamp 3 can be observed by the operator before he places a copy sheet 21 on the support table 13, so that this light indicates that a printing operation has been completed, and a new operation may be started by feeding a copy sheet.
  • a feeding apparatus for feeding copy sheets, comprising means having a supporting surface for guiding a supplied copy sheet; means for engaging the leading edge of the copy sheet so that the same forms a bulge having a portion located substantially at a predetermined distance spaced from said surface only if the copy sheet is in a desired feeding position; sensing means including a source of light for directing a beam of light into the region in which said bulge of said copy sheet is positioned so that said bulge reflects the light beam, and said copy sheet only if a bulge is formed, a photocell positioned for receiving the reflected beam only if the same is reflected by said bulge when the same is located substantially at said predetermined distance whereby said photocell produces a control impulse only when said copy sheet is in said desired feeding position thereof; and means actuated by said control impulse for starting a printing operation of said printing machine.
  • a feeding apparatus for feeding copy sheets comprising means having a supporting surface for guiding a supplied copy sheet; transporting means for engaging the leading edge of the copy sheet so that the same forms: a bulge having a center portion located substantially at a predetermined distance spaced from said surface only if the copy sheet is in a desired feeding position; sensing means located in the proximity of said surface on one side of said copy sheet in a plane transverse to said surface passing through said center portion of said bulge, said sensing means including a source of light, means for directing a beam of light into the region in which said bulge of said copy sheet is positioned so that said bulge reflects the light beam, and a photocell positioned for receiving the reflected beam only if the same is reflected by said bulge when the same is located substantially at said predetermined distance whereby said photocell produces a control impulse only when said copy sheet is in said desired feeding position thereof; drive means for said printing machine and for driving said transporting means; means for starting said drive means including a first electromagnetic
  • a feeding apparatus for feeding copy sheets comprising means having a supporting top surface for guiding a supplied copy sheet; transporting means located along a line for engaging the leading edge of the copy sheet so that the same forms a bulge having a center portion located substantially at a predetermined distance spaced from and above said surface only if the copy sheet is in a desired feeding position; slanted guide means upwardly and rearwardly projecting from said table for guiding the leading portion of the copy sheet to form a bulge of a desired size; sensing means located in the proximity of said surface below said copy sheet in a plane transverse to said surface passing through said center portion of said bulge parallel to said line, said sensing means including a source of light, means for directing a beam of light into the region in which said bulge of said copy sheet is positioned so that said bulge reflects the light beam, and said copy sheet only if a bulge is formed, a photocell positioned for receiving the reflected beam only if the same is reflected by said
  • a feeding apparatus for feeding copy sheets, comprising means having a supporting surface for guiding a supplied copy sheet; transporting means for engaging the leading edge of the copy sheet so that the same forms a bulge having a portion located in a predetermined region spaced from said surface only if the copy sheet is in a desired feeding position; sensing means including a source of light for directing a beam of said source into said region so that the same is reflected by said portion of said bulge only if the copy sheet is in said desired feeding position, and a photocell positioned for receiving the beam only if the same is reflected in said region whereby said photocell produces a control impulse; a pair of feelers located in the region of said transporting means for engaging two spaced points of the leading edge of said copy sheet in said feeding position; means operable by both said feelers to be actuated only when both said feelers are engaged by the leading edge of the copy sheet; and means actuated by said control impulse and by said last mentioned actuated means for starting a printing
  • a feeding apparatus for feeding copy sheets, comprising means having a supporting surface for guiding a supplied copy sheet; transporting means located along a line for engaging the leading edge of the copy sheet so that the same forms a bulge having a center portion located in a predetermined region spaced from said surface only if the copy sheet is in a desired feeding position; sensing means located in the proximity of said surface on one side of said copy sheet in a plane transverse to said surface passing through said center portion of said bulge parallel to said line, said sensing means including a source of light, means for directing a beam of said source into said region so that the same is reflected by said center portion of said bulge only if the copy sheet is in said desired feeding position, and a photocell positioned for receiving the beam only if the same is reflected in said region whereby said photocell produces a control impulse; a pair of feelers located in the region of said transporting means on said line for engaging two spaced points of the leading edge of said copy sheet in said feeding position;
  • a switch actuating means driven by said printing machine in synchronism with the same; and switch means controlled by said switch actuating means and connected with said source for energizing the same only in a predetermined position of said printing machine.
  • a switch actuating means driven by said printing machine in synchronism with the same; and switch means controlled by said switch actuating means and connected with said source for energizing the same only in a predetermined position of said printing machine.
  • a feeding apparatus for manually feeding copy sheets, comprising means having a supporting top surface for guiding a supplied copy sheet; transporting means for engaging the leading edge of the fed copy sheet so that the same forms a bulge having a portion located substantially at a predetermined distance above and spaced from said surface only if the copy sheet is in a desired feeding position; sensing means including a source of light, means for directing at a predetermined angle to said surface upwardly a beam of light into the region in which said bulge of said copy sheet is positioned so that said bulge reflects the light beam, and a photocell having guide means extending downwardly at said last mentioned angle and being positioned below said top surface for receiving the beam only if the same is downwardly reflected by said bulge when the same is substantially located at said predetermined distance whereby said photocell produces a control impulse; and means actuated by said control impulse for starting a printing operation of said printing machine.
  • said sensing means including lens means for focussing a beam of said source into said region.
  • a feeding apparatus for feeding copy sheets, comprising a feeding table having a supporting surface; transporting roller means mounted at the forward end of said surface for engaging the leading edge of a copy sheet moved along said surface so that the copy sheet forms a bulge having a center portion located substantially at a predetermined distance in a predetermined region above said surface when the copy sheet is in a desired feeding position; sensing means mounted on said table below said surface in a plane transverse to said surface passing through said center portion of said bulge, and including a source of light, means for directing a beam of light of said source upwardly at an angle into said region, a photocell, and means extending at said angle to said surface for receiving the beam of light downwardly reflected by said center portion of said bulge only when said center portion of said bulge is substantially located at said distance in said feeding position of said copy sheet and for directing the beam to said photocell whereby said photocell produces a control impulse only if the copy sheet is in said feeding position; and means actuated by said control
  • a feeding apparatus for feeding copy sheets, comprising a feeding table having a supporting surface; transporting roller means mounted at the forward end of said surface for engaging the leading edge of a copy sheet moved along said surface so that the copy sheet forms a bulge having a center portion located in a predetermined region above said surface when the copy sheet is in a desired feeding position; sensing means mounted on said table in a plane transverse to said surface passing through said center portion of said bulge, and including a source of light, means for directing a beam of said source at an angle into said region, a photocell, and means extending at said angle to said surface for receiving the beam of light reflected by said center portion of said bulge only in said feeding position of said copy sheet and for directing the beam to said photocell whereby said photocell produces a control impulse only if the copy sheet is in said feeding position; a pair of feelers located in the region of said transporting roller means and having feeler portions located along a line for engaging two spaced points of the leading edge of said
  • a feeding apparatus for feeding copy sheets comprising a feeding table having a supporting surface; transporting roller means mounted at the forward end of said surface for engaging the leading edge of a copy sheet moved along said surface so that the copy sheet forms a bulge having a center portion located in a predetermined region above said surface when the copy sheet is in a desired feeding position; sensing means mounted on said table in a plane transverse to said surface passing through said center portion of said bulge, and including a source of light, a lens and a guide channel for directing a beam of said source at an angle into said region, a photocell, a guide channel extending at said angle to said surface and at an angle to said first mentioned guide channel for receiving the beam of light reflected by said center portion of said bulge only in said feeding position of said copy sheet and for directing the beam to said photocell, and another lens in said last-mentioned guide channel whereby said photocell produces a control impulse only if the copy sheet is in said feeding position; and means
  • a feeding apparatus for feeding copy sheets comprising a feeding table having a supporting surface; transporting roller means mounted at the forward end of said surface for engaging the leading edge of a copy sheet moved along said surface so that the copy sheet forms a bulge having a center portion located substantially at a predetermined distance in a predetermined region above said surface when the copy sheet is in a desired feeding position; sensing means mounted on said table in a plane transverse to said surface passing through said center portion of said bulge, and including a source of light, means for directing a beam of light of said source at an angle into said region, a photocell, and means extending at said angle to said surface for receiving the beam of light reflected by said center portion of said bulge only when said center portion of said bulge is substantially located at said distance in said feeding position of said copy sheet and for directing the beam to said photocell whereby said photocell produces a control impulse only if the copy sheet is in said feeding position; drive means for said printing machine; one revolution coupling means con nect
  • a feeding apparatus for feeding copy sheets comprising a feeding table having a supporting surface; transporting roller means mounted at the forward end of said surface for engaging the leading edge of a copy sheet moved along said surface so that the copy sheet forms a bulge having a center portion located in a predetermined region above said surface when the copy sheet is in a desired feeding position; sensing means mounted on said table in a plane transverse to said surface passing through said center portion of said bulge, and including a source of light, means for directing a beam of said source at an angle into said region, a photocell, and means extending at said angle to said surface for receiving the beam of light reflected by said center portion of said bulge only in said feeding position of said copy sheet and for directing the beam to said photocell whereby said photocell produces a control impulse only if the copy sheet is in said feeding position; drive means for said printing machine; one revolution coupling means connecting said drive means with said printing machine; an operating member for actuating said one revolution coupling means; and means for
  • a feeding apparatus for feeding copy sheets comprising a feeding table having a supporting surface; transporting roller means mounted at the forward end of said surface for engaging the leading edge of a copy sheet moved along said surface so that the copy sheet forms a bulge having a center portion located in a predetermined region above said surface when the copy sheet is in a desired feeding position; said transporting roller means including two rollers, one of said rollers having a conductive surface; sensing means mounted on said table in a plane transverse to said surface passing through said center portion of said bulge, and including a source of light, means for directing a beam of said source at an angle into said region, a photocell, and means extending at said angle to said surface for receiving the beam of light reflected by said center portion of said bulge only in said feeding position ofsaid copy sheet and for directing the beam to said photocell whereby said photocell produces a control impulse only if the copy sheet is in said feeding position; a pair of feelers located in the region of said transporting roller
  • a feeding apparatus for feeding copy sheets comprising a feeding table having a supporting surface; transporting roller means mounted at the forward end of said surface for en- I 11 gaging the leading edge of a copy sheet moved along said surf-ace so that the copy sheet forms a bulge having a center portion located in a predetermined region above said surface when the copy sheet is in a desired feeding position, said transporting roller means including a pair of transporting rollers one of which is conductive; sensing means mounted on said table in a plane transverse to said surface passing through said center portion of said bulge, and including a source of light, means for directing a beam of said source at an angle into said region, a photocell, and means extending at said angle to said surface for receiving the beam of light reflected by said cen ter portion of said bulge only in said feeding position of said copy sheet and for directing the beam to said photocell whereby said photocell produces a control impulse only if the copy sheet is in said feeding position; a pair of feelers
  • a feeding apparatus for feeding copy sheets comprising a feeding table having a supporting surface; transporting roller means mounted at the forward end of said surface for engaging the leading edge of a copy sheet moved along said surface so that the copy sheet forms a bulge having a center portion located in a predetermined region above said surface when the copy sheet is in a desired feeding position, said transporting roller means including a pair of transporting rollers one of which is conductive; sensing means mounted on said table in a plane transverse to said surface passing through said center portion of said bulge, and including a source of light, a lens and a guide channel for directing a beam of said source at an angle into said region, a photocell, and a lens and guide channel extending at said angle to said surface and at an angle to said first mentioned guide channel for receiving the beam of light reflected by said center portion of said bulge only in said feeding position of said copy sheet and for directing the beam to said photocell whereby said photocell produces a control impulse only if the copy
  • a switch actuating means driven by said printing machine in synchronism with the same; and switch means controlled by said switch actuating means and connected with said source for energizing the same only in a predetermined position of said printing machine.
  • a rotary cam driven by said printing machine in synchronism with the same; and switch means including a cam follower cooperating with said rotary cam so that said switch means is closed when said printing machine is in a home position, said switch means being connected with said source of light for energizing the same only in said home position of said printing machine.

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  • Handling Of Cut Paper (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US475077A 1964-07-29 1965-07-27 Feeding apparatus for printing machines Expired - Lifetime US3335662A (en)

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Application Number Priority Date Filing Date Title
DER38482A DE1217980B (de) 1964-07-29 1964-07-29 Rotationsvervielfaeltiger zum Abdrucken von Druckformen auf Blaetter, Karten od. dgl.

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US3335662A true US3335662A (en) 1967-08-15

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US475077A Expired - Lifetime US3335662A (en) 1964-07-29 1965-07-27 Feeding apparatus for printing machines

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US (1) US3335662A (de)
AT (1) AT263052B (de)
CH (1) CH435331A (de)
DE (1) DE1217980B (de)
FR (1) FR1445033A (de)
SE (1) SE302970B (de)

Cited By (8)

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US3647205A (en) * 1970-05-15 1972-03-07 Polygraph Leipzig Method and apparatus for feeding of sheets fittingly aligned to a machine
US3650526A (en) * 1970-01-20 1972-03-21 Herman J Schultz Apparatus for feeding paper booklets and the like
US3673419A (en) * 1970-03-16 1972-06-27 Copystatics Mfg Corp Automatic shut-off mechanism for copying machine
US3790159A (en) * 1972-05-16 1974-02-05 Xerox Corp Automatic document handling device
US4320961A (en) * 1980-01-28 1982-03-23 Nashua Corporation Jam detecting apparatus and method for electrostatic copier
US4548401A (en) * 1977-10-13 1985-10-22 Olympus Optical Company Ltd. Sheet feed apparatus
US5232212A (en) * 1991-04-29 1993-08-03 Eastman Kodak Company Sheet sensor in sheet film transport apparatus
US5390908A (en) * 1992-07-01 1995-02-21 Heidelberger Druckmaschinen Ag Device and method for detecting and gripping sheets

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US2903965A (en) * 1955-10-05 1959-09-15 Eichenbaum William Control system for duplicating machines
US3216351A (en) * 1961-06-05 1965-11-09 Ritzerfeld Wilhelm Apparatus for controlling the rotary motion of a printing roller

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DE1163344B (de) * 1960-02-09 1964-02-20 Wilhelm Ritzerfeld Rotationsvervielfaeltiger zum ganzseitigen, zeilen- oder abschnittweisen Abdrucken von Spiegelbilddruckformen auf Blaetter, Karten od. dgl.

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US2903965A (en) * 1955-10-05 1959-09-15 Eichenbaum William Control system for duplicating machines
US3216351A (en) * 1961-06-05 1965-11-09 Ritzerfeld Wilhelm Apparatus for controlling the rotary motion of a printing roller

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650526A (en) * 1970-01-20 1972-03-21 Herman J Schultz Apparatus for feeding paper booklets and the like
US3673419A (en) * 1970-03-16 1972-06-27 Copystatics Mfg Corp Automatic shut-off mechanism for copying machine
US3647205A (en) * 1970-05-15 1972-03-07 Polygraph Leipzig Method and apparatus for feeding of sheets fittingly aligned to a machine
US3790159A (en) * 1972-05-16 1974-02-05 Xerox Corp Automatic document handling device
US4548401A (en) * 1977-10-13 1985-10-22 Olympus Optical Company Ltd. Sheet feed apparatus
US4320961A (en) * 1980-01-28 1982-03-23 Nashua Corporation Jam detecting apparatus and method for electrostatic copier
US5232212A (en) * 1991-04-29 1993-08-03 Eastman Kodak Company Sheet sensor in sheet film transport apparatus
US5390908A (en) * 1992-07-01 1995-02-21 Heidelberger Druckmaschinen Ag Device and method for detecting and gripping sheets

Also Published As

Publication number Publication date
DE1217980B (de) 1966-06-02
FR1445033A (fr) 1966-07-08
AT263052B (de) 1968-07-10
CH435331A (de) 1967-05-15
SE302970B (de) 1968-08-12

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