US3834505A - Ink jet printing apparatus with line sweep and incremental printing facilities - Google Patents

Ink jet printing apparatus with line sweep and incremental printing facilities Download PDF

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Publication number
US3834505A
US3834505A US00313919A US31391972A US3834505A US 3834505 A US3834505 A US 3834505A US 00313919 A US00313919 A US 00313919A US 31391972 A US31391972 A US 31391972A US 3834505 A US3834505 A US 3834505A
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United States
Prior art keywords
character
printed
symbol
individual
cycle
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Expired - Lifetime
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US00313919A
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English (en)
Inventor
R Fowler
N Perkins
M Sendelweck
J Hill
Cornack R Mc
K Yosmali
D West
T Williams
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International Business Machines Corp
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International Business Machines Corp
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Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US00313919A priority Critical patent/US3834505A/en
Priority to CA178,371A priority patent/CA986170A/en
Priority to IT30496/73A priority patent/IT998914B/it
Priority to FR7339438A priority patent/FR2212783A5/fr
Priority to GB5451673A priority patent/GB1409386A/en
Priority to JP48132262A priority patent/JPS5234332B2/ja
Priority to DE2361297A priority patent/DE2361297C2/de
Application granted granted Critical
Publication of US3834505A publication Critical patent/US3834505A/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/18—Mechanisms for rendering the print visible to the operator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/18—Character-spacing or back-spacing mechanisms; Carriage return or release devices therefor
    • B41J19/20—Positive-feed character-spacing mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J21/00—Column, tabular or like printing arrangements; Means for centralising short lines
    • B41J21/18—Column, tabular or like printing arrangements; Means for centralising short lines characterised by applications of scales or indicators

Definitions

  • Structures and circuits are included for insuring correct location of information within the character boxes and also providing for one mode in which characters are printed continuously line-by-line and another mode in which characters are printed incrementally characterby-character.
  • incremental printing as well as the first character in a line or group of characters, provision is made for re-bounding the printhead back into the box of the character just printed, that is, prior to the next character box to be printed to insure that when the printhead starts up again for the next character that all drop components for that character, including any located in the immediate vicinity of the character boundary, are properly placed during printmg.
  • the Rossetto patent describes photocomposing apparatus making use of a grating for determination of character increments.
  • the Stabler patent describes a shaft position indicator for recognizing direction of rotation of a shaft and having an associated counting means.
  • the Woodhead patent describes a counter for keeping track of printer position.
  • the Sims patent describes a power typing system incorporating an IBM Selectric" printer with an associated magnetic tape storage unit with recording and reading facilities. Line readjustment capabilities are also described.
  • the Locklar, et al., patent describes an apparatus similar to the Sims system with provision for selection of information on a character, word, and line basis.
  • the Jones, et al., patent describes an automatic typing system incorporating an IBM Selectric Type writer together with an associated magnetic card storage unit having recording and reading facilities.
  • the Hayes patent describes an electrical keyboard unit.
  • the ink jet printing system described herein is designed to operate both in line and incremental modes.
  • the carrier on which are mounted the ink jet hardware and optical sensor, is moved from left to right at a reasonably constant speed not exceeding 10 inches per second and has a high carrier return speed of 40-50 inches per second.
  • a clock spring and escapement rack allows the carrier to stop at 0.100 inch intervals while it moves from the left to the right side of the machine.
  • Tab, Backspace and platen Index capabilities are also included.
  • An electrical switch allows the machine to be operated in either mode of printing.
  • Ink drops are formed at a high frequency such as kiloHertz and propelled from a nozzle at a high speed, and are directed toward a document to be printed with suitable plalcement of drops to form character matrices, such matrix comprising a predetermined number of vertical columns of drops, such as 24 and each column comprising a plurality of drops, such as 40.
  • a raster scan is used to print the characters. Deflection of ink drops in the vertical direction is by electrostatic action, while deflection in the horizontal direction is primarily by mechanical motion.
  • a line grating is used having a line to define each vertical column of drops. Where printing is continuous and the stream motion is in a constant direction, this grating is sufficient.
  • the head since the head must start and stop the fine grating is supplemented by a second grating which has one line for each character position. If the head is stopped short of a character line, then the line can be used to indicate to the electronics when to start printing the related character (i.e. when to look at the line grating). This allows the mechanism greater freedom in where the head stops.
  • the system described here is operable on an incremental character-by-character basis wherein characters are defined by character boundaries, individual characters having components close to the boundaries and incorporates facilities automatically operable to position the printhead prior to the starting boundary of a character to be printed to insure proper placement of components.
  • the primary object of the present invention is to pro- I vide ink jet printing apparatus having both line printing
  • a still further object of the present invention is to provide an ink jet printing system having facilities for accurate and complete placement of character components. 2
  • FIG. 1 illustrates an ink jet' printing system incorporating a printer and having an associated magnetic card recording/reproducing unit with both line printing and character-by-character printing facilities.
  • FIG. 2a illustrates various pulse waveforms provided for in the system of FIG. 1, together with carrier motions encountered during incremental printing.
  • FIG. 2b is a supplementary waveform showing a left margin signal.
  • FIG. 3 illustrates a coarse and fine grating and associated circuits for controlling printing of information and charging of drops.
  • FIG. 4a is a block diagram of the ink jet printing apparatus of FIG. 1 showing a number of significant control lines and suitable data sources.
  • FIG. 4b is a block diagram illustrating some of the printer mechanical signals involved.
  • FIG. 1 illustrates an ink jet printing system incorporating a typewriter l with an associated magnetic card recording/reproducing unit 2.
  • Card unit 2 is shown for convenience only since by inspection of FIG. 4a, it is apparent that other kinds of storage units, recordinglreproducing units, and the like, may be used in the system.
  • Typewriter 1 has the usual keyboard 3 which preferably is of the electrical type referred to in some of the IBM Customer Engineering Manuals listed previously. It may also be of the type described in the Hayes, et al., patent.
  • Printer 1 incorporates an ink jet head assembly 4 arranged for travelling movement from left to right (and conversely) adjacent a document 7 to be printed.
  • Assembly 4 has an ink drop nozzle and an associated grating 8 with an upper incremental column location scale and a lower character scale as shown in greater detail in FIG. 3.
  • Printer '1 may be provided with various control buttons 10, ll, 12 and l3for automatic, line, word, and character printing, respectively.
  • Other keybuttons 15-18 concern mode selection, that is, line printing or character printing, playback, adjust, and skip, respectively.
  • the magnetic card unit 2 has a load slot 25 and a track indicator 26. Also provided on unit 2 is a card eject button 27, a track ste'pdown button 28 and a track stepup button 29 for relocating the scanning transducer with respect to the various tracks on the card. Reference is made to the various magnetic card manuals and the Jones, et al., patent for a description of facilities in the card unit.
  • Printer 1 incorporates a left margin reed switch 30, a drop carrier return reed switch 31 and a right margin reed switch 32. These may be of the type set forth in the Burdick, et al., and Dorius, et al., publications.
  • FIG. 2a illustrates various mechanical movements encountered in the system of FIG. 1 during movement of head assembly adjacent document 7, while FIG. 3
  • FIG. 2b illustrates a left margin signal 61 with portion 61a representing closure of switch 30 indicative of the left margin zone, portion 61b indicating transfer of switch 30 and portion 610 indicating printing zone.
  • Signal 61 is combined with character signal 62 from portion 8b of grating 8 to control printing of the first character.
  • Portion 62a reflects overrun of the grating in an incremental mode.
  • head assembly 4 moves from the left of margin switch 30 to the right across document 7 to print characters in a continuous fashion.
  • a carrier return operation is performed as determined by the location of the switch 32, FIG. 1, or as a result of a line ending code from the data source, and head assembly 4 returns beyond the left margin at switch location 30.
  • a sensor assembly such as that shown in FIG. 6.
  • This comprises a supporting structure 30 incorporating a lamp 32 arranged to direct light thru grating 8 to a reflecting lens 34. Light is then returned for reflection at by mirror 35 to a photosensor pickup 36 for development of the pulses such as those illustrated in FIG. 2a referred to a fme grating pulses and coarse grating pulses, respectively.
  • a photosensor pickup 36 for development of the pulses such as those illustrated in FIG. 2a referred to a fme grating pulses and coarse grating pulses, respectively.
  • two photo-sensor assemblies such as that shown in FIG. 6 would ordinarily be included in the nozzle assembly 4 in order to sense the two sets of marks on grating 8.
  • FIG. 5 various structures incorporated in head assembly 4 are illustrated.
  • This includes apump 40 for directing ink from an ink supply conduit 41 on demand as a crystal 42 is energized, that is,pulsed at high frequencies.
  • the rate of impuls'ing crystal 42 may be in the range of kiloHertz for example.
  • Ink drops are emitted from nozzle 43 and pass through a charge electrode 44 forvariable charging in accordance with the output of a charge amplifier to achieve deflection of the drops in a column an amount representing the vertical height of the drop location in any given character.
  • the letter capital S designated 50 comprises a number of vertical columns 51.
  • the printing is such that a sequence of drops forming vertical columns, each column comprising a plurality of drops, such as 40 in number, is propelled from nozzle 43 toward document 7 for the printing of the character involved. If drops are not required for printing, they are directed to a gutter 53 for passage by means of a conduit 54 back to the ink supply, customarily.
  • a pair of deflection plates 60 and 61 is positioned in the path of travel of the drops leaving the charge electrode 44.
  • a constant high potential is applied across plates 60 and 61 and this in cooperation with the variable charge on the individual drops determines the amount of deflection as the drops are directed toward document 7.
  • Grating 8a in this instance is shown as being positioned horizontally rather than vertically as in FIG. 1, but the positioning is immaterial.
  • the individual characters are located within character boxes comprising perhaps 40 drop locations in height and 24 drop locations in width, that is, 24 columns wide.
  • printer 1 If it is assumed that printer 1 is in a line mode and the system is in a playback mode, appropriate positioning of a card, not shown, results in card unit 2.furnishing signals to the printer 1 to determine the printing of characters.
  • head assembly 1 leaves the left margin which results in setting the left margin latch 70, FIG. 3.
  • An output indicating print is provided from latch 70 on line 71 to And circuit 72 and remains at an up level until an end of line signal is received from card unit 2 on line 75.
  • signals are provided to amplifier circuits 80 and 81 from the respective portions 8a and 8b of grating 8.
  • portion 8a of grating 8 has marks thereon indicative of column locations in the individual characters.
  • the column lines are provided at 240 per inch in portion 8a.
  • portion 8b of grating is not used.
  • Amplifier 81 is degated by a signal on line 82 and character latch 85 is set by a signal on line 83.
  • Latch 85 is reset at the end of a character by a signal on line 84.
  • Character position and width are determined strictly by character generator 130, FIG. 4a, to allow for proportionally spaced characters, if desired.
  • portion 8b of grating 8 has lines engraved thereon to indicate each character location encountered by head assembly 4 as it traverses document 7 during printing.
  • the setting of latch 85 in conjunction with And circuit 72 provides gating for one input of And circuit 87 on line 86.
  • the other input occurs from amplifier 80 when each fine mark is sensed in portion 8a of grating 8.
  • ramp generator 90 is activated to provide a sloped signal on line 91 to charge amplifier 92 which drives the charge electrode 44 previously discussed in connection with FIG. 5.
  • the charge exerted on charge electrode 44 determines at what drop location a drop will ultimately arrive within a given column of drops in the character box on document 7. If no drop is required, that is, it is to be directed to gutter 53, FIG. 5, then a blank signal on line 93 to amplifier circuit 92 results in no charge on the drop and it lands in gutter 53.
  • An unblank signal on line 93 enables amplifier 92 to charge the particular drop occurring at that time from nozzle 43 with a voltage representative of the drop location to which it is directed on document 7.
  • FIG. 2a illustrates some of the conditions occurring during incremental printing. That is, on a character-bycharacter basis.
  • the movement of the carrier is indicated by line 100 in relation to a mechanical escapement rack 101 to be described in greater detail later.
  • the coarse grating indicates individual character boxes as shown in FIG. 2a. It is assumed that an incremental mode has been selected by depression of keybutton 15 on printer 1, FIG. 1. Then appropriate signals are provided to enable printing of the character and development of signals from the portions 8a and 8b of grating 8.
  • detection of a character mark in portion 8b initiates an output from amplifier 81 to set latch 85 and the action of the circuit in FIG. 3 is essentially as previously described.
  • Mechanisms are provided that will be discussed shortly for relatively moving the carrier backwardly in relation to the start of a character box to insure the proper placement of drops close to the character box boundary. This is indicated, as an example, by portion 100a of line 100 in FIG. 22a. Typically this increment amounts to 0.020 inch.
  • the carrier is released to move as indicated by portion 10% of line 100, further comprising a start up interval 100b, FIG. 2a, and some slight overrun occurs as shown by portion 100C past the character box and into the next character box.
  • the mechanisms are such that the carrier is returned into the character box 7 just printed as shown by portion 100d of line 100.
  • the carrier is positioned prior to but in readiness for printing of the next character in the subsequent character box. This is indicated by line portion e, further comprising start up interval 100e'.
  • FIG. 4a is a system block diagram incorporating a data source 110, such as a processor, card unit, tape unit, or the like and having various control lines -128 interconnected with a character generator box and printer control circuits 131. Other lines 134-141 interconnect the character generator 130 and printer control circuit 131 with the head assembly 4.
  • a data source 110 such as a processor, card unit, tape unit, or the like
  • various control lines -128 interconnected with a character generator box and printer control circuits 131.
  • Other lines 134-141 interconnect the character generator 130 and printer control circuit 131 with the head assembly 4.
  • the logic representing various mechanical functions has inputs on lines ISL-156 providing control for various operational circuits 160 and ultimately to the printer mechanisms 161 with various feedback signals on lines 163.
  • FIGS. 7-9 illustrate various mechanisms incorporated in printer] for facilitating movement of head assembly 4 on carrier 5.
  • an escapement pawl assembly including an escapement pawl I81 mounted for engagement with the escapement rack 101 previously referred to in connection with FIG. 20.
  • FIGS. 7-8 Attached to carrier 5 is a cable 184 routed on pulleys 185-189 and coupled to a rear cord drum 190 and a front cord drum 191. Two pulleys 189a and 18% are shown in place of the pulleys 188 and 189 in FIG. 9. The principles of operation are the same.
  • a main spring 200 provides driving force to move carrier 5 in the tab direction from left to right in FIGS. 7 and 9.
  • a motor 201, FIG. 9 provides driving force by a belt 202 and pulleys 203 and 204 to a drive shaft 205 in order to move carrier 5 in the carrier'return direction, that is from right to left, and also to wind up main spring 200 in readiness for a subsequent movement of carrier 5 from left to right.
  • Several spring clutches 210 and 211 are provided in the mechanism, more fully illustrated in FIG. 9.
  • a face gear 215 Positioned on the forward end of shaft 213 associated with main spring 200 is a face gear 215 having an associated small gear 216 cooperating with a floating carrier return gear 217 arranged for coupling with spring clutch 210.
  • Face gear 215 has an associated tab governor gear 220 that also floats on shaft 205.
  • pawl 181 is released from escape- -ment rack 10] thereby enabling main spring 200 to drive carrier 5 by means of cable 184 and cord drums 190 and 191.
  • the carrier return shoe 225 is engaged against spring clutch 210 by mechanisms not shown thereby coupling the drive from shaft 205 through hub 227 which is fixed to shaft 205 through clutch 210 and by way of the carrier return gear 217 and gear 216 to reverse the rotation of shaft 213, associated cord drums 190 and 191 and thereby to reverse the direction of cable 184 in order to move carrier 5 from right to left in the printer.
  • pawl 181 is released from rack 101 just long enough for movement of carrier 5 one character location to the right. Prior to the completion of the movement of a complete character, pawl 181 moves back intoposition for engagement with the next tooth on rack 101. This can be seen in FIG. 8.
  • bracket 180 Associated with bracket 180 is a pin 182 riding in an elongated slot 181a in'pawl 181.
  • a spring 183 is connected between pin 182 and pin 196 that is mounted on the left most extremity of pawl 18.1.
  • Slot 181a enables engagement of pawl 181 but results in an over-shoot of carrier 5 past the character location as illustrated by portion 100c in FIG. 2a.
  • Main spring 200 tends to pull the entire carrier assembly to the right by means of cable 184.
  • spring 183 is somewhat stronger than main spring 200 and immediately after the over-shoot represented by portion 1000 in 2a, spring 183 pulls bracket 180 and associated carrier 5 rearwardly, that is to the left as indicated'by line 100d, FIG. 2a, into the character box just printed and thereby, the carrier is located a sufficient distance back of the next character to be printed.
  • the carrier 5 does not have to stop precisely at the boundary of they character not to be printed, such as character box C, FIG. 2a.
  • a printing apparatus having provision for successively incrementally printing individual characters in predefined character locations on a receiving member by a printhead, each of said characters comprising components that are printed between and including a character starting position and a character termination position, a method for insuring that all components of a character to be printed are properly printed within its respective character location, said apparatus being operable to print all components of each individual character during a single character print cycle, each said print cycle comprising first, second and third cycle portions, comprising:
  • each said print cycle relatively moving said receiving member and said printhead from a position'prior to the starting position of a character to be printed, said printhead having facilities for printing and being operable to print the components of each individual character during the relative movement in said first cycle portion;
  • a marking apparatus having provision for successively incrementally printing individual symbols in predefined symbol locations on a receiving member by a printhead, each of said symbols comprising columns of markings that are printed between and including a symbol starting'column position and a symbol termination column position, a method for insuring that all components of a symbol to be printed are properly printed within its respective symbol location, said appas ratus being operable to print all components of each individual symbol during a single symbol print cycle, each said print cycle comprising first, second and third cycle portions, comprising;
  • Marking apparatus for successively printing individual symbols in predefined symbol locations, each of said symbols comprising columns of marking components that are printed between and including a symbol starting columnar position and a symbol termination columnar position, an arrangement for insuring that all components of a symbol to be printed are properly printed within its respective symbol location, said apparatus being operable to print all components of each individual symbol during a single symbol print cycle each said print cycle comprising first, second and third cycle portions, comprising:
  • printhead means mounted for movement adjacent said document for selectively forming, propelling, charging and deflecting marking components toward said document;
  • moving means operable during the first cycle portion of each said print cycle for relatively moving said document and said printhead means from a position prior to the starting position of the symbol to be printed in order to print a symbol on said document during said relative movement;
  • overbound means interconnected with said moving means and operable during the second cycle portion of each individual symbol print cycle for overbounding said printhead means past the termination position of said individual symbol into the next succeeding symbol location to insure the printing of all columnar marking components of said individual symbol prior to and including said termination position; and y 5.
  • re-bound means interconnected with said moving means and operable during the third cycle portion of each said print cycle, following the overbounding of said printhead means for re-bounding and stopping said printhead means back prior to the starting position of the individual symbol to be printed in the next symbol print cycle to thereby insure that a start-up interval exists prior to the starting columnar position of the next symbol to be printed.
  • each of said characters comprising marking components that are printed between and including a character starting position and a character termination position, an arto print all components of each individual character during a single symbol print cycle, each said print cycle comprising first, second and third cycle portions, comprising:
  • printhead means mounted adjacent said document for selectively forming, propelling, charging and deflecting marking components toward said document;
  • moving means operable during the first cycle portion of each said print cycle for relatively moving said document and said printhead means from a position prior to the starting position of the character to be printed in order to print a character on said document during said relative movement;
  • overbound means interconnected with said moving means and operable during the second cycle portion of each individual character print cycle for overbounding said printhead means past the termination position of said individual character into the next succeeding character location to insure the printing of all marking components of said individual character prior to and including said termination position;
  • re-bound means interconnected with said moving means and operable during the third cycle portion of each said print cycle, following the overbounding of said printhead means for re-bounding and stopping said printhead means back prior to the starting position of the individual character to be printed in the next character print cycle to thereby insure that a start-up interval exists prior to the starting position of the next character to be printed.
  • degate means interconnected with said overbound means and said rebound means, said degate means being operable to recognize occurrence of at least two characters to degate said overbound and said rebound means to prevent operation of said overbound and said re-bound means between said characters;
  • gating means interconnected with said overbound means and said rebound means, said gating means being operable to recognize the last character in a series to be printed to initiate operation of said overbound and re-bound means, whereby overbounding and re-bounding occur only with respect to the last character printed in a series of characters.
  • marking components are arranged in a plurality of columnar locations for each character printed, and further comprising:
  • grating means said grating means comprising markings arranged in first and second sets, the first set defining character locations and the second set defining columnar locations in each character;
  • each sensor means providing signal representative of the location of characters and columns relative to the respective grating associated with each said sensor means during relative movement in said apparatus;
  • escapement means for controlling incremental movement of said printhead means relative to said document, said escapement means incorporating a pawl element having an elongated slot, and said escapement means further incorporating a pin element mounted for engagement with said slot in said pawl element, and said pawl element further having a fixed pin element thereon;
  • first timing means providing signals for defining character locations during printing
  • second timing means providing signals for defining marking component locations during printing
  • a data source said data source providing signals to said first timing means for controlling the locations of characters.

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US00313919A 1972-12-11 1972-12-11 Ink jet printing apparatus with line sweep and incremental printing facilities Expired - Lifetime US3834505A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00313919A US3834505A (en) 1972-12-11 1972-12-11 Ink jet printing apparatus with line sweep and incremental printing facilities
CA178,371A CA986170A (en) 1972-12-11 1973-08-08 Ink jet printing apparatus with line sweep and incremental printing facilities
IT30496/73A IT998914B (it) 1972-12-11 1973-10-24 Apparecchiatura di stampa a getto di inchiostro perfezionata
FR7339438A FR2212783A5 (it) 1972-12-11 1973-10-29
GB5451673A GB1409386A (en) 1972-12-11 1973-11-23 Matrix printer
JP48132262A JPS5234332B2 (it) 1972-12-11 1973-11-27
DE2361297A DE2361297C2 (de) 1972-12-11 1973-12-08 Tintenstrahldruckeinrichtung

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US00313919A US3834505A (en) 1972-12-11 1972-12-11 Ink jet printing apparatus with line sweep and incremental printing facilities

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CA (1) CA986170A (it)
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US3970183A (en) * 1974-06-05 1976-07-20 Centronics Data Computer Corporation Random access line printer
FR2319496A1 (fr) * 1975-07-28 1977-02-25 Centronics Data Computer Imprimante electronique
US4029192A (en) * 1975-02-27 1977-06-14 Burroughs Corporation Digital circuit for controlling the return speed of a business machine carriage
US4050563A (en) * 1975-11-05 1977-09-27 Centronics Data Computer Corporation Apparatus for selectable font printing
US4051485A (en) * 1972-10-24 1977-09-27 Oki Electric Industry Company, Ltd. Printing apparatus
DE2855063A1 (de) * 1977-12-23 1979-07-05 Ibm Tintenstrahldrucker
US4167014A (en) * 1977-02-25 1979-09-04 International Business Machines Corporation Circuitry for perfecting ink drop printing at varying carrier velocity
US4167013A (en) * 1977-02-25 1979-09-04 International Business Machines Corporation Circuitry for perfecting ink drop printing at nonlinear carrier velocity
WO1980000944A1 (en) * 1978-11-08 1980-05-15 Ncr Co An apparatus for producing imprints along a line on a recording medium
US4208139A (en) * 1974-09-06 1980-06-17 Sharp Kabushiki Kaisha Carriage position control in a printer of the carriage traveling mode
DE2906135A1 (de) * 1979-02-17 1980-08-28 Olympia Werke Ag Druckwerk zur herstellung eines schriftbildes mit gleichmaessigen zeichenabstaenden
US4254439A (en) * 1979-12-26 1981-03-03 International Business Machines Corporation Facsimile mid-page restart
US4303925A (en) * 1979-06-27 1981-12-01 International Business Machines Corporation Method and apparatus for controlling the position of printed ink droplets
WO1985005594A1 (fr) * 1984-06-06 1985-12-19 Quadim Sa Appareil individuel, manuel, pour l'impression de caracteres ou d'elements graphiques
EP0172709A1 (en) * 1982-08-09 1986-02-26 Willett International Limited Method of applying droplets of an adhesive using an ink jet printer apparatus
US4647239A (en) * 1984-07-09 1987-03-03 Sharp Kabushiki Kaisha Paper loading system for use in a printer
US5451991A (en) * 1988-08-19 1995-09-19 Canon Kabushiki Kaisha Recording apparatus

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Publication number Priority date Publication date Assignee Title
US4216480A (en) * 1978-11-13 1980-08-05 International Business Machines Corporation Multiple speed ink jet printer

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DE2361297A1 (de) 1974-06-12
CA986170A (en) 1976-03-23
IT998914B (it) 1976-02-20
DE2361297C2 (de) 1984-10-31

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