US3628645A - Carriage drive mechanism - Google Patents

Carriage drive mechanism Download PDF

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Publication number
US3628645A
US3628645A US868779A US3628645DA US3628645A US 3628645 A US3628645 A US 3628645A US 868779 A US868779 A US 868779A US 3628645D A US3628645D A US 3628645DA US 3628645 A US3628645 A US 3628645A
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US
United States
Prior art keywords
groove
carriage
cycle
helical
helical groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US868779A
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English (en)
Inventor
Earl W Mcfeaters
James P Donohue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NCR Voyix Corp
National Cash Register Co
Original Assignee
NCR Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NCR Corp filed Critical NCR Corp
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Publication of US3628645A publication Critical patent/US3628645A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41J19/68—Carriage-return mechanisms, e.g. manually actuated
    • B41J19/70—Carriage-return mechanisms, e.g. manually actuated power driven
    • 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
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y10T74/18304—Axial cam
    • Y10T74/18312—Grooved

Definitions

  • M uclrenthaler AESTEACT A drive mechanism applicable to high-speed printing apparatus for moving a printing carriage along a path in one direction at a specified rate of travel and for returning the carriage in the opposite direction at a substantially higher rate of travel.
  • the mechanism includes a rotating shaft having helical grooves running axially therealong in both directions, one groove being of a certain depth. and the other groove being of a lesser depth.
  • a drive pin rides in the deeper groove along the rotating shaft to move the carriage at the specified rate in the printing operation thereof, and the pin rides in the shallow groove to provide a positive return for the carriage at the higher rate in the nonprinting, or return-to-start operation thereof.
  • Rightand left-hand threaded shafts have also been used in clutchtype control mechanisms to effect engagement and disengagement of a driving shaft and a printing-mechanism driven shaft, or to provide forward and reverse rotation of such a driven shaft.
  • a threaded rod or shaft which carries a typing head in the form of a wheel having characters thereon located in a helical path, wherein the shaft and the wheel are rotatingly driven and the carriage is moved across the paper as typing progresses, with the carriage being spring returned at the end of the line, all as shown in US. Pat. No. 2,843,243, which issued July l5, I958, on the application of Earl E. Masterson.
  • the prior art shows a printing arrangement for high-speed teleprinters which includes a spindle shaft having two endless superimposed worm gears for printing and for return operations of a carriage, as taught in US. Pat. No. 3,167,166, which issued Jan. 26, 1965, on the application of Werner Schiebeler. And finally, the concept of a rotatable shaft having a helical groove with varying pitch for start, print, and reverse operations of the carriage with spring return thereof is shown in U.S. Pat. No. 3,406,625, which issuedOct. 22, 1968, on the application of Leland D. Chamness and Andre F. Marion.
  • the present invention relates to a carriage drive mechanism and more particularly to a positive drive for moving the printing member in both the printing and nonprinting operations.
  • THe mechanism is especially applicable to high-speed printers capable of laying down a plurality of character imprints per second; for instance, in the range of 30 to 50. It is, of course, realized that at these speeds the transversing movement of the carriage across the machine must be even, positive, and controlled in such a manner as to provide a clear record of the input information.
  • the mechanism includes a drive shaft having a multiple-tum cylindrical cam with both a right-hand groove and a left-hand groove, one groove being provided with a greater depth than the other.
  • a drive shaft having a multiple-tum cylindrical cam with both a right-hand groove and a left-hand groove, one groove being provided with a greater depth than the other.
  • At one end of the cam is an idling groove joining with a start portion groove, which, in turn, joins with a print portion groove of a constant pitch and which is substantially the length of the cam.
  • a reverse portion groove which joins with a return groove of lesser depth than that of the print groove.
  • the return groove also substantially the length of the cam, is of increased pitch to propel the carriage at an increased rate of travel back to the idle portion groove.
  • the cam follower is a drive pin supported from the carriage device and having a specially shaped tip for riding in the deeper grooves during printing operation of the carriage device and for crossing over the deeper grooves when riding in the lesser depth grooves during the return trip of the carriage within the cycle.
  • the principal object of the present invention is to provide a drive mechanism for a printing machine that positively drives the carriage in both the printing and the nonprinting operations.
  • Another object of the present invention is to provide a cam shaft having deeper grooves, for accepting a drive pin follower in the carriage printing operation, and shallow grooves, for acceptin g the follower in the carriage nonprinting operation.
  • a further object of the present invention is to, provide a mechanism having cooperating cam and follower means for driving a carriage at a specified rate of travel in one direction and for positively returning the carriage at an increased rate of travel in the reverse direction.
  • An additional object of the present invention is to provide varying pitch cam means for smooth transition of the carriage during its travel from start to print, from print to reverse, from reverse to return, and from return to start operational positions.
  • FIG. I is a top plan view of part of a printing machine incorporating the present invention.
  • FIG. 2 is a front elevational view of the structure shown in FIG. 1;
  • FIG. 3 is a view, in partial section, taken on the line 3-3 of FIG. 2;
  • FIG. 4 is a fragmentary view of the specially shaped carriage drive pin
  • FIG. 5 is an end view ofthe drive pin of FIG. 4.
  • FIGS. I and 2 there is shown part of a printing apparatus which includes a preferred embodiment of the present invention, the apparatus having side frames or plates 10 and 12 spaced from each other to provide support for a platen I4 rotatably carried therebetween, and also to provide support for a drive mechanism, generally designated as I6, extending across the machine and parallel. to the platen I4.
  • the drive mechanism 116 includes a cylindrical shaft 18 suitably journaled by means of bearing hubs 20 and 22 secured to the side plates 10 and 12.
  • the shaft 13 is caused to be rotated by means of a pulley 23 secured to a reduced end portion of the shaft 18, there being a belt 24 around the pulley 23 for driving the shaft, which belt 24 is connected to an electric motor (not shown).
  • a carriage 26 encircles the shaft 18 and is arranged, through use of a guide bushing 27 (FIG. 3), for sliding movement therealong, the carriage 26 including typing or printing mechanism 28, which may take the form of a bar printer arranged for striking against the platen M, as shown, or a type hammer arranged for striking against a typewheel without the need of a platen-again of well-known construction.
  • typing or printing mechanism 28 may take the form of a bar printer arranged for striking against the platen M, as shown, or a type hammer arranged for striking against a typewheel without the need of a platen-again of well-known construction.
  • paper or other record material 30 (FIG. 3) along with carbon paper, if required, runs in a path between the platen M and the printer 28 as the carriage 26 is moved along the shaft 18 during the printing operation.
  • the shaft llll contains camming grooves for a portion therealong, beginning with an annular groove 35 near the right-hand end thereof (FIG. 2), which groove 35 is termed an idling groove, for receiving one end of a drive pin 36 when the shaft 118 is rotating without the printing operations being performed; that is, the carriage 26 being in a rest position when the drive pin 36 is riding in the groove 35.
  • a variable-pitch groove 38 Connected with the idling groove 35 and with a drive or printing groove 37 is a variable-pitch groove 38 (FIG. 2), in which the drive pin 36 rides at the beginning of printing operations, the groove 38 passing from the idiing groove 35 to a deeper level to connect with the deeper printing groove 37.
  • the printing groove 37 extends a major distance along the shaft 18 in continuous helical fashion, the groove 37 being relatively deep to insure that the end of the pin 36 is sufficiently engaged to ride therein for the purpose of driving the carriage 26 along the platen l4.
  • the deep printing groove 37 ramps radially' outwardly in a reverse portion groove 41 to connect with a return groove 39, which is not as deep as the printing groove 37 but which has a pitch approximately four times that of the printing groove 37.
  • the reverse portion groove 41 steers the drive pin 36 from the printing groove 37 to the return groove 39 by simultaneous deceleration and ramping from one level to another.
  • the shallow return groove 39 passes through a variable-pitch portion and into the idling groove 35, which, as seen in FIG. 2, is deeper than the return groove 39. It is thus seen that the drive and return grooves actually constitute an endless cam on the shaft 18.
  • the drive pin 36 is slidably contained within the carriage 26, with the slidable movement being controlled by means of a pivoted hammer 45 actuated by an electromagnet 46, and with a detent ball 47 engaging with one of two annular grooves 48, 49 and properly tensioned therein by a spring 50 and an adjusting screw 51.
  • the carriage 26 is carried along and supported from the shaft 18 and is maintained in alignment and orientation by means of rollers 55 and 56 riding along a support shaft 57 (FIG. 3), the roller 56 being adjustable to maintain proper spacing and evenness of the carriage 26 in relation to the paper 30 and the platen l4.
  • This structure readily enables the pin 36 to ride in the endless groove and to cross over the intersecting portions of the deep and shallow grooves 37 39 respectively, in its to-and-fro travel in the carriage printing and nonprinting operations.
  • the round body of the pin 36 enables it to turn within the'carriage 26 as the pin tip portion 58 is guided by the various shaft grooves.
  • a permanent magnet may be fixed to the cam shaft 18, and a stationary reed switch or other sensing device, familiar to those skilled in the art, may be positioned nearby to providean indication of the start position of the shaft 18, so as to properly engage the drive pin 36 therewith upon receipt of the print signal. Since the drive pin 36 is round, it can readily turn to enable the tip portion 58 to follow the path of the grooves 37, 39 in the variable-pitch portions, portions 38 at one end of the shaft between the idle position and the printing position, and portion 41 at the other end of the shaft 18 between the printing position and the return position.
  • the carriage 26 is moved along the platen 14 at a constant rate of travel until the drive pin 36 comes to the decelerate and reverse portion groove 41, which also employs the variable pitch in ramping from the drive or printing groove 37 to the return groove 39.
  • a reed switch or like device may provide indication to stop the printing cycle in readiness for the reversing operation.
  • the tip portion 58 continues to ride in the reverse groove 41 as it ramps outwardly to the return groove 39, the drive pin 36 being slidably moved downwardly away from the center of the shaft 18 and the hammer 45 being pivoted to the nonprinting position (FIG.
  • the reverse and accelerate groove 41 is, of course, likewise of a variable pitch in connecting with the return groove 39 of increased pitch to speedily move the carriage 26 back to the starting position.
  • the return groove 39 drives the carriage 26 in a positive manner and at a constant speed to the decelerate portion of said groove 39, which, again, is of variable pitch and which connects with the idling groove 35.
  • the variable pitch portions of the grooves 37, 39 at each end thereof enable the drive pin 36 to pass from one groove portion to another with minimum jerking and provide smooth travel for the carriagc 26 during the printing cycle and the return cycle of operation thereof.
  • the instant design of the drive or cam shaft 18 permits positive control of the carriage 26 throughout the following phases of a complete cycle: start and accelerate, print, decelerate and reversal and accelerate, return, decelerate, and idle.
  • the electromagnetically actuated hammer 45 depresses the drive pin 36 against the bottom of the'idle position groove 35, which movement of the pin 36 into the deeper portion of the groove 39 causes the detent ball 47, under emergence of the spring 50, to engage the pin groove 49 and fix the drive pin 36 at this deeper level and thereby guide the pin 36 into the variable-pitch portion 38 of the deeper groove 39, which causes the printing mechanism 28 carrying carriage 26 to be accelerated up to printing speed.
  • This start and accelerate portion of the cycle occurs in less than one revolution of the drive shaft 18.
  • the printing phase of the cycle occurs as soon as the constant pitch portion of the groove 37 has been reached by the drive pin 36.
  • the carriage speed during the printing operation depends upon the rotational speed of the shaft 18 and the pitch of the groove 37, which are set at predetermined values, and this speed is maintained for substantially the length of the grooved portion of the drive shaft 18.
  • the drive pin 36 follows the variable pitch of the groove to decelerate the carriage 26 to zero lateral movement and then passes into the oppositely turned groove 39 with the variable pitch to accelerate the carriage 26 to the higher return speed. Simultaneously, the depth of the groove 41 decreases at a given rate to automatically guide the drive pin 36 into the shallower groove 39 on the drive shaft 18 while maintaining a positive control for reversal of the carriage 26. Also, during this time, the drive pin 36 is slidably moved within the carriage 26 where the detent ball 47 seats in the groove 48 for the return trip.
  • Return of the carriage 26 can be set at the same rate as the printing portion of the cycle, whereby the printing and return grooves 37 39 would have the same pitch, thus simplifying the design of the drive shaft 18 in the use of identical rightand left-hand grooves.
  • the return pitch is approximately four times that of the printing pitch.
  • the drive pin 36 again follows the variable pitch of the groove 39 to decelerate the carriage 26 smoothly to rest at the idle position, wherein the pin 36 enters the continuous annular groove 35, to run in a path perpendicular to the drive shaft axis, and wherein both the right-hand and the left-hand grooves 37, 39 pass and change in depth.
  • the carriage 26 remains idle in this position while the shaft 18 continues to rotate until such time as the drive pin 36 is moved to the deep portion of the groove 37 for another printing cycle.
  • a drive mechanism comprising a frame, a rotating cam means carried by theframe, a carriage movable along the cam means in a cycle of operation, said cam means having an annular groove at one end thereof for idle operation of the carriage, a first helical groove connected with the annular groove and running along the'cam means for advancing the carriage in one direction, and a second helical groove of lesser depth connected with the first helical groove and running along the cam means for returning the carriage in the opposite direction, follower means engageable with the cam means for positive driving of the carriage from an idle position through an advance and return cycle of operation, means for moving the follower means from an idle position in the annular groove into the first helical groove for driving the carriage in the advance portion of the cycle, and means for reversing the direction of drive of the carriage whereby the follower means is moved from the first helical groove to the second helical groove to be guided at the lesser depth for driving the carriage in the return portion of the cycle back to the idle position.
  • said driving means comprising a rotating cam member supported from the apparatus, a drive pin carried by the carriage and engageable with the cam member throughout the cycle of operation, said cam member having an annular groove at one end thereof and an endless helical groove of a predetermined depth runningalong the cam member in one direction from said annular groove and of lesser depth running along the cam member in the other direction to said annular groove, means for moving the drive pin at the start of a cycle of operation from the annular groove into the endless groove of predetermined depth for advancing the carriage in said one direction, and means for moving the drive pin from the groove of predetermined depth into the groove of lesser depth for returning the carriage in said other direction and positioning the drive pin for return to the annular groove at the end of the cycle of operation.
  • cam member includes a variable pitch groove connecting the annular groove with the groove of a predetermined depth.
  • a drive mechanism for a high-speed .printer having a frame, a platen rotatably supported from the frame, a carriage movable along the platen in a cycle consisting of printing and return portions of operation, and printing mechanism carried by the carriage and capable of imprinting on the platen during at least the printing portion of the cycle, said drive mechanism comprising a continuously rotating cam member supported from the frame and having a deep helical groove extending along the cam member in one direction and a shallow helical groove extending in the opposite direction, an annular groove at one end of the cam member for idle operation of the carriage and a variable-pitch groove connecting the annular groove with the deep helical groove, a drive element guidable in the annular groove during idle operation of the carriage and engageable with the helical grooves throughout the cycle of operation, means for moving the drive element from the annular groove along the variable-pitch groove and into the deep helical groove for driving the carriage in advancing manner during the printing portion of the cycle, and means for moving the drive element from the
  • the means for moving the drive element from the deep helical groove into the shallow helical groove includes a variable-pitch reverse groove for automatic transferring of the drive pin from one to the other groove.

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  • Character Spaces And Line Spaces In Printers (AREA)
US868779A 1969-10-23 1969-10-23 Carriage drive mechanism Expired - Lifetime US3628645A (en)

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520541A1 (de) * 1974-05-10 1975-11-20 Olivetti & Co Spa Druckanordnung mit sich bewegendem druckkopf
US3929215A (en) * 1973-10-12 1975-12-30 Matsushita Electric Ind Co Ltd Printing mechanism
US3945481A (en) * 1974-05-08 1976-03-23 Teletype Corporation Resiliently mounted drive nut and carriage assembly
US3949851A (en) * 1975-01-24 1976-04-13 Victor Comptometer Corporation Motion translation means for high speed printer print head
US4003310A (en) * 1975-05-07 1977-01-18 The Dillon Electric & Machine Co. Control apparatus for gripper finger shaft for printing press
USRE29832E (en) * 1973-10-12 1978-11-14 Matsushita Electric Industrial Co., Ltd. Printing mechanism
US4218151A (en) * 1976-10-14 1980-08-19 Lrc, Inc. Serial impact calculator printer
WO1981001871A1 (en) * 1979-12-31 1981-07-09 R Richter Mechanism for controlling the operation of machines
US4368994A (en) * 1976-07-14 1983-01-18 The Singer Company Single servo driven printer
US4379646A (en) * 1979-03-26 1983-04-12 Kabushiki Kaisha Daini Seikosha Paper feed roll rotated by print head carrier movement
US4386564A (en) * 1980-02-14 1983-06-07 Epson Corporation Serial printer
US4420269A (en) * 1981-03-27 1983-12-13 Triumph-Adler A.G. Fur Buro- Und Informationstechnik Device for lifting the printing head off the platen
US4436031A (en) 1980-12-27 1984-03-13 Alps Electric Co., Ltd. Serial printer
US4512675A (en) * 1979-08-20 1985-04-23 Alps Electric Co., Ltd. Serial printer
EP0139096A1 (en) * 1983-08-12 1985-05-02 International Business Machines Corporation Position tracking pulse emitter
US4613245A (en) * 1983-08-22 1986-09-23 Seikosha Co., Ltd. Device for controlling the carriage return of a lead screw driven printing head
US4744681A (en) * 1987-04-01 1988-05-17 Sheldon Dunstan P Form printer
US4960338A (en) * 1987-04-01 1990-10-02 Sheldon Dunstan P Dual printer system
EP0375407A3 (en) * 1988-12-21 1991-07-03 Canon Kabushiki Kaisha Recovery mechanism of an ink jet recording apparatus
US5205215A (en) * 1991-03-20 1993-04-27 A.M. International, Inc. Oscillating roller mechanism for printing or duplicating machines
US5651396A (en) * 1995-03-09 1997-07-29 National Science Council Variable pitch lead transmission mechanism for weft gripper strap drive
US20110284338A1 (en) * 2009-02-16 2011-11-24 Corcost Limited Arrestor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5492407A (en) * 1977-10-04 1979-07-21 Letraset International Ltd Apparatus for forming sign

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DE549302C (de) * 1929-04-07 1932-04-25 Siemens Schuckertwerke Akt Ges Selbsttaetige Steuereinrichtung
US2321828A (en) * 1941-11-24 1943-06-15 Lane Motors Inc Compressor
US2441596A (en) * 1945-09-01 1948-05-18 Bell Telephone Labor Inc Mechanism for adjusting the amount of travel of riders on lead screws
US2470888A (en) * 1944-10-28 1949-05-24 Henry M Unsehuld Deep well pump
US2578771A (en) * 1948-10-28 1951-12-18 Zint George Typewriter for writing continuously in opposite directions
US2701632A (en) * 1953-08-05 1955-02-08 Zint George Variable spacing feed mechanism for typewriters and other machines
US2843243A (en) * 1955-08-09 1958-07-15 Sperry Rand Corp Printing device
US2872825A (en) * 1954-08-04 1959-02-10 Calvin K Clauer Facsimile scanner
US2894398A (en) * 1954-09-10 1959-07-14 David W Van Story Drive mechanism
US3080765A (en) * 1960-03-04 1963-03-12 Warner Swasey Co Device for actuating a movable member
US3167166A (en) * 1960-04-07 1965-01-26 Int Standard Electric Corp Printing arrangement for high-speed teleprinters
US3324240A (en) * 1963-05-06 1967-06-06 Scm Corp Telegraphic progressive printing system
US3406625A (en) * 1966-02-18 1968-10-22 Friden Inc Driving means for high-speed printing apparatus

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE549302C (de) * 1929-04-07 1932-04-25 Siemens Schuckertwerke Akt Ges Selbsttaetige Steuereinrichtung
US2321828A (en) * 1941-11-24 1943-06-15 Lane Motors Inc Compressor
US2470888A (en) * 1944-10-28 1949-05-24 Henry M Unsehuld Deep well pump
US2441596A (en) * 1945-09-01 1948-05-18 Bell Telephone Labor Inc Mechanism for adjusting the amount of travel of riders on lead screws
US2578771A (en) * 1948-10-28 1951-12-18 Zint George Typewriter for writing continuously in opposite directions
US2701632A (en) * 1953-08-05 1955-02-08 Zint George Variable spacing feed mechanism for typewriters and other machines
US2872825A (en) * 1954-08-04 1959-02-10 Calvin K Clauer Facsimile scanner
US2894398A (en) * 1954-09-10 1959-07-14 David W Van Story Drive mechanism
US2843243A (en) * 1955-08-09 1958-07-15 Sperry Rand Corp Printing device
US3080765A (en) * 1960-03-04 1963-03-12 Warner Swasey Co Device for actuating a movable member
US3167166A (en) * 1960-04-07 1965-01-26 Int Standard Electric Corp Printing arrangement for high-speed teleprinters
US3324240A (en) * 1963-05-06 1967-06-06 Scm Corp Telegraphic progressive printing system
US3406625A (en) * 1966-02-18 1968-10-22 Friden Inc Driving means for high-speed printing apparatus

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE29832E (en) * 1973-10-12 1978-11-14 Matsushita Electric Industrial Co., Ltd. Printing mechanism
US3929215A (en) * 1973-10-12 1975-12-30 Matsushita Electric Ind Co Ltd Printing mechanism
US3945481A (en) * 1974-05-08 1976-03-23 Teletype Corporation Resiliently mounted drive nut and carriage assembly
US4285606A (en) * 1974-05-10 1981-08-25 Ing. C. Olivetti & C., S.P.A. Arrangement for driving a printing head along a printing line
US4034842A (en) * 1974-05-10 1977-07-12 Ing. C. Olivetti & C., S.P.A. Arrangement for driving a printing head along a printing line
DE2520541A1 (de) * 1974-05-10 1975-11-20 Olivetti & Co Spa Druckanordnung mit sich bewegendem druckkopf
US3949851A (en) * 1975-01-24 1976-04-13 Victor Comptometer Corporation Motion translation means for high speed printer print head
US4003310A (en) * 1975-05-07 1977-01-18 The Dillon Electric & Machine Co. Control apparatus for gripper finger shaft for printing press
US4368994A (en) * 1976-07-14 1983-01-18 The Singer Company Single servo driven printer
US4218151A (en) * 1976-10-14 1980-08-19 Lrc, Inc. Serial impact calculator printer
US4379646A (en) * 1979-03-26 1983-04-12 Kabushiki Kaisha Daini Seikosha Paper feed roll rotated by print head carrier movement
US4512675A (en) * 1979-08-20 1985-04-23 Alps Electric Co., Ltd. Serial printer
WO1981001871A1 (en) * 1979-12-31 1981-07-09 R Richter Mechanism for controlling the operation of machines
US4570500A (en) * 1979-12-31 1986-02-18 Richter Robert A Mechanism for controlling the operation of machines
US4386564A (en) * 1980-02-14 1983-06-07 Epson Corporation Serial printer
US4436031A (en) 1980-12-27 1984-03-13 Alps Electric Co., Ltd. Serial printer
US4420269A (en) * 1981-03-27 1983-12-13 Triumph-Adler A.G. Fur Buro- Und Informationstechnik Device for lifting the printing head off the platen
EP0139096A1 (en) * 1983-08-12 1985-05-02 International Business Machines Corporation Position tracking pulse emitter
US4613245A (en) * 1983-08-22 1986-09-23 Seikosha Co., Ltd. Device for controlling the carriage return of a lead screw driven printing head
US4744681A (en) * 1987-04-01 1988-05-17 Sheldon Dunstan P Form printer
US4960338A (en) * 1987-04-01 1990-10-02 Sheldon Dunstan P Dual printer system
EP0375407A3 (en) * 1988-12-21 1991-07-03 Canon Kabushiki Kaisha Recovery mechanism of an ink jet recording apparatus
EP0589541A1 (en) * 1988-12-21 1994-03-30 Canon Kabushiki Kaisha Recovery mechanism and ink jet recording apparatus equipped therewith
US5757397A (en) * 1988-12-21 1998-05-26 Canon Kabushiki Kaisha Recovery mechanism and ink jet recording apparatus equipped therewith
US5205215A (en) * 1991-03-20 1993-04-27 A.M. International, Inc. Oscillating roller mechanism for printing or duplicating machines
US5651396A (en) * 1995-03-09 1997-07-29 National Science Council Variable pitch lead transmission mechanism for weft gripper strap drive
US20110284338A1 (en) * 2009-02-16 2011-11-24 Corcost Limited Arrestor

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Publication number Publication date
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