US3602355A - Apparatus for intermittent transport of a record carrier - Google Patents

Apparatus for intermittent transport of a record carrier Download PDF

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Publication number
US3602355A
US3602355A US828245A US3602355DA US3602355A US 3602355 A US3602355 A US 3602355A US 828245 A US828245 A US 828245A US 3602355D A US3602355D A US 3602355DA US 3602355 A US3602355 A US 3602355A
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United States
Prior art keywords
cam
transporting
control
blocking
operating
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Expired - Lifetime
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US828245A
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English (en)
Inventor
Alfred Hesse
Wolfgang Bindel
Heinrich Sicking
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.)
Olympia Werke AG
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Olympia Werke AG
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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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/76—Line-spacing mechanisms
    • B41J19/78—Positive-feed mechanisms
    • B41J19/80—Pawl-and-ratchet mechanisms
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/02—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier having longitudinal dimension comparable with transverse dimension, e.g. punched card
    • G06K13/07—Transporting of cards between stations
    • G06K13/077—Transporting of cards between stations with intermittent movement; Braking or stopping movement

Definitions

  • Transporting oscillations of the operating means can be blocked by control means so that the operating means performs idle movements during which the record carrier is not transported.
  • the transporting means include a gear and a printing roller mounted on a rocking member operated by an endless cam track, and data imprinted on a record carrier can be read due to the turning of the transporting means.
  • lt is one object of the invention to provide an apparatus for intermittent transport of a record carrier in which the time periods between two movements of the record carrier are varied by control means in an extremely simple manner.
  • Another object of the invention is to provide an apparatus for intermittent transport of a record carrier which is inexpensively manufactured, requires little space, and operates reliably.
  • an embodiment of the invention comprises transporting means for transporting a record carrier in a transporting direction; operating means for the transporting means including an operating member, first and second cam followers connected with the same, coupling means connected with the same, and mounting means for mounting the operating member for movement in the transporting direction, and alsofor movement in a coupling direction transverse to the transporting direction between an inoperative position and a coupling position coupling by said coupling means with the transporting means for movement in the transporting direction; drive means including a first endless cam track engaging the first cam follower for moving the operating means in the coupling diection, and a second endless cam track for moving the operating means in the transporting direction; and control means operable between at least one blocking position engaging the operating means for blocking movement of the same in said transporting direction, and a releasing position in which the second cam track moves the second cam follower with the operating means in the transporting direction.
  • the first endless cam track preferably surrounds the second endless cam track, and these.
  • cam tracks may be provided on the same lateral surface of a rotary cam, or one of the endless cam tracks may be provided on the lateral surface, and the other on the peripheral surface of a cam.
  • the control means includes a blocking member which is movable between the releasing and blocking positions, and cooperates with the operating member.
  • the drive shaft of the cam can be arrested directed when the operating member has moved out of the coupling position so that the respective turning angle of the cam, which corresponds to the movement of the operating member in the coupling direction, can be arranged to fall into the starting phase of the drive motor.
  • the first working stroke of the operating member is substantially carried out in a period of time during which the second and all following strokes of the operating member would take place if one of the transporting movements of the operating member would be started, or stopped, while the drive motor rotates at full rotary speed. This may be done, for example, to utilize the maximal possible operating frequency of the apparatus.
  • control means include a-blocking member which is moved between blocking and releasing positions by a control cam portion which is connected by a shiftable control member with the blocking member, when release of the operating member by the blocking member is necessary.
  • control cam portion which is connected by a shiftable control member with the blocking member, when release of the operating member by the blocking member is necessary.
  • the endless cam track by which transporting movements are controlled, has a greater part thereof extending along acircle for guiding the respective cam follower in the initial positions of the operating member in which the operating member is blocked by the blocking member, and cannot be displaced by a spring connected with the same.
  • the operating member is made ineffective when blocked since it is mounted on a journal carried by a mounting lever which is biassed by a spring.
  • the operating member depending on operation or nonoperation of the blocking member makes selectively one of two different angular movements, or more than one angular movement during each revolution of the cam for transporting the record carrier. This is accomplished in accordance with the invention by the provision of a side track which bypasses a portion of the cam track by which the transporting movements of the operating member are controlled.
  • a plurality of transporting movements can be obtained during each revolution of the cam by composing the respective cam track of several portions which cause a reciprocating movement of the operating member.
  • the transport of the record carrier is effected either by a dwell on the bypassed portion of the cam track, or by the dwell of the side track.
  • the side track follows a dwell in the preceding portion of the cam track so that the movement of the transporting means is caused either by the dwell of the cam track, or by the dwell of the cam track and by the dwell of the side track.
  • the transporting means includes a cylindrical printing roller which is mounted on a rockable support operated by another endless cam track
  • the arrangement is such that imprinted data can be read on the record carrier due to turning of the transporting means
  • the operational speed can be increased by carrying out simultaneously the angular stroke of the operating member by which the record carrier is transported, and the movement of the transporting means of the carrier required for the receiving of data.
  • the angular movement of the transporting means of the record carrier to its second position, and the simultaneous first angular movement of the operating member for transporting the record carrier are effected by springs which become operative when the respective blocking members move to the releasing position while the data received by at least one record carrier can be inspected in the initial position of rest of the transporting means of the record carrier.
  • the rockable support on which a transporting means in the form of a gear and printing roller is mounted is advantageously oscillated by an associated cam track and cam follower to move at at least the same angular speed asthe operating member while the return of the rockable support is effected by the cam track associated therewith against the action of a spring.
  • FIG. 1 is a fragmentary elevation illustrating the first embodiment of the invention, and including a schematic developed view of a cam track;
  • FIG. 1a is a diagram illustrating the displacement of the transporting means during one revolution of the drive means shown in FIG. 1;
  • FIG. 2 is a fragmentary elevation illustrating a modified construction of the embodiment of FIG. 1, and including a schematic developed view of a cam track;
  • FIG. 2a is a diagram illustrating angular displacements of the transporting means during one revolution of the drive means shown in FIG. 2;
  • FIG. 3 is an elevation illustrating another embodiment of the invention, and including a schematic developed view of a cam track; 1 1
  • FIG. 3a is a schematic view illustrating the displacement of the transporting means during one revolution of the drive means shown in FIG. 3;
  • FIG. 4 is a fragmentary elevation illustrating another embodiment of the invention.
  • FIG. 4a is a diagram illustrating the displacement of the transporting means during one revolution of the drive means shown in FIG. 4;
  • FIG. 5 is an elevation illustrating a preferred embodiment of the invention.
  • FIG. 5a is a diagram illustrating angular displacements of v DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • an operating member 13 is mounted on a stationary journal 22 which is located in a slot 19 of an operating member 13 so that the same is turnable in the direction x, but also shiftable in a transverse direction indicated by arrows y between the illustrated inoperative position, and a coupling position in which a coupling portion 17 at the end of operating member I3 engages a corresponding recess in a rack portion of a transporting means 9 which transports a record carrier, not illustrated.
  • a spring 37 acts on lever arm 16 of operating member 13 and biases the same to turn in counterclockwise direction until abutting with the end 7 portion 36 on a blocking shoulder 34 of a blocking member 27 which is an angular lever mounted on a pivot 28 for rocking movement, and has an arm 29 biassed by spring 30 to abut a stop 31, and another arm 32 cooperating with a reciprocable control member 33 which has an inoperative position shown in solid lines, and an operative position 33' located in the path of, and engaged by the control cam portion 8 during rotation of cam means 2 with shaft 1.
  • control cam portion 8 engages control member 33 in the position 33, motion is transmitted to the arm 32 of blocking member 27, and the same is turned from the blocking position illustrated in FIG. 1 to a releasing position in which the blocking shoulder 34 releases the end portion 36 of operating member 13 so that the same can be turned by spring 37 in counterclockwise direction.
  • the slot I9 is surrounded by a collar 18 which serves as a first cam follower cooperating with the peripheral first cam track 7 so that upon rotation of cam means 2, operating member I3 is reciprocated in the direction of the arrow y between the illustrated inoperative position and the coupling position in which coupling portion 17 engages rack portion 10.
  • the lever arm I4 of operating member 13 has a second cam follower I5 which is urged by spring 37 into engagement with the inner second endless cam track 3 which has such a shape that operating member 13 is oscillated in the transporting direction 1: when blocking member 27 is shifted by operation of control member 33 to a position releasing end portion 36 of operating member 13.
  • Oscillating movement of operating member 13 will effect movement of transporting means 9 in the transporting direction indicated-by an arrow 2 whenever operating member 13 is placed by cam track 7 and cam follower 18 in the coupling position engaging a recess in transporting means 9 by coupling portion 17.
  • FIG. 1a illustrates the displacement of transporting means 9 in the transporting direction during a revolution of cam means 2, and in the corresponding time period 1.
  • FIG. 2 is similar to the embodiment of FIG. I, but in addition to the inner cam track 3, a side track 6 is provided communicating with cam track 3.
  • Developed views of tracks 3 and 6 are schematically shown at 103 and 106.
  • Blocking member 27 is provided with a second blocking shoulder 39 in addition to blocking shoulder 34, and control member 33 is movable to a first control position 33' and further to a second control position 33".
  • a modified transporting means in the form of a gear 11 having gear teeth 10a on a shaft 12 cooperates with a coupling gear segment 17a at the end of operating member I3.
  • operating member 13 In the position shown in FIG. 2, operating member 13 is urged by spring 37 to its normal inoperative position in which mounting journal 22 abuts one end of.s lot I9, and end portion 36 abuts blocking shoulder 34 of blocking member 27. Since in this position, cam follower 15 cannot follow can track 3, operating member 13 reciprocates only in the coupling direction between the illustrated inoperative position and a coupling position in which gear segment 17a is in a coupling position meshing with gear teeth 10a of transporting gear 11 which is not transported since operating member 13 cannot perform an oscillating movement about journal 22. Cam track 3 is again constructed to move end portion 36 slightly away from blocking shoulder 34 during the idle reciprocation of operating member 13.
  • blocking member 27 is connected with control cam portion 8 by control member 33, and consequently displaced to a position in which shoulder 34 releases end portion 36 of operating member 13 at the moment R indicated in FIG. 2a, and from the this moment on, can follower 15 can follow cam track 3 under the action of spring 37 until blocked by a second blocking shoulder 39 of blocking member 27. Since transporting movement of operating member I3 in the direction of the arrow X is thus limited to a small angle a, cam follower 15 cannot enter side cam track 6, and transporting gear 11 is turned by operating member I3 in its coupling position the same angle a for transporting the record carrier a corresponding small distance.
  • Cam means 2 also has a control cam projection 8a cooperating with a control member 33a which is axially movable between an inoperative position, not shown, and the control position 33' which is different from the construction of the embodiment of FIGS. 1 and 2 where control member 33 moves in substantially tangential direction in relation to cam means 2.
  • Operating member 13a is formed with a slot 19 through which a journal pin 21 passes which is secured to a mounting lever pivotally supported on a stationary pivot 22.
  • Mounting lever 20 has a projection 26 on an arm 24 which is connected by a spring with a stationary abutment member 35 which is engaged by an abutment shoulder 23 of mounting lever 20 under the action of spring 25.
  • Transporting means 9 is constructed as a rack bar having a rack portion 10 as the embodiment of FIG. 1, and the rack portion 10 cooperate with a coupling portion 17 on the operating member 13a which carries a cam follower 18a guided in the cam track 4a and a cam follower 15a guided in cam track 3a.
  • Stop portion 31 of mounting lever 20 cooperates with a blocking shoulder 34 on lever arm 29 of blocking lever 27a which is connected by spring to the stationary abutment member 35.
  • cam means 2 When cam means 2 is rotated, and control member 33a is in an axially displaced inoperative position located outside of the plane of cam portion 8a and arm 32a of blocking lever 27a, control cam portion 8a is ineffective. Angular movement of mounting member 20 is blocked by blocking shoulder 34 of blocking member 270 which engages abutment 31 of mounting member 20.
  • Cam track 30 acts on cam follower 15a to oscillate the operating member 13a about journal pin 21 so that the transporting means 9 is shifted in the direction of the arrow 2 when operating member 130 assumes its coupling position in which, coupling portion 17 engages a recess between the rack portion 10 under the control of cam follower 18a and cam track 40.
  • control cam portion 8a When control member 330 is placed in the plane of cam portion 8a and blocking lever arm 32a, control cam portion 8a is effective to turn blocking lever 27a to a releasing position releasing mounting lever 20 so that projection 26 on arm 24 of mounting lever 20 can engage a recess between the rack portion 10 of the transporting means 9.
  • Operating member 13a assumes its coupling position in which coupling portion 17 engages a recess between the rack portion 10 under the control of cam follower 18a and cam track 4a.
  • Cam track 3a acts on cam follower 15a to oscillate the operating member 13a about coupling portion 17 and consequently mounting member 20 oscillates about stationary pivot 22 to block the transporting means 9.
  • FIG. 30 indicates that cam means 2 becomes operative at a point T after actuation of control member 330 in the inoperative position to cause displacement of transporting means 9 the distance d due to the shape of cam track 3a as indicated at 10311.
  • FIG. 4 has an outer endless cam track groove 4a, an inner endless cam track groove 3a, and a side track 6a, as also indicated in the developed diagrammatic part of FIG. 4 by the reference numerals 103a and 1060.
  • the operating member 13b has a cam follower 21' located in cam track 4a, and a cam follower 15b cooperating with'cam tracks 3a and 6a and being mounted on an arm 14 of operating member 13b which has at its other end, a gear sector 17b cooperating with the rack portion 10 of the transporting means 9.
  • a mounting lever 20 is arranged as described with reference to FIG. 3, with the exception that the end portion 20a is formed with an open slot 19a in which cam follower pin 21' is guided.
  • a blocking lever 27b is mounted on a stationary pivot 28 and has an arm 29a with an abutment shoulder 34 engaging the stop portion 31 of mounting lever 20.
  • a control member 33b is shiftable from a position 33" shown in solid lines to a position 33' and to an uppermost position not shown for connecting the control cam portion 8a with arm 32b of blocking lever 2712 so that the same releases mounting lever 20, and permits an oscillating movement of operating means 13b and 20 for the purpose of blocking transporting means 9 when gear sector 17b is in the coupling position engaging rack portion 10.
  • Control member 33b has a transversely bent portion 40 connected by a spring 38 with arm 14 of operating member 13b.
  • An abutment 39 on portion 40 of control member 33b in position 33' cooperates with an abutment portion 14a of arm 14 which limits the oscillating movement of operating member 13b when it is not desired that cam follower 15b enters cam track 6a.
  • FIG. 4a graphically illustrates the displacement of the transporting means 9 a distance d, or a distance 2 in the opposite direction, depending on the control position of control member 3312.
  • an operating member 13 as described with reference to FIG. 2, has a slot 19, a cam follower 18, an end portion 36 cooperating with the shoulder 34 of a blocking member 27, and has. a gear segment 17a cooperating with a gear 11, 10a.
  • the rotary cam means 2 is mounted on a shaft 1- and has an inner track 3 with a side track 6 on one side, as described with reference to FIG. 2, and has on the other side a cam track 5 with a side track 5a.
  • a cam portion 8 cooperates with a control member 33 which is shiftable to two control positions 33', 33" to turn blocking member 27 different angles so that in control position 33, end portion 36 releases blocking shoulder 34 and is engaged by blocking shoulder 39, by which end portion 36 is released in the second control position 33".
  • a rocking member 42 is mounted on the stationary journal 22 and has one arm 42c connected by a spring 51 to a stationary point, a second arm 42 f having an end portion 42 a cooperating with a bent over lug 52 on blocking lever 27, and a third arm 42b carrying a cam follower 42c cooperating with the cam tracks 5 and 5a on the other side of cam means 2.
  • the fourth arm 42d of rocking member 42 carries shaft 12 on which transporting means 9a with gear 11 is mounted so that rocking of member 42 under the control of cam follower 420 places transporting means 9a in the position 9' shown in dash and dot lines.
  • a spring 37 connects arm 16 of operating member 13 with arm 42b of member 42.
  • Transporting means 9a is constructed as a printing roller for printing on a record carrier 41.
  • a printing wheel 44 is biassed by a spring 45 to turn to a position in which it is stopped by one pin 47 of a pin carriage 47a when printing wheel 44 is in a position in which a desired digit represented by a type face 43 is located in a printing position in relation to the printing roller 9a in the position 9'.
  • a member 46 returns all ordinal printing wheels 44 simultaneously to an initial position, and releases the same for movement to selected digital positions after setting of the pin carriage 47a in the usual manner.
  • Another record carrier 53 may be used for statistic interpretations.
  • An arresting means 54 is mounted at the end of arm 42d and has two resilient arms 54a arresting gear 11 in angular positions so that the steps which record carrier 41 is transported is accurate, and correspond to the circumferential spacing of the type faces 43.
  • a window 48 is provided in a cover 49 which has a sharp edge 50 permitting the tearing off of a record carrier sheet 41 which is removed through window 48,
  • the band shaped record carrier sheet 41 receives an imprint from type faces 43 when printing roller 9a is in the printing position 9' due to the angular displacement of rocking member 42 by cam follower 42c following cam track 5.
  • the next printing area C of record carrier 41 which is to receive an imprint, is turned by a first angular movement of operating member 13 an angular distance a by printing roller 90 in clockwise direction, and by the first angular movement of printing roller 9a to the position 9' by rocking member 42 in counterclockwise direction three angular units 01 since gear 11, 10a rolls on gear segment 170 during angular displacement of rocking member 42, as also graphically illustrated by graphs L and M in FIG. a.
  • the data transfer takes place at the point B in FIG. 5a which shows the angular displacements a and 3a in opposite directions, and equal speed in the section A.
  • the readable data on record carrier 41 are placed in a visible reading position D since printing roller 9a moves three angular displacement units a in clockwise direction, and also after each total transfer additionally, corresponding to the graph L,, due to the second angular displacement of operating member 13, three further angular units a in clockwise direction into the region of the edge 50 where the respective sheet portion can be torn off and removed through window 48.
  • the data transfer is started by rocking member 42 due to release of end portion 42a by blocking projection 52 simultaneously with the release of end portion 36 of operating member 13 by blocking shoulder 34 of blocking lever 27.
  • Apparatus for intermittent transport of a record carrier comprising. in combination, transporting means movable in a transporting direction for transporting a record carrier; operating means for said transporting means including an operating member, first and second cam followers connected with said operating member, coupling means connected with said operating member, and mounting means mounting said operating member for movement in said transporting direction, and also for movement in a coupling direction transverse to said transporting direction between an inoperative position and a coupling position coupled by said coupling means with said transporting means for movement is said transporting direction; drive cam means including a first endless can track engaging said first cam follower for moving said operating means in said coupling direction between said inoperative and coupling positions, and a second endless cam track for moving said operating means in said transporting direction; and control means operable between at least one blocking position engaging said operating means for blocking movement of said operating means in said transporting direction so that said operating means move in said coupling direction without moving said transporting means, and a releasing position in which said second cam track moves said second cam follower with said operating means in
  • said mounting means mount said operating member for rectilinear movement in said coupling direction and for angular movement in said transporting direction; and wherein said mounting means is connected with said operating member at a portion of the latter located between said second cam follower and said coupling means; wherein said cam means includes a control cam portion; wherein said control means include a blocking member movable between said releasing position and said blocking position, and a control member movable between an inoperative position, and at least one control position in which saidcontrol member is located between said control cam por tion and said blocking member so that said blocking member is moved from said blocking position to said releasing position under the control of said control cam '4.
  • said operating means include spring means acting on said operating member to bias said operating member to abut said blocking member in said blocking position; and wherein said second cam track has a substantially circular portion for guiding said second cam follower while said operating member abuts said blocking member.
  • said mounting means includes a journal; and wherein said operating member has a slot extending in said coupling direction and receiving said journal so that said operating member is mounted for rectilinear movement in said coupling direction and for angular movement in said transporting direction.
  • mounting means include a spring biassed pivotally supported mounting lever carrying said journal so that said operating member is freely movable in said transporting direction while said mounting lever turns.
  • control means is operable between two blocking positions for blocking said operating means in two different angular positions; wherein said cam means is formed with a side cam track by passing a portion of said second cam track; wherein said operating means include a spring biasing said operating member to urge said second cam follower to enter said side cam track; and wherein in one of said blocking positions said operating member is held in such a position that said second cam follower follows only said second cam track while in the other blocking position said second cam follower is free to enter said side track so that said operating member moves in said transporting direction a different distance tan during engagement only of the second cam track by said second cam follower.
  • said cam means include a control cam portion; wherein said control means include a blocking member turnable between said two blocking positions and said releasing position, a control member movable between an inoperative position and two control positions in which said control member is located between said control cam portion and said blocking member so that said blocking member is turned in the first control position from said one of said blocking positions to the other blocking position, and in said second control position from the other blocking position to said releasing position.
  • said cam means has a third endless cam track; wherein said operating member has a slot extending in said coupling direction, wherein said mounting means includes a journal located in said slot and supporting said operating member for reciprocating movement in said coupling direction and for turning movement so as to move said coupling means in said transporting direction; comprising a support member mounted for rocking movement on said journal and having a third cam follower located in said third cam track; wherein said transporting means includes a gear and a printing roller turnably supported on said support member and movable with the same between a normal position and a printing position; comprising printing wheel means having types for printing on a record carrier sup ported by said printing roller in said printing position; and wherein said control means include means for controlling the movement of said support member with said printing roller between said normal and printing positions under the control of said third cam track.
  • Apparatus as claimed in claim 15 comprising a housing having a window bounded by a cutting edge located in the proximity of said printing roller so that a record carrier is transported by the turning printing roller out of said window whereby said record carrier can be inspected through said window and torn off along said cutting edge.
  • Apparatus as claimed in claim 11 including an arresting member mounted on said support member and including two spring arms embracing a portion of said gear and engaging recesses between the teeth of said gear for arresting said gear and thereby said printing roller in all angular positions of said gear.

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US828245A 1968-06-01 1969-05-27 Apparatus for intermittent transport of a record carrier Expired - Lifetime US3602355A (en)

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DE1774373 1968-06-01

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4283149A (en) * 1979-01-24 1981-08-11 Control Commerce Ag Paper transporting device for cash registers, data processing machines or the like
US4573814A (en) * 1983-11-18 1986-03-04 Ing. C. Olivetti & C. S.P.A. Dot matrix printer
FR2570649A1 (fr) * 1984-09-26 1986-03-28 Canon Kk Appareil d'enregistrement
EP0144153A3 (en) * 1983-11-18 1987-12-02 Ing. C. Olivetti & C., S.P.A. Dot matrix printer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2153208A (en) * 1935-06-27 1939-04-04 Ibm Record controlled machine
US2390396A (en) * 1945-12-04 Accounting machine
US2667256A (en) * 1951-02-14 1954-01-26 Teletype Corp Line feed mechanism
US3217855A (en) * 1961-03-02 1965-11-16 Walther Buromaschinen G M B H Line spacing device for adding and computing machines
US3504780A (en) * 1967-03-08 1970-04-07 Siemens Ag Line shift device of electrically operated tele-communication typewriters

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2390396A (en) * 1945-12-04 Accounting machine
US2153208A (en) * 1935-06-27 1939-04-04 Ibm Record controlled machine
US2667256A (en) * 1951-02-14 1954-01-26 Teletype Corp Line feed mechanism
US3217855A (en) * 1961-03-02 1965-11-16 Walther Buromaschinen G M B H Line spacing device for adding and computing machines
US3504780A (en) * 1967-03-08 1970-04-07 Siemens Ag Line shift device of electrically operated tele-communication typewriters

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4283149A (en) * 1979-01-24 1981-08-11 Control Commerce Ag Paper transporting device for cash registers, data processing machines or the like
US4573814A (en) * 1983-11-18 1986-03-04 Ing. C. Olivetti & C. S.P.A. Dot matrix printer
EP0144153A3 (en) * 1983-11-18 1987-12-02 Ing. C. Olivetti & C., S.P.A. Dot matrix printer
FR2570649A1 (fr) * 1984-09-26 1986-03-28 Canon Kk Appareil d'enregistrement

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