EP0105844A2 - Process and transportation device for individually feeding laminar print material to an office machine - Google Patents

Process and transportation device for individually feeding laminar print material to an office machine Download PDF

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Publication number
EP0105844A2
EP0105844A2 EP83810450A EP83810450A EP0105844A2 EP 0105844 A2 EP0105844 A2 EP 0105844A2 EP 83810450 A EP83810450 A EP 83810450A EP 83810450 A EP83810450 A EP 83810450A EP 0105844 A2 EP0105844 A2 EP 0105844A2
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EP
European Patent Office
Prior art keywords
roller
gear
take
sheet
platen
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.)
Granted
Application number
EP83810450A
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German (de)
French (fr)
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EP0105844A3 (en
EP0105844B1 (en
EP0105844B2 (en
Inventor
Kurt Rünzi
Original Assignee
Kurt Rünzi
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Family has litigation
Priority to CH5863/82 priority Critical
Priority to CH586382A priority patent/CH663601A5/en
Application filed by Kurt Rünzi filed Critical Kurt Rünzi
Publication of EP0105844A2 publication Critical patent/EP0105844A2/en
Publication of EP0105844A3 publication Critical patent/EP0105844A3/en
Application granted granted Critical
Publication of EP0105844B1 publication Critical patent/EP0105844B1/en
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Publication of EP0105844B2 publication Critical patent/EP0105844B2/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/0009Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
    • B41J13/0018Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material in the sheet input section of automatic paper handling systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section

Abstract

The sheets to be labeled are fed to a platen roller (2) by two take-off rollers (15) located above a stack of supplies. The take-off rollers (15) are driven by slip-free toothed belts (14, 26) depending on the rotary movement of the platen roller (2). The sheet feed is temporarily interrupted by the take-off rollers (15) by means of a gear (31) with interrupted movement and an overrunning clutch (17). The gear (31) contains a ring gear which extends over part of the circumference of a gear wheel (28) and interacts with a pinion (38) seated on the axis (40) of the take-off rollers (15). A locking disk (34) seated on this axis (40) interacts with a cam disk (32) so that the pinion (38) can only rotate when the ring gear (28) engages with the pinion (38) in predetermined positions . This ensures a precise feed of sheets to be fed one after the other without inaccuracies being able to add up. In addition, no separate motor and no light barrier are required for the sheet feed.

Description

  • The invention relates to a method and a transport device for the single supply of impression material, in particular paper sheets to a writing or printing office machine, in particular a typewriter, according to the preamble of claims 1, 2 and 8. In some office machines, the transport takes place continuously Imprinting or printing material in roll form or with a fan fold by pin wheels engaging in side perforations. Since such edge perforations are perceived as disturbing in many cases, machines are known which separate these perforated edge strips after the inscription. This is cumbersome and requires additional work and machinery.
  • Due to the advent of automatic typewriters, there is a need for automatic feeding of single sheets, for example pre-printed letterhead, invoice forms or the like. in such machines. He meets this plan considerable difficulties, since the feed inaccuracies add up when transporting such single sheets through the machine, resulting from different sheet lengths and slippage, so that it is not possible to print a large number of sheets fed one after the other. It is already known to avoid these difficulties by scanning the position of the leading edge of the sheet in the machine. This is made more difficult by the fact that in typewriters the space for accommodating photocells or the like. is very limited and is hindered by the reciprocating stylus or carriage. For this reason, light barriers with a light beam interrupted by the sheet are practically not applicable for reasons of space. On the other hand, scanning the leading edge of the sheet by means of reflecting light rays has the disadvantage that it does not respond to colored sheets or sheets printed on the top, since the difference in brightness is often insufficient to make the photosensitive cell respond. In addition, a separate drive motor is required for the sheet feed, since the necessary movement cannot be derived from the platen roller.
  • The object to be achieved by the invention is to create an automatic single sheet feed suitable for office machines, which is particularly simple, reliable and precise and whose movement can be derived from the platen roller, so that a separate drive motor for the sheet feed is unnecessary.
  • The inventive method is in claim 1 and the inventive transport device is characterized in claims 2 and 8.
  • This makes it possible to achieve an inevitable, precise feed of the individual sheets without inaccuracies in the feed or with differences in the sheet length being able to add up. In addition, different formats can be processed without having to change the programming of the machine. In addition, no additional motor for sheet transport is required, since all movements are derived from the platen roller. Since no electrical connection is required, the device can easily be placed on the machine as a separate structural unit and removed if necessary.
  • In the drawing, an embodiment of the subject of the invention is shown. Show it:
    • 1 is a side view of the transport device with gear for generating an intermittent sheet feed movement,
    • 2 is a view of the gear for the intermittent sheet feed movement including the drive roller, in the direction of arrow F in Fig. 1,
    • 3 is a plan view of the transport device,
    • 4 is a perspective view of a one-way clutch,
    • 5 is a partial section through an overrunning clutch,
    • 6 is an exploded perspective view of the device,
    • Fig. 7 is a perspective view of the device placed on an office machine.
  • The transport device can be placed and removed as a removable unit on an office machine, in particular on a typewriter 1. For this purpose, a gear 3 sits on the shaft 4 of the platen roller 2 and is connected to the platen roller 2 of the typewriter 1 in a rotationally fixed manner. This gear 3 engages in a gear 10 belonging to the transport device and thereby effects a drive connection between the movement of the platen roller 2 and the drive movement of the transport device. The shaft 4 of the platen roller 2 is encompassed on both sides by a hook-shaped locking lever 5, so that a detachable connection between the transport device designed as a separable unit and the automatic typewriter 1 or the like. is formed. To release this connection, an operating rod 7 is moved by hand. This operating rod 7 is over a
  • Joint 75 movable with the locking lever 5. connected. A pin 74 engaging in a longitudinal slot is provided for guiding the actuating rod 7. - With a corresponding movement of the locking lever 5 by an existing at the end of the operating rod 7 finger grip 71, the shaft 4 can be released. These locking members are present at both ends of the platen roller 2.
  • The transport device contains a side plate 8 at both ends, which extend essentially in the vertical direction and are connected to one another by at least one rod-shaped strut 9. At least one rocker 13 sits on the strut 9 and serves to receive the supply stack 19 of the sheets 11 to be labeled or printed.
  • In the embodiment shown in the drawing, there are two such rockers 13 which can be pivoted about the strut 9 as an axis of rotation and can be displaced relative to one another to accommodate sheets 11 of different widths. Each of these rockers 13 includes a flat bottom 37 and a V ertikalwand 39 and is urged by a spring 53 upward. Above these two rockers 13 there is a take-off roller 15, which abuts the top sheet 11 of the supply stack in a frictional manner. Each of these take-off rollers 15 is provided with an overrunning clutch 17 according to FIG. 5, in the sense that these take-off rollers 15 can be positively driven in one direction of rotation - which corresponds to the paper feed direction C - while these drive rollers 40 are stopped when the shaft 40 is stopped 15 these can rotate freely on the top sheet 11 removed.
  • From Fig. 5, an embodiment shows such an overrunning clutch 17, together with an A bzugsrolle 15. Between the inner ring 58 and the outward ring 56 are pinch rollers 60 or clamping balls of the external ring are performed 56 depending on a curve track 64. Spring loaded Pressure pins 62 press these pinch rollers 60 in the direction against the narrower part of the cam track 64. Thus, if the shaft 40 is rotated in the direction of the arrow G, the pinch rollers 60 cause the outer ring 56 to be entrained, so that the rotary movement is transmitted from the shaft 40 the take-off roll 15 takes place. If, on the other hand, the drive of the shaft 40 is stopped, the take-off roller 15 can nevertheless rotate as a freewheel in the direction of the arrow G, since the pinch rollers 60 are located in the enlarged part of the curved tracks 64 and thereby the non-positive connection between the outer ring 56 and the inner ring 58 is interrupted.
  • The gearwheel 10, which engages in the gearwheel 3 of the platen roller 2, is rigidly connected to a first pulley 12. a first endless toothed belt 14 engages in this pulley 12 and is guided over a deflection roller 18 and a tensioning roller 16 over a second pulley 20. A third, smaller pulley 22 seated on an axis 21 is rigidly connected to this second pulley 20 and is looped around by a second endless toothed belt 26. This second toothed belt 26 leads to a fourth pulley 24, which is seated on a horizontal axis 29. Connected to this fourth pulley 24 is a toothed wheel 28, the ring gear of which only extends over part of a full circumference, preferably approximately approximately half the circumference. In addition, a cam disk 32 is rigidly attached to this fourth pulley 24. This cam disk 32 acts with a locking disk 34 together. The locking disk 34 contains one or more, in the present case three arcuate recesses, the radius of which corresponds to that of the cam disk 32. A pinion 38 is rigidly connected to the locking disk 34 and sits on the same axis of rotation 40 as the take-off rollers 15. This axis of rotation 40, the pinion 38 and the locking disk 34 are rigidly connected to one another. The pinion 38 is designed such that it comes into and out of engagement with the ring gear 28 after a predetermined, constant angle of rotation. The segment ring gear 28 together with the pinion 38, the cam 32 and the locking disk 34 forms a gear 31 with intermittent movement, in the sense that with a continuous rotation of the fourth pulley 24, the pinion 38 occurs intermittently. During the period in which this pinion 38 is not in engagement with the ring gear of the gear 28, that is to say is also not rotated, this pinion 38 is positively blocked by the arcuate recesses 36 of the locking disk 34 abutting against the larger-diameter part of the cam disk 32. If the fourth pulley 24 thus rotates due to a movement of the toothed belt 26 in the direction of rotation indicated in the direction of arrow E, this does not initially result in any rotational movement of the pinion 38, starting from the position shown in FIG. 1, since the ring gear 28 does not engage with the pinion 38. When this fourth pulley 24 moves further, the ring gear 28 finally reaches the area of the pinion 38 however, the cam plate 32 comes into such a position that the locking disk 34 is released by the cam plate 32 and the latter can execute a rotary movement together with the pinion 38. The part 35 of the cam 32 has a smaller radius than the part 42 of this cam. When the ring gear of the gear wheel 28 comes into engagement, the approximately radially extending transition section 33 of the cam disk 32 is located approximately in the middle of the adjacent arcuate recess 36 of the locking disk 34. The locking disk 34 can then rotate in the direction of arrow A. When the fourth pulley 24 continues to rotate, the pinion 38 thus executes a certain number of revolutions, which is determined by the length of the ring gear 28. Then the locking disk 34 again reaches the area 42 of the cam disk 32 with the larger radius, whereupon the pinion 38 no longer rotates, since it has reached the area of the toothless part 30. The locking disk 34 again causes the pinion 38 to be stopped in a precisely predetermined position and remains in this position while the cam disk 32 continues to rotate. The process described above is then repeated. Since the rotary movement from the platen roller 2 to the pinion 38 is thus a forced transmission by this movement being carried out via toothed wheels and / or toothed belts, a repetitive, exactly matching relative position between the disk roller 2 and the pinion 38 is ensured.
  • The transmission ratio is also selected so that the angular velocity of the platen roller 2 corresponds as closely as possible to the angular velocity of the draw-off roller 15, so that a Synchronous movement occurs when the pinion 38 is in engagement with the ring gear 28 and the paper feed speed A corresponds to the peripheral speed of the platen roller 2.
  • In order to avoid that when the platen roller 2 rotates backwards, the sheet transport members are not clocked, a one-way clutch 49 according to FIG. 4 is present between the platen roller 2 and the gear 31 with intermittent movement.
  • This one-way or driver clutch 49 is located between the second and third pulleys 20, 22. The second pulley 20 is provided with an axially or radially projecting cam 46 or pin, against which a driver projection 52 which projects radially from a driver disk 50 loosely abuts. The drive pulley 50 is connected to the third pulley 22. In order to reduce the axial length, the second pulley 20 is provided with a cylindrical recess 48, into which the driving pulley 50 projects. In the normal direction of rotation B of the second pulley - that is, in the sheet transport direction C - the driver shoulder 52 is carried along by the cam 46, so that the two pulleys 20, 22 rotate at the same speed. If, on the other hand, the second pulley 20 begins to rotate in the opposite direction, the pulley 22 stops and with it the movement-suspending gear 31 and the take-off rollers 15. Since a reverse rotation of the platen roller 2 usually only detects a few lines, for example when writing of chemical or mathematical formulas, it is sufficient that the one-way clutch only Prevents the reverse rotation of the third pulley 22 over just a single revolution.
  • Instead of between the second and third pulleys 20, 22, the one-way clutch 49 could also be arranged between other rotational transmission elements, for example between the gearwheel 10 and the first pulley 12. Furthermore, this one-way clutch 49 could also be designed as a claw clutch with great play between the intermeshing claws.
  • All pulleys 12, 20, 22, 24 are provided with recesses or teeth for the slip-free transmission of the movements by the toothed belts 14, 26.
  • Instead of pulleys 12, 20, 22, 24 and toothed belts 14, 26, the slip-free, synchronous transmission of motion could also take place by meshing gears.
  • The mode of operation of this transport device is as follows: on the two rockers 13 there is a stack of 19 individual sheets 11. The front edge of the stack 19 lies against a stop 43 which merges into an angled tab 47 at the top. Close to the front edge of the uppermost sheet 11 are the two take-off rollers 15 seated on the shaft 40. When the platen roller 2 rotates, this movement is transmitted to the shaft 40 and thus to the take-off rollers 15, provided that in the gear 31 the pinion 38 is in engagement with the ring gear of the gear 28.
  • Only the uppermost sheet is lifted from the stack 19 by corner singler 41 and transported in the direction of arrow C. This sheet is then deflected downwards by guide means and subsequently reaches the area of the motor-driven platen roller 2 where it is gripped by at least one pressure roller 44 and deflected around a curved deflection plate 45 and fed to a second pressure roller 44. After the sheet 11 is gripped in the feed gap 59 in this way, the ring gear 28 disengages from the pinion 38. The sheet 11 is now transported by the platen roller 2 by means of a stepping motor assigned to this platen roller, the pull-off rollers 15 no longer being driven are, but can rotate freely in the direction of arrow G due to the overrunning clutch 17. As soon as the front edge of the sheet 11 has reached its intended position for writing, the drive motor of the platen roller 2 is stopped. The sheet can subsequently be labeled or printed in the usual manner known per se and transported further line by line. The pull-off roller 15, which is no longer driven, only moves as long as it lies on the top sheet which has been pulled away, after which it stands still. The finished sheet 11 is then placed on the tray holder 51. After the platen roller 2 has made a predetermined number of revolutions, the ring gear 28 again engages with the pinion 38 and causes the shaft 40 and thus the take-off rollers 15 to rotate again, whereby a next sheet 11 is conveyed. The gear ratio Between the toothed wheel 3 connected to the toothed roller 2 and the fourth pulley 24 is selected so that the pinion 38 only begins to rotate when the longest sheet 11 intended for processing has got under the take-off rollers 15, so that between the first transported sheet 11 and a subsequent second transported sheet 11 there is a gap. Since an exact sequential relationship between the platen roller 2 and the take-off rollers 15 is maintained, inaccuracies cannot add up. This ensures that the same initial conditions prevail for each newly drawn sheet 11. In this way, it is possible to get by without the photocell scanning the sheet 11, since precisely defined conditions are maintained between the movement of the platen roller 2 and the sheet transport, in that there is a slip-free positive drive between the platen roller 2 and gear 31 and the gear 31 also works inevitably.
  • After the sheets 11 have been labeled, they are placed on a storage stack carried by the inclined holder 51 (FIG. 7).
  • The sheet transporter is controlled exclusively by the rotary movement of the platen roller 2. Thus, only the control device of the platen roller drive motor is to be designed in such a way that a predetermined number of turning steps have to be carried out until a next sheet 11 to be labeled again reaches the exact same starting position. The rotation assigned to a full sequence - i.e. when the whole process is repeated movement of the platen roller 2 thus corresponds to a sheet feed that is larger than the longest sheet 11 to be processed.

Claims (9)

1. A method for the individual supply of sheet-shaped impression material, in particular paper sheets (11) to a writing or printing office machine (1), in particular a typewriter, characterized in that the sheets (11) from a supply stack (19) by at least one against the Stack of stock (19) frictionally applied pull-off roller (15) are individually pulled off in the sheet feed direction (C), the pull-off roller (15) is driven by the platen roller (2) which is shorter than the feed roller (15) positively driven by the feed roller the entire length of the sheet, after gripping the sheet (11) in the draw-in gap (59), the pull-off roller (15) rotates on the pull-off sheet (11) in free-running mode by interrupting the positive drive connection between the platen roller (2) and the take-off roller (15), and only after a predetermined rotational movement of the platen roller (2) has been completed does the positive drive connection between the platen roller (2) and the take-off roller (15) be restored is set, the movement of the take-off roller (15) and the movement of the platen roller (2) being repeated for each sheet (11) to be subsequently transported in a predetermined, position-matching sequence.
2. Transport device for the single supply of sheet-shaped impression material, in particular paper sheets (11) to a writing or printing office machine (1), in particular a typewriter, with at least one take-off roller (15) for separating the sheets (11) frictionally against a supply stack (19) for transporting the sheets to a platen (2), there being a drive transmission gear (10) which meshes with a gear (3) driven by the platen (2) is determined and an overrunning clutch is present between the take-off roller (15) and its drive elements, characterized in that mechanical means (28, 30, 32, 34) are present between the platen roller (2) and the take-off roller (15) which are positive Drive connection is interrupted after a predetermined advance of the blade (11) - which is shorter than the blade length - and after a further predetermined rotary movement has been completed, the positive drive connection is restored, and drive transmission means (3, 12, 14, 20, 26, 30) are present, with which a predetermined sequential relative position between drive transmission gear (10) and take-off roller (15) can be maintained, so that with each subsequent end to be transported sheet (11) is the same starting position.
3. Transport device according to claim 2, characterized in that the means for interrupting the drive connection between the drive gear (10) or platen (2) is an automatically working mechanical gear (31) with intermittent movement, and the movement transmission between the drive gear (10) and Transmission (31) by slip-free forced rotation means (12, 14, 20, 22, 24, 26).
4. Transport device according to claim 3, characterized in that the forced means for transmitting motion between the platen (2) and gear (31) is at least one endless toothed belt (14, 26) which engages in toothed belt wheels (12, 20 22, 24).
5. Transport device according to claim 3 or 4, characterized in that the gear (31) contains a pinion (38) and a larger gear (28), the pinion (38) with a locking disc (34) is rigidly connected and the locking disc ( 34) cooperates with a cam disk (32) rigidly connected to the larger gear (28) in such a way that the pinion (38) engages with the larger gear (28) only sector by section during an entire revolution of the larger gear (28) and in Non-engagement state is secured against rotation.
6. Transport device according to claim 3, 4 or 5, characterized in that the pinion (38) with the take-off roller (15) is rotatably connected, the larger gear (28) on a sprocket extending over part of its circumference. points and in the area of the ring gear the cam (32) has a small radius than in the rest of the area.
7. Transport device according to at least one of claims 1-6, characterized in that the device can be placed and removed as an assembly on a typewriter and in the attached state the drive transmission gear (10) with a gear (3) which is seated on the shaft (40) of the platen roller and rigidly connected to it.
8. Transport device for the single supply of sheet-shaped impression material, in particular paper sheets (11) to a writing or printing office machine (1), in particular a typewriter, with at least one take-off roller (15) which frictionally abut against a stack of stocks for separating the sheets Transport of the sheets to a platen (2), wherein a drive transmission gear (10) is present, which is intended to engage in a gear (3) driven by the platen (2) and an overrunning clutch is present between the take-off roller (15) and its drive members , characterized in that between the drive transmission gear (10) and the take-off roller (15) gear means (28, 32, 34, 38) for an intermittent drive of the take-off roller (15) and also a one-way clutch (46, 52) is present, which a Transmits rotation in the paper feed direction (C), interrupts the movement in the opposite direction and the driving link (20) and the driving link (22) always have a predetermined, coincident position when transmitting power in the paper feed rotation direction.
9. Transport device according to claim 8, characterized in that the driven wheel (20) has a cam (46) and the driven wheel (22) has a driver lug (52), the driver lug (52) in the power transmission Direction (B) bears loosely against the cam (46) and the frictional connection is interrupted in the opposite direction of rotation of the driven wheel (22) (Fig. 4).
EP19830810450 1982-10-06 1983-10-04 Process and transportation device for individually feeding laminar print material to an office machine Expired - Lifetime EP0105844B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH5863/82 1982-10-06
CH586382A CH663601A5 (en) 1982-10-06 1982-10-06 Method and transport device for supplying sheet-shaped impression material to an office machine.

Publications (4)

Publication Number Publication Date
EP0105844A2 true EP0105844A2 (en) 1984-04-18
EP0105844A3 EP0105844A3 (en) 1984-06-06
EP0105844B1 EP0105844B1 (en) 1987-03-11
EP0105844B2 EP0105844B2 (en) 1992-11-11

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ID=4300561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830810450 Expired - Lifetime EP0105844B2 (en) 1982-10-06 1983-10-04 Process and transportation device for individually feeding laminar print material to an office machine

Country Status (7)

Country Link
US (1) US4544294A (en)
EP (1) EP0105844B2 (en)
JP (1) JPH0630915B2 (en)
BR (1) BR8305532A (en)
CA (1) CA1220441A (en)
CH (1) CH663601A5 (en)
DE (1) DE3370146D1 (en)

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* Cited by examiner, † Cited by third party
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DE2854695A1 (en) * 1978-01-23 1979-07-26 Rutishauser Data Ag Transport device for blattfoermige record carrier
DE2950707B2 (en) * 1979-03-20 1981-04-23 Helmut 7210 Rottweil De Steinhilber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3442814A1 (en) * 1983-11-25 1985-07-11 Silver Seiko Automatic paper transportation device
WO1985005076A1 (en) * 1984-05-02 1985-11-21 Olympia Werke Ag Drive system for different functions in typewriters or printing machines of similar design, based on the use of an electric motor
DE3442915A1 (en) * 1984-11-24 1986-06-05 Helmut Steinhilber Device for the individual feeding of sheets to the platen of an office machine

Also Published As

Publication number Publication date
DE3370146D1 (en) 1987-04-16
EP0105844A3 (en) 1984-06-06
CA1220441A (en) 1987-04-14
US4544294A (en) 1985-10-01
CA1220441A1 (en)
CH663601A5 (en) 1987-12-31
BR8305532A (en) 1984-05-15
EP0105844B2 (en) 1992-11-11
EP0105844B1 (en) 1987-03-11
JPS5987187A (en) 1984-05-19
JPH0630915B2 (en) 1994-04-27

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