EP0013288A2 - Vorrichtung zur Zuführung von Papier für eine rotierende Schreibmaschinenwalze - Google Patents

Vorrichtung zur Zuführung von Papier für eine rotierende Schreibmaschinenwalze Download PDF

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Publication number
EP0013288A2
EP0013288A2 EP79103346A EP79103346A EP0013288A2 EP 0013288 A2 EP0013288 A2 EP 0013288A2 EP 79103346 A EP79103346 A EP 79103346A EP 79103346 A EP79103346 A EP 79103346A EP 0013288 A2 EP0013288 A2 EP 0013288A2
Authority
EP
European Patent Office
Prior art keywords
plate
rollers
chassis
ball joint
axes
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.)
Ceased
Application number
EP79103346A
Other languages
English (en)
French (fr)
Other versions
EP0013288A3 (de
Inventor
Vencil Delano Engle
Raymond Michael Marowski
Edward Ellett Pollard
John Liggette Pullen
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0013288A2 publication Critical patent/EP0013288A2/de
Publication of EP0013288A3 publication Critical patent/EP0013288A3/de
Ceased 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02—Rollers
    • B41J13/036—Rollers co-operating with a roller platen
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02—Rollers
    • B41J13/076—Construction of rollers; Bearings therefor

Definitions

  • the present invention relates to the feeding of paper into typewriters and similar machines fitted with a rotating cylindrical platen (sometimes also called a printing cylinder or roller) and, more particularly, it relates to a paper feeding device which ensures constant alignment of the paper with respect to the platen.
  • a rotating cylindrical platen sometimes also called a printing cylinder or roller
  • the typewriter stages are arranged in positions that allow the printing mechanism to strike the surface of the stage and the printing sheet carried by it, with equal force from end to end. the relative travel of the printing mechanism relative to the platen, while allowing the latter to rotate.
  • the regular feeding of the sheets of paper into a typewriter poses a characteristic problem which must be resolved.
  • a support is mounted on a pivot and the support in turn carries the end points of the axes on which the feed rollers are mounted, which equalizes the forces applied by the feed rollers located at the front and back of the stage.
  • the positioning of the feed roller supports forwards and backwards is traditionally done by tightening or loosening screws passing through buttonholes with lost or adjusting movement, formed in the supports or by respecting positions for the precisely defined supports. on the chassis. If the elements are slightly offset from their appropriate position, the different pressures applied by the rollers cause a defective feeding of the paper and these elements must then be adjusted empirically.
  • This chassis has sufficient rigidity to maintain the parallelism between the feed rollers which will be located at the front and at the rear of the plate.
  • This roller holder chassis is coupled by means from a ball joint to a support element itself coupled to the main chassis of the machine and ensuring an elastic thrust from the roller-carrying chassis towards the plate.
  • the rotational movements of the roller frame on the ball joint make it possible to equalize the contact of the feed rollers against the plate, while the rotation around an axis perpendicular to the axis of the plate will allow the feed rollers to be placed in a position exactly parallel to the axis of the plate.
  • the partial rotation of the roller frame on the ball joint will equalize the radial engagement forces between the feed rollers and the plate so that the forces applied to each end of the axis of the feed rollers are practically equal, which allows the regular engagement of the paper around the platen and its correct feeding.
  • the advantage of the device according to the invention compared to those of the prior art, is that it allows the axes of the feed rollers to be placed parallel to the axis of the plate, simply by bringing the rollers into contact with this, while simultaneously making it possible to regularly distribute the forces exerted by the rollers on the plate.
  • the predefined position of the ball joint relative to the axis of the plate eliminates the need to have to make complex adjustments after assembly.
  • FIG. 1 represents a first embodiment of a paper feed device according to the invention, in which the roller-carrying frame on ball joint is pivotally mounted relative to the machine frame.
  • FIG. 2 represents a second embodiment of the invention in which the roller-carrying chassis on a ball joint is mounted on a support profile moving in translation with the plate.
  • Figure 3 is a sectional view of the device of Figure 2 taken along line 3-3.
  • the main frame 10 of the typewriter carries a pivoting arm 12 whose pivot axis is parallel to the axis of rotation of the cylindrical plate 34.
  • a flexible blade 14 fixed cantilevered to the main frame 10 by means of a screw 11 exerts on the arm 12 a restoring force directed upwards in the figure.
  • the arm 12 is integral with a support element 16.
  • the arm 12 and the element 16 can be manufactured separately, then fixed to each other, if desired.
  • the element 16 has a cutout 18 through which passes a tongue 20 formed by a curved part of a roller holder frame 22.
  • the tongue 20 introduced into the cutout 18 tends to limit the movements of the roller holder frame 22 during the instants where the feed rollers 30, 32 are not in contact with the plate 34, to avoid accidental disassembly or any interference with neighboring elements of the typewriter.
  • the chassis 22 has two opposite ends folded upwards 24 in which axes 26 and 28 are mounted for rotation.
  • the axes 26 and 28 respectively carry the feed rollers located at the front and at the rear of the plate.
  • the feed rollers 30, located at the front of the turntable can be the same size or, smaller than the feed rollers 32 located at the back of the turntable depending on the design of the typewriter.
  • the feed rollers 32 located at the rear of the plate will generally be made to rotate with the axis 28 so as to rotate all together to facilitate the feeding of the paper.
  • the plate 34 once installed in the machine is in contact with the feed rollers 30 and 32 respectively.
  • the roller holder frame 22 has a recess in its lower surface which forms a boss 36 on its upper surface.
  • a nipple with a spherical or pointed end can be introduced into this recess in order to constitute a ball joint with the latter.
  • This pin is carried by the support element 16 and can be adjustable or not relative to the latter.
  • FIG. 1 represents more particularly the mounting technique used for a typewriter with a fixed stage. Ie not moving in translation in the machine.
  • Figures 2 and 3 show an embodiment of the invention in the case of a typewriter with movable stage, that is to say that can move in translation in the machine.
  • a support profile 42 moves jointly in translation with the plate 34 in the machine.
  • This profile 42 corresponds to the element 16 of Figure 1 and has the same opening 18 as the latter, in which is housed the curved tab 20 of the roller holder frame 22, but unlike the element 16, it is fixed relative to the plate.
  • This profile 42 carries a pin 44 with a spherical or pointed end, housed in the recess 36 of the roller holder frame and thus constituting a ball joint with this recess.
  • the pin 44 can be adjusted in height above the profile 42.
  • the roller holder frame 22 is shaped to be able to deform elastically under the action of external forces.
  • the elastic deformation of the support 22 produces, in this embodiment, the same effect as that produced by the spring 14 in the embodiment described with reference to FIG. 1.
  • the rod 37 By actuating the lever 40 for releasing the paper, the rod 37 is driven in rotation and its eccentrics 39 come to bear on the frame 22, on either side of the ball joint. The downward forces exerted by the eccentrics then cause the deformation of the frame 22, which curves by pressing on the stud 44. As a result, the feed rollers 30, 32 are separated from the surface of the plate 34, which allows the introduction or removal of paper.

Landscapes

  • Handling Of Cut Paper (AREA)
  • Handling Of Sheets (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)
EP79103346A 1978-11-06 1979-09-07 Vorrichtung zur Zuführung von Papier für eine rotierende Schreibmaschinenwalze Ceased EP0013288A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/957,942 US4221489A (en) 1978-11-06 1978-11-06 Self aligning paper feed roller assembly
US957942 1978-11-06

Publications (2)

Publication Number Publication Date
EP0013288A2 true EP0013288A2 (de) 1980-07-23
EP0013288A3 EP0013288A3 (de) 1980-10-15

Family

ID=25500375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103346A Ceased EP0013288A3 (de) 1978-11-06 1979-09-07 Vorrichtung zur Zuführung von Papier für eine rotierende Schreibmaschinenwalze

Country Status (8)

Country Link
US (1) US4221489A (de)
EP (1) EP0013288A3 (de)
JP (1) JPS5565581A (de)
AU (1) AU523701B2 (de)
BR (1) BR7907186A (de)
CA (1) CA1122148A (de)
ES (1) ES485636A1 (de)
IT (1) IT1165336B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542254A1 (en) * 1983-03-10 1984-09-14 Sagem Removable pressure roller system for printing machine
FR2562475A2 (fr) * 1983-03-10 1985-10-11 Sagem Systeme de galet presseur ecartable pour machine imprimante ou analogue
EP0162405A1 (de) * 1984-05-24 1985-11-27 Wang Laboratories Inc. Papiertransportmechanismus für eine Schreibvorrichtung

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE31747E (en) * 1981-12-23 1984-11-27 International Business Machines Corporation Paper feed roller assembly for a typewriter or printer
US4364683A (en) * 1981-12-23 1982-12-21 International Business Machines Corporation Paper feed roller assembly for a typewriter or printer
US4537521A (en) * 1982-11-05 1985-08-27 Siemens Aktiengesellschaft Paper feed mechanism with varying contact pressure
JPS6021278A (ja) * 1983-07-15 1985-02-02 Brother Ind Ltd プリンタの用紙押え装置
US4494887A (en) * 1984-01-10 1985-01-22 Litton Systems, Inc. High speed printer assembly
US4592670A (en) * 1984-06-29 1986-06-03 International Business Machines Corporation Angular motion paper feed release system
JPS6413340U (de) * 1987-07-15 1989-01-24
JPH0423014Y2 (de) * 1990-07-25 1992-05-27
US5938356A (en) 1997-03-12 1999-08-17 Encad, Inc. Pinch roller for inkjet printer
US6435746B2 (en) 1997-03-12 2002-08-20 Encad, Inc. Pinch roller for inkjet printer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE238574C (de) *
DE1211224B (de) * 1958-04-12 1966-02-24 Adlerwerke Kleyer Ag H Pendelnd gelagerte Papierfuehrungsrolle, insbesondere fuer Schreibmaschinen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1453579A (en) * 1918-11-09 1923-05-01 Corona Typewriter Co Inc Typewriting machine
US1453582A (en) * 1918-12-27 1923-05-01 Corona Typewriter Co Inc Typewriting machine
US1910329A (en) * 1927-05-02 1933-05-23 Remington Typewriter Co Typewriting machine
US1841116A (en) * 1929-03-20 1932-01-12 Victor Adding Machine Co Typewriter paper feed mechanism
US2121853A (en) * 1936-12-04 1938-06-28 Burroughs Adding Machine Co Typewriter
US2218108A (en) * 1939-01-16 1940-10-15 L C Smith & Corona Typewriters Paper feed mechanism
US2297490A (en) * 1939-07-24 1942-09-29 Martin Hans Paper guide and feed for typewriters
DE971816C (de) * 1950-11-28 1959-04-02 Adlerwerke Kleyer Ag H Papierfuehrung an Bueromaschinen, insbesondere Schreibmaschinen
US2848092A (en) * 1953-01-28 1958-08-19 Adlerwerke Kleyer Ag H Paper feeding device for typewriting machines
DE2124877A1 (de) * 1971-05-19 1972-12-07 Zentronik Veb K Papierführungsvorrichtung für Schreib- und ähnliche Büromaschinen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE238574C (de) *
DE1211224B (de) * 1958-04-12 1966-02-24 Adlerwerke Kleyer Ag H Pendelnd gelagerte Papierfuehrungsrolle, insbesondere fuer Schreibmaschinen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542254A1 (en) * 1983-03-10 1984-09-14 Sagem Removable pressure roller system for printing machine
FR2562475A2 (fr) * 1983-03-10 1985-10-11 Sagem Systeme de galet presseur ecartable pour machine imprimante ou analogue
EP0162405A1 (de) * 1984-05-24 1985-11-27 Wang Laboratories Inc. Papiertransportmechanismus für eine Schreibvorrichtung

Also Published As

Publication number Publication date
AU523701B2 (en) 1982-08-12
JPS5739231B2 (de) 1982-08-20
US4221489A (en) 1980-09-09
ES485636A1 (es) 1980-04-16
AU5147179A (en) 1980-05-15
IT7926957A0 (it) 1979-10-31
IT1165336B (it) 1987-04-22
CA1122148A (en) 1982-04-20
BR7907186A (pt) 1980-07-08
EP0013288A3 (de) 1980-10-15
JPS5565581A (en) 1980-05-17

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Effective date: 19820816

RIN1 Information on inventor provided before grant (corrected)

Inventor name: POLLARD, EDWARD ELLETT

Inventor name: PULLEN, JOHN LIGGETTE

Inventor name: MAROWSKI, RAYMOND MICHAEL

Inventor name: ENGLE, VENCIL DELANO