EP0420366A1 - Einrichtung für den Papiertransport in Druckern, insbesondere in Matrixdruckern - Google Patents

Einrichtung für den Papiertransport in Druckern, insbesondere in Matrixdruckern Download PDF

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Publication number
EP0420366A1
EP0420366A1 EP90250243A EP90250243A EP0420366A1 EP 0420366 A1 EP0420366 A1 EP 0420366A1 EP 90250243 A EP90250243 A EP 90250243A EP 90250243 A EP90250243 A EP 90250243A EP 0420366 A1 EP0420366 A1 EP 0420366A1
Authority
EP
European Patent Office
Prior art keywords
tractor
tractors
drive shaft
printer
wheel
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
EP90250243A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ulrich Dipl.-Ing. Buschman
Günter Dipl.-Ing. Gomoll
Wolfgang Dipl.-Ing. Hauslaib
Kurt Röhrer
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0420366A1 publication Critical patent/EP0420366A1/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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/26—Pin feeds
    • B41J11/30—Pin traction elements other than wheels, e.g. pins on endless bands

Definitions

  • the invention relates to a device for transporting paper in printers, in particular in matrix printers, for drawing in continuous webs by means of traversable tractors arranged in pairs on the printer frame, the pins of which engage in the peripheral perforations of continuous paper, the pin belts being guided over at least one wheel of the tractor and there is at least one driven tractor wheel.
  • Such pairs of tractors are used as a pull tractor or a push tractor.
  • Train tractors pull the paper web out of the printer from a storage container over the platen and are therefore arranged behind the platen in the direction of transport.
  • Push tractors push the paper drawn from the storage container through guide channels to the pressure abutment and push it further out through guides out of the printer and are therefore arranged in front of the pressure abutment in the transport direction.
  • Feeding the paper involves fewer problems with single sheets than with multi-layer continuous webs. It can therefore be advantageous to use a push tractor instead of a push tractor when feeding paper from below to the printer.
  • a printer is rarely equipped with both types of tractor because double equipment would increase the manufacturing price.
  • the structure of the printer becomes more complicated if both types of tractor are arranged.
  • the present invention is based on a standard version of the printer, which provides a permanently installed pair of tractors as a pushing device for edge-perforated endless webs.
  • the invention has for its object to propose a locking device for the tractor pairs in both push and pull tractor design.
  • the object is achieved according to the invention for one of the tractor operating modes or tractor arrangements in that the tractor, working as a pushing means, is each mounted on a drive shaft and is prevented from rotating by means of a projection on the side opposite the drive shaft on the printer frame.
  • This one-sided rotation inhibition allows the tractor pair to be easily set for overrun operation and still allows the tractors to be shifted transversely to the selected paper width.
  • the projections of both tractors are held on the printer frame in a continuous guide extending parallel to the drive shaft.
  • the tractor flap has a slot which is in the swivel plane and narrows in the closing direction and is matched to the round bar.
  • the device for paper transport in a printer 1 (FIG. 4) with a slide guide 2 for a print head 3, a print abutment 4 has a deflection roller 5 approximately in the center, around which an endless web 6 is guided.
  • the edge-perforated endless web 6 is either pushed in by a push tractor 7 or pulled by a pull tractor 8.
  • the pins 9 of a pin belt 10 engage in the edge-perforated endless web 6 (FIG. 1), which through a long curved guide 11 (greater than 180 degrees) and a long straight guide 12 forms a long distance of the guide on the paper of the endless web 6.
  • the tractors 7, 8 have at least one driven wheel 13 which is rotatably mounted on a polygonal drive shaft 14.
  • a tractor frame 15 is provided with a projection 16 which bears on the opposite side 15a against a floor pan 21 of the printer frame 1a and thus prevents the tractor frame 15 from rotating.
  • the projections 16 of both tractors 7 are held in a transverse guide 17 which extends in a continuous guide 17 which extends parallel to the drive shaft 14.
  • the guide 17 can be provided with a toothing 18 on its support side 17a, and the projections 16 consist of resilient arms 19, a lower arm 19a having a toothing 20 which engages in the toothing 18 of the guide 17.
  • the tractors 8 according to FIGS. 3 and 4 are designed as described and are also driven and held by a polygonal drive shaft 14. At the same time, the two tractors 8 are supported on a round rod 22.
  • the drive shaft 14 and the round rod 22 are fastened or pivoted in side end shields 23a and 23b and together form a removable and easily reusable structural unit.
  • the transverse displacement of the two tractors 8 to a desired paper web width is fixed here by pivotable tractor flaps 24.
  • the pull tractor 8 is particularly advantageous for multi-layer endless webs 6 or label webs which are inserted on the printer 1 through a lower guide channel 27 and between the idling deflecting roller 5 and one or more pressure rollers 28 is guided. Since the tractors 7 and 8 are completely identical, the push tractor 7 also has a tractor flap 24 with a slot 26, which is, however, not required here.

Landscapes

  • Handling Of Sheets (AREA)
  • Advancing Webs (AREA)
EP90250243A 1989-09-29 1990-09-24 Einrichtung für den Papiertransport in Druckern, insbesondere in Matrixdruckern Ceased EP0420366A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933033 1989-09-29
DE3933033A DE3933033A1 (de) 1989-09-29 1989-09-29 Einrichtung fuer den papiertransport in druckern, insbesondere in matrixdruckern

Publications (1)

Publication Number Publication Date
EP0420366A1 true EP0420366A1 (de) 1991-04-03

Family

ID=6390761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250243A Ceased EP0420366A1 (de) 1989-09-29 1990-09-24 Einrichtung für den Papiertransport in Druckern, insbesondere in Matrixdruckern

Country Status (4)

Country Link
US (1) US5184905A (enrdf_load_stackoverflow)
EP (1) EP0420366A1 (enrdf_load_stackoverflow)
JP (1) JPH03126566A (enrdf_load_stackoverflow)
DE (1) DE3933033A1 (enrdf_load_stackoverflow)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3101648A1 (de) * 1980-01-22 1981-11-19 Kabushiki Kaisha Seikosha, Tokyo Papiervorschubeinrichtung
US4304345A (en) * 1980-04-04 1981-12-08 Xerox Corporation Modular bidirectional tractor feed assembly
DE3412853A1 (de) * 1984-04-03 1985-10-03 Mannesmann AG, 4000 Düsseldorf Drucker, insbesondere matrixdrucker, mit transporteinrichtung fuer randgelochte aufzeichnungstraeger
DE3634033A1 (de) * 1985-10-07 1987-04-09 Seikosha Kk Papiervorschubraupe mit stachelriemen

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032727A (en) * 1976-01-02 1977-06-28 Western Electric Company, Inc. Releasably locked mounting assembly for telephone dials
JPS552043A (en) * 1978-06-22 1980-01-09 Oki Electric Ind Co Ltd Fixing system for continuous supply device
JPS58163254U (ja) * 1982-03-15 1983-10-31 東芝テック株式会社 プリンタのトラクタ装置
JPS6083868A (ja) * 1983-10-17 1985-05-13 Nec Corp プリンタ
JPS60114753U (ja) * 1984-01-05 1985-08-03 シチズン時計株式会社 プリンタのピンホイル固定構造
JPS60240472A (ja) * 1984-05-15 1985-11-29 Usac Electronics Ind Co Ltd プリンタ
JPS6147651U (ja) * 1984-08-31 1986-03-31 アルプス電気株式会社 プリンタの紙送り装置
JPS61204746U (enrdf_load_stackoverflow) * 1985-02-02 1986-12-24
JPS6282058A (ja) * 1985-10-07 1987-04-15 Seikosha Co Ltd ピンベルト式ペ−パ−トラクタ
JPS62203043U (enrdf_load_stackoverflow) * 1986-06-16 1987-12-24
JPS6357464A (ja) * 1986-08-27 1988-03-12 Brother Ind Ltd 用紙搬送装置
JPS6359565A (ja) * 1986-08-30 1988-03-15 Citizen Watch Co Ltd プツシユ・プル共用プリンタ−
JPS63252860A (ja) * 1987-04-08 1988-10-19 Brother Ind Ltd ピントラクタ
JPS63315450A (ja) * 1987-06-17 1988-12-23 Seikosha Co Ltd ペ−パ−トラクタ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3101648A1 (de) * 1980-01-22 1981-11-19 Kabushiki Kaisha Seikosha, Tokyo Papiervorschubeinrichtung
US4304345A (en) * 1980-04-04 1981-12-08 Xerox Corporation Modular bidirectional tractor feed assembly
DE3412853A1 (de) * 1984-04-03 1985-10-03 Mannesmann AG, 4000 Düsseldorf Drucker, insbesondere matrixdrucker, mit transporteinrichtung fuer randgelochte aufzeichnungstraeger
DE3634033A1 (de) * 1985-10-07 1987-04-09 Seikosha Kk Papiervorschubraupe mit stachelriemen

Also Published As

Publication number Publication date
US5184905A (en) 1993-02-09
DE3933033C2 (enrdf_load_stackoverflow) 1991-12-05
JPH03126566A (ja) 1991-05-29
DE3933033A1 (de) 1991-04-11

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