EP0420362A2 - Dispositif pour bandes à perforations marginales dans les imprimantes, en particulier les imprimantes matricielles - Google Patents

Dispositif pour bandes à perforations marginales dans les imprimantes, en particulier les imprimantes matricielles Download PDF

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Publication number
EP0420362A2
EP0420362A2 EP90250217A EP90250217A EP0420362A2 EP 0420362 A2 EP0420362 A2 EP 0420362A2 EP 90250217 A EP90250217 A EP 90250217A EP 90250217 A EP90250217 A EP 90250217A EP 0420362 A2 EP0420362 A2 EP 0420362A2
Authority
EP
European Patent Office
Prior art keywords
drive belt
projections
pins
printers
pin
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
EP90250217A
Other languages
German (de)
English (en)
Other versions
EP0420362A3 (en
Inventor
Ulrich Dipl.-Ing. Buschmann
Günter Dipl.-Ing. Gomoll
Wolfgang Dipl.-Ing. Hauslaib
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 EP0420362A2 publication Critical patent/EP0420362A2/fr
Publication of EP0420362A3 publication Critical patent/EP0420362A3/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 edge-punched paper webs in printers, in particular in matrix printers, in which the feed force can be transmitted by means of pins of a drive belt engaging in the edge holes, the flexible drive belt itself being provided with teeth on its underside lying on a driven wheel, which in grasp the corresponding tooth gaps of the driven wheel and the paper web resting on the upper side of the drive belt is stretched transversely to the axial direction of a pin base which increases in diameter and / or is pressed transversely to the axial direction by means of a pivotable tractor flap.
  • Such drive belts are used in so-called tractors which, when arranged in pairs in the perforated edge areas of so-called leporello paper, enable the paper web to be fed very precisely.
  • the pins of the drive belt must be precisely engaged in the edge perforation for accuracy.
  • the edge perforation only comes into effect when the pins with their largest diameter fill the holes in the paper.
  • differences in power transmission are still possible here. It has to be taken into account that the forces in the two edge strips of the leporello paper are transferred simultaneously and of the same size in order to avoid skewing of the paper web.
  • the power transmission depends on the overall friction ratio, since the paper with the holes has to be moved onto and out of the pins during the transport movement.
  • the present invention has for its object to further improve the frictional relationships between the drive belt and the perforated paper web in each case in the sense of not only leaving the power transmission to the pins, but generally increasing the driving force.
  • the object is achieved according to the invention in that on the upper side of the drive belt at least between two adjacent pins surface sections are each provided with projections which increase the friction. These projections increase the friction between the paper and the drive belt when the pins are swung in at a time when the paper has not yet fully reached the larger diameter pin base.
  • the driving force is increased significantly by a greater inaccuracy as a replacement for the projections. So the drive belts can be roughened on the designated surfaces (when manufactured by spraying), such as. B. be provided with incisions between which the "projections" arise.
  • knobs, cone tips, hemispheres or the like can be used to achieve the desired effect.
  • An improvement of the invention is that the projections are designed as burr-shaped projections extending transversely to the direction of movement. This solution defines the friction surfaces by the friction forces that occur again at equal intervals.
  • the increase in the frictional forces can also be achieved in that protrusions extending over the full belt width are formed between two successive pins and projections located at the level of a pin and interrupted by the pin.
  • the projections have a height of approximately 0.1 to 0.2 mm above the upper side of the drive belt.
  • drive belts, pins on the top, teeth on the bottom and the projections are injection-molded in one piece from a plasticizable, bendable plastic.
  • the device for perforated paper webs 1 is used as a driven wheel 2 in matrix printers, with two such wheels 2 being arranged in the edge regions of the paper web 1.
  • the device is equally suitable as a tractor with flaps which can be swung in over the paper web 1, in which the driven wheel 2 and an idling wheel (not shown) are spanned by a flexible drive belt 3, as is shown for the wheel 2 in FIG. 1.
  • the flexible drive belt 3 lies with its underside 4 on the wheel 2 and at the same time engages with teeth 5 in corresponding tooth gaps of the driven wheel 2.
  • the drive belt 3 is constructed on the basis of an effective diameter 9.
  • the direction of movement 10 of the paper web 1 and the drive belt 3 is also taken into account here, because a pin 7 only bears against the hole edge of the individual holes 11 in the paper web 1 in the direction of movement 10.
  • the difference in diameter between pin 7 and hole 11 is countered by the fact that (FIG. 2) each pin 7 has a pin base 12 which is larger in diameter and is formed by corresponding radii 13.
  • the pins 7 are provided with a radius 14 at the tip.
  • the teeth 5 are held at an angle 15 of approximately 40 degrees and are located e.g. B. exactly under a pin 7 ( Figure 2). Between two of the pins 7 there are surface sections 16 on which projections 17 are formed.
  • projections 17 on the upper side 6 of the drive belt 3 can, as drawn, be designed as projections 17a running transversely to the direction of movement 10.
  • the projections 17 are equipped as projections 17b (FIG. 2) extending over the full belt width 18 and at the level of a pin 7, projections 17c interrupted by the pin 7.
  • such a drive belt 3 has a thickness of approximately 0.3 mm and the projections 17, 17a, 17b, 17c rise approximately 0.1 to 0.2 mm above the upper side 6 of the drive belt.
  • the accuracy of the dimensions, the shapes and the tolerances is also increased in that the drive belt 3, the pins 7 on the upper side 6, the teeth 5 on the lower side 4 and the projections 17, 17a, 17b, 17c made of a plasticizable, bendable Plastic can be produced in one piece using the injection molding process.

Landscapes

  • Handling Of Sheets (AREA)
  • Advancing Webs (AREA)
EP19900250217 1989-09-29 1990-08-30 Device for margin-perforated webs in printers, in particular matrix printers Ceased EP0420362A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933030A DE3933030A1 (de) 1989-09-29 1989-09-29 Vorrichtung fuer randgelochte papierbahnen in druckern, insbesondere in matrixdruckern
DE3933030 1989-09-29

Publications (2)

Publication Number Publication Date
EP0420362A2 true EP0420362A2 (fr) 1991-04-03
EP0420362A3 EP0420362A3 (en) 1991-07-31

Family

ID=6390760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900250217 Ceased EP0420362A3 (en) 1989-09-29 1990-08-30 Device for margin-perforated webs in printers, in particular matrix printers

Country Status (3)

Country Link
US (1) US5080272A (fr)
EP (1) EP0420362A3 (fr)
DE (1) DE3933030A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL163772A0 (en) * 2002-03-05 2005-12-18 Mol Belting Co Conveyor belt
US8109352B2 (en) * 2007-04-24 2012-02-07 Mattel, Inc. Children's ride-on vehicles with window mechanisms
US7967089B2 (en) * 2007-04-24 2011-06-28 Mattel, Inc. Children's ride-on vehicles with powered window mechanisms

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838804A (en) * 1973-05-10 1974-10-01 Ibm Non-shingling forms feed tractor
US4130230A (en) * 1977-10-31 1978-12-19 Data Motion Incorporated Sheet feed tractor
JPH0123816Y2 (fr) * 1980-04-15 1989-07-20
DD159685A1 (de) * 1981-06-15 1983-03-23 Helmut Altenburg Endloses transportband zum transport randgelochter aufzeichnungstraeger
JPS60230879A (ja) * 1984-05-02 1985-11-16 Oki Electric Ind Co Ltd 紙送り装置
JPH0725184B2 (ja) * 1985-01-31 1995-03-22 キヤノン株式会社 シート搬送装置
US4758107A (en) * 1986-05-02 1988-07-19 Sakase Kagaku Kogyo Kabushiki Kaisha Web feed tractor for printer
JPH0430209Y2 (fr) * 1986-12-05 1992-07-21
US4844314A (en) * 1988-02-08 1989-07-04 International Business Machines Corporation Pulley for forms feed tractor
US4874121A (en) * 1988-05-03 1989-10-17 Output Technology Corporation Web feed tractor belt assembly

Also Published As

Publication number Publication date
DE3933030C2 (fr) 1992-04-30
DE3933030A1 (de) 1991-04-11
EP0420362A3 (en) 1991-07-31
US5080272A (en) 1992-01-14

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