EP0258881B1 - Mehrfunktionen-Papiertransportmechanismus mit einem Transportrollensystem mit zwei unterschiedlichen Vorschubgeschwindigkeiten - Google Patents

Mehrfunktionen-Papiertransportmechanismus mit einem Transportrollensystem mit zwei unterschiedlichen Vorschubgeschwindigkeiten Download PDF

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Publication number
EP0258881B1
EP0258881B1 EP19870112785 EP87112785A EP0258881B1 EP 0258881 B1 EP0258881 B1 EP 0258881B1 EP 19870112785 EP19870112785 EP 19870112785 EP 87112785 A EP87112785 A EP 87112785A EP 0258881 B1 EP0258881 B1 EP 0258881B1
Authority
EP
European Patent Office
Prior art keywords
roller
feed roller
feeding mechanism
paper feeding
record media
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.)
Expired
Application number
EP19870112785
Other languages
English (en)
French (fr)
Other versions
EP0258881A1 (de
Inventor
Vil Patrick Johnikin
James Patrick Ruse
John Antony Schmidt
David William Stanhope
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 EP0258881A1 publication Critical patent/EP0258881A1/de
Application granted granted Critical
Publication of EP0258881B1 publication Critical patent/EP0258881B1/de
Expired 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
    • B41J11/48—Apparatus for condensed record, tally strip, or like work using two or more papers, or sets of papers, e.g. devices for switching over from handling of copy material in sheet form to handling of copy material in continuous form and vice versa or point-of-sale printers comprising means for printing on continuous copy material, e.g. journal for tills, and on single sheets, e.g. cheques or receipts
    • 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
    • B41J13/03—Rollers driven, e.g. feed rollers separate from platen

Definitions

  • the invention relates to a paper handling device for feeding cut sheets and continuous forms using a dual feed rate roller system wherein a single compressible feed roller is compressed by different amounts and thus transports the paper at different speeds along the input and output paths.
  • European Patent Application EP-A-0 038 415 describes a paper feeding mechanism for cut sheets or continuous forms and comprises first means for storing blank record media, second means for storing record media having information recorded thereon, and a paper path for conveying said blank record media from said first means through the print station to said second means, said paper path comprising an input path and an output path.
  • a disadvantage of this paper feeding mechanism is that moving the record medium along the input and output path is very complicated and liable to defects.
  • United States Patent No. 4,569,610 describes a printer having a document transport system with alternate paths for feeding either cut sheets or continuous forms.
  • a disadvantage of thin printer is that the continuous forms should be removed before operating in the sheet feed mode; otherwise, continuous forms are fed while in the sheet feed mode wasting paper.
  • the object of this invention is to provide a paper handling mechanism that can feed continuous forms or cut sheets that is both simple to build and easy to use.
  • This invention provides an all purpose paper feeding mechanism that can handle cut sheets or continuous forms by using a dual feed rate roller system wherein a feed roller constructed of a compressible material is pressed upon by separate idler rollers with different deflections to produce different feed rates.
  • the feed rates being related to the deflection in a non-linear relationship, thus a large deflection results in a small change in feed rate.
  • the paper travels at a higher feed rate in the output path than in the input path. This maintains a high paper tension as the paper passes through a print station.
  • the paper handling mechanism of the preferred embodiment is intended for use with a computer printer where the printer has means for recording information including a platen and print head. The print head and platen are disposed from one another in a predetermined spaced relationship defining a print station therebetween.
  • the paper handling mechanism of the invention has a first means for storing blank record media, second means for storing record media having information recorded thereon and a paper path for conveying blank record media from the first means through the print station to the second means.
  • the paper path has an input path and an output path.
  • the mechanism also comprises a compressible feed roller in contact with first and second solid idler rollers.
  • the first solid idler roller is disposed adjacent the input path and the second solid idler roller is disposed adjacent the output path.
  • the first solid idler roller is directed against the compressible feed roller deforming said compressible feed roller to a reduced radius R1 and the second solid idler roller is directed against the compressible feed roller deforming said feed roller to a reduced radius R2.
  • the reduced radius R1 is less than the reduced radius R2 so that record media travel along the output path at a feed rate greater than record media travel along the input path.
  • the improvement to a paper feed mechanism for delivering a record media to a print station and then conveying the record media to a bin means comprises a paper path having a sheet input path, a forms input path and an output path.
  • the sheet input path has means for receiving sheets and the output path has means for transporting printed record media to the bin means for storing said printed record media.
  • a compressible feed roller is adjacent to both the sheet input path and the output path and has an uncompressed radius R.
  • the compressible feed roller and a first solid idler roller define an input nip therebetween for driving sheets of record media along the sheet input path to a high friction roller means downstream of said input path.
  • the first idler roller is compressed against the compressible feed roller to reduce the uncompressed radius R to a reduced input radius R1.
  • the first solid idler roller and the compressible feed roller of input radius R1 are in driven relationship to drive said record media along said sheet input path at a feed rate slightly greater than or equal to the feed rate of the high friction roller means.
  • Means for recording information on record media comprising a print head 1 and a platen 2.
  • the print head can be of any type such as a wire matrix, ink jet or other suitable device for generating characters.
  • the platen is a fixed bar constructed of aluminum or other suitable material.
  • Print head 1 and platen 2 are disposed in a predetermined spaced relationship and between them define a print station 3.
  • the print head and platen are part of a printer (not shown) configured for the paper handling mechanism of this invention.
  • Separator 10 is shown with two paper bins 12 for storing blank record media and an output tray 14 for storing record media having information recorded thereon.
  • Record media such as cut sheets, labels, envelopes or the like are transported from bins 12 to input path 22 and are returned to tray 14 along output path 24.
  • Input path 22 and output path 24 form parts of paper path 20.
  • Feed roller 30 Downstream of separator 10 is compressible feed roller 30 in contact with first solid idler roller 32.
  • Feed roller 30 and idler roller 32 are disposed adjacent input path 22 and define an input nip 34 therebetween.
  • Feed roller 30 is constructed of a micro-cellular urethane material of a low durometer as measured using the standard Shore A method.
  • the compressible material of feed roller 30 has a durometer of 20 while materials having a durometer up to 40 have been shown to work.
  • Compressible feed roller 30 has an uncompressed radius R.
  • the action of solid idler roller 32 pressing against feed roller 30 deforms or deflects feed roller 30 to an input radius R1.
  • record media travel along paper path 20 to high friction roller means 40.
  • High friction roller means 40 comprises metering roller 42 and backup rollers 42 and 44. High friction roller means 40 accurately meters record media to print station 3.
  • Input radius R1 is selected so that record media travel along said input path at a rate equal to or slightly greater than the rate at which record media are fed to the print station 3 by high friction roller means 40.
  • Solid idler roller 36 is pressed against compressible feed roller 30 adjacent the output path 24 and defines an output nip 38 therebetween.
  • the action of solid idler roller 36 against feed roller 30 deforms feed roller 30 to an output radius R2 less than or equal to uncompressed radius R.
  • Output radius R2 is selected to be greater than input radius R1. Since feed roller 30 turns on a single shaft (not shown) at a constant angular velocity the linear velocity of record media passing through output nip 38 is greater than the linear velocity of record media passing through input nip 34.
  • the higher feed rate at the output nip 38 is accomplished with idler roller 36 applying a lower feed force against feed roller 30 than the feed force applied by idler roller 32.
  • the combination of high feed rate and low feed force has the synergistic effect of holding record media taut as it passes through print station 3 without disrupting the metering effect of high friction roller means 40.
  • record media After passing through output nip 38, record media pass along output path 24 and are conveyed to separator 10 where they are stored in output tray 14.
  • Solid idler rollers 32 and 36 are shown to be on fixed shafts 52 and 54 eliminating the need for spring loading.
  • Compressible feed roller 30 comprises a central roller 31 and supporting side rollers 33 and 35 for maintaining central roller 31 in contact with the record media (not shown) against the idler rollers 32 and 36.
  • input nip 34 and output nip 38 are also minimized which reduces the drive force required to rotate shaft 50.
  • Supporting side rollers 33 and 35 need not be constructed of the same compressible material as central roller 31, however, in the preferred embodiment they are constructed of the same material.
  • Idler rollers 32 and 36 are constructed of acetal, nylon or other similar hard material. In the preferred embodiment, four dual feed rate rollers are arrayed on shaft 50.

Landscapes

  • Delivering By Means Of Belts And Rollers (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)
  • Advancing Webs (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Claims (6)

  1. Papiertransportmechanismus mit einem Drucker, wobei der Drucker Mittel zur Aufzeichnung von Information auf einen Aufzeichnungsträger enthält,diese Mittel enthalten eine Platte (2) und einen Druckkopf (1) zur Erzeugung von Zeichen, der Druckkopf (1) ist zur Platte (2) in einem vorbestimmten Abstand angeordnet, so daß eine Druckstation definiert wird, der Papiertransport-mechanismus enthält:

    erste Mittel (12) zur Speicherung leerer Aufzeichnungsträger,

    zweite Mittel(14) zur Speicherung von Aufzeichnungsträgern mit darauf aufgezeichneten Informationen,

    eine Papierbahn mit einer Eingabebahn (22) und einer Ausgabebahn (24), zum Transport der leeren Aufzeichnungsträger von den ersten Mitteln (12) durch die Druckerstation (3) zu den zweiten Mitteln (14);

    gekennzeichnet durch

    eine erste und zweite feste Führungsrolle (32, 36),die mit einer verformbaren Transportrolle (30) in Kontakt sind, wobei die erste feste Führungsrolle (32) der Eingabebahn (22) benachbart angeordnet ist und die zweite Führungsrolle (36) der Ausgabebahn benachbart angeordnet ist, die erste Führungsrolle (32) gegen die verformbare Transportrolle (30) derart gerichtet ist, daß

    ein effektiver Radius R1 gebildet wird und die zweite Führungsrolle (36) gegen die verformbare Transportrolle(30) derart gerichtet ist, daß ein effektiver Radius R2, der größer als der effektive Radius 1 ist, gebildet wird , so daß der Aufzeichnungsträger entlang der Ausgabebahn mit einer größeren Transportgeschwindigkeit als entlang der Eingabebahn bewegt wird,

    und ein Hochreibungsrollmittel (40) zum Transport des unterhalb der Eingabebahn befindlichen Aufzeichnungsträgers entlang des Papierbahn zur Druckerstation.
  2. Papiertransportmechanismus nach Anspruch 1, worin die verformbare Transportrolle (30) eine Breite hat, die weniger oder gleich der Breite der festen Führungsrollen (32, 36) ist.
  3. Papiertransportmechanismus nach Anspruch 1 oder 2, worin die verformbare Transportrolle (30) wesentlich schmaler als die festen Führungsrollen (32, 36) ist.
  4. Papiertransportmechanismus nach Anspruch 1 bis 3, worin die verformbare Transportrolle zusätzlich ein Zentralteil (31) zur Kontaktierung des Aufzeichnungsträgers und der festen Transportrollen enthält und seitenunterstützende Mittel (33, 35) zur Unterstützung des Zentralteils (31), die nicht in Kontakt mit den festen Führungsrollen (32, 36)stehen.
  5. Papiertransportmechanismus nach Anspruch 1 bis 4, worin das Zentralteil (31) der verformbaren Transportrolle (30) wesentlich schmaler als die festen Führungsrollen ist.
  6. Papiertransportmechanismus nach Anspruch 1 bis 5, worin das Zentralteil (31) der verformbaren Transportrolle geringer als die halbe Breite oder gleich der halben der Breite der festen Führungsrollen ist.
EP19870112785 1986-09-03 1987-09-02 Mehrfunktionen-Papiertransportmechanismus mit einem Transportrollensystem mit zwei unterschiedlichen Vorschubgeschwindigkeiten Expired EP0258881B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90316386A 1986-09-03 1986-09-03
US903163 1997-07-30

Publications (2)

Publication Number Publication Date
EP0258881A1 EP0258881A1 (de) 1988-03-09
EP0258881B1 true EP0258881B1 (de) 1992-03-04

Family

ID=25417042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870112785 Expired EP0258881B1 (de) 1986-09-03 1987-09-02 Mehrfunktionen-Papiertransportmechanismus mit einem Transportrollensystem mit zwei unterschiedlichen Vorschubgeschwindigkeiten

Country Status (3)

Country Link
EP (1) EP0258881B1 (de)
JP (1) JPS6364779A (de)
DE (1) DE3777019D1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0818450B2 (ja) * 1987-08-08 1996-02-28 三菱電機株式会社 サ−マルプリンタ
NO874100L (no) * 1987-09-30 1989-03-31 Jacobsen Loyd Anordning for automatisk utmating av papir gjennom et skriverdeksel.
JP2689469B2 (ja) * 1988-04-08 1997-12-10 セイコーエプソン株式会社 プリンタ紙送り機構
JPH0395254U (de) * 1990-01-19 1991-09-27
CN106142868B (zh) * 2016-08-30 2019-04-05 常州汉威信科技股份有限公司 打印机多层分联机构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311612A (en) * 1976-07-19 1978-02-02 Omron Tateisi Electronics Co Printer with paper feeder
DE3014430C2 (de) * 1980-04-15 1984-08-23 Nixdorf Computer Ag, 4790 Paderborn Einrichtung zur schrittweisen Zuführung von Aufzeichnungsträgern an ein elektromechanisches Schreibwerk
US4346880A (en) * 1980-10-02 1982-08-31 Xerox Corporation Apparatus for inverting substrates
DE3318117A1 (de) * 1982-05-20 1983-11-24 International Standard Electric Corp., 10022 New York, N.Y. Blattausrichtvorrichtung

Also Published As

Publication number Publication date
EP0258881A1 (de) 1988-03-09
JPS6364779A (ja) 1988-03-23
DE3777019D1 (de) 1992-04-09

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