EP0473884A1 - System zur Ausrichtung von Blättern in einem Drucker - Google Patents

System zur Ausrichtung von Blättern in einem Drucker Download PDF

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Publication number
EP0473884A1
EP0473884A1 EP91108260A EP91108260A EP0473884A1 EP 0473884 A1 EP0473884 A1 EP 0473884A1 EP 91108260 A EP91108260 A EP 91108260A EP 91108260 A EP91108260 A EP 91108260A EP 0473884 A1 EP0473884 A1 EP 0473884A1
Authority
EP
European Patent Office
Prior art keywords
roller means
wobble
drive roller
sheets
alignment system
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.)
Withdrawn
Application number
EP91108260A
Other languages
English (en)
French (fr)
Inventor
Lawrence J. Labarre
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0473884A1 publication Critical patent/EP0473884A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/16—Inclined tape, roller, or like article-forwarding side registers
    • B65H9/166—Roller

Definitions

  • the present invention generally relates to systems for aligning sheets in printing machines and, more particularly, to systems for aligning sheets in inkjet printers and similar devices used in conjunction with microprocessor-based computers.
  • sheets In printers such as inkjet printers and similar devices used in conjunction with microprocessor-based computers, sheets must be quickly and uniformly manipulated so that one of their edges is in alignment with a linear guide surface. Such alignment is important, for example, in providing consistent printing margins from one sheet to the next. Alignment is also of value in reducing paper jams during printing.
  • FIGURES 3a and 3b of the patent show idler rollers for feeding a paper web against stop members as the paper traverses a paper holding/driving assembly of a plotter.
  • the patent states that, by allowing free play of the forward ends of the shafts for the idler rollers while not permitting free play on the rearward end of the same shafts, the edges of sheets can be continuously forced against stop members as the sheets are driven in either direction.
  • the present invention provides a system for aligning individual sheets in parallel, abutting relation to a linear guide rail as the sheets travel on a generally planar surface toward a printing station.
  • the alignment system includes a drive roller for driving individual sheets back and forth on the planar surface and a wobble roller mounted in opposition to the drive roller for pivoting in the direction of sheet travel so that the roller pulls the lateral edges of the sheets into parallel, abutting contact with the guide rail.
  • Both the drive roller and the wobble roller are rubber covered, and the rubber coating on the drive roller has a durometer value less than the rubber coating on the wobble roller to provide a degree of compliance.
  • the durometer of the rubber coating on the wobble roller is less than about seventy, while the durometer of the rubber coating on drive roller is less than about fifty-five.
  • FIGURE 1 shows one embodiment of an alignment system for manipulating sheets during their travel along a planar surface 5 toward a printing station (not shown). For purposes of simplicity of illustration, only a fragment of a single sheet is shown in the drawing. Typically, sheets are paper, but the other printable materials can be used.
  • the alignment system in FIGURE 1 includes a rail-like linear guide member 9 and a tow-in means, generally indicated by the number 13, for aligning the sheets with respect to the linear guide member.
  • linear guide member 9 is depicted as a rail which extends in the intended direction of sheet travel and which is oriented to provide a guide surface 10 that extends perpendicular to planar surface 5.
  • the tow-in means 13 is located close to the linear guide member 9 for manipulating sheets for printing such that the right-hand lateral edges of the sheets are brought into parallel, abutting alignment with guide surface 10.
  • the system in FIGURE 1 includes a drive means, generally indicated by the number 11, for driving sheets for printing in a direction parallel to linear guide member 9.
  • drive means 11 includes a first drive roller 20 and a pinch roller 21 that is mounted in opposition to the drive roller.
  • first drive roller 20 extends upward through an opening in planar surface 5 for engaging the undersurface of individual sheets as they travel along the planar surface; in the illustrated embodiment, however, the opening for drive roller 20 is not specifically shown.
  • first drive roller 20 is coated with a gritty material that enhances engagement between the drive roller and the driven sheets.
  • the surface of pinch roller 21 is formed from a material such as silicon rubber that is relatively hard (i.e., has high durometer).
  • the surface of first drive roller 20 is formed of a material which has a higher coefficient of friction, like rubber, and is relatively softer (i.e., has a low durometer) with respect to pinch roller 21. Accordingly, first drive roller 20 and associated pinch roller 21 permit only limited compliance with driven sheets.
  • tow-in means 13 includes a "wobble" roller 27 which is positioned for engaging the top surfaces of sheets travelling on planar surface 5.
  • wobble roller 27 is rotatable on an axle 29.
  • axle 29 allows wobble roller 27 to pivot back and forth in the horizontal plane (i.e., to wobble).
  • tow-in means 13 in FIGURE 1 includes a second drive roller 31 mounted for rotation in opposition to wobble roller 27.
  • second drive roller 31 is mounted below planar member 5 and extends upward though an opening in the planar member for engaging the undersurface of sheets that travel on planar member 5; again, however, the opening for second drive roller 31 is not specifically shown.
  • both the first and second drive rollers are mounted on a common drive shaft 32 to be driven by a drive motor 34.
  • wobble roller 27 and second drive roller 31 have thin rubber coverings as shown.
  • the rubber coverings are about 1/16 inch thick.
  • the rubber covering on wobble roller 27 is harder than the rubber covering on the second drive roller 31.
  • the rubber covering on wobble roller 27 may have a durometer value of about seventy, while the rubber covering on second drive roller 31 has a durometer value of about fifty-five or less. It should be noted that at such durometer, the rubber covering on second drive roller 31 is somewhat compliant; this could be accomplished, for example, by making the second drive roller thicker.
  • FIGURE 2 shows one embodiment of structure for mounting wobble roller 27 on axle 29.
  • axle 29 extends between the legs 41 and 43 of a bifurcated member 45. It should be noted that leg 43 is located nearest linear guide member 9 and leg 41 is located further from the linear guide member.
  • a generally circular aperture 47 is formed in leg 43 for receiving one end of axle 29. In practice, the internal diameter of circular aperture 47 is sufficiently larger than the external diameter of axle 29 that the axle can rotate freely while pivoting to a limited extent.
  • a slot-shaped aperture 49 is formed in the leg 41 of bifurcated member 45.
  • the slot-shaped aperture receives the end of axle 29 while allows the axle to pivot horizontally in a limited arc.
  • slot-shaped aperture 49 has dimensions such that pivotal movement of axle 29 is limited to only a few degrees.
  • the sheet alignment system includes biasing systems 61 and 63 (e.g. springs and solenoids) for selectively engaging wobble roller 27 and pinch roller 21, respectively.
  • the biasing systems 61 and 63 are operated in accordance with a selected operational sequence such that wobble roller 27 is disengaged whenever pinch roller 21 engages a sheet, and vice versa.
  • the first and second drive rollers 20 and 31 remain in contact with the bottom surface of sheets that are supported on planar surface 5. It will be understood, however, that first drive roller 20 cannot effectively drive a sheet until pinch roller 21 is biased downward against the sheet and, likewise, second drive roller 31 cannot drive a sheet until wobble roller 27 is biased downward.
  • wobble roller 27 After wobble roller 27 has pivoted axle 29 to its fullest extent in the forward direction within slot-shaped aperture 49, the direction of rotation of second drive roller 31 is reversed to drive the sheet to travel in the opposite direction. Under such circumstances, axle 29 pivots toward the rearward end of slot-shaped aperture 49 and wobble roller 27 again applies a tow-in force that tends to pull the sheet generally toward guide rail 12.
  • the lateral edge of a sheet can be brought into parallel, abutting contact with the linear guide member by driving wobble roller 27 back and forth two or three times; typically, such action requires about one-quarter of a second.
  • the sheet will travel a generally constant distance toward guide surface 10.
  • the alignment system of FIGURE 1 could be constructed such that one inch of sheet movement in the forward or reverse direction results in movement of the lateral edge of the sheet by about one-eighth inch toward the guide member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Handling Of Cut Paper (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
EP91108260A 1990-09-07 1991-05-22 System zur Ausrichtung von Blättern in einem Drucker Withdrawn EP0473884A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US57901690A 1990-09-07 1990-09-07
US579016 1990-09-07

Publications (1)

Publication Number Publication Date
EP0473884A1 true EP0473884A1 (de) 1992-03-11

Family

ID=24315243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108260A Withdrawn EP0473884A1 (de) 1990-09-07 1991-05-22 System zur Ausrichtung von Blättern in einem Drucker

Country Status (2)

Country Link
EP (1) EP0473884A1 (de)
JP (1) JPH04244873A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492978A1 (de) * 1990-12-20 1992-07-01 AT&T GLOBAL INFORMATION SOLUTIONS INTERNATIONAL INC. Apparat zum Zuführen von Bögen
EP0653367A1 (de) * 1993-11-15 1995-05-17 NCR International, Inc. System zum Ausrichten von Dokumenten
US5465954A (en) * 1993-03-04 1995-11-14 Kabushiki Kaisha Ace Denken Paper money conveying equipment
EP0736473A3 (de) * 1995-03-31 1996-10-16 DE LA RUE INTER INNOVATION Aktiebolag Vorrichtung zum korrekten Zuführen von dünnen Gegenständen wie Banknoten, Schecks, usw.
US6805508B2 (en) * 2002-03-28 2004-10-19 Hewlett-Packard Development Company, L.P. Skew-correcting media delivery system and method
EP2243637A1 (de) 2009-04-24 2010-10-27 Neopost Technologies Kuvertiervorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008149527A1 (ja) * 2007-05-31 2008-12-11 Nidec Sankyo Corporation 画像読取装置および媒体処理装置
JP6398747B2 (ja) * 2015-01-26 2018-10-03 ブラザー工業株式会社 画像形成装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0193258A2 (de) * 1985-02-23 1986-09-03 Unisys Corporation Zweirichtungs-Führungsbahn für Belege
US4775142A (en) * 1987-02-26 1988-10-04 Pitney Bowes Inc. Roller apparatus for side registration of documents
EP0384631A2 (de) * 1989-02-21 1990-08-29 Thorn Transit Systems International Limited Fördereinrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0193258A2 (de) * 1985-02-23 1986-09-03 Unisys Corporation Zweirichtungs-Führungsbahn für Belege
US4775142A (en) * 1987-02-26 1988-10-04 Pitney Bowes Inc. Roller apparatus for side registration of documents
EP0384631A2 (de) * 1989-02-21 1990-08-29 Thorn Transit Systems International Limited Fördereinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN. vol. 28, no. 9, February 1986, NEW YORK US pages 4146 - 4148; 'DISKETTE LABEL PRINTER' *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492978A1 (de) * 1990-12-20 1992-07-01 AT&T GLOBAL INFORMATION SOLUTIONS INTERNATIONAL INC. Apparat zum Zuführen von Bögen
US5465954A (en) * 1993-03-04 1995-11-14 Kabushiki Kaisha Ace Denken Paper money conveying equipment
EP0653367A1 (de) * 1993-11-15 1995-05-17 NCR International, Inc. System zum Ausrichten von Dokumenten
US5577719A (en) * 1993-11-15 1996-11-26 Ncr Corporation Document alignment system
EP0736473A3 (de) * 1995-03-31 1996-10-16 DE LA RUE INTER INNOVATION Aktiebolag Vorrichtung zum korrekten Zuführen von dünnen Gegenständen wie Banknoten, Schecks, usw.
US5755437A (en) * 1995-03-31 1998-05-26 De La Rue Inter Innovation Ab Arrangement for correctly feeding thin objects, such as banknotes, cheques, etc.
US6805508B2 (en) * 2002-03-28 2004-10-19 Hewlett-Packard Development Company, L.P. Skew-correcting media delivery system and method
EP2243637A1 (de) 2009-04-24 2010-10-27 Neopost Technologies Kuvertiervorrichtung
US8312698B2 (en) 2009-04-24 2012-11-20 Neopost Technologies Envelope inserting apparatus

Also Published As

Publication number Publication date
JPH04244873A (ja) 1992-09-01

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