EP0934223A1 - Dispositif de decambrage d'un materiau de support - Google Patents

Dispositif de decambrage d'un materiau de support

Info

Publication number
EP0934223A1
EP0934223A1 EP97946733A EP97946733A EP0934223A1 EP 0934223 A1 EP0934223 A1 EP 0934223A1 EP 97946733 A EP97946733 A EP 97946733A EP 97946733 A EP97946733 A EP 97946733A EP 0934223 A1 EP0934223 A1 EP 0934223A1
Authority
EP
European Patent Office
Prior art keywords
paper
decurling
concavity
unit according
convexity
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.)
Granted
Application number
EP97946733A
Other languages
German (de)
English (en)
Other versions
EP0934223B1 (fr
Inventor
Christian Schauer
Helmut Naeser
Georg BÖHMER
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.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
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 Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Publication of EP0934223A1 publication Critical patent/EP0934223A1/fr
Application granted granted Critical
Publication of EP0934223B1 publication Critical patent/EP0934223B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/34—Apparatus for taking-out curl from webs

Definitions

  • the present invention relates to a decurling unit for decurling carrier material, in particular paper, which is fed from a fixing station and has a convex or concave curvature caused by the fixing along a direction extending parallel to the transport direction of the paper.
  • the paper bulges concave to convex when the toner is fixed due to the influence of pressure and heat.
  • This curl (English curl) depends on the paper quality, which is primarily determined by thickness, moisture and the manufacturer, and on the number of fixations, i.e. of the selected print mode. With the first fixation, a disproportionate amount of moisture is removed from the paper. Therefore, in contrast to the second, third, etc. fixation, there is a particularly strong curvature of the paper. In a newer printing system with two printing units e.g. the number of fixations depends on the print mode, such as simplex, duplex, spot color simplex, spot color duplex printing.
  • the paper quality can be assumed to be constant within a paper stack, but not the number of fixations per sheet or per page.
  • roll paper e.g. with automatic feeding into a single sheet printer at the printer entrance to be cut to size, the curvature of the fed paper which changes with the roll diameter must be taken into account.
  • the invention is therefore based on the object of providing a decurling unit which enables the paper to be smoothed regardless of the direction of deformation.
  • paper should also be smoothed by the decurling unit without deformation.
  • decurling unit of the type mentioned at the outset, which is characterized in that the decurling unit comprises an adjustable element for removing convexity in series with an adjustable element for removing concavity, both of which are to be decurled Paper going through. This means that the elements of the decurling unit can be adjusted accordingly after the paper has been deformed on the Emmoor.
  • the element for eliminating convexity is coupled in opposite directions with the element for eliminating concavity.
  • the two elements of the decurling unit can be adapted to the properties of the paper at the inlet by a single adjustment process.
  • the element for eliminating convexity is functionally coupled to the element for removing convexity in such a way that, on the one hand, with an increase in the effect of the element for removing convexity, the effect of the element for removing is reduced of concavity and on the other hand with a decrease in the effectiveness of the elimination element of convexity an increase in the effect of the element to remove concavity occurs.
  • This allows continuous or stepped adjustment of Entwölbungs ⁇ unit between two extremenen settings on the Elimination of extreme concavity or convexity extreme.
  • the element for eliminating concavity is a decurling shaft with an axis of rotation extending perpendicular to the transport direction of the paper, the decurling shaft m one or more parallel, mutually parallel, driving it by static friction stretchable Entlbungs ⁇ emen which is immersed between a drive roller and a Deflection roller for the or the decurling belt are stretched in the direction of transport of the paper, the axes of rotation of the drive roller and the deflection roller also extending perpendicular to the direction of transport of the paper, so that the or the decurling belt in a convex shape rests or abuts the decurling shaft.
  • the concavity is eliminated by grasping the concave paper to be smoothed between the decurling belt or belts and the decurling shaft immersed therein with a suitable immersion depth t and bending convexly, that is to say in the opposite direction, between the belt and shaft.
  • the element for eliminating convexity is expediently an outlet contour which is concavely shaped in the transport direction of the paper and which can be swiveled through the paper path through an angle.
  • the convex paper is deformed in the opposite direction by the concavely curved outlet contour, which is pivoted out by a suitable pivoting angle ⁇ , whereby smoothing is achieved.
  • the element for removing concavity and the element for removing concavity are arranged in a particularly advantageous embodiment.
  • the linkage is expediently pivoted by a toothed segment rigidly connected to the linkage via a pinion of an actuating motor.
  • This configuration is particularly simple and enables the paper to be continuously decurled by a corresponding one-time rotation of the tooth segment.
  • an uncomplicated automatic readjustment of the decurling unit can take place as a function of one or a combination of the parameters "initial curling state of the paper", "selected printing mode” or “paper quality” by directly actuating the servomotor.
  • the decurling device is continuously adapted to the curling condition of the wound paper at the printer entrance.
  • FIG. 1 is a schematic representation of the
  • FIG. 2 shows a sectional view of a preferred decurling unit according to the invention in a first setting
  • FIG. 3 shows a sectional view of the preferred decurling unit according to the invention in a second setting
  • Fig. 4 shows a printer with integrated
  • Fig. 5 shows the printer of Fig. 4 with a special
  • Fig. 1 shows schematically the smoothing process for concave paper a and convex paper b, which is ejected from a fixing station F.
  • the decurling unit E converts the concave or the convex paper into smooth paper c.
  • a concave (downward) arched sheet of paper which is brought along in the direction of Rl is covered on its leading edge by the rubber-like Exercise belt 4 and the adjacent and driven by him decurling shaft 8 detected and drawn in between.
  • An opposite curvature is forced on the initially concavely curved sheet of paper during transport between the belt 4 and the shaft 8, as a result of which the initial concave curvature is eliminated.
  • the greater the depth of penetration tl the stronger the effect of removing concavity.
  • An outlet contour 12 with a concave curvature is pivoted downwards by a swivel angle ⁇ l. It is an element for eliminating convexity.
  • the sheet of paper brought up by the element for eliminating concavity is here curved in the opposite direction to a possibly existing convex curvature of the paper. The larger the swivel angle ⁇ l, the weaker the effect of eliminating convexity.
  • the decurled paper is forwarded in the R2 direction.
  • Both the decurling shaft 8 and the outlet contour 12 are rigidly connected to an axis of rotation A about which the linkage 10 can be pivoted.
  • the pivoting of the linkage 10 counterclockwise causes an increase in the depth of penetration tl and the pivoting angle ⁇ l, whereby the component for removing the concavity is strengthened and the component for removing the convexity is weakened. Therefore, by pivoting the linkage counterclockwise, a suitable setting for removing incoming paper with increasing concavity can be achieved.
  • This setting is made via a toothed segment 10a which is rigidly connected to the linkage 10 and which engages with a pinion 14a of a servomotor 14.
  • FIG. 3 shows a sectional view of a preferred embodiment of the decurling unit in a second setting.
  • the drive roller 2 and the deflection roller 6 in turn tension the one or more decurling belts 4.
  • the decurling shaft 8 is immersed here in the tensioned decurling belt 4 with an immersion depth t2 which is smaller than the immersion depth tl of FIG. 1.
  • a zoom run along the direction Rl upwardly convex curved sheet of paper is wave at its leading edge from the generator driven by the rubber-like Entwolbungsriemen 4 Entwolbungs ⁇ detected 8 and fed therebetween.
  • the initially convexly curved sheet of paper is forced only a weak convex curvature during transportation between the belt 4 and the shaft 8, thereby The initial convex curvature at least not ⁇ is enhanced.
  • the outlet contour 12 with its concave curvature is now pivoted downwards by a pivoting angle ⁇ 2 which is smaller than the pivoting angle ⁇ l from FIG. 1.
  • the sheet of paper brought up by the element for eliminating concavity is here curved in the opposite direction to a possibly existing concave curvature of the paper.
  • Swiveling the linkage 10 clockwise causes the depth of penetration t2 and the pivoting angle ⁇ 2 to decrease, thereby weakening the concavity removal component and strengthening the convexity removal component. Therefore, by swiveling the linkage clockwise, a suitable setting for removing incoming paper with increasing convexity can be achieved. This setting is made via the toothed segment 10a which is rigidly connected to the linkage 10 and which engages with the pinion 14a of the servomotor 14m.
  • FIG. 4 shows a printer with integrated decurling units E, which are connected in the paper paths of two printing units, each with a fixing station F.
  • the compactness of the decurling units E becomes clear here.
  • FIG. 5 shows a printer arrangement when using roll paper R.
  • the decurling unit E at the printer input behind the cutting unit S is continuously readjusted.
  • the winding diameter of the roll of roll paper R is detected by means of a rotary encoder D with an extension lever and serves as the basis for controlling the stepping motor of the decurling unit E.
  • the paper quality is first selected by the operator on a control panel of the device via a constant, which presets the control of the servomotor 14, and is secured by test prints.
  • the additional readjustment of the decurling unit in accordance with the printing mode and the resulting runs through the printing units is then carried out automatically via the actuation of the servomotor 14 similar to the actuation described in FIG. 5 on the basis of the winding diameter.

Landscapes

  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

La présente invention concerne un dispositif de décambrage du papier acheminé en provenance d'une station de fixage et présentant un bombement convexe ou concave provoqué par l'opération de fixage, le sens du bombement étant parallèle à la direction de transport du papier. Le dispositif de décambrage contient un élément réglable (12) pour éliminer la convexité, combiné avec un élément réglable (2, 4, 6, 8) pour éliminer la concavité. Le papier devant être décambré passe par ces deux éléments.
EP97946733A 1996-10-22 1997-10-20 Dispositif de decambrage d'un materiau de support Expired - Lifetime EP0934223B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19643667 1996-10-22
DE19643667 1996-10-22
PCT/DE1997/002419 WO1998017566A1 (fr) 1996-10-22 1997-10-20 Dispositif de decambrage d'un materiau de support

Publications (2)

Publication Number Publication Date
EP0934223A1 true EP0934223A1 (fr) 1999-08-11
EP0934223B1 EP0934223B1 (fr) 2002-01-30

Family

ID=7809514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97946733A Expired - Lifetime EP0934223B1 (fr) 1996-10-22 1997-10-20 Dispositif de decambrage d'un materiau de support

Country Status (4)

Country Link
US (1) US6199859B1 (fr)
EP (1) EP0934223B1 (fr)
DE (2) DE59706262D1 (fr)
WO (1) WO1998017566A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6782822B2 (en) * 2000-02-23 2004-08-31 Agfa-Gevaert Compact printing apparatus and method
US6991130B2 (en) * 2002-09-13 2006-01-31 Avery Dennison Corporation Versatile label sheet and dispenser
US7128236B2 (en) * 2002-09-13 2006-10-31 Avery Dennison Corporation Versatile label sheet and dispenser
JP4162004B2 (ja) * 2005-12-13 2008-10-08 コニカミノルタビジネステクノロジーズ株式会社 画像形成装置、画像形成方法及びシート材搬送装置
JP4983623B2 (ja) * 2008-01-29 2012-07-25 Ｎｋワークス株式会社 デカール機構
JP2009179415A (ja) * 2008-01-29 2009-08-13 Noritsu Koki Co Ltd ペーパー排出機構
DE102010016817A1 (de) 2010-05-06 2011-11-10 OCé PRINTING SYSTEMS GMBH Anordnung zum Übertragen von Tonerbildern auf ein bahnförmiges Trägermaterial unter Verwendung eines vorbestimmten Umschlingungswinkels
US11938699B2 (en) 2021-07-07 2024-03-26 Brown Llc Methods and systems for producing pressware
US11945670B2 (en) * 2021-07-07 2024-04-02 Brown Llc Methods and systems for producing pressware
US11919270B2 (en) 2021-07-07 2024-03-05 Brown Llc Methods and systems for producing pressware

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737089A (en) * 1953-10-21 1956-03-06 John R Baumgartner Apparatus for decurling a web
US4360356A (en) * 1980-10-15 1982-11-23 The Standard Register Company Decurler apparatus
WO1989006634A1 (fr) 1988-01-15 1989-07-27 Emf Corporation Appareil de triage pour feuilles de papier
US4952281A (en) * 1988-05-10 1990-08-28 Kobayashi Engineering Works, Ltd. Sheet curls reformer
US5183454A (en) * 1989-11-10 1993-02-02 Hitachi Koki Co., Ltd. Paper curl correction apparatus
JPH04338060A (ja) * 1991-05-14 1992-11-25 Fuji Xerox Co Ltd 用紙のカール低減装置
JPH05221574A (ja) 1991-08-14 1993-08-31 Fuji Xerox Co Ltd 用紙のカール補正装置
JP2737504B2 (ja) 1992-01-08 1998-04-08 日本電気株式会社 ロール紙のカール解消装置
US5153662A (en) * 1992-04-06 1992-10-06 Xerox Corporation Sheet decurling apparatus
US5202737A (en) * 1992-06-12 1993-04-13 Xerox Corporation Method and apparatus for decurling sheets in a copying device
US5565971A (en) * 1994-10-03 1996-10-15 Xerox Corporation Pivotal bi-directional decurler
US5539511A (en) * 1994-12-16 1996-07-23 Xerox Corporation Multilevel/duplex image sheet decurling apparatus
DE29503120U1 (de) 1995-02-24 1996-06-27 Böwe Systec AG, 86161 Augsburg Glättvorrichtung für eine Papierbahn in einer papierverarbeitenden Maschine
US5717836A (en) * 1995-03-09 1998-02-10 Matsushita Electric Industrial Co., Ltd. Printing apparatus having a retractable curl removal member and reversible roller
US6064853A (en) * 1999-09-10 2000-05-16 Lexmark International, Inc. Apparatus for curling materials

Non-Patent Citations (1)

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Title
See references of WO9817566A1 *

Also Published As

Publication number Publication date
DE59706262D1 (de) 2002-03-14
EP0934223B1 (fr) 2002-01-30
DE19781151D2 (de) 1999-09-23
US6199859B1 (en) 2001-03-13
WO1998017566A1 (fr) 1998-04-30

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