EP0289217B1 - Apparat zum Transportieren von Bögen - Google Patents

Apparat zum Transportieren von Bögen Download PDF

Info

Publication number
EP0289217B1
EP0289217B1 EP19880303606 EP88303606A EP0289217B1 EP 0289217 B1 EP0289217 B1 EP 0289217B1 EP 19880303606 EP19880303606 EP 19880303606 EP 88303606 A EP88303606 A EP 88303606A EP 0289217 B1 EP0289217 B1 EP 0289217B1
Authority
EP
European Patent Office
Prior art keywords
sheet
rollers
sheets
tray
nip
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 - Lifetime
Application number
EP19880303606
Other languages
English (en)
French (fr)
Other versions
EP0289217A1 (de
Inventor
Denis Joseph Stemmle
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Publication of EP0289217A1 publication Critical patent/EP0289217A1/de
Application granted granted Critical
Publication of EP0289217B1 publication Critical patent/EP0289217B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/12—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers
    • B65H29/14—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers and introducing into a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4214—Forming a pile of articles on edge
    • B65H2301/42146—Forming a pile of articles on edge by introducing articles from above
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/142—Roller pairs arranged on movable frame
    • B65H2404/1421—Roller pairs arranged on movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis
    • B65H2404/14211—Roller pairs arranged on movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis the axis being one the roller axis, i.e. orbiting roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/06—Office-type machines, e.g. photocopiers

Definitions

  • This invention relates to a sheet transporting apparatus particularly, although not exclusively, useful for delivering the copy sheets in a copying machine.
  • the apparatus is of the kind which includes a pair of rollers forming a sheet feeding nip, and may advantageously be used in conjunction with a sheet receiving means for receiving successive sheets fed from the nip.
  • Such a sheet transporting apparatus is commonly used in xerographic copiers, in conjunction with stack receiving means comprising a tray which receives copy sheets fed out in a generally horizontal direction, the tray often being inclined either upwardly or downwardly in the direction of sheet feed.
  • the angle of inclination is usually less than 45°.
  • the copy sheets are fed out of the processor of a copier in a face-up orientation, and will frequently leave the processor with their imaged faces in the order 1-n, assuming an input sequence of documents being copied which are copied in that order.
  • US-A-4 647 032 describes a device for turning over paper sheets in which the leading edge of a sheet is fed horizontally between fixed axis rollers to a sheet turning arrangement.
  • the sheet turning arrangement comprises a rotating endless belt having projections which engage the leading edges of sheets and carry them round through at least 90° before releasing them, inverted, into a catch tray.
  • a sheet inverter in a copier is described in GB-A-1 475 094.
  • a pair of feed rollers are mounted in a frame, to enable rotation of the entire roller pair about an axis through the nip.
  • Another problem encountered with a sheet transporting apparatus which is arranged to collect sheets in a tray is the difficulty of feeding sheets of different lengths into the tray. If the sheet transporting arrangement which feeds sheets into the tray is sufficiently far from the end stop of the tray to accommodate the longest sheets to be fed, then shorter sheets to be fed may fall short and may not reach the end stop, or may collide with the trailing edges of previously stacked sheets, even if, as is commonly the case, the catch tray slopes 'downhill' from the sheet entry point. Conversely, if the sheet transporting arrangement is closer to the end stop, so that shorter sheets are stacked correctly, then it will not be possible to stack sheets longer than a certain length.
  • the present invention is intended to provide a relatively simple, yet reliable, way of forming a 1-n output stack from a 1-n input sequence as well as to enable a range of sheet sizes to be stacked reliably into a conventional tray.
  • a sheet transporting apparatus including a pair of rollers forming a sheet transporting nip, and adapted, when in an initial position, to engage the leading edge of a sheet delivered thereto, characterised by means arranged to produce an oribital motion of the rollers one about the other so as to progressively change the direction of motion of the sheet while the sheet is advancing through the nip.
  • the nip between the rollers, in its initial position is oriented so as to receive a sheet delivered thereto in a generally horizontal direction, and at the position in said orbital motion furthest from the initial position is oriented so that it is advancing the sheet generally vertically downwards.
  • the apparatus is suitably used in conjunction with a generally vertical sheet receiving tray to provide a sheet inverting stacker.
  • the sheet receiving tray is inclined closer to a horizontal orientation (preferably uphill) and the nip makes an orbital motion to a position somewhere between 90° and 180° from its initial position, thereby inverting the sheets into a generally horizontal stack.
  • the sheet transporting apparatus is used in conjunction with a generally horizontal sheet receiving tray to provide a sheet stacking apparatus capable of reliably stacking sheets over a wide range of sheet lengths without any adjustments being needed to the locations of the rollers or the tray.
  • the apparatus of the invention is a simple, reliable, and compact apparatus, and has very good tolerance to a wide range of paper weights and sizes.
  • a copying machine 10 such as a xerographic copying machine, delivers copy sheets 11 through the sheet feeding nip 12 of a pair of feed rollers 13, 14 into a compiler tray 15.
  • the lower roller 13 is a driven roller, and the upper roller 14 is an idler.
  • the copy sheets 11 are delivered, face-up, in succession towards the nip 12 in a generally horizontal orientation.
  • a sensor 16 such as a micro switch or an electro-optic sensor, detects the leading edge 17 of the sheet 11 and activates a cam-operated orbiting roller mechanism or other suitable drive mechanism such as the belt drive to be described below.
  • This mechanism causes the upper roller 14 to move angularly around the lower roller 13 in the clockwise direction, in orbital fashion. This orbital motion takes place during sheet feeding by the rollers, the nip 12 producing generally horizontal feeding of the sheet 11 as its leading edge passes between the rollers, as shown in Figure 1b.
  • the shroud 18 of the upper roller 14 moves with the roller throughout.
  • the feed rollers contine to feed the sheet 11 as the upper roller 14 continues its orbital motion until the nip 12 is substantially vertical, as shown in Figure 1c, at which point the sheet 11 is being fed substantially directly downwards.
  • the upper roller 14 dwells in this position (due to the configuration of the cam mechanism) until the leading edge 17 of the sheet 11 contacts the base 19 of tray 15 ( Figure 1d).
  • the orbital motion of the upper roller 14 (and shroud 18) is reversed, so that its axis starts to move anti-clockwise around the lower roller, although the lower roller 13 continues to be driven in the sheet feed direction thereby forming a buckle in the sheet 11 as seen in Figure 1d.
  • the trailing edge 20 of sheet 11 is fed through the nip 12 as the roller 14 returns towards its starting position, thereby directing the trailing edge of the sheet generally horizontally towards the upper part of the tray, effectively "peeling" the sheet 11 into the tray 15.
  • a stack corrugation tongue 21 is pivotally mounted adjacent the base 19 of the tray 15, and is moved into and out of pressing engagement with the sheets in tray 15 by a driving arrangement linked with the mechanism causing the orbital motion of the upper roller 14.
  • the stack corrugation tongue 21 presses the sheets in tray 15 towards the rear of the tray, the tray and the tongue being so shaped as to form a vertically-extending corrugation in the sheets. This provides beam strength to the stack, which enables the stack to stand on its edge.
  • a side tamping arm 22 ( Figures 3, 4) which is activated after a sheet has been discharged from the nip 12 but before the stack corrugation tongue 21 contacts the set. This action accurately aligns the vertical edges of the stack of sheets in the tray 15.
  • the sheet stacking apparatus of the invention is incorporated in a finisher station 30 for a xerographic copier 10.
  • the compiler tray 15 of Figure 1 is represented by two fold-down partial trays constituted by set support arms 15a, 15b.
  • the corrugations produces by stack corrugation tongue 21 are formed by pressing the tongue into the space between the two set support arms 15a, 15b.
  • set support arms 15a, 15b are folded down, causing the set to drop into a larger capacity catch tray 31.
  • An offsetting function can be introduced by causing the tamping arm to move alternate compiled sets of copies by a greater distance than the other sets.
  • incoming sheets arrive with their registration edges at a first position, and are moved by the tamping arm 22 to either one of two second positions. Compiled sets are then passed, prior to discharge, to alternate offset positions on catch tray 31.
  • a stapler 32 may be provided adjacent the lower corner of the compiler tray into which the copy sheets are registered.
  • the stapler is activated, and the tamper arm is then moved so as to push the stapled set out of the stapler throat to one of the two offset positions.
  • the stapler is arranged, as seen in Figure 3, so that its anvil 33 is on the machine side of the compiler tray, with the moving parts and the driving mechanis 34 located within a housing 35 ( Figure 2).
  • FIG. 5 An example of a driving arrangement for the orbiting rollers is illustrated in Figure 5.
  • Driven rollers 13 and idler rollers 14 are carried respectively on drive shaft 40 and idler shaft 41.
  • Shaft 40 is journaled for rotation in end members 42 and 43 of support frame 44, and is driven by drive pinion 45 which in turn is driven by, for example, drive belt 46.
  • the drive rollers 13 rotate, causing rotation of the idler rollers 14 by frictional engagement, the idler rollers 14 either being journaled for rotation on idler shaft 41, or being fixed to shaft 41 which is then journaled for rotation in end members 42 and 43 of frame 44.
  • the frame 44 In order to produce orbital motion of the idler rollers 14 about thee axis of driven rollers 13, the frame 44 is caused to make angular movements about the axis of drive shaft 40.Angular movement of the frame 44 is achieved by means of a drive pinion 47 secured to end member 42, the drive shaft 40 being journaled for rotation relative to the drive pinion 47.
  • a drive belt 48 engages pinion 47, and is operated to cause angular motion of the pinion 47, and hence the frame 44.
  • FIG. 6 a xerographic copying machine which has a duplex copying facility uses a buffer tray that incorporates a sheet transporting apparatus according to the invention.
  • Figure 6 shows (diagrammatically) only those components which are involved in the movement of copy paper sheets through the apparatus.
  • a copy sheet is fed, by a feed roller 50, from a stack 51 of sheets supported on an elevating stack carrier 52.
  • the sheet as indicated by arrow A, is guided to a pair of primary transport rollers 53, and then, as indicated by arrow B is guided to a second pair of transport rollers 54.
  • the transport rollers 54 convey the sheet (arrow C) to a xerographic transfer station 55 where a developed electrostatic latent image is transferred from a photoreceptor belt 56 on to the upper surface of the copy sheet.
  • the sheet carrying the transferred image as indicated by arrow D, then passes through a fuser 57 comprising a heated roller and a backup roller.
  • the fuser 57 fixes the developed image on to the upper surface of the copy sheet, which is then guided to output rollers 58, as indicated by arrow E.
  • the sheet is transported completely through the output rollers 58, as shown by arrow F, and into a suitable output tray (not shown). If, however, images are to be formed on both sides of the sheet (i.e. a duplex copy), then the sheet is recirculated so that it can receive an image on its other side, as will now be described.
  • the sheets are held following the imaging of the first sides in a duplex buffer tray 63.
  • the gate 61 is raised, as shown in broken outline, so that the sheets are fed into the buffer tray (arrows L) for sheets less than a predetermined length, the axes of the rollers 60 remain stationary throughout the feeding of sheets into the buffer tray 63.
  • a stack of sheets is formed in the buffer tray 63, and an elevating base brings the top sheet in the stack into engagement with buffer tray feed roller 64. Sheets fed by the buffer tray feed roller 64 are guided (arrow Q) up to primary feed rollers 53 to make a second pass in the fashion just described for the single copy duplex mode.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pile Receivers (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Claims (10)

1. Blattfördergerät
   mit zwei Rollen (13, 14), die eine Blattförderklemme (12) bilden und in ihrer Ausgangsstellung den Vorderrand (17) eines ihr zugelieferten Blattes (11) ergreifen, dadurch gekennzeichnet,
   daß Hilfsmittel (44, 47) derart angeordnet sind, daß eine Bahnbewegung der Rollen umeinander entsteht, um fortschreitend die Bewegungsrichtung des Blattes abzuändern, während sich das Blatt gerade durch die Klemme vorschiebt.
2. Gerät des Anspruches 1, bei dem die Rollen (13, 14) derart angeordnet sind, daß die Bahnbewegung um die Achse (40) der einen Rolle (13) entsteht
3. Gerät des Anspruches 1 oder Anspruches 2, bei dem von den Rollen (13, 14) zusätzlich die Blätter (11) in einer Weise beförderbar sind, daß die Achsen der beiden Rollen ortsfest bleiben.
4. Gerät des Anspruches 3, bei dem die Rollen (13, 14) für eine Beförderung des Blattes (11) anfänglich in der Weise angeordnet sind, daß die Achsen der Rollen ortsfest sind, und dann in der Weise angeordnet sind, daß die Rollen die Bahnbewegung ausführen.
5. Vorrichtung zum Stapeln von Blättern mit einem Blattfördergerät eines der Ansprüche 1 bis 4 und mit einer Blattaufnahmeschale (15), in der die von den Rollen beförderten Blätter aufnehmbar sind.
6. Vorrichtung des Anspruches 5 in Abhängigkeit von dem Anspruch 3, bei der das Blattfördergerät für einen alleinigen Betrieb bei ortsfester Achse mit Blättern von einer geringeren als einer vorherbestimmten Länge angeordnet ist, um erst mit ortsfesten Achsen und dann mit der Bahnbewegung Blätter zu verarbeiten, deren Länge zumindest gleich der vorherbestimmten Länge ist.
7. Vorrichtung eines der Ansprüche 1 bis 6, bei der die Rollen (13, 14) derart angeordnet sind, daß sie die Blätter in einer Blattaufnahmeschale niederlegen, und bei der der Abstand zwischen der Klemme (12) und dem entfernten Ende (19) der Schale, gemessen in der anfänglichen Richtung der Blattbewegung in die Klemme, geringer als die Länge der längsten Blätter ist, die von der Schale angenommen werden können, wobei die Hinterränder (20) der längsten Blätter nach ihrer Ablage in der Schale sich über die Klemme in einer Richtung erstrecken, die zu der anfänglichen Richtung der Blattbewegung im allgemeinen entgegengesetzt ist.
8. Vorrichtung eines der Ansprüche 1 bis 4, bei der die Rollen derart angeordnet sind, daß die Richtung der Bahnbewegung bei dieser Arbeitsweise während der Beförderung eines Blattes umgekehrt ist.
9. Vorrichtung eines der Ansprüche 1 bis 4 und 8, bei der die anfängliche Stellung der Rollen und die Stellung der Rollen am Ende der Bahnbewegung oder -bewegungen derart sind, daß ein von ihnen befördertes Blatt umgewendet wird.
10. Vorrichtung des Anspruches 9, bei der die Klemme (12) in ihrer anfänglichen Stellung derart orientiert ist, daß sie ein zu ihr geliefertes Blatt (11) in einer etwa horizontalen Richtung aufnimmt, und bei der Stellung in der Bahnbewegung, die von der anfänglichen Stellung am weitesten weg ist, während des Vorschubs des Blattes im allgemeinen vertikal nach unten orientiert ist.
EP19880303606 1987-04-23 1988-04-21 Apparat zum Transportieren von Bögen Expired - Lifetime EP0289217B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB878709616A GB8709616D0 (en) 1987-04-23 1987-04-23 Sheet transporting apparatus
GB8709616 1987-04-23

Publications (2)

Publication Number Publication Date
EP0289217A1 EP0289217A1 (de) 1988-11-02
EP0289217B1 true EP0289217B1 (de) 1992-03-04

Family

ID=10616216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880303606 Expired - Lifetime EP0289217B1 (de) 1987-04-23 1988-04-21 Apparat zum Transportieren von Bögen

Country Status (4)

Country Link
EP (1) EP0289217B1 (de)
JP (1) JP2613912B2 (de)
DE (1) DE3868681D1 (de)
GB (1) GB8709616D0 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68923066T4 (de) * 1988-11-26 1996-02-15 Canon Kk Vorrichtung zur Bogenweiterverarbeitung und Vorrichtung zur Bilderzeugung.
JP2794428B2 (ja) * 1988-12-12 1998-09-03 キヤノン株式会社 シート搬送装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413238A1 (de) * 1983-04-11 1984-10-25 Gradco Systems, Inc., Santa Ana, Calif. Bogensortiervorrichtung
JPS61114959A (ja) * 1984-11-07 1986-06-02 Tokyo Electric Co Ltd 事務機の用紙排出装置

Also Published As

Publication number Publication date
JP2613912B2 (ja) 1997-05-28
GB8709616D0 (en) 1987-05-28
EP0289217A1 (de) 1988-11-02
DE3868681D1 (de) 1992-04-09
JPS63288858A (ja) 1988-11-25

Similar Documents

Publication Publication Date Title
US4858909A (en) Sheet transporting apparatus
JP2693520B2 (ja) 複写機の自動反転原稿給紙装置
US7331572B2 (en) Sheet finisher and image forming system using the same
EP0576235B1 (de) Ausgabevorrichtung zum Stapeln von Bögen mit deren Vorderseite nach oben oder unter mit einem auf einer Kreisbahn in mehrere Stellungen bringbaren Walzenspalt
EP0349012B1 (de) Papierzufuhrvorrichtung
US6264194B1 (en) Sheet handling device and images forming apparatus using the device
US4184671A (en) Automatic document handler in duplex copying machine
JP2520436B2 (ja) シ―ト搬送・整合装置
JP2003335449A (ja) シート積載整合装置、シート処理装置、及び画像形成装置
GB2082551A (en) Laterally offsetting and stacking sheets
EP0702276B1 (de) Blattsortierungsgerät
US5141215A (en) Sorter-finisher provided for an image forming apparatus
US4866487A (en) Image forming apparatus
JP3273465B2 (ja) シート処理装置およびこれを備えた画像形成装置
JP3208674B2 (ja) 画像記録装置
EP0289217B1 (de) Apparat zum Transportieren von Bögen
US5449163A (en) Full productivity high performance inverter
US5499811A (en) Sheet post-processing apparatus
US6353727B1 (en) Image forming apparatus having staple processing section
US5961111A (en) Sheet feeding device for a duplex image forming apparatus
JPH02223964A (ja) コピー用紙ずらし機構を備えた複写機
US5133539A (en) Sorter-finisher provided for an image forming apparatus
EP0122992B1 (de) Blattsammelgerät
JP2003081529A (ja) 用紙折り装置および後処理装置
JP2006193283A (ja) シート後処理装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19890428

17Q First examination report despatched

Effective date: 19900808

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 3868681

Country of ref document: DE

Date of ref document: 19920409

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030408

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030416

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030502

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040421

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041103

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040421

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041231

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST