US3729188A - Document stacker apparatus - Google Patents

Document stacker apparatus Download PDF

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Publication number
US3729188A
US3729188A US00823865A US3729188DA US3729188A US 3729188 A US3729188 A US 3729188A US 00823865 A US00823865 A US 00823865A US 3729188D A US3729188D A US 3729188DA US 3729188 A US3729188 A US 3729188A
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US
United States
Prior art keywords
documents
stack
document
stacking
belt
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
US00823865A
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English (en)
Inventor
P Stephenson
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
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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.)
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Publication date
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Publication of US3729188A publication Critical patent/US3729188A/en
Anticipated expiration legal-status Critical
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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/02—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier having longitudinal dimension comparable with transverse dimension, e.g. punched card
    • G06K13/08—Feeding or discharging cards
    • G06K13/12—Feeding or discharging cards from conveying arrangement to magazine
    • 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
    • B65H29/16—Delivering or advancing articles from machines; Advancing articles to or into piles by contact of one face only with moving tapes, bands, or chains
    • B65H29/18—Delivering or advancing articles from machines; Advancing articles to or into piles by contact of one face only with moving tapes, bands, or chains 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
    • B65H31/00—Pile receivers
    • B65H31/04—Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/08—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another
    • B65H31/10—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another and applied at the top of the 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
    • B65H31/00—Pile receivers
    • B65H31/24—Pile receivers multiple or compartmented, e.d. for alternate, programmed, or selective filling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/34—Apparatus for squaring-up piled articles
    • B65H31/36—Auxiliary devices for contacting each article with a front stop as it is piled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/30—Other features of supports for sheets
    • B65H2405/33—Compartmented support
    • B65H2405/331—Juxtaposed compartments
    • B65H2405/3311—Juxtaposed compartments for storing articles horizontally or slightly inclined

Definitions

  • ABSTRACT Document stacker apparatus wherein transport belts are continuously in contact with documents as they are transported to a stacking bin. At the stacking bin, roller means forces the trailing edge of the document downwards so that it does not interfere with the leading edge of a succeeding document.
  • a critical problem associated with stacking flexible sheets or documents transported at high speeds is to prevent the trailing edge of a sheet from interferring with the leading edge of the succeeding sheet, thereby preventing the succeeding sheet from bending, being deformed or even jamming the stacking system.
  • Prior arrangements for overcoming this problem have included techniques for providing positive control of both edges of each document by mechanically engaging both ends thereof, by utilizing vacuum forces to maintain the document in contact with a moving conveyor, and by electrostatically tacking the documents to a transport belt.
  • Each of the aforementioned prior art arrangements have disadvantages associated therewith. For example, in order to mechanically engage both edges of a document, additional mechanical elements are introduced into the system which may add to the possibility of a malfunction. The vacuum systems have undesirable aspects in performance.
  • xerographic apparatus for example, if a document is placed under the influence of a vacuum suction originating along the longitudinal spaces between the transport belts and parallel to the direction of movement, the document will maintain its relation to the sources of suction throughout its advancement along the transport path. This means that if a crinkled onionskin document is conveyed and its crinkles are parallel to the areas of suction, the crinkles will be preserved while the document, as a whole, is flat with the moving belts. If the crinkles are significant, then those crinkled areas existing between sources of suction may be outside the depth of field of a lens system which focuses the document image onto a lightsensitive receptor, thereby distorting the copies. In order to electrostatically tack documents to a transport belt, a electrostatic tacking device, such as a conventional corotron, is obviously required. Once the documents reach the stacking. area, additional apparatus is required to strip the tacked documents from the transport belt.
  • the present invention relates to improved stacking apparatus and in particular, stacking apparatus which stacks documents at very high speeds.
  • the documents are transported to a stacking bin by a belt transport system wherein the documents are continuously in contact with the belt.
  • a roller adjacent thereto forces the trailing edge of the document downward onto the stack,
  • FIG. 1 is a block diagram of a system wherein the novel stacker apparatus of the present invention may be utilized
  • FIG. 2 is a diagramatic plan view of the stacker apparatus of the present invention.
  • FIG. 3 is a diagrammatic plan view of another embodiment of the novel stacker apparatus.
  • FIG. I there is shown a schematic block diagram illustrating the system environment in which the novel stacker apparatus of the present invention may be utilized.
  • the stacker of this invention may be used for high speed stacking of virtually any type of cut sheets which can be fed through it.
  • a printer unit 10 receives coded input information from a data transmission systemQsuch as a digital computer, and translates the computer output information into hard, or permanent, documents. The documents are cut to a desired lerigth by a cutter system, illustrated in FIG. 1 as part of the printer unit 10.
  • the printer unit 10 may include a cathode ray tube coupled to the output of the digital computer for displaying the output thereof.
  • the cathode ray tube output may be made permanent by projecting the displayed output onto a electrostatically charged photosensitive medium which is then developed and transferred to a recording medium according to known xerographic techniques.
  • the recording medium is cut into documents, or sheets, 12 and are transported on belt 14 to the novel stacker apparatus 16 of the present invention which will be described in more cletail hereinafter with reference to FIGS. 2 and 3.
  • the various printing and cutting operations are controlled by printer/cutter control logic 18 which transmits command signals via lead 20 to the printer unit 10.
  • the stacker apparatus 16 is controlled by stacker control logic 22.
  • stacker control logic 22 interact via signals on leads 24 and 26 to control the operation of the system.
  • the output from the stacker control logic 22 controls a stacker gate within stacker apparatus 16 via a signal generated on lead 28,. the stacker gate diverting the documents into predetermined stacking bins as will be described hereinafter.
  • a stacker tray driving mechanism 30, the output of which drives stacking trays within stacker apparatus 16, is controlled via a signal on lead 32.
  • the stacking tray position within stacker apparatus 16 is monitored by a plurality of switches mounted to stacker apparatus 16, the signals appearing at the output of the switches being transmitted to the stacker control logic 22 via lead 34.
  • FIG. 2 there is shown a diagramatic plan view of stacker apparatus 16.
  • the documents are transported via transport belt 14 to stacking device 16 as shown in FIG. 1.
  • the documents are transported by belt 52 to a guide member, such as a baffle 54, and are guided thereby to the entrance 56 of a stacker unit indicated generally by reference numeral 60.
  • Transport belts 62 and 64 engage each document 12 as it reaches entrance 56 and the document is transported thereby to stacker bin 96.
  • Driver roller 66 energized by motor 67, drives belt 62 around guiderollers 68, 70 and 72.
  • the guide rollers are arranged so that belt portion 62' guides the documents so that they enter the stack at an angle to the top of the stack 13.
  • the continuous positive influence of belt portion 62' on each document entering the stack 13 prevents interleaving and jamming and enables the documents to be handledgently, with little curling or warping.
  • the belt portion 62 transports the documents as they enter stacker bin 96 against stacker back plate 80, squaring the documents thereagainst as the stack is formed.
  • roller 70 acts to force, or snap, the trailing edge of each document 12 down on the top of the stack 13,
  • the angle 0 at which each document enters stack 13, such that the entering document strikes the stack away from the trailing edge thereof, is effective to prevent the trailing edge of the document on top of the stack from interfering with the leading edge of the entering document, thereby preventing a jam in the document transport system.
  • belt portion 62' is preferably maintained in contact with the top of the stack 13, since the action of roller 70 in forcing the trailing edge of each entering document shown on the stack is enhanced thereby.
  • Aplurality of magnetic reed switches 84 and 88 may be mounted to the inside edge of stacking bin 96 for locating the position of a stacking tray 98, which, in combination withback plate 80, forms stack 13.
  • the backplate 80 may comprise movable guides so that varying document lengths may be stacked properly.
  • the stacking tray 98 is movably mounted within the stacking bin 96. Mounted to one end of tray 98 is a magnet 100,. the magnet shunting the magnetic reed switches as the tray traverses the stacking bin 96 inthe direction indicated by arrow 102.
  • the switches indicate the position of tray-98 and when they are shunted by magnet 100, the switches are closed. When the switches are closed electrical signals appear at the output leads thereof and are coupled to the stacker control logic 22 via OR gate and lead 34.
  • the control logic unit 22 in response to the signals fed thereto by the switches, controls the stacker tray driving mechanism 30 via a control signal generated on lead 32. As shown in FIG.
  • the stacking tray driving mechanism comprises a slow speed motor 110, the output shaft 112 thereof being coupled to the input hub of clutch 114.
  • the output hub of clutch 114 is coupled to the driving shaft 115 of motor 116.
  • Shaft 115 is connected to a gearing mechanism 118 which couples the shaft to a driving mechanism 120, which may comprise, for example,.a chain 122 driven around pulleys 124 and 126.
  • the tray 98 is mounted to the driving chain 122 via connecting means 128.
  • Means are provided for controlling the height of stack 13 so that the stacker presents a common face to all documents.
  • a microswitch 83 may be provided to detect the change in the stack height. The buildup of the. stack height occurs as documents are added to the stack 139A pivotable extension 86 is rotated when the document stack reaches a pre-determined level, causing switch 83 to close, thereby signalling control logic unit22 via gate 85 and lead 34.
  • control logic unit 22 In response thereto, control logic unit 22 generates signals on leads 32a and 32b to energize the slow speed motor and engage clutch 114, respectively, thereby drivingshaft of motor 116.
  • Shaft 115 rotates in a direction such that gearing mechanism 118 and chain 122 drives tray 98 a predetermined distance downwards, thereby lowering stack tray 98 until pivotable extension 86 returns to its initial position, thereby opening switch 83 and deenergizing motor 110 and disengaging clutch 114.
  • the slow speed motor 110 is not continuously engaged but is periodically indexed downward to maintain a constant stack level.
  • An alternate technique which may be utilized to control the height of stack 13 is described in U.S. Pat. No. 3,301,126. Photoelectric apparatus also may be utilized to detect and then control the height of the stack.
  • Reed switch 84 may be positioned to correspond to a stacker full condition. Therefore, when tray 98 reaches a position such that magnet 100 shunts switch 84, a signal is generated at the output thereof and coupled to stacker control unit 22 via gate 85 and lead 34.
  • Control logic unit 22 in response thereto, generates a control signal on lead 28 which actuates a solenoid 130. Solenoid is coupled to a member 132 having a finger-like extension 134. The actuation of solenoid 130 causes extension 134 to be interposed in the path of the documents being transported on belt 14.
  • the description of stacker unit 140 will, therefore, be omitted to avoid redundancy.
  • the system as described hereinabove enables documents or sheets of paper of various lengths to be stacked uniformly in stacking bins at high speeds. Documents traveling at speeds greater than 45 inches per second have been successfully stacked. To illustrate the stacking speed capabilities of the present invention, documents three inches long traveling at 45 inches per second can be stacked at a rate greater than 50,000 documents per hour.
  • the stacking system as described hereinabove has been utilized when the document leave the printer unit face down, the documents being stacked face down in bins 96 and 146.
  • face down is herein defined to mean that the face of the document upon which an electrostatic latent image has been developed is delivered to the stacker transport system or to the stacking bins such that the developed face is positioned facing towards belt 14 while the term face up is defined to mean that developed documentface is positioned facing away from belt 14. If documents emerge from printer unit 10 face up and it is desired to collate the documents in an ordered sequence in both stacker bins, a modification of the system described in FIG. 2 is necessary.
  • the stacker units for stacking documents emerging face up from the printer unit 10 are indicated generally by reference numerals 150 and 170.
  • the documents enter transport belts 152 and 172 with the developed side face up, and are transported to member 154 having a guide finger 156 thereon.
  • the finger 156 guides the documents into a receiving area formed by belts 152 and 158.
  • the documents are inverted and transported to stacking bin 160 and stacked as described hereinabove with reference to FIG. 2, belt portion 152' conveying the documents to back plate 162 and roller 164 forcing down the trailing edge thereof, preventing interference with the leading edge of a succeeding document.
  • solenoid 166 When stacking bin 160 is full, solenoid 166 is disengaged, rotating guide finger 156 away from the transport path of the documents so that they are transported to entrance area 168 of stacking unit 170, wherein the documents are stacked and inverted as described previously.
  • the apparatus of FIG. 3 also performs an additional function other than collating.
  • the documents emerge face up from printer l0 and if they are not inverted; the documents are transported to the stacking bins face up, as described hereinabove with reference to FIG. 2. If the documents have been developed'with toner containing a thermally softenable resin, such as utilized in the xerographic process, toner which has not been totally fused, perhaps due to faulty fusing may be rubbed off when the document is stopped by the back plate 162.
  • the invention described hereinabove provides novel, simple, economical and efficient apparatus for stacking documents at very high speeds.
  • the belt transport system described provides a positive, continuous control over the documents as they enter the stacking area, the control continuing even as the documents enter the stacking bins.
  • This type of positive control substantially reduces the possibility of jamming of the documents as they are transported at high speeds to the stacking bins and also holds each document against a stop member in the bin on top of the stack until a succeeding document is stacked thereupon.
  • Apparatus for stacking documents comprising: a transport system for transporting documents along a transport path to a first stacking bin, said bin including a stacking tray to form a first stack thereon, said transport system comprising a transport belt having a first sloped section for engaging documents delivered thereto and transporting said document to said stack, said documents entering said first stack at an angle thereto, said transport belt having a second section substantially parallel to and in contact with the top of said first stack for engaging documents entering said stack, said documents being under the positive and continuous control of said transport belt, means adjacent said first and second belt sections for applying a force to each document entering said first stack whereby the trailing edge of each document is forced down on top of said first stack, means for stopping said documents as they are transported to said first stack by said second belt section, said documents being held against said stopping means by said second belt section until a succeeding document enters said first stack, means for controlling the height of said first stack,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Pile Receivers (AREA)
US00823865A 1969-05-12 1969-05-12 Document stacker apparatus Expired - Lifetime US3729188A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82386569A 1969-05-12 1969-05-12

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US00823865A Expired - Lifetime US3729188A (en) 1969-05-12 1969-05-12 Document stacker apparatus

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US (1) US3729188A (US08197722-20120612-C00042.png)
CA (1) CA1000311A (US08197722-20120612-C00042.png)
FR (1) FR2042568B1 (US08197722-20120612-C00042.png)
GB (1) GB1303165A (US08197722-20120612-C00042.png)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885664A (en) * 1972-10-05 1975-05-27 Nippon Electric Co Transport-direction reversing apparatus for an automatic mail handling system and the like
US4051957A (en) * 1975-01-21 1977-10-04 Pitney-Bowes, Inc. Container loading system
DE2913077A1 (de) * 1978-04-03 1979-10-11 Hugin Kassaregister Ab Vorrichtung zum zufuehren und stapeln von formularen in einem fach
US4213602A (en) * 1974-07-16 1980-07-22 De Staat Der Nederlanden, Te Dezen Vertegenwoordigd Door De Directeur-Generaal Der Posterijen, Telegrafie En Telefonie Switching device for letters and the like
US4310152A (en) * 1979-03-13 1982-01-12 Gao Gesellschaft Fur Automation Und Organisation Mbh Stacker for flat material
US4507109A (en) * 1981-02-02 1985-03-26 Wully, S.A. Apparatus for reception and transfer of sheet material
US4667953A (en) * 1985-08-28 1987-05-26 Mitsubishi Jukogyo Kabushiki Kaisha Sheet stacker
US4714394A (en) * 1984-04-13 1987-12-22 Winkler & Duennebier Maschinenfabrik Und Eisengieserei Gmbh & Co. Kg Method and appartus for depositing a proper number of flexible work pieces in a proper position
DE4305579A1 (de) * 1993-02-24 1994-08-25 Will E C H Gmbh & Co Vorrichtung zum Ansammeln von Papierbogen
US6082733A (en) * 1997-06-12 2000-07-04 Bobst S.A. Sorting device in a conveyor of plate-like workpieces
US6467605B1 (en) 1971-04-16 2002-10-22 Texas Instruments Incorporated Process of manufacturing
US20120074638A1 (en) * 2010-09-28 2012-03-29 Nakagaki Toshihiro Sheet conveyance device and image forming apparatus
US20130320614A1 (en) * 2010-04-13 2013-12-05 J&L Group International Llc Sheet deceleration apparatus and method
US9045243B2 (en) 2011-08-04 2015-06-02 J&L Group International, Llc Apparatus and method for stacking corrugated sheet material

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525311A (en) * 1946-02-18 1950-10-10 Miehle Printing Press & Mfg Method for controlling the height of a pile of delivered sheets
DE1081832B (de) * 1958-04-22 1960-05-12 Deutsche Bundespost Zwischenstapler mit selbsttaetiger Weitergabe von aus flaechenhaften Gegenstaenden bestehenden, in unregelmaessiger Folge ankommenden Sendungen
DE1108614B (de) * 1957-12-19 1961-06-08 Standard Elektrik Lorenz Ag Einrichtung zum Stapeln flacher Gegenstaende
US3047288A (en) * 1958-09-11 1962-07-31 Johns Manville Automatic article reversing mechanism
US3224761A (en) * 1962-06-29 1965-12-21 Jagenberg Werke Ag Method and apparatus for depositing sheets ejected by a cross cutter
DE1223681B (de) * 1965-02-01 1966-08-25 Durag Appbau G M B H Vorrichtung zum staendigen Aufeinanderstapeln von Bogen mit einer Absenkvorrichtung
US3395916A (en) * 1965-04-28 1968-08-06 Masson Scott Thrissell Eng Ltd Sheet feeding apparatus
US3430950A (en) * 1965-12-23 1969-03-04 Masson Scott Thrissell Eng Ltd Sheet feeding mechanism

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525311A (en) * 1946-02-18 1950-10-10 Miehle Printing Press & Mfg Method for controlling the height of a pile of delivered sheets
DE1108614B (de) * 1957-12-19 1961-06-08 Standard Elektrik Lorenz Ag Einrichtung zum Stapeln flacher Gegenstaende
DE1081832B (de) * 1958-04-22 1960-05-12 Deutsche Bundespost Zwischenstapler mit selbsttaetiger Weitergabe von aus flaechenhaften Gegenstaenden bestehenden, in unregelmaessiger Folge ankommenden Sendungen
US3047288A (en) * 1958-09-11 1962-07-31 Johns Manville Automatic article reversing mechanism
US3224761A (en) * 1962-06-29 1965-12-21 Jagenberg Werke Ag Method and apparatus for depositing sheets ejected by a cross cutter
DE1223681B (de) * 1965-02-01 1966-08-25 Durag Appbau G M B H Vorrichtung zum staendigen Aufeinanderstapeln von Bogen mit einer Absenkvorrichtung
US3395916A (en) * 1965-04-28 1968-08-06 Masson Scott Thrissell Eng Ltd Sheet feeding apparatus
US3430950A (en) * 1965-12-23 1969-03-04 Masson Scott Thrissell Eng Ltd Sheet feeding mechanism

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6467605B1 (en) 1971-04-16 2002-10-22 Texas Instruments Incorporated Process of manufacturing
US3885664A (en) * 1972-10-05 1975-05-27 Nippon Electric Co Transport-direction reversing apparatus for an automatic mail handling system and the like
US4213602A (en) * 1974-07-16 1980-07-22 De Staat Der Nederlanden, Te Dezen Vertegenwoordigd Door De Directeur-Generaal Der Posterijen, Telegrafie En Telefonie Switching device for letters and the like
US4051957A (en) * 1975-01-21 1977-10-04 Pitney-Bowes, Inc. Container loading system
US4245833A (en) * 1978-04-03 1981-01-20 Hugin Kassaregister Ab Device for feeding and stacking forms in a box
JPS54136074A (en) * 1978-04-03 1979-10-22 Hugin Kassaregister Ab Device that feed paper chit and is used for stacking chit in box
JPH0229575B2 (US08197722-20120612-C00042.png) * 1978-04-03 1990-06-29 Etsuserute Norudeia Ab
DE2913077A1 (de) * 1978-04-03 1979-10-11 Hugin Kassaregister Ab Vorrichtung zum zufuehren und stapeln von formularen in einem fach
US4310152A (en) * 1979-03-13 1982-01-12 Gao Gesellschaft Fur Automation Und Organisation Mbh Stacker for flat material
US4507109A (en) * 1981-02-02 1985-03-26 Wully, S.A. Apparatus for reception and transfer of sheet material
US4714394A (en) * 1984-04-13 1987-12-22 Winkler & Duennebier Maschinenfabrik Und Eisengieserei Gmbh & Co. Kg Method and appartus for depositing a proper number of flexible work pieces in a proper position
US4667953A (en) * 1985-08-28 1987-05-26 Mitsubishi Jukogyo Kabushiki Kaisha Sheet stacker
EP0612682B2 (de) † 1993-02-24 2000-01-12 E.C.H. Will GmbH (HRB 51 057) Vorrichtung zum Ansammeln von Papierbogen
US5397120A (en) * 1993-02-24 1995-03-14 E.C.H. Will Gmbh Apparatus for stacking sheets
DE4305579A1 (de) * 1993-02-24 1994-08-25 Will E C H Gmbh & Co Vorrichtung zum Ansammeln von Papierbogen
US6082733A (en) * 1997-06-12 2000-07-04 Bobst S.A. Sorting device in a conveyor of plate-like workpieces
US20130320614A1 (en) * 2010-04-13 2013-12-05 J&L Group International Llc Sheet deceleration apparatus and method
US8827265B2 (en) * 2010-04-13 2014-09-09 J&L Group International, Llc Sheet deceleration apparatus and method
US20120074638A1 (en) * 2010-09-28 2012-03-29 Nakagaki Toshihiro Sheet conveyance device and image forming apparatus
US8608165B2 (en) * 2010-09-28 2013-12-17 Ricoh Company, Ltd. Sheet conveyance device and image forming apparatus with conveyance guide for conveyance belt
US9045243B2 (en) 2011-08-04 2015-06-02 J&L Group International, Llc Apparatus and method for stacking corrugated sheet material

Also Published As

Publication number Publication date
CA1000311A (en) 1976-11-23
FR2042568A1 (US08197722-20120612-C00042.png) 1971-02-12
GB1303165A (US08197722-20120612-C00042.png) 1973-01-17
FR2042568B1 (US08197722-20120612-C00042.png) 1973-02-02

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