WO2005019076A2 - Dispositif d'empilement de feuilles pour machine a imprimer - Google Patents

Dispositif d'empilement de feuilles pour machine a imprimer Download PDF

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Publication number
WO2005019076A2
WO2005019076A2 PCT/US2004/027107 US2004027107W WO2005019076A2 WO 2005019076 A2 WO2005019076 A2 WO 2005019076A2 US 2004027107 W US2004027107 W US 2004027107W WO 2005019076 A2 WO2005019076 A2 WO 2005019076A2
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
sheet conveyance
conveyance devices
devices
deflection
Prior art date
Application number
PCT/US2004/027107
Other languages
English (en)
Other versions
WO2005019076A3 (fr
Inventor
Dirk Dobrindt
Original Assignee
Eastman Kodak Company
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 Eastman Kodak Company filed Critical Eastman Kodak Company
Priority to EP04781731A priority Critical patent/EP1660396A2/fr
Priority to US10/569,055 priority patent/US20070096390A1/en
Publication of WO2005019076A2 publication Critical patent/WO2005019076A2/fr
Publication of WO2005019076A3 publication Critical patent/WO2005019076A3/fr

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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/38—Delivering or advancing articles from machines; Advancing articles to or into piles by movable piling or advancing arms, frames, plates, or like members with which the articles are maintained in face contact
    • B65H29/40—Members rotated about an axis perpendicular to direction of article movement, e.g. star-wheels formed by S-shaped members
    • 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
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/65—Other elements in face contact with handled material rotating around an axis parallel to face of material and perpendicular to transport direction, e.g. star wheel

Definitions

  • the invention relates to a device for stacking sheets for a printing machine, preferably an electrophotographic printing machine, comprising at least a drivable sheet conveyance device which can be driven in rotation, and which is provided for receiving or grabbing a front edge of a sheet and for stacking the sheet after it has moved through a rotation path.
  • a stacking device for sheets which includes a sheet conveyance device, which can be driven in rotation, is known, for example, from U.S. Patent No. 4,252,309. In this known stacking device, the front edge is inserted into a slit of the substantially disk-shaped sheet conveyance device.
  • the sheet which has thus been grabbed, is moved along by an upper grabbing place by a half rotation of the sheet conveyance device and turned, and then it is stacked on the reached lower level on a stacking place where it is stacked on other sheets.
  • the sheet to be stacked is released automatically from the sheet because the conveyance device moves past a stop, which retains the sheet.
  • a sheet is preferentially transferred by transport rollers at the end of a transport path for printing materials to the sheet conveyance device.
  • a good stacking of the sheet is achieved, in particular, if the transport rollers at that time are just transferring the back edge of the sheet, as soon as the sheet front edge reaches a stop at an output place, because the sheet is then stacked flexibly onto the stack of sheets.
  • the sheet should have a length, which is such that it just surrounds approximately half of the sheet conveyance device, and thus corresponds approximately to half the circumference of the surface of the sheet conveyance device. However, this is far from being always the case. Longer or shorter formats are also transported.
  • the radius of the sheet conveyor device in view of the use of such a printing material, is chosen to be larger, as a preventive measure, than would perhaps be appropriate for the length of the sheet format.
  • the sheets should be transported in, as regular as possible a flow, and the gap between two successive sheets should not be too large. However, successive sheets also should not overlap. Thus, it can happen that the free slit, which is intended for the next reception, could be ready either too early or too late, depending on the situation.
  • An additional special embodiment of the invention provides for the use of a sheet deflection device which works in cooperation with the sheet conveyance devices, where the sheet deflection device forms, with a surface which serves as support for the sheet, a substantially curved path for the sheet to be conveyed, and each sheet conveyance devices presents at least one overlapping element for overlapping the received sheet front edge, in such a manner that the sheet front edge can be grabbed, in a manner so it can be moved along, between one of these overlapping elements of a sheet conveyance device and the surface of the sheet deflection device.
  • the invention is therefore based on the secondary problem of indicating a functional alternative. It is advantageous, in the mentioned solution according to the invention of these problems, to distribute functions over different elements, for the purpose of achieving a more targeted, and more reliable functionality.
  • the sheet deflection device substantially assumes the function of a disk body and it provides a device and a support for the sheet, where this sheet deflection device also does not necessarily have to be in the shape of a disk, rather, according to an embodiment, it can also be segmented in the shape of a wheel or in any other manner.
  • the sheet conveyance device takes over above all a part of the holding function, by readying an overlapping element, which clamps the sheet front edge between itself and the surface of the adjacent sheet overlapping element, and holds it reliably as a result, without damaging the front edge.
  • sheet conveyance devices however, even more must not be in the shape of a disk; rather it is preferred that, according to an embodiment of the invention, they are characterized by an arrangement, which substantially includes two armed pivoting beams, which each present, in the area of each one of their two radially outward free ends, an overlapping element.
  • each sheet conveyance device is already prepared to take up a next sheet, while it is depositing a preceding sheet, or at least shortly thereafter.
  • the sheet deflection device which is already preferably substantially symmetrical with respect to an axle of rotation, is in any case in principle ready in any rotational position and at all times.
  • the overlapping element is preferably a tongue or lash with a surface, and also optionally with spring mounted yield, so that an additional mechanism to prevent damaging the sheet front edge is provided.
  • the overlapping element is substantially a tongue or cover plate, which is approximately parallel to the curvature path of the sheet deflection element.
  • the next embodiment of the invention provides for the multitude of sheet conveyance devices and the sheet deflection device to be each doubled and arranged on the common axle with mirror symmetry with respect to each other, in such a manner that all sheet conveyance devices are arranged between the two sheet deflection devices, so that a front sheet edge, in its orientation parallel to the common axle of the sheet conveyance devices and the sheet deflection devices, can be jointly grabbed by two of the sheet conveyance devices, of which there is a total of at least four, and the two sheet deflection devices.
  • the sheet is advantageously reliably grabbed over its entire width and, in particular, a transverse position or rotation due to the transport is also prevented.
  • the side of the overlapping elements of the sheet conveyor devices which is turned toward the sheet, to be at a smaller radial distance from the common axle than the overlapped external side of the sheet which applies its thickness on the radius of the surfaces of the sheet deflection devices, so that the sheet front edge in its travel is forced and bent through, in a manner generating tension, in the area of the overlapping elements, approximately in the direction of the common axle.
  • the device according to the invention as well has a stop for the sheet front edges, with which the sheet conveyance devices work in cooperation during the stacking of the sheets.
  • this device is preferably characterized by at least one guiding element which blocks a grabbed sheet at least in the centrifugal direction, between a grabbing place and a delivery place of the sheet to force the sheet to maintain the radius of curvature.
  • the grabbed and transported sheet is still reliably stacked, in an immediate position, to the surface of the first sheet conveyance device, even if its back edge were released too soon from transport rollers.
  • a particular result of the use according to the invention of at least two sheet conveyance devices is that there time is saved during the stacking of the sheet, if one provides, if desired, at least one shifting device which is coupled with at least one of the sheet conveyance devices, for a transverse shifting of a sheet to be stacked, in a direction which is substantially parallel to the common axle of the sheet conveyance devices.
  • FIG. 1 shows sheet conveyance devices according to the invention in a side view in a first rotational position
  • FIGS. 2 through 4 show the sheet conveyance devices in additional rotational positions
  • FIG. 5 is a perspective view of a device according to the invention with sheet conveyance devices according to FIGS. 1 through 4.
  • DETAILED DESCRIPTION OF THE INVENTION FIGS. 1 through 4 show sheet conveyance devices according to the invention in a side view in different rotational positions to illustrate the functional course of such an example of a device according to the invention.
  • FIG. 1 shows sheet conveyance devices according to the invention in a side view in a first rotational position
  • FIGS. 2 through 4 show the sheet conveyance devices in additional rotational positions
  • FIG. 5 is a perspective view of a device according to the invention with sheet conveyance devices according to FIGS. 1 through 4.
  • DETAILED DESCRIPTION OF THE INVENTION FIGS. 1 through 4 show sheet conveyance devices according to the invention in a side view in different rotational positions to illustrate the functional course of
  • the pin roller 3 is used as a guiding element which blocks in the centrifugal direction, and which is preferably adjustable along the circumference of the sheet deflection device 1, in order to be able to guide different sheet formats reliably and for a sufficiently long time.
  • the device according to the invention includes, in the representation of FIGS.
  • a sheet to be transported can be inserted with its sheet front edge into the slit between the sheet deflection device 1 and an overlapping element 6, and held therein, and it can be conveyed by the simultaneous rotation of the sheet deflection device 1 and of the sheet conveyance device 4 or 5, each affected by its corresponding overlapping element 6, to a stop 7, and stacked there on a stack of sheets, 8.
  • the two sheet conveyance devices 4, 5 can in principle be rotated independently of each other about the common rotation axle 9, so that they can assume the corresponding different rotational positions in order to take over, in as rapid as possible a sequence, one sheet after the other from the transport rollers 2, and to be able to deposit them on the stack of sheets, 8.
  • Each respective position of the determining overlapping elements 6 is better identified in FIGS. 1 through 4 because the positions are labeled A, B, C, and D to allow them to be distinguished.
  • FIGS. 1 through 4 the course of the operation of the device according to the invention can thus be described as follows:
  • the first sheet conveyance device 4 is positioned in such a manner that the overlapping element A is in the sheet receiving position.
  • the second sheet conveyance organ 5 follows the sheet conveyance device 4 with its overlapping element D at a short interval. This is a result of the fact that the overlapping element C is placed in such a manner on the opposite side (area stop 7) of the second sheet conveyance device 7, that precisely one sheet can be stacked on the stop 7.
  • the second sheet conveyance device 7 can now remain in the described position until the first sheet conveyance device 4 with the next sheet to be stacked runs downward and must enter into the area of the stop 7.
  • This intermediate stop of the overlapping elements 6 in the area of the stop 7, which tends to deposit a sheet on the stop 7, is advantageous if, as preferably provided for, before the stop 7 an offset shift of the sheets is to be carried out, that is if at least one shifting device, which is not shown in further detail, and which is coupled with at least one of the sheet conveyance devices 1, 4, 5, is provided, for the transverse shift of a sheet to be stacked in a direction which is substantially parallel to the common axle 9 of the sheet conveyance devices. If the overlapping element A with the next sheet to be stacked has moved downward and assumed practically the position of the overlapping element C, then the overlapping element D has already moved into the sheet receiving position.
  • Sheet conveyance device 4 with overlapping element A is in the sheet receiving position; sheet conveyance device 5 follows with a short separation after the sheet conveyance device 4 with the overlapping element D; - simultaneously, the sheet conveyance device 5 with the segment C could deposit a sheet on the stack edge, or cause an offset movement to be performed there.
  • Third step (FIG.
  • FIG. 5 is a perspective view of an embodiment example of a device according to the invention.
  • the same construction elements are identified with the same reference numerals as in FIGS. 1 through 4.
  • FIG. 5 one can see, in particular, that two sheet deflection devices 1 and four sheet conveyance devices 4, 5 are arranged on the axle 9 in a mirror symmetric arrangement with respect to each other, in such a manner that the two sheet deflection devices 1 are located on the outside and the sheet conveyance devices 4, 5 are located in between.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pile Receivers (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Discharge By Other Means (AREA)

Abstract

La présente invention a trait à un dispositif d'empilement de feuilles pour une machine à imprimer, comportant au moins un dispositif de déviation de feuilles apte à être entraîné en rotation, et prévu pour la réception ou la préhension d'un bord avant d'une feuille et pour l'empilement de la feuille suite à son déplacement selon un trajet de rotation, et présentant au moins deux dispositifs de transport de feuilles apte à être entraînés en rotation de manière sensiblement indépendante l'un de l'autre autour d'un axe commun, et ainsi l'un de ces deux dispositifs de transport de feuilles est prêt pour la réception ou la préhension de la feuille suivante, tandis qu'un autre des ces dispositifs de transport de feuilles est procède encore au transport et à l'empilement de la feuille précédente.
PCT/US2004/027107 2003-08-22 2004-08-20 Dispositif d'empilement de feuilles pour machine a imprimer WO2005019076A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04781731A EP1660396A2 (fr) 2003-08-22 2004-08-20 Dispositif d'empilement de feuilles pour machine a imprimer
US10/569,055 US20070096390A1 (en) 2003-08-22 2004-08-20 Device for stacking sheets for printing machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10338597 2003-08-22
DE10338597.5 2003-08-22

Publications (2)

Publication Number Publication Date
WO2005019076A2 true WO2005019076A2 (fr) 2005-03-03
WO2005019076A3 WO2005019076A3 (fr) 2005-06-02

Family

ID=34201840

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/027107 WO2005019076A2 (fr) 2003-08-22 2004-08-20 Dispositif d'empilement de feuilles pour machine a imprimer

Country Status (4)

Country Link
US (1) US20070096390A1 (fr)
EP (1) EP1660396A2 (fr)
JP (1) JP4076526B2 (fr)
WO (1) WO2005019076A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007017182A1 (fr) 2005-08-11 2007-02-15 Eastman Kodak Company Dispositif de depot de feuilles d'une machine a imprimer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090038056A1 (en) * 2007-07-20 2009-02-12 Joseph Bobbin Electronic module adapter for headgear

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4252309A (en) * 1979-06-29 1981-02-24 International Business Machines Corporation Document sheet flipper
EP0644142A1 (fr) * 1992-06-03 1995-03-22 Kabushiki Kaisha Ace Denken Dispositif de stockage de feuilles de papier
US20020063378A1 (en) * 2000-11-28 2002-05-30 Nexpress Solution Llc Sheet delivery device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL248213A (fr) * 1960-02-09 1900-01-01
DE3404459A1 (de) * 1984-02-08 1985-08-14 Frankenthal Ag Albert Verfahren und vorrichtung zur auslage bogenfoermiger produkte in form eines schuppenstromes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4252309A (en) * 1979-06-29 1981-02-24 International Business Machines Corporation Document sheet flipper
EP0644142A1 (fr) * 1992-06-03 1995-03-22 Kabushiki Kaisha Ace Denken Dispositif de stockage de feuilles de papier
US20020063378A1 (en) * 2000-11-28 2002-05-30 Nexpress Solution Llc Sheet delivery device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007017182A1 (fr) 2005-08-11 2007-02-15 Eastman Kodak Company Dispositif de depot de feuilles d'une machine a imprimer

Also Published As

Publication number Publication date
US20070096390A1 (en) 2007-05-03
JP2005067895A (ja) 2005-03-17
WO2005019076A3 (fr) 2005-06-02
JP4076526B2 (ja) 2008-04-16
EP1660396A2 (fr) 2006-05-31

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