Eastman-kodak Company

Nexpress Solutions, Inc.

Dirk Dobrindt

Lutz Rebetge

Rolf Dieter Gritzuhn

Domingo Rohde

Detlef Schulze-Hagenest

Frank-Michael Morgenweck

Knut Behnke

Gerhard Bartscher

Hans-Otto Krause

Gerald Erik Hauptmann

Kai-Uwe Preissig

Ingo Neuber

Dieter Gritzuhn

Uwe Goldbeck

Bernhard A Linke

Uwe Fischer

Jens U Heise

Peter-Alexander Püschner

Jens Heise

Bernhard Linke

Presented herein is a sheet turning unit () comprising a first sheet conveyor device () for transporting a sheet at least along a first transport path (B) in a first plane (E), and comprising a second sheet conveyor device () for transporting the sheet along a second transport path (B), said second transport path extending at an angle of 90&#xb0; with respect to the first transport path (B) and, in sum, describing a curve of 180&#xb0;, whereby the starting point of said curve is located in the first plane (E) and the end point of said curve is located in a second plane (E) that is different from the first plane, and comprising a third sheet conveyor device () for transporting the sheet along at least a third transport path (B). As a result of this, the leading edge of the sheet remains in front even after the turning operation, and a precisely functioning and reliable sheet turning unit is being provided. Furthermore, advantageous embodiments of the first and third sheet conveyor devices are described, said devices enabling the transport of a sheet in two directions. The advantageous embodiments of the first and third sheet conveyor devices are compact and simple in design and can be controlled easily. The advantageous embodiments of the first and third sheet conveyor devices comprise a sheet transport body that, by means of a rotating mechanism arranged in the sheet transport body, can be rotated about a first rotational axis and a second rotational axis, said axes extending through one point of intersection and being perpendicular to one another.

Sheet-transport device, sheet-turning unit and method for turning sheets

The invention relates to a device for depositing sheets for a printing machine, preferably for an electrophotographically operating printing machine, said device comprising at least one sheet transport member which can be driven so as to rotate and which is provided for the detection of a lead edge of a sheet and for depositing the sheet after it has covered a rotating path.

Device for depositing for a printing machine with a blower system

The present invention relates to a device for depositing sheets for a printing machine, said device comprising at least one rotating drivable sheet transport element, which is designed to receive or grasp a leading edge of a sheet and deposit said sheet on a stack after said sheet has traveled a path of rotation, and comprising at least one drag element for pulling a sheet that has been deposited on the stack toward a mechanical stop. With the present invention, the drag element is coupled with the rotation of the sheet transport element and is arranged in such a manner that said drag element can assume an inoperative position within the region covered by the rotating sheet transport element, and that said drag element, in order to perform its dragging function, can be moved at least partially out of the region covered by the rotating sheet transport element.

Device for depositing sheets in a stack

At least two coaxially rotatable sheet conveyors, operating together with one another, are provided, of which the first sheet conveyor, with a jacket surface serving as placement for the sheet, specifies essentially a curvature path for the sheet to be conveyed, and the second sheet conveyor has at least one gripping element to grip the accepted front edge of the sheet, in such a way that the front edge of the sheet can be gripped and conveyed between the gripping element and the jacket sheet.

Device for placing sheets for a printer

The present invention relates to a device for depositing sheets for a printing machine, said device comprising at least one rotating drivable sheet transport element (), which is designed to receive or grasp a leading edge of a sheet and deposit said sheet on a stack after said sheet has traveled a path of rotation, and comprising at least one drag element () for pulling a sheet that has been deposited on the stack toward a mechanical stop. With the present invention, the drag element is coupled with the rotation of the sheet transport element and is arranged in such a manner that said drag element can assume an inoperative position within the region covered by the rotating sheet transport element, and that said drag element, in order to perform its dragging function, can be moved at least partially out of the region covered by the rotating sheet transport element.

Depositing a sheet of paper onto a stack of sheets of paper, preferably for use in a printing press, where the sheet to be deposited is grasped by at least one rotationally drivable sheet conveyor member with the front edge of the sheet fed into a receptacle, and the sheet's front edge is released from the receptacle of the rotating sheet conveyor member prior to depositing of the sheet onto the stack of sheets, and instead, it is deposited into a receptacle of an intermediate transport member where it is further released for depositing the sheet onto the stack of sheets.

Method and apparatus for depositing sheet of paper onto a stack using intermediate transport member

At least two sheet conveyors are provided in such a way that several of these conveyors can rotate around the common axis, essentially independent of one another, and thus one of these sheet conveyors is ready to accept or detect the next sheet, if another of these sheet conveyors is still occupied with the transport or the placement of a preceding sheet and that a sensor is coupled mechanically with several of these sheet conveyors.

The invention relates to a sheet delivery device for a printing machine, preferably for an electrophotographically operating printing machine, comprising a transfer path on which sheets are transported from a path entry () of said transfer path to a path exit () of said transfer path via said transfer path. The object of the invention is to be able to adapt a sheet delivery device of the above-said type to various types of printing machines in a cost-effective and simple manner, preferably with minimal manipulation. In accordance with the present invention, this object is achieved in that a specific height level is assigned to the path exit (), while the path entry () is configured in a height-variable manner.

Sheet delivery device for a printing machine

An apparatus for the alignment of a stack of sheets including at least one pair of trimming elements which can be adjusted at distances relative to each other in a substantially continuous manner in order to accommodate and align the stack between said trimming elements. The trimming elements are coupled to allow their counter-directional movement with respect to each other, such that an automatic stop means preventing an enlargement of the distance between the trimming elements can be deactivated if required.

Apparatus for the alignment of a stack of sheets

Transporting an essentially sheet-like element, particularly for transporting a sheet of printing material in a printing press, in which the sheet-like element is picked up in the area of its leading edge by at least one rotating transport at a pickup site, transported to a delivery site, and then delivered there, wherein the sheet-like element is curved over a rotational or curvature radius during transport. The sheet-like element is forced between the pickup site and the delivery site by at least one guide element, that is, an intermediate guide element, that blocks at least in the centrifugal direction, in order to maintain the radius of curvature.

Transporting an essentially sheet-like element, particularly in a printing press

A digital printing or copying machine () is proposed for the one-sided or double-sided printing onto a substrate (), using at least one toner. The machine () includes at least one fixation device () for fixing the toner image on the substrate (). The fixation device () has at least one heating device () for melting the toner image, past which the substrate () can be taken. The machine () is distinguished by a guide device () for the free floating movement of the substrate () in the effective range of the heating device ().

Digital printing or copying machine

Transporting an essentially sheet-shaped element, particularly for transporting a print material sheet in a printing press in which the sheet-shaped element is taken hold of by at least one rotating transport having at least one mouth-like receptacle for introducing the front-edge region of the sheet-shaped element at a grasping location in its front-edge region, entrained up to a delivery location and delivered there, the sheet-shaped element being bent during the entraining over a rotation or curvature radius. The sheet-shaped element is taken hold of by at least one grasping device in the region of the mouth-like receptacle, particularly actively and in a compulsory manner.

Transporting an essentially sheet-shaped element, particularly a print material sheet

Apparatus for depositing sheets on a stack, which permits essentially free access to the stack and can be implemented with a low outlay of materials and costs. The apparatus includes on the side of the stack () that faces a machine, tongues () with which frictional elements () can be brought into and out of contact and which can be moved in the conveying direction () of the sheets () and in the opposite direction, and can be lowered onto the stack (), and wherein on the side of the stack () that faces the machine, at least one hold-down () is provided which can be moved in the conveying direction () of the sheets () and in the opposite direction, and can be lowered onto the stack ().

Device for depositing sheets on a stack

A hold down clamp for holding down a stack of sheet material, preferably on a transportation trolley selectively in operative association with a printing machine. The hold down clamp has a vertically adjustable holding arm selectively lockable along a substantially upright guide member. The holding arm has at least one release member for releasing locking, the release member being movable in the direction away from the stack. This allows the holding arm to be pliable upwardly in case of emergency.

Hold down clamp for holding down sheet material

A device for conveying and depositing paper on at least one stack, with a device () for moving conveyor rollers () laterally in the conveying direction of the sheets and a device () for transmitting rotations to conveyor rollers (), in particular to operate within a depositing device of a sheet-processing machine. In order to ensure a quicker lateral movement of conveyor rollers () and to protect the devices () and () from soiling and mechanical effects, members of the same are located within a rod (), on which conveyor rollers () are located. Furthermore, there are possibilities to calibrate the device with respect to the position of conveyor rollers () and to adjust height differences within a stack with tensionless equalization.

Growing community of inventors

Klausdorf/Schwentine, Germany

Dirk Dobrindt