Typewriting machines – Sheet or web – For feeding web record-medium
Patent
1999-04-21
2000-10-10
Eickholt, Eugene
Typewriting machines
Sheet or web
For feeding web record-medium
101483, 101226, 83 80, B41J 1126
Patent
active
061294683
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method for transporting sheets and to a sheet processing machine in which sheets are separated into partial sheets. The partial sheets are then separated from each other laterally with respect to a sheet transport direction.
DESCRIPTION OF THE PRIOR ART
DE-PS 15 11 067 describes a device for cutting sheets from a web. Here, the web is cut into partial webs, and these partial webs are deflected into different levels prior to being transversely cut. No spacing in the axial direction is provided by this prior art device.
DE 31 15 688 C2 discloses a device for separating usable and waste material to be obtained from a web of material. The usable material is cut out of the web by the operation a cutting cylinder. The direction of the cut is essentially transversely in relation to the transport direction.
DE-AS 10 88 798 describes a device for separating a web into partial webs. The partial webs are spaced apart by means of guide surfaces and are cut into sheets by means of a transverse cutting device. These sheets fall onto a stack on a feed table.
DE-PS 1 175 695 discloses a processing cylinder with two gripper systems. These two gripper systems are hingedly connected with each other and are displaceable, or respectively pivotable, together.
These two gripper systems cannot be moved in relation to each other in the axial direction.
DE 24 17 614 B2 describes a device for feeding products in connection with a web-fed rotary printing press. In this case, products, which are deposited by paddle wheels and are respectively located next to each other are conveyed by means of a product carrier.
In the course of the conveyance of the products on the product carrier, a gripper acts on respective lateral edges of the products located next to each other and moves the products transversely away from each other for creating a space.
The object of the invention is based on creating a method for transporting sheets, and a sheet processing machine.
In accordance with the invention, this object is attained by means of the features of the characterizing portions of claims 1, 4, and 5.
The advantages which can be achieved by means of the invention lie in particular in that transverse cutting from the respectively located next to each other, are conveyed by means of a product carrier.
In the course of the conveyance of the products on the product carrier, a gripper acts on respective lateral edges of the products located next to each other and moves the products transversely away from each other thereby creating a space.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a method for transporting sheets, and a sheet processing machine.
In accordance with the present invention, this object is attained by separating each of a plurality of sheets into partial sheets by using at least one longitudinal cut. The partial sheets are moved apart from each other in the processing machine in a direction transverse to the direction of sheet travel. At least one chain gripper system carries at least two holding systems which are separable laterally and which can each deposit a partial sheet on a selected one of a plurality of sheet stacks. The partial sheets can have been inspected after having been cut.
The advantages which can be achieved by means of the present invention lie, in particular, in that transverse cutting from the start to the end of a sheet takes place without manual intervention in a sheet processing machine. It is possible, by means of integrated inspection devices, to control the print quality itself, as well as to control the cut registrations in the sheet processing machine. In this way, it is possible to simultaneously control the fronts and backs of the sheet, which were printed, for example, on the obverse and reverse sides of the sheet.
A simple cut registration adjustment is possible because of the cooperative operation of the transverse cutting devices with a chain conveyor. This is advantageously performed by means of a positio
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Eickholt Eugene
Koenig & Bauer Aktiengesellschaft
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