Manufacturing container or tube from paper; or other manufacturi – With cutting – breaking – tearing – or abrading – And with bending
Reexamination Certificate
1999-09-22
2001-01-30
Gerrity, Stephen F. (Department: 3721)
Manufacturing container or tube from paper; or other manufacturi
With cutting, breaking, tearing, or abrading
And with bending
C493S359000, C493S360000, C493S370000, C493S402000, C493S405000, C493S442000, C493S444000
Reexamination Certificate
active
06179764
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method for processing moving paper webs, as well as to the associated device.
DESCRIPTION OF THE PRIOR ART
It is known from DE-PS 226 943 to transversely cut a paper web strand into signatures by means of a pair of cylinders and to subsequently cross-groove it.
It is a limitation of this prior art device that it is not possible to produce an overfold or a bottom fold in the course of this. Moreover, cross-grooving of signatures is only possible up to a defined thickness.
SUMMARY OF THE INVENTION
The object of the present invention is based on providing a method, as well as an associated device, for preparing a sharp-edged fold, in particular for thick signatures.
This object is attained in accordance with the invention by the provision of a pressing device which includes a rotating first support for a pressing tool, and a rotating second support for a counter-pressing tool. This pressing device is located upstream, in the direction of travel of a moving paper web, of a web cutting and transverse folding device. This pressing or creasing device creates transverse fold lines in the web before the web is cut.
The advantages which can be achieved by means of the invention rest, in particular, in that it is possible, by means of a vibration-supported pre-processing of paper webs, to transversely fold even thick signatures with good quality. It is furthermore advantageous, if individual or divided paper web strands are respectively separately pre-processed, and thereafter are conducted to a collection cylinder. Sharp-edged folds of high quality can also be produced during transverse folding of thick signatures by means of the method and the device of the present invention.
REFERENCES:
patent: 3908808 (1975-09-01), Busker
patent: 4102026 (1978-07-01), DeMasi
patent: 4680843 (1987-07-01), Junk et al.
patent: 4917665 (1990-04-01), Couturier
patent: 5259604 (1993-11-01), Schneider et al.
patent: 5553806 (1996-09-01), Lucas
patent: 5702341 (1997-12-01), Keilhau
patent: 5752437 (1998-05-01), Wilkens et al.
patent: 6038974 (2000-03-01), Richards
patent: 226943 (1909-06-01), None
Gerrity Stephen F.
Jones Tullar & Cooper PC
Koenig & Bauer Aktiengesellschaft
Tawfik Sam
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