Folding jaws cylinder

Details Folding jaws cylinder Folding jaws cylinder

1999-08-13

2001-09-04

Kim, Eugene (Department: 3721)

Manufacturing container or tube from paper; or other manufacturi

Bending

Folding

C493S442000, C493S476000

Reexamination Certificate

active

06283906

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a folding jaw cylinder for a folding apparatus of rotary printing presses.
A gap between the folding jaw elements can be set in accordance with the thickness of the product to be processed and can be automatically adjusted.
DESCRIPTION OF THE PRIOR ART
A folding jaw cylinder with a device for adjusting the folding gap in accordance with the thickness of the product to be folded is known from DE 25 37 920 A1. This adjustment is performed in that initially a sliding element with inclined faces is moved by means of a threaded spindle, which is supported on a threaded bushing and which extends in the axial direction of the cylinder. Thereafter, hingedly seated plungers extending in the radial direction of the cylinder are actuated by means of the inclined faces.
However, in connection with this prior art folding jaw cylinder it is disadvantageous that during the start-up of, for example, a collection production with triple collection, it loses the products as often, i.e. two or three times, as the preset folding jaws receive a product of a final product thickness.
Document EP-A 0 352 625 describes a folding jaw cylinder with at least one folding jaw having two folding jaw elements, wherein a gap between these foldingjaw elements can be adjusted to the thickness of products to be processed. This folding jaw cylinder additionally has a device, consisting of a measuring device and servo motors, for the adjustment ofthe gap between the folding jaw elements.
SUMMARY OF THE INVENTION
It is the object of the present invention to produce a folding jaw cylinder.
In accordance with the invention, this object is attained by the provision of a folding jaw cylinder with two folding jaw elements that are spaced apart at a gap distance. This gap distance can be set to a thickness of the products to be processed. A device for accomplishing the automatic adjustment of the gap distance or thickness between the folding jaw elements is provided.
The advantages which can be achieved in particular by means of the present invention reside in that in its basic position the folding jaw opening is adapted automatically to the product thickness. This means that the thickness of a folding product taken over by the folding jaws at the start-up of multiple collection production is “sensed”.
In this way, regardless of its thickness, each folding product is individually grasped, for example during the start-up of a production of multiply-collected folding products, in such a way that its sliding out of the folding jaw openings is prevented.


REFERENCES:
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patent: 5201701 (1993-04-01), Roettger et al.
patent: 5215014 (1993-06-01), Burger et al.
patent: 5417642 (1995-05-01), Boronka et al.
patent: 5429578 (1995-07-01), Calbrix et al.
patent: 5653429 (1997-08-01), Michalik et al.
patent: 5846177 (1998-12-01), Mayr
patent: 5924970 (1999-07-01), Wingate
patent: 2537920 A1 (1977-03-01), None

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