Winding – tensioning – or guiding – Convolute winding of material – With cutting – perforating – or notching
Patent
1993-04-15
1995-01-10
Stodola, Daniel P.
Winding, tensioning, or guiding
Convolute winding of material
With cutting, perforating, or notching
2425411, B65H 1816, B65H 2326
Patent
active
053799615
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase application corresponding to PCT/EP92/02155 filed Sep. 18, 1992 and based, in turn, upon an application filed in Germany as P 41 34 648.3 filed Oct. 19, 1991 under the International Convention. This application is also related to our commonly owned application Ser. No. 07/778,873 filed Dec. 23, 1991 with which it is copending.
FIELD OF THE INVENTION
The invention relates to a winding machine for winding webs of material, particularly paper or cardboard webs onto winder cores, wherein the web of material is taken up from a supply roll, longitudinally sectioned into separate webs of material and then wound at individual winding stations, each consisting of two winder brackets transversely movable with respect to the web.
BACKGROUND OF THE INVENTION
In order to individually adjust the tensile stress of each winding roll during the winding operation, according to the German Patent Application P 40 12 979.9 (see corresponding copending application Ser. No. 07/778,873) the guide heads holding the winding roll, which are fastened to the winder brackets are each connected with a rotary drive. In order to set the tensile stress during winding at values which are different from the ones set for the longitudinal cutting operation, the tensile stress of the individual webs is interrupted after the longitudinal cutting and before the onset of the winding operation by guiding the web in frictional engagement over a driven cylinder. In order to produce this frictional engagement at the driven cylinder, a free-running roller which can be pressed against the driven cylinder nips the individual web, so as to insure that the contact pressure roller has enough stability even with a small diameter, it is made of separate segments, each supported to run freely and preferably with a length of 100 mm-500 mm, and which are rubber coated to avoid marks.
In wide winding machines (web width 8 m and more) it has proven to be difficult to insure that the contact pressure of the roller at the driven cylinder is uniform over the entire work width.
OBJECT OF THE INVENTION
It is an object of the invention to provide a winding machine having over the entire work width an even contact pressure of the freely rotatable rolls applied at the driven cylinder.
SUMMARY OF THE INVENTION
A winding machine for winding webs of material, particularly paper or cardboard webs, which are taken up on winding cores from a supply roll against a braking force, can have a longitudinal cutting device for separating the web of material into individual webs, and a winding station for each individual web consisting of two winder brackets movable with respect to the web, whereby on each winder bracket a guide head connected with a rotary drive is mounted, and with a driven cylinder (support cylinder) arranged for web traction interruption between the longitudinal cutting device and the winding stations and a free running roller which can be pressed against the cylinder for frictional engagement, whereby this contact pressure roller consists of individual segments. Each of the segments is supported so that it can run freely. The segments are supported next to each other on an elastically bendable axle or shaft by radial bearings. The axle or shaft is fastened parallel to the axis of the driven cylinder (support cylinder) to a bending-resistant crossrail extending across the work width. Between any two segments a setting element (piston-cylinder-unit) fastened to the bending-resistant crossrail, engage the axle and presses in the direction towards the driven cylinder (support cylinder).
The winding machine of the invention offers the possibility of variable settings of the contact pressure over the work width, in order to influence the tensile stress at each winding station, depending on the buildup of the winding roll.
The segments can consist of a basic body which is a hollow cylinder of light metal, preferably aluminum, and has a smooth, rubber coated outer shell. The segments
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Hehner Reinhard
Urban Ernst-Gunther
Darling John P.
Dubno Herbert
Jagenberg Aktiengesellschaft
Kateshov Yuri
Stodola Daniel P.
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