Tension control device for a printing press
AssigneeGoss Graphic Systems, Inc.
InventorsKenneth R. Brennan, Theodore Costopolous, Frederick J. Whiting, Thaddeus A. Niemiro, Xin Xin Wang
Life of this patent
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Abstract
A tension control device for a printing press having an adjustment roller, with a web of the press passing from a supply roll of the web to the adjustment roller. Means are provided for measuring the tension on opposed sides of the web passing downstream from the adjustment roller, and means are provided responsive to the measuring means for automatically approximately equalizing the tension of the web by adjustment of the adjustment roller on one end only of the adjustment roller.
Claims20
A tension control device for a printing press, comprising:
- an adjustment roller, with a web of the press passing from a supply roll of the web to the adjustment roller;
- means for measuring the tension on opposed sides of the web passing downstream from the adjustment roller;
- and
- means responsive to the measuring means for automatically approximately equalizing the tension of the web by adjustment of the adjustment roller on one end only of the adjustment roller.
A tension control device for a printing press, comprising:
- an adjustment roller;
- a tension roller positioned downstream of the adjustment roller, with a web of the press passing from a supply roll to the adjustment roller and tension roller, wherein the web is positioned off-center with respect to the adjustment roller and tension roller;
- means for measuring the tension on opposed ends of the tension roller, wherein a tension differential is detected at the opposed ends of the tension roller when tension at opposed sides of the web are substantially equal;
- and
- means responsive to the measuring means for automatically approximately equalizing the tension at opposed sides of the web by adjusting the adjustment roller on one end only of the adjustment roller to maintain the tension differential.
A tension control device for a printing press having a web, comprising:
- an adjustment roller and a tension roller located downstream of the adjustment roller, wherein the web passes over the adjustment roller and tension roller;
- a pair of transducers for measuring tension at opposed ends of the tension roller;
- means for adjusting one end only of the adjustment roller;
- and
- a controller for controlling the adjusting means in response to the transducers to approximately equalize tension on opposed sides of the web.
Dependencies are inferred from the claim text.