Roller for conveying a web or sheet of paper in paper converting machines and conveying method thus obtained
Number of patents in Portfolio can not be more than 2000
United States of America
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Jan 25, 2022
Grant Date -
Mar 15, 2012
app pub date -
Sep 1, 2011
filing date -
Sep 1, 2011
priority date (Note) -
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Abstract
An improved conveying roller for a web or a sheet in a paper converting machine comprises a first cylindrical tubular body having a plurality of radial holes arranged in substantially longitudinal rows, and a second fixed tubular body arranged coxially within the first cylindrical tubular body. The first cylindrical tubular body is capable of rotation relative to the second fixed tubular body. Slidable sealing elements are positioned between the first cylindrical body and the second fixed tubular body to define at least one suction or vacuum chamber. The chamber is suitable for being brought selectively in communication with at least one row of the radial holes during the relative rotation of the bodies.
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