Method and device for reducing the volume or pressure of a fluid which is driven through an opening by moving surfaces
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United States of America Patent
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May 6, 2003
Grant Date -
N/A
app pub date -
May 16, 2001
filing date -
Sep 2, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method and device for reducing the volume or pressure of a fluid which is driven through an opening (3, 17) by moving surfaces. According to said method, the opening (3, 17) is divided in at least two flow channels (5, 6, 14) by means of one or more flexible separation members (4). Each separation member (4) is attached at its rear end relatively to the direction of displacement of said surfaces, and its front finishing end extends inside said opening (3, 17). The inventive method can be advantageously implemented during production and further transformation of strip-shaped materials (paper, cardboard strips, plastic material sheets) for bringing the strip which moves on an element (cylinder, roll, rigid guiding element, winding reel) into close contact with said element.
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