Pulp dryer screen assembly and method for tightening the screen thereof
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United States of America Patent
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May 10, 1994
Issued Date -
N/A
app pub date -
Jan 18, 1991
filing date -
Sep 29, 1989
priority date (Note) -
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status (Latency Note)
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Abstract
A pulp dryer screen assembly includes a rectangular screen, a rectangular frame having four interconnected, elongated frame members and four support members, each support member being adjacent a frame member and aligned therewith. The screen has a taut inner portion and surrounding edge portions clamped between the frame members and adjacent support members. The inner portion of the screen has a pulp fiber collecting surface which has an upstream side with respect to air flow and extends along a plane. The frame and support members are entirely on a downstream side of the plane opposite the upstream side. Preferably the frame members are square tubes, and the support members have orthogonal Z-sections for small screens, and at least two orthogonal W-sections for large screens. The screen is tightened within the frame by drawing opposite support members away from each other to clamp edge portions of the screen between the support members and the frame. The support members are then connected to the frame.
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