Gas separation – Flexible or collapsible bag type – Seaming – reinforcing or bag structure
Patent
1992-04-23
1993-09-21
Spitzer, Robert
Gas separation
Flexible or collapsible bag type
Seaming, reinforcing or bag structure
55382, 55484, 55521, 55528, 55DIG5, 264324, 264342R, B01D 2917, B01D 4624
Patent
active
052464741
ABSTRACT:
A rigid self-supporting filter unit is produced by placing two portions of fiber fabric in face-to-face contact and stitching them along parallel regions, using two rows of stitches (16), to form pockets into which formers (20) are inserted to shape the pockets into a generally diamond shape. This assembly is then placed between two presser members (22, 24) which are corrugated, the "valleys" of the corrugations receiving the diamond-shaped formed portions. The presser members are heated and the portions are thus treated by heat and pressure to cause the fabric to be rendered rigid. The formers can then be removed. Suitable fibers for this purpose include a rigidising fiber known as P84, polyphenylene sulphide fibers, polyester fibers either alone or mixed with polypropylene fibers, and bicomponent fibers.
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Brine Aubrey C.
British United Shoe Machinery Limited
Meegan Owen J.
Spitzer Robert
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