Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Plural sequential shaping or molding steps on same workpiece
Patent
1997-11-17
1999-03-30
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Plural sequential shaping or molding steps on same workpiece
264322, 264324, B29C 5108
Patent
active
058884424
ABSTRACT:
A filter element made of nonwoven filter fabric includes a plurality of pleated portions and a flange portion formed integrally with the filter portion. The flange portion is formed by a pair of press-forming dies to have a thin and compressed connecting portion formed along the outer periphery of the filter portion, a thick and uncompressed seal portion formed along the outer periphery of the connecting portion and a thin and compressed protecting portion formed along the outer periphery of the seal portion.
REFERENCES:
patent: 5178760 (1993-01-01), Solberg, Jr.
patent: 5368925 (1994-11-01), Hosokawa et al.
patent: 5674302 (1997-10-01), Nakayama et al.
Honda Minoru
Inukai Satoshi
Kamo Hideo
Kometani Kazuo
Nakayama Toshiaki
Denso Corporation
Poe Michael
Silbaugh Jan H.
Toyoda Boshuku
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