Laminated filters

Details Laminated filters Laminated filters

1989-03-03

1990-10-09

Cannon, James C.

Stock material or miscellaneous articles

Hollow or container type article

Paper containing

55521, 55524, 55528, 55DIG5, 55DIG28, 55DIG44, 428 361, 428 3691, 428 93, 428 95, 428 96, 428 97, 428181, 428286, 428287, 428288, 4283115, 4283117, 4283166, 4283177, 4283179, 428332, 428340, B01D 3916, B01D 3918, B32B 524, B32B 526

Patent

active

049619748

ABSTRACT:
Laminated composite structures for use in making fluid filters are disclosed. Such structures comprise (a) a densified high loft layer of powder bonded nonwoven fabric, rebulkable by heating, laminated to (b) a filter media or element that supplies stiffness to the laminate. Also disclosed are methods of making fluid filters, e.g., ones used to filter inlet air for internal combustion engines, from such laminates, and fluid filters containing such laminates in which the nonwoven layer has been rebulked by heating.

REFERENCES:
patent: 4540625 (1985-09-01), Sherwood
patent: 4636231 (1987-01-01), Thornton et al.
patent: 4666479 (1987-05-01), Shoji
patent: 4701197 (1987-10-01), Thornton et al.
patent: 4728349 (1988-03-01), Oshitari
patent: 4765812 (1988-08-01), Homonoff et al.
patent: 4765915 (1988-10-01), Diehl
Meyer et al., "Production of Laminates and Nonwovens by Powder Bonding", Jan. 30, 1986, Insight '85 Advanced Forming/Bonding Conference, Oct. 27-29, 1985, Toronto, Canada.

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