Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Surface finishing
Patent
1993-09-03
1995-07-25
Dawson, Robert A.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Surface finishing
264175, 264280, 264DIG48, 156153, 425366, B28B 1108
Patent
active
054359570
ABSTRACT:
The present invention provides a method of preparing a support for a filtration medium comprising passing a sheet of nonwoven fibrous polymeric material having first and second sides through a calender which comprises a nondeformable roll and a resilient roll, the nondeformable roll being maintained at a temperature below the melting temperature of the material, so as to increase the smoothness of the first side of the material which contacted the resilient roll. A filtration medium support material prepared in accordance with the method of the present invention, as well as a filter comprising a filtration medium and that filtration medium support material, are also provided by the present invention.
REFERENCES:
patent: 3591010 (1971-07-01), Pall et al.
patent: 3592767 (1971-07-01), Pall
patent: 3716436 (1973-02-01), Pall et al.
patent: 3867294 (1975-02-01), Pall et al.
patent: 4033881 (1977-07-01), Pall
patent: 4184966 (1980-01-01), Pall
patent: 4340479 (1982-07-01), Pall
patent: 4609465 (1986-09-01), Miller
patent: 4693985 (1987-09-01), Degen et al.
patent: 5006235 (1991-04-01), Cooper
"Beloit Wheeler" Brochure (Beloit Corporation Form. No. BMI 062 1113M Rev).
"Beloit Manhatten Supertex.RTM. Roll Covers" Brochure (Beloit Corporation Form No. BMD1027 VG 10/90 3M).
"Beloit Wheeler Model 700" Information Sheet (Beloit Corporation).
Degen Peter J.
Harwood Colin F.
Mei Jason
Ronan John B.
Dawson Robert A.
Pall Corporation
Walker W. L.
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