Method for manufacturing an air filter

Details Method for manufacturing an air filter Method for manufacturing an air filter

1991-11-20

1994-05-03

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264252, 2643287, 264DIG48, B29C 6722

Patent

active

053085590

ABSTRACT:
A method for manufacturing an air filter consists of building in two stages around a paper filtering element previously prepared, an edge made of flexible foam, first injecting resin into a separate space from the filtering element, and then letting it expand until it anchors to it.
An apparatus to carry out such method consists of a die in which the filtering element is inserted, around which a channel is formed where a mobile frame is sinked, whose shape corresponds to the filtering element one, in such a way as to define an injection recess separated from the filtering element, and an expansion recess adjacent to the filtering element, connected by the mobile frame lift, so that the resin can expand and anchor to the filtering element.

REFERENCES:
patent: 3183285 (1965-05-01), Boylan
patent: 3865919 (1975-02-01), Pall et al.
patent: 4438057 (1984-03-01), Sundseth
patent: 4569813 (1986-02-01), Taki et al.
patent: 4882055 (1989-11-01), Stamstad
patent: 4957672 (1990-09-01), Carter et al.
patent: 5030263 (1991-07-01), Kemp
patent: 5062874 (1991-11-01), Legare et al.

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