Method of producing a microcell polymer filter for use in flow r

Details Method of producing a microcell polymer filter for use in flow r Method of producing a microcell polymer filter for use in flow r

1992-03-19

1994-03-29

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264153, 2642974, 264321, 26433119, 264DIG13, 264DIG48, B29C 6720

Patent

active

052982076

ABSTRACT:
A method for producing a filter for use in a fuel flow rate regulating mechanism has a first step of providing a sheet of microcellular polymer material having upper and lower surfaces, each of the surfaces being fused to prevent fuel flow through the surfaces. The sheet of microcellular polymer material also has formations of continuous air bubbles between the upper and lower surfaces. The method for producing a filter has a second step of heat pressing in the direction of thickness to rearrange certain of the air bubbles, redefining same as independent, nonconnected air bubbles. The method for producing a filter has a third step of transversely punching from the sheet a filter element of prescribed configurations.

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patent: 3961876 (1976-06-01), Chernock
patent: 4228076 (1980-10-01), Pettingell
patent: 4442064 (1984-04-01), Myers et al.
patent: 4478570 (1984-10-01), Johansson
patent: 4576769 (1986-03-01), Hargett
patent: 4656906 (1987-04-01), Mozieka et al.
patent: 4850579 (1989-07-01), Fisher

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