Method of manufacturing a plastic article having micro-openings

Details Method of manufacturing a plastic article having micro-openings Method of manufacturing a plastic article having micro-openings

1992-10-21

1993-10-19

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Utilizing transitory attached element or associated separate...

29423, B23P 1700

Patent

active

052534090

ABSTRACT:
A method of manufacturing a plastic article having micro-openings defined therein by working a semi-finished plastic structure having microrecesses defined on one side thereof, the method including, in the order recited, providing a semi-finished plastic structure having opposing first and second sides, wherein the first side of the opposing sides has microrecesses defined therein; filling the semi-finished plastic structure to cover the microrecesses with a substance which is hardenable and selectively removable; hardening the substance; machining the surface of the hardened substance to smooth it; clamping the semi-finished plastic structure onto a vacuum tensioning device with the smoothed surface of the hardened substance in contact with the vacuum tensioning device; machining the second side of the opposing sides of the semi-finished plastic structure until the microrecesses of the first side are at least partially exposed thereby defining micro-openings in the structure; and removing the hardened substance selectively from the microrecesses.

REFERENCES:
patent: 3074392 (1963-01-01), Fisher
patent: 3859713 (1978-01-01), Fiedler
patent: 4862575 (1989-09-01), Shirai et al.
patent: 4884623 (1989-12-01), Suzuki et al.
patent: 5055163 (1991-10-01), Bier et al.

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