Process for making sealing gaskets

Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern

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249 57, 249139, 264 36, 26433113, 26433115, 264DIG67, 425375, 425447, 425DIG47, B29C 3902

Patent

active

046438645

ABSTRACT:
A thread of a fluid material for gasket manufacture is deposited onto a non-planar, non-adhesive support sheet (12) from a nozzle (22) that is displaced above the support along a path corresponding to the outline of the gasket, with subsequent curing of the fluid material. The support sheet is prepared by pressing sheet material into a tridimensional shape whereby its surface contains the non-planar outline of the gasket to be manufactured; the shaped support is positioned with respect to a nozzle carried by a manipulator (20) capable of being controlled to move the nozzle with respect to the support along three independent spatial coordinates; and the nozzle is fed with said fluid material while being displaced along said non-planar outline. Preferably, the support sheet is kept flattened by vacuum against an underlying, matching surface.

REFERENCES:
patent: 2394327 (1946-02-01), Niessen et al.
patent: 3183285 (1965-05-01), Boylan
patent: 3608055 (1971-09-01), Long
patent: 3946982 (1976-03-01), Calkins
patent: 3966166 (1976-06-01), Elliott
patent: 4059564 (1977-11-01), Coughlan et al.
patent: 4350486 (1982-09-01), Croseck et al.
patent: 4519567 (1985-05-01), Rautenberg

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