Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Making hole or aperture in article
Patent
1985-02-12
1987-03-24
Silbaugh, Jan
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Making hole or aperture in article
181129, 181135, 264222, 264302, 264DIG30, B29C 3340
Patent
active
046524142
ABSTRACT:
A hollow shell-type hearing aid is prepared from an impression of the ear. A mold is formed from the impression. An opening is cut in the mold and the mold is filled through the opening with hardenable material. The hardenable material is allowed to cure until a hard shell of the material forms on the surface of the mold. The remaining hardenable material is poured out of the mold through the opening and the shell is then removed.
REFERENCES:
patent: 3440714 (1969-04-01), Ryan et al.
patent: 3883627 (1975-05-01), Fitts
patent: 3989790 (1976-11-01), Bruner et al.
patent: 4098277 (1978-07-01), Wendell
patent: 4556122 (1985-12-01), Goode
patent: 4569812 (1986-02-01), Werwath et al.
Fertig Mary Lynn
Innovative Hearing Corporation
Silbaugh Jan
LandOfFree
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