Manufacture of a body cavity insert

Details Manufacture of a body cavity insert Manufacture of a body cavity insert

1981-12-30

1984-09-18

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Starting material is nonhollow planar finite length preform...

181135, 264510, 264222, B29C 102, B29C 1704

Patent

active

044723423

ABSTRACT:
A method of making a body cavity insert, e.g. an ear insert, comprises deforming by pressure a pressure deformable sheet of material over an impression of a body cavity, e.g. an ear canal, and separating the impression from the sheet of material without permanently disturbing the shape into which the sheet has been deformed to leave a mould cavity in the sheet of material. A moulding material is then introduced into the mould cavity to provide, when the moulding material solidifies, the body cavity insert.
Typically the pressure deformable sheet of material is a sheet of non-toxic, thermoplastics material, e.g. a polycarbonate or silicon rubber material. One example of a suitable moulding material is an acrylic plastics material.

REFERENCES:
patent: 2474676 (1949-06-01), Kelly
patent: 2596351 (1952-05-01), Weaver
patent: 2738850 (1956-03-01), Tooker
patent: 3021569 (1962-02-01), Lyman
patent: 3532776 (1970-10-01), Kopp
patent: 3688863 (1972-09-01), Johnson
patent: 3703572 (1972-11-01), Bellasalma
patent: 4010820 (1977-03-01), Johnson

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