Camera filters and a method of making the same

Details Camera filters and a method of making the same Camera filters and a method of making the same

1980-04-29

1982-01-19

Henry, Jon W.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

350257, 156 731, G02B 700, B29C 2708, B29C 2710

Patent

active

043113648

ABSTRACT:
A filter for a camera comprises a filter plate, and a split frame formed from a thermoplastic synthetic resin and holding the filter plate therein. The frame is composed of an internally threaded front portion and an externally threaded rear portion adapted for attachment to the lens holding tube of the camera. The front and rear portions are integrally secured to each other by thermal fusion, with an adhesive, by threaded connection, and combinations thereof. Also disclosed is a method of making such a filter. The thermal fusion of the frame portions is advantageously effected by application of ultrasonic waves.

REFERENCES:
patent: 3843433 (1974-10-01), Golden et al.

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