Method of manufacturing a push button keyboard

Details Method of manufacturing a push button keyboard Method of manufacturing a push button keyboard

1982-03-22

1984-07-10

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Cutting and uniting cut parts

29413, 29416, 29418, 29453, 264242, 264255, 2643287, B29H 704

Patent

active

044592566

ABSTRACT:
A method of manufacturing one or more push buttons and an associated case in two work operations by injection molding. Button and case are molded in the first operation so that the button is integral with the case via two joining members formed on either side of the button. In the second operation a portion is molded under the button for contact with a connection mat or so-called "keypad", the portion being formed with locking lugs for limiting upward movement of the button after depression. Pressure is applied to the upper surface of the button to rupture the joining members and separate it from the case while operatively positioning the lugs with respect to lugs molded in the first step with the case.

REFERENCES:
patent: 2607957 (1952-08-01), Danielson et al.
patent: 3100929 (1963-08-01), Nisper
patent: 3489342 (1970-01-01), Anderson
patent: 3594898 (1971-07-01), Lewandowski
patent: 3684125 (1972-08-01), Laurizio
patent: 4057710 (1977-11-01), Willmott
patent: 4082200 (1978-04-01), Guest et al.
Bixler, L. C., IBM Technical Disclosure Bulletin, vol. 16, No. 3, 1973, p. 954.
Duranske, R. G., IBM Technical Disclosure Bulletin, vol. 20, No. 9, 1978, p. 3614.

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