Method of manufacture of identical parts displaying different in

Details Method of manufacture of identical parts displaying different in Method of manufacture of identical parts displaying different in

1980-08-18

1981-12-22

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

219121L, 219121LM, 264132, 26432818, 4251744, B41M 526

Patent

active

043070477

ABSTRACT:
A method of manufacturing parts which are otherwise identical but which display different indicia such as a typewriter or the like keys which comprises the steps of injection molding a plurality of identical parts of a plastic having a filler material capable of undergoing a color change, and thereafter exposing individually the identical parts to a radiation source for changing the color of localized portions of the part to display the indicia while retaining the molded color of remaining portions.

REFERENCES:
patent: 3266393 (1966-08-01), Chitayat
patent: 3443936 (1969-05-01), Menold
patent: 3506779 (1970-04-01), Brown et al.
patent: 3549733 (1970-12-01), Caddell
patent: 3651191 (1972-03-01), Glatt et al.
patent: 3657510 (1972-04-01), Rothrock
patent: 3678141 (1972-07-01), Metcalfe et al.
patent: 4013747 (1977-03-01), Hampel
patent: 4037075 (1977-07-01), Pugsley et al.
patent: 4159414 (1979-06-01), Suh et al.

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