Process for producing spectacle frames using an age-hardenable n

Details Process for producing spectacle frames using an age-hardenable n Process for producing spectacle frames using an age-hardenable n

1975-06-27

1977-09-06

Dean, R.

Metal treatment

Compositions

Heat treating

75154, 75156, 751565, 75157, 148 127C, 148 325, 148127, 148160, C22F 108, G02C 1300

Patent

active

040465969

ABSTRACT:
There is disclosed a process for the production of a spectacle frame high in tensile strength and resistance to permanent set utilizing an age-hardenable nickel-bronze alloy which is capable of being strengthened by a heat-aging treatment step such that the tensile strength and stiffness can be substantially increased. The tendency for the frame to take a permanent set with the application of stress to the frame is, therefore, substantially reduced as compared to a similar spectacle frame not subjected to a heat-aging treatment step or spectacle frames made of alloys which cannot be strengthened by a heat-aging treatment.

REFERENCES:
patent: 2117106 (1938-05-01), Silliman

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