Socket structure for the ball of a ball point pen refill

Details Socket structure for the ball of a ball point pen refill Socket structure for the ball of a ball point pen refill

1977-06-24

1979-02-13

Mack, John H.

Chemistry: electrical and wave energy

Processes and products

204 37R, 204 40, C25D 704, C25D 550

Patent

active

041394240

ABSTRACT:
A method of making a socket structure for a ball point refill, which comprises a ball made of corundum and arranged inside an outer supporting shell provided in its interior with a compound bearing consisting of a backing shell having a hardness exceeding 800 kg/sq. mm Vickers and an inner lining facing the ball and having a hardness of less than 200 kg/sq. mm Vickers.

REFERENCES:
patent: 2678909 (1954-05-01), Jernstedt
patent: 2696466 (1954-12-01), Beaver, Jr.
patent: 2771409 (1956-11-01), Cross
patent: 3551302 (1970-12-01), Woods et al.
patent: 3666636 (1972-05-01), Tomaszewski

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