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

1976-03-01

1977-12-06

Pellegrino, Stephen C.

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

B43K 710

Patent

active

040614301

ABSTRACT:
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: 3303825 (1967-02-01), Shuman et al.
patent: 3837750 (1974-09-01), Herrnring

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