Protective screw cap for the writing point of a tube writing pen

Details Protective screw cap for the writing point of a tube writing pen Protective screw cap for the writing point of a tube writing pen

1975-09-30

1976-06-15

Charles, Lawrence

Coating implements with material supply

Including stylus

B43K 900, B43K 100

Patent

active

039633594

ABSTRACT:
A receptacle or protective cap for the writing point of a tube writing pen, the pen comprising a writing cone provided with a writing tube and fitted into a sleeve, there being an ink equalization chamber in a space between the cone and the sleeve, wherein the cap comprises an open-ended hollow body adapted to be secured over the sleeve by its open end, the other end being closed, and wherein the cap has an improved inner annular sealing face for engaging against the end of the sleeve when the cap is secured over the sleeve, the sealing face being formed by a layer of soft resilient material attached to an annular rigid base.

REFERENCES:
patent: 962053 (1910-06-01), Rottenburg
patent: 3475103 (1969-10-01), Danjczek
patent: 3802788 (1974-04-01), Danjczek

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