Writing device with spaced walls and sliding valve

Details Writing device with spaced walls and sliding valve Writing device with spaced walls and sliding valve

1993-04-29

1994-11-08

Bratlie, Steven A.

Coating implements with material supply

Material flows through porous tool

With flow-regulator

401198, 401199, B43K 802, B43K 804

Patent

active

053621689

ABSTRACT:
A writing device including a main body portion having at the front end a writing tip through an ink flow-out control mechanism comprising a valve main body including ink introducing ports, a valve element supported in the valve main body movably forward and backward, and a coil spring for biasing a valve element in the direction of closing a valve seat inserted in the valve main body. The main body portion is formed of an inner pipe and an outer pipe, and a heat shielding space is provided between both pipes. Further, the spring pressure of the coil spring for biasing the valve element in the direction of closing the valve seat inserted in the valve main body is specified to be approximately identical to the writing pressure in writing, and a restriction portion for restricting the opening amount of the valve element against the valve seat is provided at either of the valve element or the valve main body.

REFERENCES:
patent: 550763 (1895-12-01), Osmun
patent: 1523332 (1925-01-01), Wright
patent: 2643409 (1953-06-01), Hemple et al.
patent: 3221360 (1965-12-01), Seeman
patent: 3377124 (1968-04-01), Matsumoto
patent: 3640631 (1972-02-01), Sotir
patent: 4209263 (1980-06-01), Droubay

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