Flow control for writing or drawing instrument

Details Flow control for writing or drawing instrument Flow control for writing or drawing instrument

1994-04-04

1995-08-22

Bratlie, Steven A.

Coating implements with material supply

Including means to apply material-moving force

Intercommunicable reservoirs or reservoir sections in series

401145, 401195, 401258, B43K 818, B43K 518, B43K 710

Patent

active

054433223

ABSTRACT:
A writing or drawing instrument including a writing tip (1) disposed at a front end of the writing instrument which can be brought into contact with a writing or drawing pad, a writing fluid reservoir (7) for supplying the writing tip (1) with writing fluid, and a writing fluid chamber (9) disposed between the writing tip (1) and the writing fluid reservoir (7). The writing fluid chamber (9) consists of a bubble of a flexible, inelastic material. The writing fluid chamber (9) is connected to the writing tip (1) on one side and is connected on the other side to a barrier (12). The barrier (12) is connected with the writing fluid reservoir (7) and can be opened in a controlled manner. When a lower fill level is reached in the writing fluid chamber (9), the barrier is briefly opened to fill the writing fluid chamber (9). During the filling of the writing fluid chamber (9), the volume of the writing fluid reservoir (7) is reduced in accordance with the consumption of the writing fluid.

REFERENCES:
patent: 3737242 (1973-06-01), Hesebeck et al.
patent: 4350458 (1982-09-01), Murahara et al.
patent: 4573819 (1986-03-01), Herrning
patent: 4634305 (1987-01-01), Herrnring
patent: 4708506 (1987-11-01), Herrnring
patent: 5336007 (1994-08-01), Jozat

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