Device for screwing a writing instrument tip into a writing flui

Details Device for screwing a writing instrument tip into a writing flui Device for screwing a writing instrument tip into a writing flui

1989-12-07

1991-01-01

Bratlie, Steven A.

Coating implements with material supply

Combined

811243, 401134, 401258, 411911, B43K 1500, B43K 900, B43K 2900

Patent

active

049813838

ABSTRACT:
Apparatus for screwing a writing instrument tip into a writing fluid reservoir in a writing instrument in which the connection from the reservoir to the tip, in order to supply the writing fluid to the tip, is made by the screwing action just prior to using the writing instrument, in which the writing instrument tip has at least a first working surface upon which at least a second working surface of a wrench acts, the working surfaces being formed as a ratchet and pawl which only engage in a screwing direction and permitting a relative rotation of the working surfaces in an unscrewing direction. As a result the tip cannot be unscrewed from the writing fluid reservoir, avoiding contamination, air entry or blockages.

REFERENCES:
patent: 347262 (1886-08-01), Wood
patent: 2197283 (1940-04-01), Ward
patent: 3830574 (1974-08-01), Glombitza et al.
patent: 3929152 (1975-12-01), Graham
patent: 4125051 (1978-11-01), Herkes et al.
patent: 4352614 (1982-10-01), Hirsch

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