Flexible pen with sliding sleeve

Details Flexible pen with sliding sleeve Flexible pen with sliding sleeve

1987-05-15

1988-03-08

Bratlie, Steven A.

Coating implements with material supply

Projectable and retractable tool

Manually reciprocable sleeve

401116, 401209, 401214, B43K 900, B43K 700

Patent

active

047296860

ABSTRACT:
A pen comprises an elongated one-piece barrel having substantially rigid tip end and head end portions joined to each other by an intermediate integral flexible portion, whereby the barrel can be bent at the flexible portion, and a writing tip at the distal end of the tip end portion. A substantially rigid tubular cap member is telescopically received over the tip end portion of the barrel such that it can be moved along the barrel between (1) a retracted position in which it overlies part of the tip end portion and substantially all of the flexible portion, thus exposing the writing tip for use and rendering the pen substantially rigid, and (2) an extended position in which it covers the writing tip and leaves the flexible portion exposed, thus protecting the writing tip and rendering the pen flexible. Interengaging coupling elements on the cap and the tip end portion of the barrel releasably retain the cap member in each of the retracted and extended positions. Longitudinal movement of the cap member is controlled by vestigial threads on the barrel that are formed by rows of helical ribs on opposite sides of the tip end portion and that interact with internal protrusions on the cap member.

REFERENCES:
patent: 4580919 (1986-04-01), Ambasz
patent: 4679954 (1987-07-01), Ambasz

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