Method and apparatus for extending and retracting the writing element of a self-retaining writing instrument
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United States of America Patent
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Apr 17, 2018
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N/A
app pub date -
Sep 29, 2015
filing date -
Sep 29, 2014
priority date (Note) -
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Abstract
The method and apparatus described herein allows for the automatic retraction and extension of the writing element of a bistable self-retaining writing instrument. The method and apparatus consists of a writing element that is joined to the end of a flexible tube or material. These are inserted through a longitudinal channel formed along the outer surface of the writing instrument and are anchored only at the end opposite the writing element. When the bistable self-retaining writing instrument transitions from a coiled to straight configuration the writing element is automatically exposed. Conversely, when pushed into its coiled configuration the writing element slides back into the channel and is thereby protected. The flexible tube or material may also act as a reservoir for a writing substrate such as ink.
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