Retractile mechanism for refill of writing instrument

Details Retractile mechanism for refill of writing instrument Retractile mechanism for refill of writing instrument

2005-08-02

2005-08-02

Walczak, David J. (Department: 3751)

Coating implements with material supply

Projectable and retractable tool

Projection by movement of implement

C401S104000, C401S105000

Reexamination Certificate

active

06923588

ABSTRACT:
A retractile mechanism for refills of writing instrument includes an outer tube, a refill, an inner tube, and a compression spring. When a pen nib is thrown forth, an inner tube with load pushes the refill moving forwards by inertia; while a projecting edge on the inner tube passes through a button hole of the outer tube, an elastic button inserts through the button hole, presses and locks with the projecting edge; the inner tube and the extended nib point are ready for writing; when the elastic button is pulled out, both the inner tube and the refill retracts by the pushing of the compression spring, back to the storage status.

REFERENCES:
patent: 2813511 (1957-11-01), Kersten

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