CRAYON SHARPENER
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
May 29, 2008
app pub date -
Nov 24, 2006
filing date -
Nov 24, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A blade holder has cutting edges for cutting a frustoconical tip to sharpen a crayon and also for cutting a sleeve wrapping the crayon. Outlet apertures in the blade holder allow the swarf to escape during sharpening. A serrated knife is mounted to the blade holder for circumferentially scoring the sleeve, weakening the cut strip of sleeve or breaking it up to avoid clogging of the outlet apertures. The blade holder includes a coupling by which it may be connected without tools to a mating motor-driven coupling, while ensuring proper axial alignment. A female coupling has an aperture extending between first and second mouth portions in a transverse side and longitudinal end of the first coupling respectively, and joined by a slotted mouth portion. The mating male coupling has a neck terminating in a head at an axial end of the neck. The neck being sized to pass through the slotted mouth portion, and the head being sized to pass transversely through the first mouth portion. Interengagement of drive faces transmits torque between the female and male couplings.
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