Universal crayon sharpener

Details Universal crayon sharpener Universal crayon sharpener

1989-10-12

1991-02-12

Terrell, William E.

Cutlery

Static pencil sharpener

With debris receiver

30454, 30455, B43L 2300

Patent

active

049912992

ABSTRACT:
The invention provides a single, universal crayon sharpener capable of accommodating many different sizes of crayons or other similar marking instruments. The invention includes asymmetrical sharpening slots and cutting flanges which cooperate with an internal guide wal to ensure the proper placement and sharpening of a large range of crayon sizes. The use of asymmetrical sharpening slots and cutting flanges, and an internal guide wall, in addition, permits the efficient reinforcement of the sharpener to resist the forces and stresses generated during the sharpening process.

REFERENCES:
patent: 338904 (1886-03-01), Worn
patent: 1270119 (1918-06-01), Conover
patent: 2502177 (1950-03-01), Sigman
patent: 2857881 (1957-06-01), Beebe et al.
A Sample of a "Double Crayon Sharpener," and its display card purchased from F. W. Woolworth Co, it is believed that this device was offered for sale more than one year before Oct. 12, 1989.
A RoseArt brand "Double Crayon Sharpener" and display card. It is believed that this device was offered for sale more than one year before Oct. 12, 1989.
Photographs of a "Color 'n Turn" device depicting the device and the display card. It is not known whether this device was offered for sale or in public use more than one year before Oct. 12, 1989.

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