Disposable device for sharpening leads or the like

Details Disposable device for sharpening leads or the like Disposable device for sharpening leads or the like

1975-09-19

1976-11-16

Simpson, Othell M.

Woodworking

Special-work machine

Pencil sharpening

144 289, 145 332, 145 38, B43L 2300

Patent

active

039917983

ABSTRACT:
A device is provided for sharpening leads of pencils or the like. The sharpening device is disposable and is designed to be thrown away when filled, without the necessity for cleaning out the device which inherently results in a dirty mess and in a waste of time. The sharpening device employs a minimum number of parts so as to achieve low cost and dependability in operation. A main top unit and a main lower unit are rotatably connected together without any additional elements such as nuts or the like being required. The sharpener also includes a gasket which retains the powdered graphite from the lead in the lower unit and also wipes the lead being sharpened. The outer wall of the lower unit has a truncated conical abrasive surface to effect the sharpening, with this wall being somewhat flexible to avoid breakage of the lead being sharpened. The sharpener can be mounted in place on a drafting table or the like by an adhesive disc or by a separable mounting block which is reusable.

REFERENCES:
patent: 3698456 (1972-10-01), Cho

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