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US 11,999,185 B2Granted
Pencil sharpener
OwnerFritz Lüttgensinventor
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a pencil sharpener for pencils having a lead surrounded by a lead carrier. The pencil sharpener includes a hollow guide channel for the pencil to be sharpened. An inner surface of the guide channel forms a guide surface for a partial area of a lead carrier of the pencil to be sharpened. To prevent contamination of an outer surface of the lead carrier the inner surface of the guide channel is interrupted by at least one cleaning groove extending in an axial direction of the guide channel.
Claims3
A pencil sharpener, comprising
- a hollow guide channel (1) for a pencil to be sharpened,
- wherein an inner surface of the hollow guide channel (1) forms a guide surface (3) for a partial area of a lead carrier of the pencil to be sharpened, and
- wherein the inner surface of the hollow guide channel (1) is interrupted by at least one cleaning groove (5) extending in an axial direction (2) of the hollow guide channel (1), and
- wherein a sharp-edged grooved flank (6) is arranged between the at least one cleaning groove (5) and the inner surface (3) of the hollow guide channel (1).
1 more element
Dependencies are inferred from the claim text.