Sharpener
US6279237A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Sep 10, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43L23/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A sharpener (1) contains a housing (5) with a blade (13) which is screwed on said housing and forms a tangent to a hollow-conical region (6b) of a guide channel (6) for the pencil (2), said hollow-conical region adjoining a hollow-cylindrical region (6a), a bending edge (19) being formed in the process. In the fixed position, the blade (13) is subjected to bending stressing in that, with the outer end (14) of the blade (13) being guided beneath the housing-side protrusion (16), the inner end (18) of said blade is fixed on the housing (5), the blade (13) being bent about the bending edge (19) in the process. This thus provides particularly secure and space-saving blade fixing (12) at both ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.