Crayon sharpener assembly
US5875555A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1996 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Feb 9, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/5669
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A crayon sharpening assembly is disclosed comprising an axially rotating cartridge block (106) having an axial bore (178) for axial receipt of a crayon with a forward end of the crayon positioned within a cutting station (152). A pair of convergent sharpening blades (158, 160) carve a conical nose into the forward crayon end; a secondary horizontal blade (180) engages the forward crayon end and cuts an annular stepped shoulder surrounding the conical nose; and a preparatory vertical blade (188) makes a vertical circumscribing cut through the jacket of the crayon proximate the forward end, whereby restoring the forward crayon end into its manufactured form. A carrying case (12, 14) is provided having a pivotal lid (16), with the sharpener drive assembly (20, 22) built into one end wall. A drawer assembly (100) is removable from the end wall and contains the cartridge block (106) and a housing (102) for collecting shavings generated in the sharpening procedure. A bottom housing door (104) opens to allow expulsion of the shavings. Rotation of the cartridge block (106) is facilitated by an electrically driven drive assembly that is automatically engaged and disengaged by the respective…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.