Dual sharpener apparatus for maintaining the sharpness of the cutting edge on blades used to cut sheet-type work materials
US6748836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1999 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Jan 8, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/313
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A sheet material cutting apparatus includes a cutting head and a knife frame rotatably coupled to the cutting head. A blade defining a cutting edge is coupled for reciprocation to the knife frame, as is a primary sharpener for sharpening substantially the entire cutting edge of the blade after it becomes dull from operation. A presser foot having a secondary sharpener mounted thereon, is also coupled to the knife frame for movement between a raised non-working and a lowered working position. The secondary sharpener includes a sharpening member engageable with the cutting edge of the blade via the action of an actuator, for sharpening a portion of the blade's cutting edge between primary sharpening operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.