Anti-unraveling device for a fuser oil supply web
US6292646A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Oct 14, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2093
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus and method are provided for preventing unraveling of an oil supply web by the selective application of a locking mechanism to a web supply roller when a fuser hot roller or other fuser drive roller is forced to rotate in a reverse rotation. The locking mechanism is released when the fuser hot roller resumes normal rotation. A pivoting arm is adapted for pivotal movement into locking engagement with the web supply roller. A braking element, such as a ratchet latch, attached to the end of the pivoting arm, or pawl, contacts a rotary follower or other rotational member connected to and operable to prevent rotation of the web supply roller. The braking element is disengaged when the fuser hot roller resumes rotation in the normal direction, as the pawl is pivoted out of engagement with the rotary follower. In this manner, the web operates to lubricate and condition the fuser hot roller from controlled rotation of the web supply roller when the fuser hot roller is rotating in the normal direction, and is prevented from unraveling when the fuser hot roller is rotated in a reverse direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.