Pinch roll for a release material delivery system
US5420678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1994 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Jun 30, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2093
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fuser apparatus for heat fusing toner images to print substrate comprising an elongated fuser roll and an elongated pressure roll. The pressure roll is supported for pressure engagement with the fuser roll to form a nip therebetween adapted to receive substrates. An oil impregnated web material and an elongated pinch roll are provided. The pinch roll has an outer surface mounted against the web material to urge the web material into contact with the fuser roll to apply release material to the fuser roll. The outer surface includes a first portion having a diameter and a length, a second portion having a diameter and a length, and a third portion having a diameter and a length. The first portion diameter is greater than the second and third portion diameter. The first portion, second portion and third portion are spaced along the axis of the pinch roller. The second portion and third portion are located at opposite ends of the pinch roll. The first portion adjoins between the second portion and the third portion, thereby when the pinch roll is mounted against the web material into contact with the fuser roll to apply release material to the fuser roll a lesser amount of release ma…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.