Fixing apparatus for electrophotography
US4188109A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1976 |
| Grant date | Feb 12, 1980 |
| Priority date | — |
| Expiry date | Jun 21, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2092
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Two fixing rollers are mounted on shafts and rotated to pressingly feed a copy sheet therebetween to fix a toner image to the copy sheet. Spring force is applied to the ends of the shafts to urge the rollers together. The axes of the shafts define an acute angle therebetween to offset a tendency for the pressing force to decrease toward the center of the rollers due to deflection of the shafts and rollers. Feed rollers feed the copy sheet into the bite of the fixing rollers at a speed which is faster than the speed that the fixing rollers feed the copy sheet therebetween. The copy sheet is therefore fed through the fixing rollers in a slackened condition which prevents wrinkling of the copy sheet due to the angle between the shafts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.