Toner fixing apparatus
US5987294A · kind A · utility
6Cited by
9References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1998 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Jan 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2093
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing apparatus including a heat roller having a heat source therein; and first and second pressing rollers arranged to be pressed sequentially against the heat roller beginning with a more upstream pressing roller in a direction of rotation of the heat roller, wherein when the hardness of the heat roller is Hh, the hardness of the first pressing roller is Hp1 and the ratio of the hardness of the two rollers satisfies Hr1=Hh/Hp1, the heat roller and the first pressing roller are structured in such a manner that the following condition is satisfied: Hr1.gtoreq.1.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.