Heat and pressure fuser with non-symmetrical nip pressure
US5053829A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1988 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Oct 3, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2038
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A heat and pressure fusing apparatus for fixing toner images to substrates such as plain paper, the toner comprising a thermoplastic resin. The apparatus includes two nip forming members which cooperate to form a nip having an asymmetrical pressure profile. Thus, the pressure profile through the nip, from entrance to exit, is such that toner images on a substrate passing through the nip are first subjected to relatively low pressure which continues until the toner begins to flow. Once toner flow commences, the images are subjected to pressure high enough to force the toner into the substrate. The nip is readily variable for accommodating different fusing speeds for different processors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.