Fixing device
US6239411A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1996 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Oct 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/0095
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing device for heating and fixing an unfixed image to a record member, including: a heating roller having a core roller and a layer of a resistance heating material formed on an outer or inner peripheral surface of the core roller; a pair of carriers rotatably carrying the heating roller; a pair of ring-shaped current receiver members each located between the carrier and a center of the heating roller, a pair of current supply members being in contact with the current receiver members; and insulating members made of an electrical insulation material, each being in contact with an outer end of the current receiver member and extending toward the carrier, wherein a distance L3 from the inner end of the carrier to the outer end of the current receiver member is 1 mm or more, a sum (L1+L2) of a width L1 of the insulating member and a height L2 of the insulating member from the core roller is 2.5 mm or more, and the distance L3 and the width L1 satisfy a relationship of L3.gtoreq.L1. A heat-resistant electrical insulation layer may cover the surface of the resistance heating material layer and a temperature sensing element may be provided, a portion of the element being in contact …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.