Heat fixing roll for copying machine, method of producing the same and electronic copying machine provided with the same
US5065193A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | May 18, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49544
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heat fixing roll for a copying machine includes an insulating layer formed on the surface of a hollow tube, a heating resistor layer formed on the surface of the insulating layer by uniformly thermal spray coating a resistor material, a screw-like heating resistor formed by forming a helical groove having a depth reaching the surface of the insulating layer by using a laser irradiation head connected to an electric resistance compensator, and an antisticking layer formed on the surface of the resistor and the groove by coating. The present invention also provides a method of producing the heat fixing roll and an electronic copying machine provided with the roll.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.