Dual length copier lamp
US4442374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1982 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Mar 25, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K9/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A tubular incandescent lamp for use in a fusing type lamp in a photocopy machine in which the lamp filament means is capable of operation at two different lengths on a selective basis as a function of the different lengths of paper that are to be reproduced by the copier. In one embodiment the filament means comprises a single linear filament with the contacts being taken at opposite ends of the filament for full length reproduction and along a predetermined length of the filament or shorter length of reproduction. In an alternate embodiment of the invention, two different length filaments are employed, each one selectively and mutually exclusively operated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.