Heated drum assembly having a multiple speed fan for use in a printer
US7725050B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2008 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Dec 5, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/206
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A heated drum assembly improves thermal control of a rotating drum in a printer. The assembly includes a hollow drum, two stationary heaters located within an internal cavity of the drum, one of the two stationary heaters being at one end of the drum and the other stationary heater being at another end of the drum, a fan located at one end of the drum, a temperature sensor at one end of the drum, and a second temperature sensor at the other end of the drum, and a controller electrically coupled to the heaters, the fan, and the two temperature sensors to control a temperature of the wall of the drum to a set point by activating at least one of the heaters in response to a signal indicating a temperature below a first predetermined temperature threshold and operating the fan at one of three speeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.