Dual airflow environmental module to provide balanced and thermodynamically adjusted airflows for a device
US6957026B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2004 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Feb 18, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/203
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic marking device includes a xerographic marking module and an environmental control module which controls temperature and relative humidity inside the marking module. The environmental module has a main plenum chamber and a divided or split plenum chamber to create and supply two air streams with different temperatures and/or different humidities and/or different airflow volumes and/or airflow rates to a marking engine. A primary air stream plenum chamber is closed loop controlled by input from one or more temperature and/or humidity sensors in the xerographic module. A secondary air stream plenum chamber is open loop controlled by means of one or more temperature and/or humidity sensors in one or mode developer housings. Heating of the secondary air stream is achieved by heat generated in the developer housing(s) and/or one or more heaters distinct from the developer unit elements. The system achieves balanced, thermodynamically adjusted, air flows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.