Electrophotography apparatus
US6301450A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Sep 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/1823
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To provide an electrophotography apparatus with which the service life management of a printing unit can be carried out properly, a non-volatile memory for storing a count value for managing the service life of the printing unit is installed in both a main unit and the printing unit of the electrophotography apparatus. Then, the count value is written to the memory on the printing unit (PU) side (PU memory) when print processing is not in progress, and no power is supplied to the PU memory during print processing, so the correct count value is always stored in the PU memory. Therefore, the service life of the printing unit can be correctly evaluated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.