Electrophotographic recording apparatus indicating a wear rate for consumable parts
US5101233A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1991 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Feb 13, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/183
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an electrophotographic recording device which includes a number of consumable parts, there is provided a first memory for storing a currently integrated total number of prints, and a number of prints at replacement of each consumable part. A second memory stores a number of lifetime prints, which is a conversion of the life of each part into a number of prints. A processor performs a first calculation to calculate a number of prints for replaced consumable parts after such replacement and a second calculation to calculate a wear rate of the replaced consumable parts from the number of lifetime prints read out from the second memory, and from the number of prints calculated by the first calculation. An indication section indicates the wear rate obtained from the second calculation. The number of prints stored in the first memory for the consumable parts at replacement is written into the current total number of prints.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.