Cartridge life detecting system
US5572292A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1995 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Apr 11, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/1823
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a cartridge life detecting system which detects and manages the life of a cartridge by mounting a memory on a print cartridge comprising at least an image formation member removably mounted on a main body of an image formation apparatus, carrying out operation to obtain information about the life of the cartridge based on contents read from the memory and criterial information of the life of the cartridge, and writing information about the life in the memory, comprises the steps of setting a value corresponding to the life of the cartridge by selecting one among combination of the number of printed sheets and the number of rotations of the image formation member, combination of the number of printed sheets and the number of pixels of image information, and combination of the number of printed sheets, the number of rotations of the image formation member and the number of pixels of image information, storing the value in the memory in advance, and making determination as to the life of the cartridge based on the value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.