Replaceable unit having a function of identifying a new/used state thereof and apparatus operable with the replacement unit
US6483995B2 · kind B2 · utility
9Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2001 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Feb 14, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A replaceable unit to be placed in an apparatus, is provided with a relay which includes a latching type switch and outputs a new/used identification signal which indicates whether the replaceable unit is new or used depending on open and closed states of the switch, a detecting part which detects an operating state within the replaceable unit and outputs a state detection signal indicating the operating state, and a single signal line which is used in common for transferring the new/used identification signal and the state detection signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.