Chip and supply item for imaging device, including communication
US10419641B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2018 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Apr 13, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/0097
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.