Recording apparatus having abnormality determination based on temperature and average ejection duty cycle
US6505907B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2002 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Jun 6, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/13
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A recording apparatus and method of controlling the apparatus includes a recording head for ejecting liquid ink for recording by heat energization, a temperature change rate detecting device for detecting the temperature change rate of the recording head in a normal state, a storage device for storing the temperature change rate information, a determining device for determining the average ejection duty cycle from recording data, an obtaining device for obtaining information relating the temperature change rate in the normal state to the average ejection duty cycle, and a discriminating device for discriminating an abnormality of the recording head determined by the information relating the temperature change rate in the normal state to the average ejection duty cycle, and the temperature change rate detected by the temperature change rate detecting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.