Method for measuring a gap between an intermediate imaging member and a print head using thermal characteristics
US7926892B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2007 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Jan 9, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J25/308
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method uses temperature measurements for a print head and an imaging member to identify a distance between a print head and an imaging member and a heat transfer function. The method includes heating an imaging member to a predetermined imaging member temperature, activating a heat source to heat a print head to a predetermined print head temperature while the print head is at a non-imaging position with reference to the imaging member, moving the heated print head to a print position with reference to the imaging member, the print position being closer to the imaging member than the non-imaging position, deactivating the heat source, measuring a first temperature for the print head in response to a first time period expiring, and identifying a distance between the print head in the print position and the imaging member from the temperature measured for the print head, the predetermined imaging member temperature, and a difference between the predetermined print head temperature and the temperature measured for the print head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.