Thermal printhead operation
US6846055B2 · kind B2 · utility
2Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2001 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Feb 8, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G23/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of operating a thermal printhead includes the steps of periodically determining a current value proportional to the resistance of printhead elements; providing a warning signal when the current value of any element exceeds a predetermined multiplier of the nominal value; and then modifying the operation of the printhead so that such element is energized only for the printing of a barcode within the printed area. An apparatus, especially a weighing apparatus, for carrying out such a method is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.