Ink maintenance sensor
US4130126A · kind A · utility
25Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | May 31, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2504
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and method for detecting and correcting for evaporation from recirculated unused ink drops in an ink jet printer. The specific gravity of the recirculating ink is compared with that of a standard by measuring the time of fall of heavy floats through reservoirs of circulated and uncirculated fluid. A significant difference in fall times is compensated by the replenishment of fluid in the recirculating ink supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.