Inkjet head device and method of controlling inkjet head
US8500256B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 1, 2011 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Jan 31, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/195
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
According to one embodiment, an inkjet device includes: an ink circulating device configured to communicate with an inkjet head to form an ink circulating system; an arithmetic unit configured to calculate, on the basis of pressure detected from the ink circulating system, pressure in an ink discharge port section according to an arithmetic expression set in advance; a pressure determining unit configured to determine, with proper nozzle pressure in the ink discharge port not discharging ink set as a reference value, whether a value calculated by the arithmetic unit is positive pressure or negative pressure with respect to the reference value; and a negative pressure regulator configured to communicate with the ink circulating system and perform, if the pressure determining unit determines that the value is the positive pressure, an ink reducing operation in the ink circulating system and increase a negative pressure value on the ink discharge port. The pressure determining unit changes the reference value to a negative pressure side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.