Ink-jet apparatus and driving method thereof
US5736994A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1996 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Jun 18, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A first pulse signal A of a first drive waveform used when an ambient temperature is 25.degree. C. or less has a peak value of 22 (V). The pulse width WA of the first pulse signal A matches with time T during which a pressure wave uni-directionally travels along the inside of an ink flow passage. A second drive waveform used when the ambient temperature is in excess of 25.degree. C. includes a second pulse signal B used for ejecting ink and a third pulse signal C used for compensating for variations in a residual pressure within the ink flow passage occurs after the ink has been ejected. Both the second pulse signal B and the third pulse signal C have a peak value of 22 (V). The pulse width WB of the second pulse signal B is 0.7 times the uni-directional propagation time T, whereas the pulse width WC of the third pulse signal C is half the uni-directional propagation time T. A delay time D between center time T1M of the second pulse signal B and center time T2M of the third pulse signal C is 3.0 times the uni-directional propagation time T. As a result, it is possible to implement an inexpensive ink-jet apparatus and a driving method thereof which prevent variations in an ink jet v…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.