US4276554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet mechanism for purging and activating
Assignee: Canon Inc
•
Filing: 1980-01-03
•
Granted: 1981-06-30
•
Expires: 2000-01-03
Abstract
Abstract An ink jet mechanism is disclosed which is able to recover an ink jet head from nozzle blockage, meniscus retrogradation or other functional failure. The mechanism includes a diaphragm and a device for generating an electric signal. The signal generating device detects the application of pressure on the diaphragm and generates an electric signal in response to it.
Inventors
- 👤 Koji Terasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:59
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/165; B41J2/16517; B41J2/1652
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
43 words
An ink jet mechanism comprising: an ink jet head; a diaphragm for recovering said ink jet head from nozzle blockage and meniscus retrogradation when pressure is applied; and means for generating an electric signal in response to a pressing operation of said diaphragm.
Claim 2
Dependent Claim
43 words
An ink jet mechanism comprising: an ink jet head; a diaphragm for recovering said ink jet head from nozzle blockage and meniscus retrogradation when pressure is applied; and means for generating an electric signal in response to a pressing operation of said diaphragm.
Claim 3
Dependent Claim
18 words
An ink jet mechanism according to claim 1 wherein said electric signal contains information of power source cut-in.
Claim 4
Dependent Claim
18 words
An ink jet mechanism according to claim 1 wherein said electric signal contains information of print mode setting.
Claim 5
Dependent Claim
22 words
An ink jet mechanism according to claim 1 wherein said electric signal contains test jet instruction information of said ink jet head.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |