Patent US4569084A successfully refreshed from Google Patents.
Patent US4403233A successfully refreshed from Google Patents.
US4403233A
Expired / Lapsed
US
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Ink jet apparatus
Assignee: Canon Inc
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Filing: 1982-01-15
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Granted: 1983-09-06
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Expires: 2002-01-15
Abstract
Abstract An ink jet apparatus comprises an ink jet nozzle, a cap capable of fitting said ink jet nozzle, and a suction means for supplying negative pressure to the ink jet nozzle and a ink-storage vessel in communication with said ink jet nozzle, characterized in that the suction means is provided with at least two independent suction chambers, with at least one of the suction chambers being in communication with the ink-storage vessel, and with at least the other suction chamber being in communication with the cap.
Inventors
- 👤 Koji Terasawa
- 👤 Shigemitsu Tazaki
- 👤 Shigeru Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:08
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/165; B41J2/16517; B41J2/1652; B41J2/16505; B41J2/16508
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
An ink jet apparatus comprising an ink jet nozzle, a cap capable of fitting said ink jet nozzle, and a suction means for supplying negative pressure to the ink jet nozzle and an ink-storage vessel in communication with said ink jet nozzle, wherein said suction means is provided with at least two independent suction chambers with at least one of the suction chambers being in communication with the ink-storage vessel, and with at least the other suction chamber being in communication with said cap.
Claim 2
Dependent Claim
84 words
An ink jet apparatus comprising an ink jet nozzle, a cap capable of fitting said ink jet nozzle, and a suction means for supplying negative pressure to the ink jet nozzle and an ink-storage vessel in communication with said ink jet nozzle, wherein said suction means is provided with at least two independent suction chambers with at least one of the suction chambers being in communication with the ink-storage vessel, and with at least the other suction chamber being in communication with said cap.
Claim 3
Dependent Claim
15 words
An ink jet apparatus according to claim 1, wherein said suction means is a pump.
Claim 4
Dependent Claim
26 words
An ink jet apparatus according to claim 2, wherein said pump is provided with a cylinder and a piston which comprise stepwise portions having different diameters.
Claim 5
Dependent Claim
27 words
An ink jet apparatus according to claim 1, wherein said suction chambers are constructed so that each is in communication with the atmosphere through a separate valve.
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) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |