US4739340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet capping-purging operational checks method
Assignee: Canon Inc
•
Filing: 1986-09-30
•
Granted: 1988-04-19
•
Expires: 2006-09-30
Abstract
Abstract In a capping mechanism wherein the surroundings of orifices provided to discharge liquid are sealed and suction of the liquid is effected by a negative pressure, a liquid absorbing member is provided on a cap side below the orifices so as to be brought into contact with and compressed by a surface in which the orifices are provided.
Inventors
- 👤 Koji Terasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/165; B41J2/16505; B41J2/16508; B41J2/16511
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A method of operating an ink liquid suction device for an ink jet printer including an orifice surface surrounding at least one orifice provided to discharge ink and capping means having an absorbing member in a space therein, comprising the steps of: bringing the capping means into contact with the orifice surface such that no orifice is contacted by the capping means and the absorbing member is brought into contact with and compressed by a portion of the orifice surface located below all of the orifices; sucking ink from the orifice through the absorbing member when the capping means is in contact with the orifice member when the capping means is in contact with the orifice surface; and separating the capping means from the orifice surface and sucking ink from the absorbing member after the capping means has been separated from the orifice surface to remove from the capping means ink remaining in the absorbing member.
Claim 2
Independent Claim
156 words
A method of operating an ink liquid suction device for an ink jet printer including an orifice surface surrounding at least one orifice provided to discharge ink and capping means having an absorbing member in a space therein, comprising the steps of: bringing the capping means into contact with the orifice surface such that no orifice is contacted by the capping means and the absorbing member is brought into contact with and compressed by a portion of the orifice surface located below all of the orifices; sucking ink from the orifice through the absorbing member when the capping means is in contact with the orifice member when the capping means is in contact with the orifice surface; and separating the capping means from the orifice surface and sucking ink from the absorbing member after the capping means has been separated from the orifice surface to remove from the capping means ink remaining in the absorbing member.
Claim 3
Dependent Claim
19 words
A method according to claim 1, wherein said sucking steps are executed by a pump which generates negative pressure.
Claim 4
Dependent Claim
17 words
A method according to claim 1, wherein said steps are performed in sequence by a cam mechanism.
Claim 5
Dependent Claim
26 words
A method according to claim 1, wherein the capping means includes an elastic member for contacting the orifice surface to provide a seal around the orifices.
References Cited (Backward Citations)
US4223322A
Cited
US4306245A
Cited
US4410900A
Cited
US4371881A
Cited
US4401990A
Cited
US4432004A
Cited
US4403233A
Cited
US4437105A
Cited
US4340897A
Cited
US4577203A
Cited
US4543589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |