Patent US4590495A successfully refreshed from Google Patents.
US4590495A
Expired / Lapsed
US
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Multi-color ink jet printer
Assignee: Canon Inc
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Filing: 1985-08-22
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Granted: 1986-05-20
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Expires: 2005-08-22
Abstract
Abstract Disclosed is an ink jet printer wherein a flexible member associated with an ink ejection operation of an ink jet nozzle is arranged such that a driving load of a carriage which carries the ink jet nozzle is uniform at any point along a path of movement of the carriage.
Inventors
- 👤 Shigeru Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:15
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
An ink jet printer comprising: a movable carriage mounted for reciprocating movement; sub-tank means including first and second sub-tanks mounted on said carriage and juxtaposed along the direction of movement thereof, each said sub-tank including a port facing along the direction of movement of said carriage in mutually opposing directions; main tank means including first and second main tank chambers for storing first and second inks of different colors, respectively; and a pair of flexible supply tubes, each being connected between one of said ports and one of said main tank chambers for supplying ink of a particular color to each said sub-tank from a respective said main tank chamber, said flexible supply tubes thereby being evenly arranged at the opposite sides of said sub-tank means such that the driving load of said carriage is substantially uniform along the path of reciprocating movement of said carriage.
Claim 2
Dependent Claim
146 words
An ink jet printer comprising: a movable carriage mounted for reciprocating movement; sub-tank means including first and second sub-tanks mounted on said carriage and juxtaposed along the direction of movement thereof, each said sub-tank including a port facing along the direction of movement of said carriage in mutually opposing directions; main tank means including first and second main tank chambers for storing first and second inks of different colors, respectively; and a pair of flexible supply tubes, each being connected between one of said ports and one of said main tank chambers for supplying ink of a particular color to each said sub-tank from a respective said main tank chamber, said flexible supply tubes thereby being evenly arranged at the opposite sides of said sub-tank means such that the driving load of said carriage is substantially uniform along the path of reciprocating movement of said carriage.
Claim 3
Dependent Claim
32 words
An ink jet printer according to claim 1, further comprising a plurality of ink jet nozzles mounted on said carriage, wherein said plurality of ink jet nozzles eject inks of different colors.
Claim 4
Dependent Claim
17 words
An ink jet printer according to claim 1, wherein said carriage is driven by a linear motor.
Claim 5
Dependent Claim
58 words
An ink jet printer according to claim 1, further comprising a plurality of flexible suction tubes for sucking excess air from said sub-tank chambers, said flexible suction tubes being evenly arranged at the opposite sides of said sub-tank means such that the driving load of said carriage is substantially uniform along a path of movement of said carriage.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |