US4719479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bundled-tube filter for recording apparatus
Assignee: Canon Inc
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Filing: 1986-08-05
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Granted: 1988-01-12
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Expires: 2006-08-05
Abstract
Abstract A recording apparatus in which ink flows out from the end of a recording head to effect recording on a recording medium, has in a portion of an ink supply path leading from an ink container to the recording head a filter substantially parallel to the direction of liquid flow in the supply path and having a number of minute communication bores.
Inventors
- 👤 Hiroshi Kyogoku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:58
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/16; G01D15/18; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175; B41J2/17563
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
A recording apparatus in which ink can flow from the end of a recording head to effect recording on a recording medium, comprising an ink supply path leading from an ink container to the recording head, and a filter disposed in said supply path and having a number of minute communication bores extending linearly and substantially parallel to the direction of liquid flow in said supply path, said bores being formed by a number of tubes of a ceramic material having hydrophilic properties bundled and integrally shaped in cross-section into the form of a honeycomb substantially without spaces between said tubes, wherein the diameter d of each of said communication bores of said filter is 10-50 μm, the number of communication bores per 1 mm 2 is 20-800 and the ratio of the length L of each of said communication bores to the diameter d of each of said communication bores is at least 10.
Claim 2
Dependent Claim
155 words
A recording apparatus in which ink can flow from the end of a recording head to effect recording on a recording medium, comprising an ink supply path leading from an ink container to the recording head, and a filter disposed in said supply path and having a number of minute communication bores extending linearly and substantially parallel to the direction of liquid flow in said supply path, said bores being formed by a number of tubes of a ceramic material having hydrophilic properties bundled and integrally shaped in cross-section into the form of a honeycomb substantially without spaces between said tubes, wherein the diameter d of each of said communication bores of said filter is 10-50 μm, the number of communication bores per 1 mm 2 is 20-800 and the ratio of the length L of each of said communication bores to the diameter d of each of said communication bores is at least 10.
Claim 3
Dependent Claim
162 words
A recording device comprising a recording head, an ink supply path and a filter, wherein: said recording head is adapted to effect recording on a recording medium with ink supplied through said ink supply path from an ink container to said recording head; and said filter is disposed in said supply path and has a number of minute communication bores extending linearly and substantially parallel to the direction of liquid flow in said supply path, said bores being formed by a number of tubes of a ceramic material having hydrophilic properties bundled and integrally shaped in cross-section into the form of a honeycomb substantially without spaces between said tubes, the diameter d of each of said communication bores of said filter being 10-50 μm, the number of communication bores per 1 mm 2 being 20-800 and the ratio of the length L of each of said communication bores to the diameter d of each of said communication bores being at least 10.
Claim 4
Dependent Claim
162 words
A recording device comprising a recording head, an ink supply path and a filter, wherein: said recording head is adapted to effect recording on a recording medium with ink supplied through said ink supply path from an ink container to said recording head; and said filter is disposed in said supply path and has a number of minute communication bores extending linearly and substantially parallel to the direction of liquid flow in said supply path, said bores being formed by a number of tubes of a ceramic material having hydrophilic properties bundled and integrally shaped in cross-section into the form of a honeycomb substantially without spaces between said tubes, the diameter d of each of said communication bores of said filter being 10-50 μm, the number of communication bores per 1 mm 2 being 20-800 and the ratio of the length L of each of said communication bores to the diameter d of each of said communication bores being at least 10.
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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |