Patent US6507717B2 successfully refreshed from Google Patents.
US6507717B2
Expired / Lapsed
US
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Filter unit with a rib disposed in a filter recess
Assignee: Canon Inc
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Filing: 2001-03-27
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Granted: 2003-01-14
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Expires: 2021-03-27
Abstract
Abstract A filter unit includes a corrugated filter, and a casing for containing the filter. A reinforcement member is formed by casting a resin material into at least one recess of the filter.
Inventors
- 👤 Hideki Kushida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:14
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/20; G03G21/206; B; B03; B03C; B03C3/00; B03C3/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A filter unit comprising: a corrugated filter having a series of recesses; a casing for containing the filter; and a reinforcement member formed by casting a resin material into a recess of the filter proximate to a center portion of the series of recesses, wherein the reinforcement member is filled from one end to the other end in a longitudinal direction of the recess.
Claim 2
Dependent Claim
64 words
A filter unit comprising: a corrugated filter having a series of recesses; a casing for containing the filter; and a reinforcement member formed by casting a resin material into a recess of the filter proximate to a center portion of the series of recesses, wherein the reinforcement member is filled from one end to the other end in a longitudinal direction of the recess.
Claim 3
Dependent Claim
20 words
A filter unit according to claim 1 , wherein the casing and the filter are formed into a united body.
Claim 4
Dependent Claim
17 words
A filter unit according to claim 1 , wherein the reinforcement member is in a rib shape.
Claim 5
Dependent Claim
26 words
A filter unit according to claim 1 , wherein the filter unit includes a fan, and an air duct formed in air communication with the fan.
Claim 6
Dependent Claim
28 words
A filter unit according to claim 1 , wherein the resin material is casted into a resin material casting region formed by transforming the recess of the filter.
Claim 7
Dependent Claim
32 words
A filter unit according to claim 1 , wherein a rib is formed substantially perpendicular to the corrugated shape of the filter so as to form the rib into a lattice-like structure.
Claim 8
Dependent Claim
24 words
A filter unit according to claim 1 , wherein the filter unit is arranged at an outer surrounding portion of an image forming apparatus.
Claim 9
Dependent Claim
22 words
A filter unit according to claim 7 , wherein the image forming apparatus has a photosensitive member for carrying an electrostatic image.
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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) | 2006-01-13 | 2006-07-15 | 2007-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-01-13 | 2010-07-15 | 2011-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-01-13 | 2014-07-15 | 2015-01-14 | $7700.00 | Window Closed / Lapsed |