Patent US4891678A successfully refreshed from Google Patents.
US4891678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic recording apparatus having a cooled and insulated waste toner container
Assignee: Ricoh Co Ltd
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Filing: 1988-06-09
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Granted: 1990-01-02
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Expires: 2008-06-09
Abstract
Abstract An electrostatic recording appartus having a thermally fixing apparatus and an image forming case adapted to accomodate a unit having a toner container disposed adjacent to a thermally fixing apparatus. An open space is provided between the wall of the image forming case and the wall of the toner container. At the upper and lower portions of the open space, vent ports are preferably provided. Heat insulating material is effectively applied to the walls defining the open space.
Inventors
- 👤 Hisao Ishizu
- 👤 Tomobumi Shibano
- 👤 Yasuhiro Sagawa
- 👤 Hiroshi Komai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:52
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1814; G03G21/10; G03G21/12; G03G21/1604; G03G21/1623; G03G21/1628; G03G21/1661; G03G21/169; G03G2221/00; G03G2221/16; G03G2221/1618; G03G2221/1639; G03G2221/1645; G03G2221/18; G03G2221/183
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
An electrostatic recording apparatus comprising: (a) a photosensitive member; (b) first means for supplying toner to said photosensitive member; (c) a thermally fixing apparatus; (d) a waste toner container having a first wall on the side of said waste toner container adjacent said thermally fixing apparatus; (e) second means for discharging waste toner from said photosensitive member to said waste toner container; and (f) an image forming case containing said waste toner container, said image forming case having a second wall on the side of said image forming case adjacent said thermally fixing apparatus, wherein: (g) an open space is provided between said first wall and said second wall; (h) vent ports are provided communicating with the top and the bottom of said open space; and (i) heat insulating material is applied to said first wall and to said second wall.
Claim 2
Dependent Claim
141 words
An electrostatic recording apparatus comprising: (a) a photosensitive member; (b) first means for supplying toner to said photosensitive member; (c) a thermally fixing apparatus; (d) a waste toner container having a first wall on the side of said waste toner container adjacent said thermally fixing apparatus; (e) second means for discharging waste toner from said photosensitive member to said waste toner container; and (f) an image forming case containing said waste toner container, said image forming case having a second wall on the side of said image forming case adjacent said thermally fixing apparatus, wherein: (g) an open space is provided between said first wall and said second wall; (h) vent ports are provided communicating with the top and the bottom of said open space; and (i) heat insulating material is applied to said first wall and to said second wall.
Claim 3
Dependent Claim
22 words
A electrostatic recording apparatus as recited in claim 1 wherein said waste toner container is detachably provided in said image forming case.
Claim 4
Dependent Claim
29 words
An electrostic recording apparatus as recited in claim 1 wherein said heat insulating material is applied to the side of said first wall opposite to said thermally fixing apparatus.
Claim 5
Dependent Claim
28 words
An electrostatic recording apparatus as recited in claim 3 wherein said heat insulating material is applied to the side of said wall opposite to said thermally fixing apparatus.
Claim 6
Dependent Claim
29 words
An electrostatic recording apparatus as recited in claim 1 wherein said heat insulating material is applied to the side of said second wall opposite to said thermally fixing apparatus.
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) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |