US4945364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Page printer
Assignee: Seiko Epson Corp
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Filing: 1989-09-06
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Granted: 1990-07-31
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Expires: 2009-09-06
Abstract
Abstract A page printer having a housing body and including a gate roller, a developing unit, a photo-sensitive drum unit, a fixing unit and a sheet discharging roller arranged on the front side of the housing body in the order stated from above so that the printing sheet conveying path is substantially vertical to reduce floor area required for installation. An optical writing unit is provided on the rear side of the housing body. Guide members are provided on the housing body to readily mount or demount the photo-sensitive drum unit. Further, a shield board is disposed between the photo-sensitive drum unit and the fixing unit so that the printing sheet will not be stained by toner scattering from the photo-sensitive drum.
Inventors
- 👤 Mitsuaki Maruyama
- 👤 Hiroshi Niki
- 👤 Shigeru Sawada
- 👤 Seiji Mochizuki
- 👤 Yasuhiro Gyoutoku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:11
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1828; G03G21/1832; G03G21/1604; G03G21/1623; G03G21/1633; G03G21/1642; G03G21/1652; G03G21/1839; G03G21/1842; G03G21/1853; G03G2221/00; G03G2221/16; G03G2221/1651; G03G2221/1654; G03G2221/1672; G03G2221/1678; G03G2221/18; G03G2221/183; G03G2221/1846
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A page printer comprising: a housing including a housing body and a cover pivotally coupled to a lower end of said housing body; a gate roller, a developing unit, a photo-sensitive drum unit, a fixing unit and a sheet discharge roller arranged on a front side of said housing body; an optical writing unit provided on a rear side of said housing body; and guide means provided on said housing body, for guiding said photo-sensitive drum unit obliquely downwardly toward the rear side of said housing body.
Claim 2
Dependent Claim
87 words
A page printer comprising: a housing including a housing body and a cover pivotally coupled to a lower end of said housing body; a gate roller, a developing unit, a photo-sensitive drum unit, a fixing unit and a sheet discharge roller arranged on a front side of said housing body; an optical writing unit provided on a rear side of said housing body; and guide means provided on said housing body, for guiding said photo-sensitive drum unit obliquely downwardly toward the rear side of said housing body.
Claim 3
Dependent Claim
52 words
A page printer as in claim 1, wherein said photo-sensitive drum unit comprises a base having at least one handle on a front end portion thereof, a photo-sensitive drum mounted on the front end portion of said base, and a waste toner tank provided on a rear end portion of said base.
Claim 4
Dependent Claim
70 words
A page printer as in claim 1, wherein said photo-sensitive drum unit comprises a base having at least one handle on a front end portion thereof, a photo-sensitive drum mounted on the front end portion of said base, a waste toner tank provided on a rear end portion of said base, and a blade disposed below said photo-sensitive drum when said photo-sensitive drum unit is mounted on said housing body.
Claim 5
Dependent Claim
77 words
A page printer comprising: a housing including a housing body and a cover pivotally coupled to a lower end of said housing body; a gate roller, a developing unit, a photo-sensitive drum unit, a fixing unit and a sheet discharging roller arranged on a front side of said housing body; an optical writing unit provided on the rear side of said housing body; and a shield board disposed between said photo-sensitive drum unit and said fixing unit.
Claim 6
Dependent Claim
77 words
A page printer comprising: a housing including a housing body and a cover pivotally coupled to a lower end of said housing body; a gate roller, a developing unit, a photo-sensitive drum unit, a fixing unit and a sheet discharging roller arranged on a front side of said housing body; an optical writing unit provided on the rear side of said housing body; and a shield board disposed between said photo-sensitive drum unit and said fixing unit.
Claim 7
Dependent Claim
88 words
A page printer having a front side and a rear side comprising: a plurality of paper processing units including a gate roller, a developing unit, a photo-sensitive drum unit, a fixing unit and a sheet discharge roller provided on the front side of said page printer; an optical writing unit provided on the rear side of said printer; a partition wall disposed between said optical writing unit and said plurality of paper processing units; and a shield board disposed between said photo-sensitive drum unit and said fixing unit.
Claim 8
Dependent Claim
88 words
A page printer having a front side and a rear side comprising: a plurality of paper processing units including a gate roller, a developing unit, a photo-sensitive drum unit, a fixing unit and a sheet discharge roller provided on the front side of said page printer; an optical writing unit provided on the rear side of said printer; a partition wall disposed between said optical writing unit and said plurality of paper processing units; and a shield board disposed between said photo-sensitive drum unit and said fixing unit.
References Cited (Backward Citations)
US4664504A
Cited
US4618137A
Cited
JPS62151871A
Cited
JPS62169169A
Cited
EP0240337A2
Cited
US4754293A
Cited
US4752801A
Cited
US4785319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |