US4876577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-component photoreceptor cartridge unit
Assignee: Sharp Corp
•
Filing: 1988-09-26
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Granted: 1989-10-24
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Expires: 2008-09-26
Abstract
Abstract A cartridge unit for use in an image forming apparatus, in which a separating unit including a separating tape normally comparatively easily soiled by toner, is provided as one unit together with a photoreceptor drum, corona charger and cleaner unit in the cartridge unit, whereby cleaning of the separating parts at the site of the user is made unnecessary so as to achieve a maintenance-free operation.
Inventors
- 👤 Mitsuru Ogura
- 👤 Kimihide Tsukamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:03
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1828; G03G21/1832; G03G15/00; G03G15/65; G03G15/6532; G03G2221/00; G03G2221/16; G03G2221/1651; G03G2221/1654; G03G2221/1672; G03G2221/18; G03G2221/183; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A photoreceptor cartridge unit for use in an image forming apparatus for accommodating a photoreceptor drum and its peripheral components in said image forming apparatus, which comprises a housing, a photoreceptor drum rotatably provided in said housing, a cleaner unit including a used toner containing and a multi-component separating unit, which includes a separating unit frame and a separating tape for separating copy paper from the photoreceptor drum following image transfer, mounted on said housing of said cartridge unit, sequentially disposed around said photoreceptor drum, said housing, photoreceptor drum, cleaner unit and separating unit being formed into one single unit to constitute said cartridge unit which is detachable with respect to said image forming apparatus, said separating tape being stretched so as to freely expand and contract between said separating unit frame via a spring and said housing of said photoreceptor cartridge unit, such that proper tension on said separating tape is applied upon the fixing of said multi-component separating unit to said housing.
Claim 2
Dependent Claim
164 words
A photoreceptor cartridge unit for use in an image forming apparatus for accommodating a photoreceptor drum and its peripheral components in said image forming apparatus, which comprises a housing, a photoreceptor drum rotatably provided in said housing, a cleaner unit including a used toner containing and a multi-component separating unit, which includes a separating unit frame and a separating tape for separating copy paper from the photoreceptor drum following image transfer, mounted on said housing of said cartridge unit, sequentially disposed around said photoreceptor drum, said housing, photoreceptor drum, cleaner unit and separating unit being formed into one single unit to constitute said cartridge unit which is detachable with respect to said image forming apparatus, said separating tape being stretched so as to freely expand and contract between said separating unit frame via a spring and said housing of said photoreceptor cartridge unit, such that proper tension on said separating tape is applied upon the fixing of said multi-component separating unit to said housing.
Claim 3
Dependent Claim
91 words
The cartridge unit of claim 1, wherein said separating unit includes said frame, said separating tape stretched on said frame and means for separating copy paper sheets from said photoreceptor drum in cooperation with said separating tape, said separating unit being formed as a single unit as a part of said cartridge unit, forming a unit within a unit, such that upon filling of said toner container and contamination of said cartridge unit, including said separating unit, said cartridge unit may be readily replaced providing a maintenance free image forming apparatus.
Claim 4
Dependent Claim
32 words
A cartridge unit as in claim 2, wherein said cartridge unit is detachable with respect to said image forming apparatus main body through a guide mechanism including guide rails and guide members.
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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |