US4989045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removal and addition of developer to a toner module in an electrophotographic print engine
Assignee: Sharp Corp
•
Filing: 1989-05-01
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Granted: 1991-01-29
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Expires: 2009-05-01
Abstract
Abstract A toner module has a mixing roller and a decorator roller. The decorator roller, which extends partially through a developer opening, has a partial magnetic core enclosed by a developer carrying sleeve. Developer is removed by orientating a nonmagnetic portion of the core toward the developer opening. The decorator roller is then rotated so that the sleeve carries the used developer over the nonmagnetic portion, thereby allowing the developer to fall out of the toner module. New developer is added by orientating the magnetic portion of the core to face the developer opening. The decorator roller is then rotated so that, as the sleeve rotates over the developer to be added, the magnetic force of the developer core pulls the developer onto the sleeve and into the toner module. Orientating a magnetic portion of the mixing roller proximate to the decorator roller causes the developer to be carried further into the toner module, so as to provide for more storage volume for the developer.
Inventors
- 👤 Danny L. Slayton
- 👤 E. Neal Tompkins
- 👤 Khosrow Lak
- 👤 Charles S. Palm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:50
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1605; B; B82; B82Y; B82Y15/00; G03G15/01; G03G15/0142; G03G15/0147; G03G15/0152; G03G15/0163; G03G2215/00; G03G2215/00025; G03G2215/00029; G03G2215/00033; G03G2215/00037; G03G2215/00042; G03G2215/16; G03G2215/1647; G03G2215/1661
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
A method of removing developer from an electrophotographic print engine toner module of the type including a developer opening and a carrying surface, a portion of said carrying surface extending through said developer opening in close proximity to a photoreceptor and over a plurality of magnetized pole pieces, comprising the step of: (1) moving said toner module away from said photoreceptor; (2) orientating said toner module so that said developer opening faces downwardly; (3) moving said magnetized pole pieces away from said portion of said carrying surface so that substantially no magnetic force is present at said portion of said carrying surface; and (4) rotating said carrying surface such that said developer will be carried to said portion of said carrying surface extending through said developer opening where substantially no magnetic force is present thereby allowing said developer to fall out of said module.
Claim 2
Independent Claim
144 words
A method of removing developer from an electrophotographic print engine toner module of the type including a developer opening and a carrying surface, a portion of said carrying surface extending through said developer opening in close proximity to a photoreceptor and over a plurality of magnetized pole pieces, comprising the step of: (1) moving said toner module away from said photoreceptor; (2) orientating said toner module so that said developer opening faces downwardly; (3) moving said magnetized pole pieces away from said portion of said carrying surface so that substantially no magnetic force is present at said portion of said carrying surface; and (4) rotating said carrying surface such that said developer will be carried to said portion of said carrying surface extending through said developer opening where substantially no magnetic force is present thereby allowing said developer to fall out of said module.
Claim 3
Independent Claim
100 words
A method of replacing developer in an electrophotographic print engine toner module of the type including a developer opening and a carrying surface over a plurality of magnetized pole pieces, a portion of said carrying surface extending through said developer opening, comprising the steps of: (1) placing said developer opening proximate a supply of developer; (2) orientating said magnetized pole pieces toward said portion of said carrying surface extending through said developer opening; and (3) moving said carrying surface past said supplied developer and into the interior of said module, thereby allowing said developer to be brought into said module.
Claim 4
Independent Claim
100 words
A method of replacing developer in an electrophotographic print engine toner module of the type including a developer opening and a carrying surface over a plurality of magnetized pole pieces, a portion of said carrying surface extending through said developer opening, comprising the steps of: (1) placing said developer opening proximate a supply of developer; (2) orientating said magnetized pole pieces toward said portion of said carrying surface extending through said developer opening; and (3) moving said carrying surface past said supplied developer and into the interior of said module, thereby allowing said developer to be brought into said module.
Claim 5
Independent Claim
139 words
A method of replacing developer in an electrophotographic print engine toner module of the type including a developer opening and a carrying surface enclosing a plurality of magnetized pole pieces, a portion of said carrying surface extending through said developer opening, comprising the steps of: (1) providing a mixing roller, comprising an outer sleeve and a core having a magnetic portion and a nonmagnetic portion, within the interior of said toner module with said magnetic portion of said core proximate said carrying surface; (2) placing said developer opening proximate a supply of developer; (3) orientating said magnetized pole pieces toward said portion of said carrying surface extending through said developer opening; and (4) moving said carrying surface past said supply of developer and into the interior of said module, thereby allowing said developer to be brought into said module.
Claim 6
Independent Claim
139 words
A method of replacing developer in an electrophotographic print engine toner module of the type including a developer opening and a carrying surface enclosing a plurality of magnetized pole pieces, a portion of said carrying surface extending through said developer opening, comprising the steps of: (1) providing a mixing roller, comprising an outer sleeve and a core having a magnetic portion and a nonmagnetic portion, within the interior of said toner module with said magnetic portion of said core proximate said carrying surface; (2) placing said developer opening proximate a supply of developer; (3) orientating said magnetized pole pieces toward said portion of said carrying surface extending through said developer opening; and (4) moving said carrying surface past said supply of developer and into the interior of said module, thereby allowing said developer to be brought into said module.
References Cited (Backward Citations)
US3841751A
Cited
US3717122A
Cited
US4147541A
Cited
US3954331A
Cited
US4170195A
Cited
US4439034A
Cited
US4583832A
Cited
US4601259A
Cited
US4523834A
Cited
US4845523A
Cited
US4652115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |