US3848566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Donor apparatus
Assignee: Xerox Corp
•
Filing: 1972-05-10
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Granted: 1974-11-19
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Expires: 1992-05-10
Abstract
Abstract A developing system for latent images wherein a rotating fur brush receives marking particles from a donor assembly comprising a plurality of discrete elongated donor members which are successively moved through a closed path defining a volume within a sump housing, a portion of the defined volume being occupied by marking particles contained in the housing. The donor members may be circular, crescentic, or other configurational cross-sections and may or may not cooperate with a doctor blade. They may be in the form of taut flexible elements which are vibrated slightly to remove excessive toner. In certain embodiments, a striking element in the form of a thin taut but flexible wire or other material is used to charge and fluff the fibrous applicator as well as redistribute undesirable concentrations of toner within the applicator.
Inventors
- 👤 K Stange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:37
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0805
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
A developing system for latent patterns employing electroscopic marking particles comprising: a cylindrically shaped applicator adapted to be rotated about an axis and capable of holding electroscopic marking particles; a plurality of elongated donor members each having a surface portion capable of attracting electroscopic marking particles; support means for supporting each of said donor members substantially in spaced parallel relation with each other; means coupled to said support means for moving said donor members through a closed path, a portion of which brings said donor members successively into contact with said applicator; a shroud partially enclosing said applicator at least along its axial dimensions and having engageable areas thereon; and a housing resiliently engaged with said areas on said shroud and adapted to support a quantity of electroscopic marking particles adjacent said closed path, said housing being detachable from said shroud by moving said housing from said areas.
Claim 2
Dependent Claim
148 words
A developing system for latent patterns employing electroscopic marking particles comprising: a cylindrically shaped applicator adapted to be rotated about an axis and capable of holding electroscopic marking particles; a plurality of elongated donor members each having a surface portion capable of attracting electroscopic marking particles; support means for supporting each of said donor members substantially in spaced parallel relation with each other; means coupled to said support means for moving said donor members through a closed path, a portion of which brings said donor members successively into contact with said applicator; a shroud partially enclosing said applicator at least along its axial dimensions and having engageable areas thereon; and a housing resiliently engaged with said areas on said shroud and adapted to support a quantity of electroscopic marking particles adjacent said closed path, said housing being detachable from said shroud by moving said housing from said areas.
Claim 3
Dependent Claim
20 words
The combination recited in claim 1 wherein said shroud is made of metal and said housing is made of plastic.
Claim 4
Dependent Claim
21 words
The combination recited in claim 1 wherein said engageable surfaces comprise outwardly extending flanges for interfitting with grooves in said housing.
Claim 5
Dependent Claim
109 words
A developing system for latent patterns employing electroscopic marking particles comprising: a cylindrically shaped applicator adapted to be rotated about an axis and capable of holding electroscopic marking particles; a plurality of elongated donor members each having a surface portion capable of attracting electroscopic marking particles, at least one of said donor members having a crescentric cross-section; support means for supporting all of said donor members substantially in spaced parallel relation with each other with openings between adjacent members; and means coupled to said support means for moving said donor members through a closed path, a portion of which brings said donor members successively into contact with said applicator;
Claim 6
Dependent Claim
109 words
A developing system for latent patterns employing electroscopic marking particles comprising: a cylindrically shaped applicator adapted to be rotated about an axis and capable of holding electroscopic marking particles; a plurality of elongated donor members each having a surface portion capable of attracting electroscopic marking particles, at least one of said donor members having a crescentric cross-section; support means for supporting all of said donor members substantially in spaced parallel relation with each other with openings between adjacent members; and means coupled to said support means for moving said donor members through a closed path, a portion of which brings said donor members successively into contact with said applicator;
Claim 7
Dependent Claim
21 words
The combination recited in claim 4 wherein said donor members jointly define an open volume into which said toner particles move.
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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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |