US3900002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Donor apparatus
Assignee: Xerox Corp
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Filing: 1973-08-30
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Granted: 1975-08-19
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Expires: 1993-08-30
Abstract
Abstract A developing system for latent images wherein a rotating fur brush receives marking articles 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
- 👤 Klaus K Stange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0805
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
In a development system for developing latent patterns employing electrostatic marking particles: a plurality of elongated donor members each having a surface portion capable of holding marking particles thereon; support means for maintaininG adjacent ones of said donor members substantially in parallel and spaced apart, said support means including flexible linking means for coupling adjacent ones of said elongated donor members to each other; means coupled to said support means for moving said donor members through a path which defines a volume having one dimension substantially equal to the elongation of said donor members, said means coupled to said support means including at least two drive gears spaced apart in the direction of elongation of said donor members each having gear teeth spaced to accommodate the spacing between said adjacent donor members, said linking means and said coupled donor members being entrained about said drive gears; and a housing containing a quantity of marking particles and supported relative to said support means to position a portion of said quantity of marking particles within said volume.
Claim 2
Dependent Claim
175 words
In a development system for developing latent patterns employing electrostatic marking particles: a plurality of elongated donor members each having a surface portion capable of holding marking particles thereon; support means for maintaininG adjacent ones of said donor members substantially in parallel and spaced apart, said support means including flexible linking means for coupling adjacent ones of said elongated donor members to each other; means coupled to said support means for moving said donor members through a path which defines a volume having one dimension substantially equal to the elongation of said donor members, said means coupled to said support means including at least two drive gears spaced apart in the direction of elongation of said donor members each having gear teeth spaced to accommodate the spacing between said adjacent donor members, said linking means and said coupled donor members being entrained about said drive gears; and a housing containing a quantity of marking particles and supported relative to said support means to position a portion of said quantity of marking particles within said volume.
Claim 3
Dependent Claim
50 words
A donor assembly as defined in claim 1 further including a baffle positioned within said volume and remote from said portion of marking particles, said baffle extending substantially from one of said gears to the other and having one dimension substantially coextensive with the elongated dimension of said donor members.
Claim 4
Dependent Claim
164 words
In a development system for developing latent patterns employing electroscopic marking particles: a housing for holding a quantity of marking particles; support means rotatable about an axis; a plurality of axially extending donor members located in said housing and operatively connected to said support means in a generally radially spaced parallel relationship with each other; an axially extending pivotable member having a blade-like structure at one end and a plurality of fingers at the other end being pivotally mounted to a wall of said housing, said pivotable member having about the same dimension in the axial direction as said donor members, said pivotable member being so positioned that said blade-like structure will engage said donor members when they move therepast and said fingers will engage a wall of said housing during a pivoting movement of said pivotable member; and means for rotating said support means for moving each of said donor members through said housing and into engagement with and past said blade-like structure.
Claim 5
Dependent Claim
164 words
In a development system for developing latent patterns employing electroscopic marking particles: a housing for holding a quantity of marking particles; support means rotatable about an axis; a plurality of axially extending donor members located in said housing and operatively connected to said support means in a generally radially spaced parallel relationship with each other; an axially extending pivotable member having a blade-like structure at one end and a plurality of fingers at the other end being pivotally mounted to a wall of said housing, said pivotable member having about the same dimension in the axial direction as said donor members, said pivotable member being so positioned that said blade-like structure will engage said donor members when they move therepast and said fingers will engage a wall of said housing during a pivoting movement of said pivotable member; and means for rotating said support means for moving each of said donor members through said housing and into engagement with and past said blade-like structure.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |