Patent US1974448A successfully refreshed from Google Patents.
Patent US3696785A successfully refreshed from Google Patents.
US3696785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development apparatus
Assignee: Xerox Corp
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Filing: 1970-12-18
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Granted: 1972-10-10
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Expires: 1990-12-18
Abstract
Abstract Xerographic development apparatus employing a donor member adapted to retain toner on its periphery and a number of processing stations arranged around its periphery, including a loading station having means to load toner on the peripheral surface of the donor member, and a toner layer preparation station having means to prepare the toner layer on the donor member prior to presentation of the toner layer to the imaged region of a photoconductor.
Inventors
- 👤 Paul G Andrus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:44
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0818; G03G15/0812
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
143 words
In an apparatus for developing an electrostatic latent image formed on the surface of a xerographic plate, means for developing said latent image, said developing means including in combination: a. a donor member capable of retaining toner particles along a transportable surface thereof, b. means to continuously advance said donor member past a plurality of treating stations, said treating stations comprising: 1. a toner loading station including a supply of toner particles, at which toner particles are contacted and retained by said donor member; 2. a clean-up station having a clean-up member operative to convert said toner particles retained on said donor member to a toner layer of uniform thickness and to remove toner agglomerates therefrom; and 2 a developing station at which the agglomerate-free toner layer of uniform thickness is presented in developing relation to said latent image on said xerographic plate.
Claim 2
Dependent Claim
143 words
In an apparatus for developing an electrostatic latent image formed on the surface of a xerographic plate, means for developing said latent image, said developing means including in combination: a. a donor member capable of retaining toner particles along a transportable surface thereof, b. means to continuously advance said donor member past a plurality of treating stations, said treating stations comprising: 1. a toner loading station including a supply of toner particles, at which toner particles are contacted and retained by said donor member; 2. a clean-up station having a clean-up member operative to convert said toner particles retained on said donor member to a toner layer of uniform thickness and to remove toner agglomerates therefrom; and 2 a developing station at which the agglomerate-free toner layer of uniform thickness is presented in developing relation to said latent image on said xerographic plate.
Claim 3
Dependent Claim
58 words
a clean-up station having a clean-up member operative to convert said toner particles retained on said donor member to a toner layer of uniform thickness and to remove toner agglomerates therefrom; and 2 a developing station at which the agglomerate-free toner layer of uniform thickness is presented in developing relation to said latent image on said xerographic plate.
Claim 4
Dependent Claim
58 words
a clean-up station having a clean-up member operative to convert said toner particles retained on said donor member to a toner layer of uniform thickness and to remove toner agglomerates therefrom; and 2 a developing station at which the agglomerate-free toner layer of uniform thickness is presented in developing relation to said latent image on said xerographic plate.
Claim 5
Dependent Claim
62 words
In an apparatus for developing an electrostatic latent image formed on the surface of a xerographic plate, means for developing said latent image, said means including a. an endless donor member capable of retaining a layer of toner particles along a transportable surface thereof; b. means to continuously advance said donor member past a plurality of treating stations, said treating stations comprising:
Claim 6
Dependent Claim
62 words
In an apparatus for developing an electrostatic latent image formed on the surface of a xerographic plate, means for developing said latent image, said means including a. an endless donor member capable of retaining a layer of toner particles along a transportable surface thereof; b. means to continuously advance said donor member past a plurality of treating stations, said treating stations comprising:
Claim 7
Dependent Claim
55 words
a clean-up station having a rotatable, cylindrical clean-up member located adjacent said donor member so as to contact the outermost region of said layer of toner particles, said clean-up member being so constructed and designed to convert the layer of retained toner particles to one of comparatively uniform thickness and remove toner agglomerates therefrom; and
Claim 8
Dependent Claim
55 words
a clean-up station having a rotatable, cylindrical clean-up member located adjacent said donor member so as to contact the outermost region of said layer of toner particles, said clean-up member being so constructed and designed to convert the layer of retained toner particles to one of comparatively uniform thickness and remove toner agglomerates therefrom; and
Claim 9
Dependent Claim
86 words
a clean-up station having a rotatable, cylindrical clean-up member located adjacent said donor member so as to contact the outermost region of said layer of toner particles, said clean-up member being so constructed and designed to convert the layer of retained toner particles to one of comparatively uniform thickness and remove toner agglomerates therefrom wherein said clean-up member is an electrically biased, comparatively smooth-surfaced cylindrical member and is adapted to rotate at a rate substantially equal to the rate of transport of the toner layer; and
Claim 10
Dependent Claim
86 words
a clean-up station having a rotatable, cylindrical clean-up member located adjacent said donor member so as to contact the outermost region of said layer of toner particles, said clean-up member being so constructed and designed to convert the layer of retained toner particles to one of comparatively uniform thickness and remove toner agglomerates therefrom wherein said clean-up member is an electrically biased, comparatively smooth-surfaced cylindrical member and is adapted to rotate at a rate substantially equal to the rate of transport of the toner layer; and
Claim 11
Dependent Claim
25 words
a developing station at which the agglomerate-free toner layer of uniform thickness is presented in developing relation to said latent image on said xerographic plate.
Claim 12
Dependent Claim
25 words
a developing station at which the agglomerate-free toner layer of uniform thickness is presented in developing relation to said latent image on said xerographic plate.
Claim 13
Dependent Claim
25 words
a developing station at which the agglomerate-free toner layer of uniform thickness is presented in developing relation to said latent image on said xerographic plate.
Claim 14
Dependent Claim
25 words
a developing station at which the agglomerate-free toner layer of uniform thickness is presented in developing relation to said latent image on said xerographic plate.
Claim 15
Dependent Claim
41 words
The apparatus of claim 2 wherein said clean-up member has micro-appendages on the curved surface thereof and said clean-up member is adapted to rotate at a rate in excess of the rate of transport of the surface of said donor member.
Claim 16
Dependent Claim
16 words
The apparatus of claim 3 wherein said clean-up member is adapted to operate at ground potential.
Claim 17
Dependent Claim
29 words
The apparatus of claim 3 wherein said clean-up member is adapted to rotate in a direction counter to the direction of transport of the surface of said donor member.
Claim 18
Dependent Claim
47 words
The apparatus of claim 3 wherein a charging station is located between said toner loading station and said clean-up station and is adapted to place a uniform charge on said toner particles retained by said donor member of a polarity opposite to that of said latent image.
Claim 19
Dependent Claim
35 words
The apparatus of claim 3 wherein said donor member is located adjacent said xerographic plate so that said agglomerate-free toner layer of uniform thickness is presentable in closely spaced developing relation to said latent image.
Claim 20
Dependent Claim
32 words
The apparatus of claim 3 having a cleaning means located between said developing station and said toner loading station and adapted to remove at least the outermost region of said toner layer.
Claim 21
Dependent Claim
62 words
In an apparatus for developing an electrostatic latent image formed on the surface of a xerographic plate, means for developing said latent image, said means including a. an endless donor member capable of retaining a layer of toner particles along a transpoRtable surface thereof; b. means to continuously advance said donor member past a plurality of treating stations, said treating stations comprising:
Claim 22
Dependent Claim
62 words
In an apparatus for developing an electrostatic latent image formed on the surface of a xerographic plate, means for developing said latent image, said means including a. an endless donor member capable of retaining a layer of toner particles along a transpoRtable surface thereof; b. means to continuously advance said donor member past a plurality of treating stations, said treating stations comprising:
Claim 23
Dependent Claim
26 words
The apparatus of claim 9 wherein said clean-up member is adapted to rotate in a direction counter to the direction of transport of the toner layer.
Claim 24
Dependent Claim
28 words
The apparatus of claim 10 having a toner removal means in association with said clean-up member adapted to remove toner particles from the surface of said clean-up member.
Claim 25
Dependent Claim
47 words
The apparatus of claim 9 wherein a charging station is located between said toner loading station and said clean-up station and is adapted to place a uniform charge on said toner particles retained by said donor member of a polarity opposite to that of said latent image.
Claim 26
Dependent Claim
35 words
The apparatus of claim 9 wherein said donor member is located adjacent said xerographic plate so that said agglomerate-free toner layer of uniform thickness is presentable in closely spaced developing relation to said latent image.
Claim 27
Dependent Claim
32 words
The apparatus of claim 9 having a cleaning means located between said developing station and said toner loading station and adapted to remove at least the outermost region of said toner layer.
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |