US3974554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quadrangular trihelicoid gravure roll
Assignee: Xerox Corp
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Filing: 1975-05-16
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Granted: 1976-08-17
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Expires: 1995-05-16
Abstract
Abstract An article of manufacture for use in the fluid development of electrostatic images is disclosed. The article is characterized by a substantially cylindrical roll which has at least one volute groove partitioned into a plurality of cells for carrying a quantity of development fluid. The partitions prevent a doctor blade, applicable to the cylindrical roll from penetrating too deeply into the cells and thereby prevent substantial quantities of development fluid from being removed from the cells during doctoring.
Inventors
- 👤 Joseph Fantuzzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:00
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101; G03G15/102
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
An article of manufacture adapted for use in the fluid development of electrostatic images characterized by a substantially cylindrical roll having at least one volute groove and one convex, volute land extending parallel to said groove, and means intersecting said groove defining a plurality of cells for carrying a quantity of development fluid, said cells being located within said volute groove and further defined by concave partitions extending transversely to said land.
Claim 2
Dependent Claim
72 words
An article of manufacture adapted for use in the fluid development of electrostatic images characterized by a substantially cylindrical roll having at least one volute groove and one convex, volute land extending parallel to said groove, and means intersecting said groove defining a plurality of cells for carrying a quantity of development fluid, said cells being located within said volute groove and further defined by concave partitions extending transversely to said land.
Claim 3
Dependent Claim
29 words
The article of manufacture defined in claim 1 wherein said cells are of quadrangular cross-section, and are defined by concave partitions in said groove extending transversely to said land.
Claim 4
Dependent Claim
20 words
The article of manufacture defined in claim 2 wherein said cells are in the shape of an inverted, truncated pyramid.
Claim 5
Dependent Claim
19 words
The article of manufacture defined in claim 1 wherein said cylindrical roll is characterized by three parallel, volute grooves.
Claim 6
Dependent Claim
84 words
An article of manufacture adapted for use in the fluid development of electrostatic images characterized by a substantially cylindrical roll having three parallel, volute grooves and means defining a plurality of quadrangular cells within said volute grooves for carrying discrete quantities of development fluid; each turn of any of said volute grooves being separated from an adjacent turn by a convex, volute land extending parallel to said grooves; and each of said quadrangualr cells being defined by concave partitions extending transversely to said land.
Claim 7
Dependent Claim
84 words
An article of manufacture adapted for use in the fluid development of electrostatic images characterized by a substantially cylindrical roll having three parallel, volute grooves and means defining a plurality of quadrangular cells within said volute grooves for carrying discrete quantities of development fluid; each turn of any of said volute grooves being separated from an adjacent turn by a convex, volute land extending parallel to said grooves; and each of said quadrangualr cells being defined by concave partitions extending transversely to said land.
Claim 8
Dependent Claim
20 words
The article of manufacture defined in claim 5 wherein said cells are in the shape of an inverted, truncated pyramid.
Claim 9
Dependent Claim
79 words
An article of manufacture comprising a substantially clyindrical roll having at least one volute groove adapted to carry a quantity of development fluid; a volute land disposed between each of said grooves extending parallel thereto and adapted to be contacted by means for doctoring said land; means within said volute groove and extending substantially transversely to said volute groove, for preventing said doctoring means from removing substantial quantities of development fluid from said groove when said land is doctored.
Claim 10
Dependent Claim
79 words
An article of manufacture comprising a substantially clyindrical roll having at least one volute groove adapted to carry a quantity of development fluid; a volute land disposed between each of said grooves extending parallel thereto and adapted to be contacted by means for doctoring said land; means within said volute groove and extending substantially transversely to said volute groove, for preventing said doctoring means from removing substantial quantities of development fluid from said groove when said land is doctored.
Claim 11
Dependent Claim
37 words
The article of manufacture defined in claim 1 wherein said cylindrical roll is characterized by three parallel, volute grooves, and is further characterized by a volute land disposed between each of said grooves, and extending parallel thereto.
Claim 12
Dependent Claim
37 words
The article of manufacture defined in claim 7 wherein said means within said volute groove and extending substantially transversely to said volute groove comprise a plurality of partitions located below said lands defining a plurality of cells.
References Cited (Backward Citations)
US3276896A
Cited
US3424126A
Cited
US3472695A
Cited
US3667428A
Cited
US3696783A
Cited
US3712728A
Cited
US3830199A
Cited
US3762365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |