EP0533482A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Processes for preparing imaging members
Assignee: Xerox Corp
•
Filing: 1992-09-17
•
Granted: —
•
Expires: 2012-09-17
Abstract
Abstract Disclosed is a process for preparing a multilayered cylindrical article such as a drum or a seamless belt which comprises introducing into a cylindrical mold (1) a composition comprising a liquid, uncured resin material and a filler material of a density different from that of the uncured resin material, spinning the mold about its axis at a speed sufficient to cause separation of the uncured resin material and the filler material into discrete layers, and subsequently curing the uncured resin to form a cylindrical article having at least two layers (8,10), wherein the outermost layer comprises the material of higher density. Subsequent to formation, the multilayered cylindrical article can be coated with additional layers. Further, additional layers can be added to the inside surface of the cylinder by introducing the additional layer material into the mold and spin casting to form a layer. The cylindrical articles can be employed as imaging members in ionographic, electrophotographic, and similar imaging processes.
Inventors
- 👤 Douglas J. Weatherall
- 👤 Marion H. Quinlan
- 👤 Andrew O. Kenny
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:59
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0525; B; B29; B29C; B29C41/00; B29C41/02; B29C41/04; B29C41/042; B29C41/22; B29C70/00; B29C70/58; B29C70/64
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
46 words
A process for preparing a cylindrical article which comprises a. introducing into a cylindrical mold (1) a composition comprising a liquid, uncured resin material and a filler material; b. spinning the mold about its axis; and c. subsequently curing the resin to form the cylindrical article.
Claim 2
Dependent Claim
15 words
A process according to claim 1, wherein curing is effected by exposure to ultraviolet radiation.
Claim 3
Dependent Claim
12 words
A process according to claim 1, wherein curing is effected by heating.
Claim 4
Dependent Claim
15 words
A process according to claim 1, wherein curing is effected by activation of a catalyst.
Claim 5
Dependent Claim
53 words
A process according to any one of the preceding claims, wherein the filler material is a conductive material of a density similar to that of the uncured resin material, and in which the mold is spun at a speed that prevents separation of the uncured resin material and the filler material into layers.
Claim 6
Dependent Claim
66 words
A process according to any one of claims 1 to 4, wherein the filler material has a density different from that of the uncured resin material, and in which the mold is spun at a speed sufficient to cause separation of the uncured resin material and the filler material into layers whereby the curing step forms a cylindrical article having at least two layers (8, 10).
Claim 7
Dependent Claim
19 words
A process according to claim 6, wherein one of the materials is conductive and the other is a dielectric.
Claim 8
Dependent Claim
35 words
A process according to claim 6 or claim 7, wherein the density of the liquid uncured resin and the density of the filler material differ by from about 0.1 to about 0.4 gram per milliliter.
Claim 9
Dependent Claim
57 words
A process according to any one of claims 6 to 8, wherein an additional layer is formed on the cylindrical article by introducing an additional material into the mold subsequent to separation of the composition into layers, and spinning the mold to form a layer of the additional material on the inside surface of the cylindrical article.
Claim 10
Dependent Claim
24 words
A process according to claim 9, wherein the said resin is at least partially cured prior to introducing the additional material into the mold.
Claim 11
Dependent Claim
22 words
A process according to claim 9, wherein the said resin is cured subsequent to introduction of the additional material into the mold.
Claim 12
Dependent Claim
91 words
A process according to any one of claims 6 to 8, wherein an additional layer is formed on the cylindrical article by introducing an additional material into the mold prior to introduction of the said composition, spinning the mold about its axis to form a layer of the additional material on the mold surface, subsequently introducing the said composition into the mold and effecting the said separation of the composition into layers, thereby forming a cylindrical article having a layer of the additional material on the outer surface of the cylinder.
Claim 13
Dependent Claim
24 words
A process according to claim 12, wherein the additional material is at least partially cured prior to introducing the said composition into the mold.
Claim 14
Dependent Claim
22 words
A process according to claim 12, wherein the additional material is cured subsequent to introduction of the said composition into the mold.
Claim 15
Dependent Claim
31 words
A process according to any one of claims 1 to 8, wherein an additional layer is added to the cylindrical article subsequent to removal of the cylindrical article from the mold.
Claim 16
Dependent Claim
19 words
A process according to any one of claims 9 to 15, wherein the additional layer is a photogenerating material.
References Cited (Backward Citations)
US4394340A
Cited
JPS60166425A
Cited
JPS60170862A
Cited
JPS6184214A
Cited
JPS6195361A
Cited
GB2166370A
Cited
JPS61203460A
Cited
JPS6221722A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.