Patent US5099285A successfully refreshed from Google Patents.
US5099285A
Expired / Lapsed
US
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Development roller with surface layer of fluorosilicon polymer
Assignee: Ricoh Co Ltd
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Filing: 1990-06-13
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Granted: 1992-03-24
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Expires: 2010-06-13
Abstract
Abstract A development apparatus including a development roller for developing a latent electrostatic image formed on an electrophotographic photoconductor to a visible toner image by applying a non-magnetic one-component toner thereto, in which a surface layer of the development roller includes a fluorosilcone polymer including repeating units of formula (I): ##STR1##
Inventors
- 👤 Yasuo Hirano
- 👤 Jun Aoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:18
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0818; C; C08; C08K; C08K5/00; C08K5/36; C08K5/43
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
52 words
In a development apparatus comprising a development roller for developing a latent electrostatic image formed on an electrophotographic photoconductor to a visible toner image by applying a non-magnetic one-component toner thereto, the improvement wherein said development roller comprises a surface layer comprising a fluorosilicone polymer including repeating units of formula (I): ##STR13##
Claim 2
Dependent Claim
52 words
In a development apparatus comprising a development roller for developing a latent electrostatic image formed on an electrophotographic photoconductor to a visible toner image by applying a non-magnetic one-component toner thereto, the improvement wherein said development roller comprises a surface layer comprising a fluorosilicone polymer including repeating units of formula (I): ##STR13##
Claim 3
Dependent Claim
32 words
The development apparatus as claimed in claim 1, wherein said surface layer of said development roller further comprises a fluorine-containing surface active agent which comprises a fluorine compound including a fluoroalkyl group.
Claim 4
Dependent Claim
29 words
The development apparatus as claimed in claim 2, wherein said fluorine compound is a compound having formula: C.sub.n F.sub.2n+1 OH wherein n is an integer of 4 to 16.
Claim 5
Dependent Claim
40 words
The development apparatus as claimed in claim 2, wherein said fluorine compound is a compound having formula: ##STR14## wherein n is an integer of 4 to 16, and R 1 is an alkyl group having 1 to 5 carbon atoms.
Claim 6
Dependent Claim
40 words
The development apparatus as claimed in claim 2, wherein said fluorine compound is a compound having formula: ##STR15## wherein n is an integer of 4 to 16, and R 1 is an alkyl group having 1 to 5 carbon atoms.
Claim 7
Dependent Claim
34 words
The development apparatus as claimed in claim 2, wherein said fluorine-containing surface active agent is in an amount of 0.1 to 10 parts by weight to 100 parts by weight of said fluorosilicone polymer.
Claim 8
Dependent Claim
29 words
The development apparatus as claimed in claim 1, wherein said surface layer of said development roller further comprises a fluorine-containing surface active agent which comprises an alkylene-oxide-addition fluorine compound.
Claim 9
Dependent Claim
49 words
The development apparatus as claimed in claim 7, wherein said alkylene-oxide-addition fluorine compound is a compound having formula: ##STR16## wherein n is an integer of 4 to 16, m is an integer of 2 to 30, and R 1 is an alkylene group having 1 to 5 carbon atoms.
Claim 10
Dependent Claim
61 words
The development apparatus as claimed in claim 7, wherein said alkylene-oxide-addition fluorine compound is a compound having formula: ##STR17## wherein n is an integer of 4 to 16, m is an integer of 2 to 30, R 1 is an alkylene group having 1 to 5 carbon atoms, and R 2 is an alkyl group having 1 to 5 carbon atoms.
Claim 11
Dependent Claim
61 words
The development apparatus as claimed in claim 7, wherein said alkylene-oxide-addition fluorine compound is a compound having formula: ##STR18## wherein n is an integer of 4 to 16, m is an integer of 2 to 30, R 1 is an alkylene group having 1 to 5 carbon atoms, and R 2 is an alkyl group having 1 to 5 carbon atoms.
Claim 12
Dependent Claim
34 words
The development apparatus as claimed in claim 7, wherein said fluorine-containing surface active agent is in an amount of 0.1 to 10 parts by weight to 100 parts by weight of said fluorosilicone polymer.
Claim 13
Dependent Claim
40 words
The development apparatus as claimed in claim 1, wherein said surface layer of said development roller further comprises a silicone polymer in an amount of 10 parts by weight or less to 90 parts by weight of said fluorosilicone polymer.
Claim 14
Dependent Claim
29 words
The development apparatus as claimed in claim 12, wherein said silicone polymer is selected from the group consisting of dimethyl silicone polymer, methylvinyl silicone copolymer and phenyl silicone polymer.
Claim 15
Dependent Claim
41 words
A development roller for developing latent electrostatic images formed on an electrophotographic photoconductor, comprising a surface layer and a core member for supporting said surface layer thereon, said surface layer comprising a fluorosilicone polymer including repeating units of formula (I): ##STR19##
Claim 16
Dependent Claim
41 words
A development roller for developing latent electrostatic images formed on an electrophotographic photoconductor, comprising a surface layer and a core member for supporting said surface layer thereon, said surface layer comprising a fluorosilicone polymer including repeating units of formula (I): ##STR19##
Claim 17
Dependent Claim
28 words
The development roller as claimed in claim 14, wherein said surface layer further comprises a fluorine-containing surface active agent which comprises a fluorine compound including a fluoroalkyl group.
Claim 18
Dependent Claim
29 words
The development roller as claimed in claim 15, wherein said fluorine compound is a compound having formula: C.sub.n F.sub.2n+1 OH wherein n is an integer of 4 to 16.
Claim 19
Dependent Claim
40 words
The development roller as claimed in claim 15, wherein said fluorine compound is a compound having formula: ##STR20## wherein n is an integer of 4 to 16, and R 1 is an alkyl group having 1 to 5 carbon atoms.
Claim 20
Dependent Claim
40 words
The development roller as claimed in claim 15, wherein said fluorine compound is a compound having formula: ##STR21## wherein n is an integer of 4 to 16, and R 1 is an alkyl group having 1 to 5 carbon atoms.
Claim 21
Dependent Claim
34 words
The development roller as claimed in claim 15, wherein said fluorine-containing surface active agent is in an amount of 0.1 to 10 parts by weight to 100 parts by weight of said fluorosilicone polymer.
Claim 22
Dependent Claim
29 words
The development roller as claimed in claim 14, wherein said surface layer of said development roller further comprises a fluorine-containing surface active agent which comprises an alkylene-oxide-addition fluorine compound.
Claim 23
Dependent Claim
49 words
The development roller as claimed in claim 20, wherein said alkylene-oxide-addition fluorine compound is a compound having formula: ##STR22## wherein n is an integer of 4 to 16, m is an integer of 2 to 30, and R 1 is an alkylene group having 1 to 5 carbon atoms.
Claim 24
Dependent Claim
61 words
The development roller as claimed in claim 20, wherein said alkylene-oxide-addition fluorine compound is a compound having formula: ##STR23## wherein n is an integer of 4 to 16, m is an integer of 2 to 30, R 1 is an alkylene group having 1 to 5 carbon atoms, and R 2 is an alkyl group having 1 to 5 carbon atoms.
Claim 25
Dependent Claim
61 words
The development roller as claimed in claim 20, wherein said alkylene-oxide-addition fluorine compound is a compound having formula: ##STR24## wherein n is an integer of 4 to 16, m is an integer of 2 to 30, R 1 is an alkylene group having 1 to 5 carbon atoms, and R 2 is an alkyl group having 1 to 5 carbon atoms.
Claim 26
Dependent Claim
34 words
The development roller as claimed in claim 20, wherein said fluorine-containing surface active agent is in an amount of 0.1 to 10 parts by weight to 100 parts by weight of said fluorosilicone polymer.
Claim 27
Dependent Claim
40 words
The development roller as claimed in claim 14, wherein said surface layer of said development roller further comprises a silicone polymer in an amount of 10 parts by weight or less to 90 parts by weight of said fluorosilicone polymer.
Claim 28
Dependent Claim
29 words
The development roller as claimed in claim 25, wherein said silicone polymer is selected from the group consisting of dimethyl silicone polymer, methylvinyl silicone copolymer and phenyl silicone polymer.
Claim 29
Dependent Claim
18 words
The development roller as claimed in claim 14, further comprising an electroconductive elastic layer on said core member.
Claim 30
Dependent Claim
17 words
The development roller as claimed in claim 14, further comprising an outer layer on said surface layer.
Claim 31
Dependent Claim
17 words
The development roller as claimed in claim 27, further comprising an outer layer on said surface layer.
References Cited (Backward Citations)
US4637973A
Cited
US4827868A
Cited
US4958193A
Cited
US4910556A
Cited
JPH01293370A
Cited
JPH02105182A
Cited
JPH02108081A
Cited
JPH02110585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |