Patent US4780741A successfully refreshed from Google Patents.
US4780741A
Expired / Lapsed
US
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Method and apparatus for forming toner layer
Assignee: Kyocera Corp
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Filing: 1986-02-11
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Granted: 1988-10-25
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Expires: 2006-02-11
Abstract
Abstract The invention relates to a method and apparatus for forming a toner layer adapted for electrophotographic developing apparatuses for developing using magnetic toner. Toner carried on a toner carrier and flowing toward the developing position is regulated in thickness by a toner layer thickness regulating member contacting the surface of the toner carrier. Lines of magnetic force are applied to the toner layer having a regulated thickness so as to stir the toner conveyed toward the developing position, thereby forming a uniform toner layer at the downstream side. The toner layer thickness regulating member can be a thin plate member of a nonmagnetic material having elasticity, or a rigid blade having a pivotal proximal end. The toner is stirred in a repulsive magnetic field forming region formed between a magnetic blade and the toner carrier.
Inventors
- 👤 Takasumi Wada
- 👤 Susumu Shoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:42
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0818; G03G15/0812; G03G15/09; G03G15/0914; G03G15/0921; G03G15/0928; G03G2215/00; G03G2215/06; G03G2215/0602; G03G2215/0604; G03G2215/0614; G03G2215/0634; G03G2215/0636; G03G2215/0641
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
An apparatus for forming a toner layer comprising toner carrier means for carrying toner and toner layer thickness regulating means comprising a nonmagnetic thin plate which contacts the toner carrier means through the toner layer, wherein a plurality of grooves are formed at both sides of said nonmagnetic thin plate in a surface of said toner carrier means contacting said nonmagnetic thin plate, so as to extend linearly in a direction inclined at predetermined angles with respect to a moving direction of said toner carrier means, and said grooves are formed in a lattice-like manner so as to intersect with each other, wherein said grooves have a depth which is 1/4 to 3 times an average toner particle diameter, and a pitch of adjacent grooves is 1 to 5 times a width of said grooves.
Claim 2
Independent Claim
135 words
An apparatus for forming a toner layer comprising toner carrier means for carrying toner and toner layer thickness regulating means comprising a nonmagnetic thin plate which contacts the toner carrier means through the toner layer, wherein a plurality of grooves are formed at both sides of said nonmagnetic thin plate in a surface of said toner carrier means contacting said nonmagnetic thin plate, so as to extend linearly in a direction inclined at predetermined angles with respect to a moving direction of said toner carrier means, and said grooves are formed in a lattice-like manner so as to intersect with each other, wherein said grooves have a depth which is 1/4 to 3 times an average toner particle diameter, and a pitch of adjacent grooves is 1 to 5 times a width of said grooves.
Claim 3
Independent Claim
113 words
An apparatus for forming a toner layer comprising toner carrier means for carrying toner and toner layer thickness regulating means comprising a nonmagnetic thin plate which contacts the toner carrier means through the toner layer, wherein a plurality of grooves are formed at both sides of said nonmagnetic thin plate in a surface of said toner carrier means contacting said nonmagnetic thin plate, so as to extend linearly in a direction inclined at predetermined angles with respect to a moving direction of said toner carrier means, and said grooves are formed in a lattice-like manner so as to intersect with each other, wherein said grooves intersect at an angle of 30° to 150°.
Claim 4
Independent Claim
113 words
An apparatus for forming a toner layer comprising toner carrier means for carrying toner and toner layer thickness regulating means comprising a nonmagnetic thin plate which contacts the toner carrier means through the toner layer, wherein a plurality of grooves are formed at both sides of said nonmagnetic thin plate in a surface of said toner carrier means contacting said nonmagnetic thin plate, so as to extend linearly in a direction inclined at predetermined angles with respect to a moving direction of said toner carrier means, and said grooves are formed in a lattice-like manner so as to intersect with each other, wherein said grooves intersect at an angle of 30° to 150°.
Claim 5
Independent Claim
149 words
An apparatus for forming a toner layer comprising toner carrier means for carrying toner and toner layer thickness regulating means comprising a nonmagnetic thin plate which contacts the toner carrier means through the toner layer, wherein a plurality of grooves are formed at both sides of said nonmagnetic thin plate in a surface of said toner carrier means contacting said nonmagnetic thin plate, so as to be extended linearly in a direction inclined at predetermined angles with respect to a moving direction of said toner carrier means, and said grooves are formed in a lattice-like manner so as to intersect with each other, wherein said grooves have a depth which is 1/4 to 3 times an average toner particle diameter, and a pitch of adjacent grooves is 1 to 5 times a width of said grooves, and further wherein said grooves intersect at an angle of 30° to 150°.
Claim 6
Independent Claim
149 words
An apparatus for forming a toner layer comprising toner carrier means for carrying toner and toner layer thickness regulating means comprising a nonmagnetic thin plate which contacts the toner carrier means through the toner layer, wherein a plurality of grooves are formed at both sides of said nonmagnetic thin plate in a surface of said toner carrier means contacting said nonmagnetic thin plate, so as to be extended linearly in a direction inclined at predetermined angles with respect to a moving direction of said toner carrier means, and said grooves are formed in a lattice-like manner so as to intersect with each other, wherein said grooves have a depth which is 1/4 to 3 times an average toner particle diameter, and a pitch of adjacent grooves is 1 to 5 times a width of said grooves, and further wherein said grooves intersect at an angle of 30° to 150°.
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |