US4866480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing apparatus using one-component non-magnetic toner
Assignee: Toshiba Tec Corp
•
Filing: 1986-03-26
•
Granted: 1989-09-12
•
Expires: 2006-03-26
Abstract
Abstract A developing apparatus is disclosed that employs one-component non-magnetic toner. The apparatus includes a movable developing agent carrier that has a surface polished to a first finish, roughened to a second finish, and then metal plated. The agent carried carries a one-component developing agent composed of non-magnetic toner and supplies the developing agent to an electrostatic latent image. An elastic coating member is disposed to press on the surface of the movable developing agent carrier so that the free end thereof is directed opposite to the moving direction of the movable developing agent carrier, and a toner stirring member disposed in a toner container contiguously to or in sliding contact with the movable developing agent carrier. The apparatus provides a uniform toner layer over a long period of time and supplies stable and high quality images.
Inventors
- 👤 Masahiro Hosoya
- 👤 Shigeru Fujiwara
- 👤 Tsutomu Uehara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:06
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0812; G03G15/0808; G03G2215/00; G03G2215/06; G03G2215/0602; G03G2215/0604; G03G2215/0614; G03G2215/0634; G03G2215/0636
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
146 words
A developing apparatus for developing a latent image formed on an image carrier by a cone-component developing agent composed of a non-magnetic toner, said developing apparatus comprising: a nonmagnetized movable developing agent carrier for carrying and for supplying said one-component developing agent to an image transfer member; and an elastic coating member having a thickness in the range of about 0.1 to 0.4 mm formed of an elastic plate disposed to press on the surface of said movable developing agent carrier and supported in place at one end thereof, wherein said elastic coating member is disposed so that the free end thereof is directed opposite the direction of the movement of said movable developing agent carrier, and said elastic coating member is disposed so that the lateral surface of said elastic coating member except for a terminal part thereof will contact said movable developing agent carrier.
Claim 2
Dependent Claim
146 words
A developing apparatus for developing a latent image formed on an image carrier by a cone-component developing agent composed of a non-magnetic toner, said developing apparatus comprising: a nonmagnetized movable developing agent carrier for carrying and for supplying said one-component developing agent to an image transfer member; and an elastic coating member having a thickness in the range of about 0.1 to 0.4 mm formed of an elastic plate disposed to press on the surface of said movable developing agent carrier and supported in place at one end thereof, wherein said elastic coating member is disposed so that the free end thereof is directed opposite the direction of the movement of said movable developing agent carrier, and said elastic coating member is disposed so that the lateral surface of said elastic coating member except for a terminal part thereof will contact said movable developing agent carrier.
Claim 3
Dependent Claim
45 words
A developing apparatus according to claim 1, wherein the distance from the position of contact between said elastic coating member and said movable developing agent carrier to the free end of said elastic coating member is in the range of 1 mm to 5 mm.
Claim 4
Dependent Claim
35 words
A developing apparatus according to claim 1, wherein the surface of said movable developing agent carrier is a rough surface having average roughness in the range of about 0.3 μm Rz to 5.0 μm Rz.
Claim 5
Dependent Claim
35 words
A developing apparatus according to claim 1, wherein said elastic coating member is disposed against said movable developing agent carrier with a force of pressure in the range of about 10 g/cm to 100 g/cm.
Claim 6
Dependent Claim
49 words
A developing apparatus according to claim 1, wherein said elastic coating member is adapted to apply said one-component developing agent composed of a non-magnetic tone in a thickness of not less than 10 μm and not more than 80 μm on the surface of said movable developing agent carrier.
Claim 7
Dependent Claim
37 words
A developing apparatus according to claim 1 wherein an absolute value of electric charge imparted to said one-component developing agent composed of a non-magnetic toner is not less than 2 μC/g and not more than 20 μC/g.
Claim 8
Dependent Claim
146 words
A developing apparatus for developing a latent image formed on an image carrier by a one-component developing agent composed of a non-magnetic tone, said developing apparatus comprising: a non-magnetized movable developing agent carrier for carrying and for supplying said one-component developing agent to an image transfer member; and an elastic coating member having a thickness in the range of 0.1 to 0.4 mm formed of an elastic plate disposed to press on the surface of said movable developing agent carrier and supported in place at one end thereof, wherein said elastic coating member is disposed so that the free end thereof is directed opposite the direction of movement of said movable developing agent carrier, and the surface of said movable developing agent carrier has undergone the treatment of polishing to a first finish, roughening to a second finish, and electroless nickel plating in the order mentioned.
Claim 9
Dependent Claim
146 words
A developing apparatus for developing a latent image formed on an image carrier by a one-component developing agent composed of a non-magnetic tone, said developing apparatus comprising: a non-magnetized movable developing agent carrier for carrying and for supplying said one-component developing agent to an image transfer member; and an elastic coating member having a thickness in the range of 0.1 to 0.4 mm formed of an elastic plate disposed to press on the surface of said movable developing agent carrier and supported in place at one end thereof, wherein said elastic coating member is disposed so that the free end thereof is directed opposite the direction of movement of said movable developing agent carrier, and the surface of said movable developing agent carrier has undergone the treatment of polishing to a first finish, roughening to a second finish, and electroless nickel plating in the order mentioned.
Claim 10
Dependent Claim
23 words
A developing apparatus according to claim 7, wherein said electroless nickel plating has a thickness in the range of 5 to 20 μm.
Claim 11
Dependent Claim
37 words
A developing apparatus according to claim 9, wherein said movable developing agent carrier which has undergone the treatments of polishing, roughening electroless nickel plating has a surface roughness in the range of 0.3 to 5.0 μm (Rz).
Claim 12
Dependent Claim
151 words
A developing apparatus for developing a latent image formed on an image carrier using a one-component non-magnetic toner, said developing apparatus comprising: a non-magnetized movable developing agent carrier for carrying and for supplying said one-component developing agent to an electrostatic latent image and an elastic coating member formed of an elastic plate having a thickness in the range of about 0.1 to 0.4 mm disposed to press on the surface of said movable developing agent carrier and supported in place at one end thereof, wherein said elastic coating member is disposed so that the free end thereof is directed opposite the direction of movement of said movable developing agent carrier and said developing agent container is provided therein with a toner stirring member disposed contiguously to or in sliding contact with said movable developing agent carrier and for making the toner uniform on the surface of said movable developing agent carrier.
Claim 13
Dependent Claim
151 words
A developing apparatus for developing a latent image formed on an image carrier using a one-component non-magnetic toner, said developing apparatus comprising: a non-magnetized movable developing agent carrier for carrying and for supplying said one-component developing agent to an electrostatic latent image and an elastic coating member formed of an elastic plate having a thickness in the range of about 0.1 to 0.4 mm disposed to press on the surface of said movable developing agent carrier and supported in place at one end thereof, wherein said elastic coating member is disposed so that the free end thereof is directed opposite the direction of movement of said movable developing agent carrier and said developing agent container is provided therein with a toner stirring member disposed contiguously to or in sliding contact with said movable developing agent carrier and for making the toner uniform on the surface of said movable developing agent carrier.
Claim 14
Dependent Claim
34 words
A developing apparatus according to claim 10, wherein said toner stirring member comprises an elastic roller adapted to be kept in contact with the surface of said developing roller as said elastic roller revolves.
Claim 15
Dependent Claim
20 words
A developing apparatus according to claim 10, wherein said toner stirring member comprises an elastic roller made of polyurethane foam.
Claim 16
Dependent Claim
33 words
A developing apparatus according to claim 10, wherein said toner stirring member comprises an elastic roller made of polyurethane foam and said elastic roller is provided on the surface thereof with helical grooves.
References Cited (Backward Citations)
US2518645A
Cited
US3572288A
Cited
US3651758A
Cited
US3863603A
Cited
US3974554A
Cited
US4136637A
Cited
US4194830A
Cited
US4200389A
Cited
US4217769A
Cited
US4377332A
Cited
US4378158A
Cited
US4325627A
Cited
US4395110A
Cited
US4368971A
Cited
US4380966A
Cited
JPS5766455A
Cited
JPS5786869A
Cited
US4521098A
Cited
EP0071466A2
Cited
US4516850A
Cited
US4419959A
Cited
US4624545A
Cited
US4575220A
Cited
US4616918A
Cited
US4656965A
Cited
US4558943A
Cited
US4528937A
Cited
GB2163371A
Cited
US4696255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |