US4746589A
Expired / Lapsed
US
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Developing method in electrophotography using oscillating electric field
Assignee: Konica Minolta Inc
•
Filing: 1987-07-31
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Granted: 1988-05-24
•
Expires: 2007-07-31
Abstract
Abstract A developing method wherein a developer layer formed on a developer feeding carrier is conveyed, into an oscillating electric field, and an electrostatic latent image on an image retainer is developed by the developer of the developer layer inside the oscillating electric field. The developer has carrier particles and toner particles and the average particle size of the carrier particles is from 5 to 50 μm. The average particle size of the toner particles is up to 20 μm. The carrier particle and the toner particle are sphered.
Inventors
- 👤 Satoshi Haneda
- 👤 Seiichiro Hiratsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:09
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0907
Claims Analysis
Total Claims: 63
Claim 1
Independent Claim
101 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the average particle size of the carrier particles being from 5 to 50 μm, the average particle size of the toner particles being up to 20 μm, and the thickness of said developer layer being higher than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on the image retainer by the developer inside the oscillating electric field.
Claim 2
Dependent Claim
101 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the average particle size of the carrier particles being from 5 to 50 μm, the average particle size of the toner particles being up to 20 μm, and the thickness of said developer layer being higher than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on the image retainer by the developer inside the oscillating electric field.
Claim 3
Dependent Claim
13 words
A developing method according to claim 1, wherein the carrier particles is sphered.
Claim 4
Dependent Claim
13 words
A developing method according to claim 1 wherein the toner particle is sphered.
Claim 5
Dependent Claim
18 words
A developing method according to claim 1 wherein the carrier particles comprise magnetic particles and a thermoplastic resin.
Claim 6
Dependent Claim
16 words
A developing method according to claim 1 wherein the toner particle is a toner for pressure-fixing.
Claim 7
Dependent Claim
17 words
A developing method according to claim 1 wherein the developer feeding carrier has a rotary magnet therein.
Claim 8
Dependent Claim
19 words
A developing method according to claim 1 wherein the frequency of the oscillating electric field is 100 Hz-10 KHz.
Claim 9
Dependent Claim
20 words
A developing method according to claim 1 wherein the frequency of the oscillating electric field is preferably 1 KHz-5 KHz.
Claim 10
Dependent Claim
13 words
A developing method according to claim 1 wherein the toner particle is magnetic.
Claim 11
Dependent Claim
13 words
A developing method according to claim 1 wherein the toner particle is non-magnetic.
Claim 12
Dependent Claim
13 words
A developing method according to claim 1 wherein the carrier particle is magnetic.
Claim 13
Dependent Claim
79 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the carrier particles being sphered, and the thickness of said developer layer being higher than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on an image retainer by the developer inside the oscillating electric field.
Claim 14
Dependent Claim
79 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the carrier particles being sphered, and the thickness of said developer layer being higher than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on an image retainer by the developer inside the oscillating electric field.
Claim 15
Dependent Claim
15 words
A developing method according to claim 1 wherein the developer feeding carrier has stationary magnets.
Claim 16
Dependent Claim
13 words
A developing method according to claim 12 wherein the toner particle is sphered.
Claim 17
Dependent Claim
18 words
A developing method according to claim 12 wherein the carrier particles comprise magnetic particles and a thermoplastic resin.
Claim 18
Dependent Claim
16 words
A developing method according to claim 12 wherein the toner particle is a toner for pressure-fixing.
Claim 19
Dependent Claim
17 words
A developing method according to claim 12 wherein the developer feeding carrier has a rotary magnet therein.
Claim 20
Dependent Claim
19 words
A developing method according to claim 12 wherein the frequency of the oscillating electric field is 100 Hz-10 KHz.
Claim 21
Dependent Claim
13 words
A developing method according to claim 12 wherein the toner particle is magnetic.
Claim 22
Dependent Claim
13 words
A developing method according to claim 12 wherein the toner particle is non-magnetic.
Claim 23
Dependent Claim
13 words
A developing method according to claim 12 wherein the carrier particle is magnetic.
Claim 24
Dependent Claim
15 words
A developing method according to claim 12 wherein the developer feeding carrier has stationary magnets.
Claim 25
Dependent Claim
20 words
A developing method according to claim 18 wherein the frequency of the oscillating electric field is preferably 1 KHz-5 KHz.
Claim 26
Dependent Claim
86 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the carrier particles comprising resin and magnetic particles dispersed in the resin, and the thickness of said developer layer being higher than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on the image retainer by the developer inside the oscillating electric field.
Claim 27
Dependent Claim
86 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the carrier particles comprising resin and magnetic particles dispersed in the resin, and the thickness of said developer layer being higher than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on the image retainer by the developer inside the oscillating electric field.
Claim 28
Dependent Claim
13 words
A developing method according to claim 24 wherein the carrier particles are sphered.
Claim 29
Dependent Claim
13 words
A developing method according to claim 24 wherein the toner particle is sphered.
Claim 30
Dependent Claim
16 words
A developing method according to claim 24 wherein the toner particle is a toner for pressure-fixing.
Claim 31
Dependent Claim
17 words
A developing method according to claim 24 wherein the developer feeding carrier has a rotary magnet therein.
Claim 32
Dependent Claim
19 words
A developing method according to claim 24 wherein the frequency of the oscillating electric field is 100 Hz-10 KHz.
Claim 33
Dependent Claim
13 words
A developing method according to claim 24 wherein the toner particle is magnetic.
Claim 34
Dependent Claim
13 words
A developing method according to claim 24 wherein the toner particle is non-magnetic.
Claim 35
Dependent Claim
15 words
A developing method according to claim 24 wherein the developer feeding carrier has stationary magnets.
Claim 36
Dependent Claim
36 words
A developing method according to claim 24 wherein the average particle size of the carrier particles is from 5 to 50 μm and the average particle size of the toner particles is up to 20 μm.
Claim 37
Dependent Claim
27 words
A developing method according to claim 24 wherein the carrier particle consists essentially of magnetic particles and insulating material of more than 10 8 Ohm-cm electric resistivity.
Claim 38
Dependent Claim
20 words
A developing method according to claim 29 wherein the frequency of the oscillating electric field is preferably 1 KHz-5 KHz.
Claim 39
Dependent Claim
79 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the carrier particles being sphered, and the thickness of said developer layer being smaller than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on the image retainer by the developer inside the oscillating electric field.
Claim 40
Dependent Claim
79 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the carrier particles being sphered, and the thickness of said developer layer being smaller than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on the image retainer by the developer inside the oscillating electric field.
Claim 41
Dependent Claim
13 words
A developing method according to claim 36 wherein the toner particle is sphered.
Claim 42
Dependent Claim
16 words
A developing method according to claim 36 wherein the toner particle is a toner for pressure-fixing.
Claim 43
Dependent Claim
17 words
A developing method acording to claim 36 wherein the developer feeding carrier has a rotary magnet therein.
Claim 44
Dependent Claim
19 words
A developing method according to claim 36 wherein the frequency of the oscillating electric field is 100 Hz-10 KHz.
Claim 45
Dependent Claim
13 words
A developing method according to claim 36 wherein the toner particle is magnetic.
Claim 46
Dependent Claim
13 words
A developing method according to claim 36 wherein the toner particle is non-magnetic.
Claim 47
Dependent Claim
15 words
A developing method according to claim 36 wherein the developer feeding carrier has stationary magnets.
Claim 48
Dependent Claim
27 words
A developing method according to claim 36 wherein the carrier particle consists essentially of magnetic particles and insulating material of more than 10 8 Ohm-cm electric resistivity.
Claim 49
Dependent Claim
17 words
A developing method according to claim 36 wherein the carrier particle is coated with an insulating resin.
Claim 50
Dependent Claim
20 words
A developing method according to claim 40 wherein the frequency of the oscillating electric field is preferably 1 KHz-5 KHz.
Claim 51
Dependent Claim
82 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the carrier particles being dispersed in a resin, and the thickness of said developer layer being smaller than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on the image retainer by the developer inside the oscillating electric field.
Claim 52
Dependent Claim
82 words
A developing method comprising the steps of supplying a developer having magnetic carrier particles and toner particles on a developer feeding carrier to form a developer layer, the carrier particles being dispersed in a resin, and the thickness of said developer layer being smaller than the distance between the developer feeding carrier and an image retainer, conveying the developer layer into an oscillating electric field, and developing a latent image on the image retainer by the developer inside the oscillating electric field.
Claim 53
Dependent Claim
13 words
A developing method according to claim 47 wherein the carrier particles are sphered.
Claim 54
Dependent Claim
13 words
A developing method according to claim 47 wherein the toner particle is sphered.
Claim 55
Dependent Claim
16 words
A developing method according to claim 47 wherein the toner particle is a toner for pressure-fixing.
Claim 56
Dependent Claim
17 words
A developing method according to claim 47 wherein the developer feeding carrier has a rotary magnet therein.
Claim 57
Dependent Claim
19 words
A developing method according to claim 47 wherein the frequency of the oscillating electric field is 100 Hz-10 KHz.
Claim 58
Dependent Claim
13 words
A developing method according to claim 47 wherein the toner particle is magnetic.
Claim 59
Dependent Claim
13 words
A developing method according to claim 47 wherein the toner particle is non-magnetic.
Claim 60
Dependent Claim
15 words
A developing method according to claim 47 wherein the developer feeding carrier has stationary magnets.
Claim 61
Dependent Claim
36 words
A developing method according to claim 47 wherein the average particle size of the carrier particles is from 5 to 50 μm and the average particle size of the toner particles is up to 20 μm.
Claim 62
Dependent Claim
27 words
A developing method according to claim 47 wherein the carrier particle consists essentially of magnetic particles and insulating material of more than 10 8 Ohm-cm electric resistivity.
Claim 63
Dependent Claim
20 words
A developing method according to claim 52 wherein the frequency of the oscillating electric field is preferably 1 KHz-5 KHz.
References Cited (Backward Citations)
US4557992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |