US5824445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing image and two-component developer
Assignee: Kyocera Corp
•
Filing: 1997-05-12
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Granted: 1998-10-20
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Expires: 2017-05-12
Abstract
Abstract A process for producing an image comprising the steps of: electrically charging a photoreceptor under dark; forming a latent image on the photoreceptor through selective imagewise exposure to light; and developing the latent image with a two-component developer comprising a carrier and a toner, the photoreceptor comprising a conductive substrate having thereon a photoconductive layer comprising amorphous silicon having a thickness of 25 μm or less, the carrier is a magnetic material carrier comprising particles of a magnetic material having an average particle diameter of from 35 to 60 μm, where the content of particles having a diameter of 44 μm or more is 35% by weight or more. A two-component developer comprising a carrier and a toner, the carrier comprising particles of a magnetic material having an average particle diameter of from 35 to 60 μm, where the content of particles having a diameter of 44 μm or more is 35% by weight or more.
Inventors
- 👤 Eiji Ochiai
- 👤 Makoto Hamaguchi
- 👤 Hiroyoshi Tode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:20
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08221; G03G9/00; G03G9/08; G03G9/10; G03G9/107; G03G9/108; G03G9/1088; G03G9/113
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
138 words
A process for producing an image comprising the steps of: electrically charging a photoreceptor under dark; forming a latent image on said photoreceptor through selective imagewise exposure to light; and developing said latent image with a two-component developer comprising a carrier and a toner, said photoreceptor comprising a conductive substrate having thereon a photoconductive layer comprising amorphous silicon having a thickness of 25 μm or less, wherein said carrier is a composite carrier comprising a mixture of (a) a magnetic material carrier comprising particles of a magnetic material having an average particle diameter of from 35 to 60 μm, where the content of particles having a diameter of 44 μm or more is 35% by weight or more, and (b) a magnetic resin carrier comprising particles of a binder resin dispersed therein fine particles of a magnetic material.
Claim 2
Dependent Claim
138 words
A process for producing an image comprising the steps of: electrically charging a photoreceptor under dark; forming a latent image on said photoreceptor through selective imagewise exposure to light; and developing said latent image with a two-component developer comprising a carrier and a toner, said photoreceptor comprising a conductive substrate having thereon a photoconductive layer comprising amorphous silicon having a thickness of 25 μm or less, wherein said carrier is a composite carrier comprising a mixture of (a) a magnetic material carrier comprising particles of a magnetic material having an average particle diameter of from 35 to 60 μm, where the content of particles having a diameter of 44 μm or more is 35% by weight or more, and (b) a magnetic resin carrier comprising particles of a binder resin dispersed therein fine particles of a magnetic material.
Claim 3
Dependent Claim
82 words
A process for producing an image as claimed in claim 1, wherein said carrier is a composite carrier comprising a mixture of (a) a magnetic material carrier comprising particles of a magnetic material having an average particle diameter of from 35 to 55 μm, the content of particles having a diameter of 44 μm or more being 35% by weight or more, and (b) a magnetic resin carrier comprising particles of a binder resin dispersed therein fine particles of a magnetic material.
Claim 4
Dependent Claim
29 words
A process for producing an image as claimed in claim 2, wherein said toner is an abrasive toner comprising abrasive fine particles fixed on the surface of toner particles.
Claim 5
Dependent Claim
24 words
A process for producing an image as claimed in claim 2, wherein said photoreceptor is electrically charged under dark to 400 V or less.
Claim 6
Dependent Claim
24 words
A process for producing an image as claimed in claim 4, wherein said photoreceptor is electrically charged under dark to 300 V or less.
Claim 7
Dependent Claim
17 words
A process for producing an image as claimed in claim 2, wherein said magnetic material is ferrite.
Claim 8
Dependent Claim
46 words
A process for producing an image as claimed in claim 2, wherein said magnetic resin carrier has an average particle diameter of from 50 to 70 μm, where the content of particles having a diameter of 63 μm or more is 45% by weight or more.
Claim 9
Dependent Claim
30 words
A process for producing an image as claimed in claim 2, wherein the weight ratio of said magnetic resin carrier to said magnetic material carrier is from 10/90 to 30/70.
Claim 10
Dependent Claim
33 words
A process for producing an image as claimed in claim 2, wherein the amount of said toner is from 5 to 9 parts by weight per 100 parts by weight of said carrier.
Claim 11
Dependent Claim
29 words
A process for producing an image as claimed in claim 1, wherein said toner is an abrasive toner comprising abrasive fine particles fixed on the surface of toner particles.
Claim 12
Dependent Claim
24 words
A process for producing an image as claimed in claim 1, wherein said photoreceptor is electrically charged under dark to 400 V or less.
Claim 13
Dependent Claim
24 words
A process for producing an image as claimed in claim 5, wherein said photoreceptor is electrically charged under dark to 300 V or less.
Claim 14
Dependent Claim
24 words
A process for producing an image as claimed in claim 1, wherein said photoconductive layer has a thickness of from 8 to 25 μm.
Claim 15
Dependent Claim
24 words
A process for producing an image as claimed in claim 13, wherein said photoconductive layer has a thickness of from 2 to 25 μm.
Claim 16
Dependent Claim
17 words
A process for producing an image as claimed in claim 1, wherein said magnetic material is ferrite.
Claim 17
Dependent Claim
46 words
A process for producing an image as claimed in claim 1, wherein said magnetic material carrier has an average particle diameter of from 35 to 55 μm, where the content of particles having a diameter of 44 μm or more is 50% by weight or more.
Claim 18
Dependent Claim
33 words
A process for producing an image as claimed in claim 1, wherein the amount of said toner is from 5 to 9 parts by weight per 100 parts by weight of said carrier.
Claim 19
Dependent Claim
74 words
A two-component developer comprising a carrier and a toner, said carrier is a composite carrier comprising a mixture of (a) a magnetic material having an average particle diameter of from 35 to 60 μm, where the content of the particles having a diameter of 44 μm or more is 35% by weight or more, and (b) a magnetic resin carrier comprising particles of a binder resin dispersed therein fine particles of a magnetic material.
Claim 20
Dependent Claim
74 words
A two-component developer comprising a carrier and a toner, said carrier is a composite carrier comprising a mixture of (a) a magnetic material having an average particle diameter of from 35 to 60 μm, where the content of the particles having a diameter of 44 μm or more is 35% by weight or more, and (b) a magnetic resin carrier comprising particles of a binder resin dispersed therein fine particles of a magnetic material.
Claim 21
Dependent Claim
79 words
A two-component developer as claimed in claim 18, wherein said carrier is a composite carrier comprising a mixture of (a) a magnetic material carrier comprising particles of a magnetic material having an average particle diameter of from 35 to 55 μm, the content of particles having a diameter of 44 μm or more being 35% by weight or more, and (b) a magnetic resin carrier comprising particles of a binder resin dispersed therein fine particles of a magnetic material.
Claim 22
Dependent Claim
26 words
A two-component developer as claimed in claim 19, wherein said toner is an abrasive toner comprising abrasive fine particles fixed on the surface of toner particles.
Claim 23
Dependent Claim
43 words
A two-component developer as claimed in claim 19, wherein said magnetic resin carrier has an average particle diameter of from 50 to 70 μm, where the content of particles having a diameter of 63 μm or more is 45% by weight or more.
Claim 24
Dependent Claim
27 words
A two-component developer as claimed in claim 19, wherein the weight ratio of said magnetic resin carrier to said magnetic material carrier is from 10/90 to 30/70.
Claim 25
Dependent Claim
30 words
A two-component developer as claimed in claim 19, wherein the amount of said toner is from 5 to 9 parts by weight per 100 parts by weight of said carrier.
Claim 26
Dependent Claim
26 words
A two-component developer as claimed in claim 18, wherein said toner is an abrasive toner comprising abrasive fine particles fixed on the surface of toner particles.
Claim 27
Dependent Claim
43 words
A two-component developer as claimed in claim 18, wherein said magnetic material carrier has an average particle diameter of from 35 to 55 μm, where the content of particles having a diameter of 44 μm or more is 50% by weight or more.
Claim 28
Dependent Claim
30 words
A two-component developer as claimed in claim 18, wherein the amount of said toner is from 5 to 9 parts by weight per 100 parts by weight of said carrier.
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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) | 2001-10-19 | 2002-04-20 | 2002-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-19 | 2006-04-20 | 2006-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-19 | 2010-04-20 | 2010-10-20 | $7700.00 | Window Closed / Lapsed |