US4748474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming method and apparatus using developer having toner generally from one to five microns in size and a lubricant
Assignee: Canon Inc
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Filing: 1986-08-22
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Granted: 1988-05-31
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Expires: 2006-08-22
Abstract
Abstract An image forming method and apparatus using an image bearing member, movable along an endless path, for bearing a toner image and having a critical surface tension of not more than 33 dyne/cm, wherein, the toner image formed on the image bearing member by a developer containing toner not less than 70% of which has a particle size of 1-5 microns, and lubricant in an amount not less than 0.5% by weight of the toner, and the image bearing member is cleaned by removing the toner image remaining on the image bearing member.
Inventors
- 👤 Katsumi Kurematsu
- 👤 Kenichi Takeda
- 👤 Yuji Sakemi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:09
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G13/00; G03G13/06; G03G13/08; G03G13/09; G03G9/00; G03G9/08; G03G9/097; G03G9/09783; G03G9/09791
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
An image forming apparatus, comprising: an image bearing member, movable along an endless path, for bearing a toner image, said image bearing member having a surface with a critical surface tension of not more than 33 dyne/cm; means for forming a toner image on said image bearing member by applying a developer, the developer containing toner, not less than 70% by weight of which has particles from 1 to 5 microns in size, and not less than 0.5% by weight of a lubricant based on the weight of the toner; and means for cleaning said image bearing member by removing the toner image remaining on said image bearing member.
Claim 2
Dependent Claim
109 words
An image forming apparatus, comprising: an image bearing member, movable along an endless path, for bearing a toner image, said image bearing member having a surface with a critical surface tension of not more than 33 dyne/cm; means for forming a toner image on said image bearing member by applying a developer, the developer containing toner, not less than 70% by weight of which has particles from 1 to 5 microns in size, and not less than 0.5% by weight of a lubricant based on the weight of the toner; and means for cleaning said image bearing member by removing the toner image remaining on said image bearing member.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein said cleaning means comprises a cleaning blade.
Claim 4
Dependent Claim
25 words
A method according to claim 1, wherein not less than 90% of the toner particles constituting the developer have the particle size of 1-5 microns.
Claim 5
Dependent Claim
21 words
An apparatus according to claim 1, wherein the toner particles and the lubricant, in the form of particles, are mixed together.
Claim 6
Dependent Claim
14 words
An apparatus according to claim 1, wherein each of the toner particles contains lubricant.
Claim 7
Dependent Claim
96 words
An image forming method comprising: providing an image bearing member movable along an endless path and having a surface with a critical surface tension of not more than 33 dyne/cm; forming a toner image on said image bearing member by applying a developer containing toner, not less than 70% by weight of which has particles from 1 to 5 microns in size, and not less than 0.5% by weight of a lubricant based on the weight of the toner; and cleaning said image bearing member by removing the toner image remaining on said image bearing member.
Claim 8
Dependent Claim
96 words
An image forming method comprising: providing an image bearing member movable along an endless path and having a surface with a critical surface tension of not more than 33 dyne/cm; forming a toner image on said image bearing member by applying a developer containing toner, not less than 70% by weight of which has particles from 1 to 5 microns in size, and not less than 0.5% by weight of a lubricant based on the weight of the toner; and cleaning said image bearing member by removing the toner image remaining on said image bearing member.
Claim 9
Dependent Claim
15 words
A method according to claim 6, wherein said cleaning is effected by a cleaning blade.
Claim 10
Dependent Claim
25 words
A method according to claim 6, wherein not less than 90% of the toner particles constituting the developer have the particle size of 1-5 microns.
Claim 11
Dependent Claim
21 words
A method according to claim 6, wherein the toner particles and the lubricant, in the form of particles, are mixed together.
Claim 12
Dependent Claim
14 words
A method according to claim 6, wherein each of the toner particles contains lubricant.
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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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |