US5335053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus with grounded conductive member contacting a recording sheet bearing member
Assignee: Canon Inc
•
Filing: 1993-03-17
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Granted: 1994-08-02
•
Expires: 2013-03-17
Abstract
Abstract The present invention provides an image forming apparatus with a recording sheet bearing member for bearing a recording sheet on which an image is to be formed, a charger brush contacting with a surface of the recording sheet bearing member opposite to a surface thereof on which the recording sheet is carried, and adapted to apply charge to the carrying member, and a grounded conductive member arranged out of a range of movement of a tip of the charger brush.
Inventors
- 👤 Takashi Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:41
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/165; G03G15/1655
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
102 words
An image forming apparatus, comprising: a recording sheet bearing member for bearing a recording sheet on which an image is to be formed; a charger brush contacting a surface of said recording sheet bearing member opposite to a surface thereof on which the recording sheet is born and adapted to apply charge to said recording sheet bearing member; and a grounded conductive member arranged out of a range of movement of a tip of said charger brush, wherein said conductive member has opposed ring portions between which said charger brush is disposed, and said ring portions support said recording sheet bearing member.
Claim 2
Dependent Claim
102 words
An image forming apparatus, comprising: a recording sheet bearing member for bearing a recording sheet on which an image is to be formed; a charger brush contacting a surface of said recording sheet bearing member opposite to a surface thereof on which the recording sheet is born and adapted to apply charge to said recording sheet bearing member; and a grounded conductive member arranged out of a range of movement of a tip of said charger brush, wherein said conductive member has opposed ring portions between which said charger brush is disposed, and said ring portions support said recording sheet bearing member.
Claim 3
Dependent Claim
17 words
An image formed apparatus according to claim 1, wherein said conductive member is grounded via a resistor.
Claim 4
Dependent Claim
26 words
An image forming apparatus according to claim 1, wherein said ring portions have cut-outs so that said ring portions are not contacted with said charger brush.
Claim 5
Dependent Claim
37 words
An image forming apparatus according to claim 1, further comprising an image bearing member, and wherein an image formed on said image bearing member is transferred onto the recording sheet born by said recording sheet bearing member.
Claim 6
Dependent Claim
31 words
An image forming apparatus according to claim 1, wherein, before the image is formed on the recording sheet, said recording sheet can be electrostatically adhered to said recording sheet bearing member.
Claim 7
Dependent Claim
36 words
An image forming apparatus according to claim 4, wherein the image formed on said image bearing member is transferred onto the recording sheet born by said recording sheet bearing member, by means of said charger brush.
Claim 8
Dependent Claim
46 words
An image forming apparatus according to claim 4, wherein a plurality of color images can be formed on said image bearing member, and said plurality of color images are successively transferred onto the recording sheet carried by said recording sheet bearing member in a superimposed fashion.
Claim 9
Dependent Claim
22 words
An image forming apparatus according to claim 7, wherein the image forming apparatus can form a full-color image on the recording sheet.
Claim 10
Dependent Claim
90 words
An image forming apparatus, comprising: a recording sheet bearing member for bearing a recording sheet on which an image is to be formed; a charger brush contacting with a surface of said recording sheet bearing member opposite to a surface thereof on which the recording sheet is carried, and adapted to apply charge to said recording sheet bearing member; and a grounded conductive member arranged within a range of movement of a tip of said charger brush, and having an insulation member between said conductive member and said charger brush.
Claim 11
Dependent Claim
90 words
An image forming apparatus, comprising: a recording sheet bearing member for bearing a recording sheet on which an image is to be formed; a charger brush contacting with a surface of said recording sheet bearing member opposite to a surface thereof on which the recording sheet is carried, and adapted to apply charge to said recording sheet bearing member; and a grounded conductive member arranged within a range of movement of a tip of said charger brush, and having an insulation member between said conductive member and said charger brush.
Claim 12
Dependent Claim
17 words
An image forming apparatus according to claim 9, wherein said conductive member is grounded via a resistor.
Claim 13
Dependent Claim
18 words
An image forming apparatus according to claim 9, wherein said conductive member supports said recording sheet bearing member.
Claim 14
Dependent Claim
33 words
An image forming apparatus according to claim 9, wherein said conductive member has opposed ring portions between which said charger brush is disposed, and said ring portions support said recording sheet bearing member.
Claim 15
Dependent Claim
37 words
An image forming apparatus according to claim 9, further comprising an image bearing member, and wherein an image formed on said image bearing member is transferred onto the recording sheet born by said recording sheet bearing member.
Claim 16
Dependent Claim
31 words
An image forming apparatus according to claim 9, wherein, before the image is formed on the recording sheet, said recording sheet can be electrostatically adhered to said recording sheet bearing member.
Claim 17
Dependent Claim
36 words
An image forming apparatus according to claim 13, wherein the image formed on said image bearing member is transferred onto the recording sheet carried by said recording sheet bearing member, by means of said charger brush.
Claim 18
Dependent Claim
46 words
An image forming apparatus according to claim 13, wherein a plurality of color images can be formed on said image bearing member, and said plurality of color images are successively transferred onto the recording sheet carried by said recording sheet bearing member in a superimposed fashion.
Claim 19
Dependent Claim
22 words
An image forming apparatus according to claim 16, wherein the image forming apparatus can form a full-color image on the recording sheet.
Claim 20
Dependent Claim
15 words
An image forming apparatus according to claim 9, wherein said insulation member has a sheet-shape.
References Cited (Backward Citations)
JPS61232478A
Cited
US5172173A
Cited
US4912516A
Cited
JPH02148075A
Cited
JPH0351865A
Cited
EP0487046A2
Cited
US5227851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |