Patent EP0487046A2 successfully refreshed from Google Patents.
EP0487046A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image forming apparatus
Assignee: Canon Inc
•
Filing: 1991-11-19
•
Granted: —
•
Expires: 2011-11-19
Abstract
Abstract The present invention provides an image forming apparatus comprising: an image bearing member (3); an image forming means for forming a toner image on the image bearing member (3), the average volume particle diameter of toner being 3 - 10 µm; a movable transfer sheet bearing means (93) for bearing a transfer sheet; and a transfer member for transferring the toner image formed on the image bearing member onto the transfer sheet carried by the transfer sheet bearing means at a transfer station, the transfer member comprising a fiber brush (23) engageable by the transfer sheet bearing means (93) at a side opposite to the image bearing member (3) at the transfer station.
Inventors
- 👤 Akira Watanave
- 👤 Tatsuo Takeuchi
- 👤 Kenichiro Waki
- 👤 Yasushi Miura
- 👤 Takeo Tsunemi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:18
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0105; G03G15/0131; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/0174; G03G2215/0177; G03G2215/16; G03G2215/1604; G03G2215/1628
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
103 words
An image forming apparatus comprising: an image bearing member; an image forming means for forming a toner image on said image bearing member, the average volume particle diameter of toner being 3 - 10 µm; a movable transfer sheet bearing means for bearing a transfer sheet; and a transfer member for transferring the toner image formed on said image bearing member onto the transfer sheet carried by said transfer sheet bearing means at a transfer station, said transfer member comprising a fiber brush engageable by said transfer sheet bearing means at a side opposite to said image bearing member at said transfer station.
Claim 2
Dependent Claim
38 words
An image forming apparatus according to claim 1, further including an electric power source for supplying an electric power to said transfer member to generate a transfer electric field between said image bearing member and said transfer member.
Claim 3
Dependent Claim
16 words
An image forming apparatus according to claim 1 or 2, wherein said fiber brush is conductive.
Claim 4
Dependent Claim
21 words
An image forming apparatus according to claim 3, wherein the volume resistivity of said fiber brush is 10¹⁰ Ωcm or less.
Claim 5
Dependent Claim
21 words
An image forming apparatus according to claim 3, wherein the volume resistivity of said fiber brush is 10⁸ Ωcm or less.
Claim 6
Dependent Claim
25 words
An image forming apparatus according to claim 1 or 2, wherein said transfer sheet bearing means includes a dielectric sheet for bearing the transfer sheet.
Claim 7
Dependent Claim
38 words
An image forming apparatus according to claim 2, further including a regulating member disposed in the vicinity of said transfer member and adapted to regulate the transfer electric field between said image bearing meter and said transfer member.
Claim 8
Dependent Claim
35 words
An image forming apparatus according to claim 7, wherein said regulating member regulates the transfer electric field at an upstream side of said transfer station in a moving direction of said transfer sheet bearing means.
Claim 9
Dependent Claim
16 words
An image forming apparatus according to claim 7 or 8, wherein said regulating member is insulative.
Claim 10
Dependent Claim
30 words
An image forming apparatus according to claim 1, wherein a plurality of the toner images are transferred and superimposed on the transfer sheet carried by said transfer sheet bearing means.
Claim 11
Dependent Claim
23 words
An image forming apparatus according to claim 10, wherein after the transferring and superimposing, a full-color image is formed on the transfer sheet.
Claim 12
Dependent Claim
36 words
An image forming apparatus according to claim 6, wherein said transfer sheet bearing means is disposed transverse to the moving direction of said transfer sheet bearing means and has a frame for supporting said dielectric sheet.
Claim 13
Dependent Claim
122 words
An image forming apparatus comprising: an image bearing member; an image forming means for forming a toner image on said image bearing member; a movable transfer sheet bearing means for bearing a transfer sheet; a transfer member for transferring the toner image formed on said image bearing member onto the transfer sheet carried by said transfer sheet bearing means through a transfer electric field generated at a transfer station, said transfer member being engageable by said transfer sheet bearing means at a side opposite to said image bearing member at said transfer station; and a regulating member disposed in the vicinity of said transfer member and adapted to regulate the transfer electric field between said image bearing member and said transfer member.
Claim 14
Dependent Claim
29 words
An image forming apparatus according to claim 13, further including an electric power source for supplying an electric power to said transfer member to generate the transfer electric field.
Claim 15
Dependent Claim
14 words
An image forming apparatus according to claim 13, wherein said transfer member is conductive.
Claim 16
Dependent Claim
21 words
An image forming apparatus according to claim 13, wherein the volume resistivity of said transfer member is 10¹⁰ Ωcm or less.
Claim 17
Dependent Claim
21 words
An image forming apparatus according to claim 13, wherein the volume resistivity of said transfer member is 10⁸ Ωcm or less.
Claim 18
Dependent Claim
23 words
An image forming apparatus according to claim 13, wherein said transfer sheet bearing means includes a dielectric sheet for bearing the transfer sheet.
Claim 19
Dependent Claim
35 words
An image forming apparatus according to claim 13, wherein said regulating member regulates the transfer electric field at an upstream side of said transfer station in a moving direction of said transfer sheet bearing means.
Claim 20
Dependent Claim
16 words
An image forming apparatus according to claim 13 or 19, wherein said regulating member is insulative.
Claim 21
Dependent Claim
30 words
An image forming apparatus according to claim 13, wherein a plurality of the toner image are transferred and superimposed on the transfer sheet carried by said transfer sheet bearing means.
Claim 22
Dependent Claim
23 words
An image forming apparatus according to claim 21, wherein, after the transferring and superimposing, a full-color image is formed on the transfer sheet.
Claim 23
Dependent Claim
16 words
An image forming apparatus according to claim 13, wherein said transfer member comprises a fiber brush.
Claim 24
Dependent Claim
32 words
An image forming apparatus according to claim 13 or 23, further including an elastic sheet for supporting said transfer member and for urging said transfer member against said transfer sheet bearing means.
Claim 25
Dependent Claim
14 words
An image forming apparatus according to claim 24, wherein said elastic sheet is dielectric.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.