EP0718718A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Recording apparatus and recording method
Assignee: Toray Industries Inc
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Filing: 1995-07-06
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Granted: —
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Expires: 2015-07-06
Abstract
Abstract The present invention is a printing apparatus, in which toner images on a latent image bearing member are electrically transferred onto an intermediate transfer member, for recording onto a recording medium, comprising charging the surface of the intermediate transfer member in the same polarity as the toner image whenever each of the toner images is transferred from the latent image bearing member onto the intermediate transfer member. The present invention can present a printing apparatus and printing method for suppressing the reverse transfer of the toner images onto the photosensitive element when the toner images are transferred in lamination onto the intermediate transfer member, for example, in an electrophotographic printer.
Inventors
- 👤 Hiroyoshi Asada
- 👤 Yuichi Nakao
- 👤 Jun Inagaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:20
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/28; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1605; G03G15/161; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/0174; G03G2215/018; G03G2215/06; G03G2215/0602; G03G2215/0626; G03G2215/0629
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
65 words
A printing apparatus, in which toner images on a latent image bearing member are electrically transferred onto an intermediate transfer member, for recording onto a recording medium, comprising; a charger for charging the surface of the intermediate transfer member in the same polarity as the toner image at each transfer of the toner image from the latent image bearing member onto the intermediate transfer member.
Claim 2
Dependent Claim
29 words
A printing apparatus according to claim 1, wherein the intermediate transfer member has a surface insulation layer of 5 µm or less in dielectric thickness formed on the surface.
Claim 3
Dependent Claim
74 words
A printing apparatus according to claim 1, wherein the developing means develops a latent image on the latent image bearing member by developer liquid; a removing means is provided to remove excess developer liquid from the latent image bearing member with the latent image developed; and the developing means and/or the removing means has a member to have an induced a potential by the latent image bearing member and is grounded through a capacitor.
Claim 4
Dependent Claim
54 words
A printing apparatus according to claim 1, wherein the developing means develops a latent image on the latent image bearing member by developer liquid; and plural removing means are provided to remove excess developer liquid from the latent image bearing member with the latent image developed, and the plural removing means are electrically short-circuited.
Claim 5
Dependent Claim
92 words
A printing apparatus according to claim 1, wherein the developing means develops a latent image on the latent image bearing member by developer liquid; and plural squeeze members for removing excess developer liquid from the latent image bearing member with the latent image developed are arranged along the moving direction of the latent image bearing member, while the squeeze member on the downstream side in the moving direction of the latent image bearing member is located more closely to the latent image bearing member than the squeeze member on the upstream side.
Claim 6
Dependent Claim
87 words
A printing apparatus according to claim 1, wherein the developing means develops a latent image on the latent image bearing member by developer liquid; and plural squeeze members for removing excess developer liquid from the latent image bearing member with the latent image developed are arranged along the moving direction of the latent image bearing member, while the squeeze member on the downstream side in the moving direction of the latent image bearing member is lower in circumferential speed than the squeeze member on the upstream side.
Claim 7
Dependent Claim
66 words
A printing apparatus according to claim 1, wherein the developing means develops a latent image on the latent image bearing member with developer liquid, and has a developing roller arranged to keep a clearance against the latent image bearing member, the developing roller being rotated at a speed to keep the developer liquid in the developing region stable over the full width of the developing roller.
Claim 8
Dependent Claim
81 words
A printing apparatus according to claim 1, wherein the developing means develops a latent image on the latent image bearing member by developer liquid, and has developing roller arranged to keep a clearance against the latent image bearing member, the developing roller having its surface moved in the same direction as the surface of the latent image bearing member, and being rotated at a circumferential speed corresponding to 0.5 to 3 times the circumferential speed of the latent image bearing member.
Claim 9
Dependent Claim
65 words
A printing method, in which toner images on a latent image bearing member are electrically transferred onto an intermediate transfer member, for recording onto a recording medium, comprising; the step of charging the surface of the intermediate transfer member in the same polarity as the toner image at each transfer of the toner image from the latent image bearing member onto the intermediate transfer member.
Claim 10
Dependent Claim
25 words
A printing method according to claim 9, wherein the intermediate transfer member has a surface insulation layer of 5 µm or less in dielectric thickness.
Claim 11
Dependent Claim
120 words
A printing method, in which a printing apparatus provided with a developing means for developing latent image on the latent image bearing member using developer liquid and a removing means for removing excess developer liquid from the latent image bearing member with the latent image developed is used for recording the toner images developed on the latent image bearing member onto a recording medium, comprising; suppressing the variation of the potential induced in the developing means and/or the removing means by the latent image bearing member, and charging the surface of the intermediate transfer member in the same polarity as the image at each electrical transfer of the image from the latent image bearing member onto the intermediate transfer member.
Claim 12
Dependent Claim
49 words
A printing method according to claim 9, wherein the latent image on the latent image bearing member is developed using developer liquid, and excess developer liquid is removed from the latent image bearing member after development of the latent image, using plural removing means kept at the same potential.
Claim 13
Dependent Claim
58 words
A printing method according to claim 9, wherein the latent image on the latent image bearing member is developed using developer liquid, and excess developer liquid on the latent image bearing member is removed after development, by letting the developer liquid pass through plural gaps sequentially made smaller in the moving direction of the latent image bearing member.
Claim 14
Dependent Claim
82 words
A printing method according to claim 9, wherein the latent image on the latent image bearing member is developed using developer liquid, and the excess developer liquid on the latent image bearing member is scraped off after development, by letting the developer liquid pass through plural gaps sequentially made smaller in the moving direction of the latent image bearing member, with the scraping-off speed in the passage through the downstream gap kept lower than that in the passage through the upstream gap.
Claim 15
Dependent Claim
73 words
A printing method according to claim 9, wherein when the latent image on the latent image bearing member is developed, a developing region is formed by developer liquid supplied between the latent image bearing member and the developing roller arranged to keep a clearance, and the developing roller is rotated for development at a speed to keep the developer liquid in the developing region stable over the full width of the developing roller.
Claim 16
Dependent Claim
89 words
A printing method according to claim 9, wherein when the latent image on the latent image bearing member is developed, a developing region is formed by developer liquid supplied between the latent image bearing member and the developing roller arranged to keep a clearance, and the developing roller having its surface moved in the same direction as the surface of the latent image bearing member, and being rotated for development at a circumferential speed corresponding to 0.5 to 3 times the circumferential speed of the latent image bearing member.
References Cited (Backward Citations)
No citation records indexed.
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