US4415256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for transferring images
Assignee: Canon Inc
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Filing: 1982-05-24
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Granted: 1983-11-15
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Expires: 2002-05-24
Abstract
Abstract An apparatus for transferring a developed image on an image bearing member includes a transfer corona discharger disposed in opposition to the transfer position of the image bearing member, transfer material bearing member having a dielectric transfer material bearing surface and disposed to move the transfer material passing through the area between the image bearing member and the transfer corona discharger, and transfer material attraction charge applying device disposed on the downstream of the transfer position and in the space between the surface of the image bearing member and the transfer material bearing surface of the transfer material bearing member.
Inventors
- 👤 Takahiro Inoue
- 👤 Yusaku Takada
- 👤 Takao Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:37
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
115 words
Apparatus for transferring a developed image on an image bearing member onto a transfer material supported on transfer material bearing means, said transfer apparatus being characterized by the provision of transfer corona discharge means disposed opposed to the transfer position of the image bearing member; transfer material bearing means having a dielectric transfer material bearing surface and disposed to move the transfer material passing between said image bearing member and said transfer corona discharge means; and transfer material attraction charge applying means disposed on the downstream side of said transfer position and in the space between the surface of said image bearing member and the transfer material bearing surface of said transfer material bearing means.
Claim 2
Dependent Claim
115 words
Apparatus for transferring a developed image on an image bearing member onto a transfer material supported on transfer material bearing means, said transfer apparatus being characterized by the provision of transfer corona discharge means disposed opposed to the transfer position of the image bearing member; transfer material bearing means having a dielectric transfer material bearing surface and disposed to move the transfer material passing between said image bearing member and said transfer corona discharge means; and transfer material attraction charge applying means disposed on the downstream side of said transfer position and in the space between the surface of said image bearing member and the transfer material bearing surface of said transfer material bearing means.
Claim 3
Dependent Claim
30 words
A transfer apparatus as set forth in claim 1, which is characterized in that said transfer material bearing means is a drum having an opening covered with a dielectric sheet.
Claim 4
Dependent Claim
30 words
A transfer apparatus as set forth in claim 1, which is characterized in that said transfer material bearing means is a drum having an opening covered with a dielectric screen.
Claim 5
Dependent Claim
34 words
A transfer apparatus as set forth in claim 2 or 3, is characterized in that said transfer material bearing means is provided with a gripper for holding the leading end of the transfer material.
Claim 6
Dependent Claim
25 words
A transfer apparatus as set forth in claim 1, which is characterized in that said transfer material attraction charge applying means comprises a needle electrode.
Claim 7
Dependent Claim
26 words
A transfer apparatus as set forth in claim 1, which is characterized in that said transfer material attraction charge applying means comprises a saw tooth electrode.
Claim 8
Dependent Claim
26 words
A transfer apparatus as set forth in claim 1, which is characterized in that said transfer material attraction charge applying means comprises a thin wire electrode.
Claim 9
Dependent Claim
31 words
A transfer apparatus as set forth in claim 1, which is characterized in that the discharge electrode of said transfer material attraction charge applying means is directed to the transfer position.
Claim 10
Dependent Claim
115 words
Apparatus for transferring a developed image formed on an endless moving image bearing member onto a transfer material supported on transfer material bearing member, said transfer apparatus being characterized by: transfer corona discharge means disposed opposed to the transfer position of said image bearing member; transfer material bearing means having a dielectric transfer material bearing surface and disposed for cyclically moving the transfer material passing through between said image bearing member and transfer corona discharge means; and transfer material attraction charge applying means disposed on the downstream side of the transfer position and in the space between the surface of said image bearing member and the image bearing surface of said transfer material bearing means.
Claim 11
Dependent Claim
115 words
Apparatus for transferring a developed image formed on an endless moving image bearing member onto a transfer material supported on transfer material bearing member, said transfer apparatus being characterized by: transfer corona discharge means disposed opposed to the transfer position of said image bearing member; transfer material bearing means having a dielectric transfer material bearing surface and disposed for cyclically moving the transfer material passing through between said image bearing member and transfer corona discharge means; and transfer material attraction charge applying means disposed on the downstream side of the transfer position and in the space between the surface of said image bearing member and the image bearing surface of said transfer material bearing means.
Claim 12
Dependent Claim
30 words
A transfer apparatus as set forth in claim 9, which is characterized in that said transfer material bearing means is a drum having an opening covered with a dielectric sheet.
Claim 13
Dependent Claim
30 words
A transfer apparatus as set forth in claim 9, which is characterized in that said transfer material bearing means is a drum having an opening covered with a dielectric screen.
Claim 14
Dependent Claim
35 words
A transfer apparatus as set forth in claim 10 or 11, which is characterized in that said transfer material bearing means is provided with a gripper for holding the leading end of the transfer material.
Claim 15
Dependent Claim
25 words
A transfer apparatus as set forth in claim 9, which is characterized in that said transfer material attraction charge applying means comprises a needle electrode.
Claim 16
Dependent Claim
26 words
A transfer apparatus as set forth in claim 9, which is characterized in that said transfer material attraction charge applying means comprises a saw tooth electrode.
Claim 17
Dependent Claim
26 words
A transfer apparatus as set forth in claim 9, which is characterized in that said transfer material attraction charge applying means comprises a thin wire electrode.
Claim 18
Dependent Claim
31 words
A transfer apparatus as set forth in claim 9, which is characterized in that the discharge electrode of said transfer material attraction charge applying means is directed to the transfer position.
References Cited (Backward Citations)
US3879121A
Cited
US4223993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |