Patent US4169673A successfully refreshed from Google Patents.
US4169673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image transfer device
Assignee: Canon Inc
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Filing: 1977-12-30
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Granted: 1979-10-02
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Expires: 1997-12-30
Abstract
Abstract An improved image transfer device for intermittently bringing a continuous image transfer medium into contact with the images on an image bearing member and transferring the images from the image bearing member to the image transfer medium. The image transfer device of the present invention utilizes an air pressure to bring the continuous image transfer medium into contact with and separate it from the image bearing member without the transfer medium and the surface of the image bearing member being contacted by a mechanical member such as an image transfer roller or bar or the like.
Inventors
- 👤 Yasushi Sato
- 👤 Tsutomu Toyono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:07
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/164
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
An image transfer device having a transfer station where a continuous transfer material is brought into contact with an image formed on an image bearing member, and the image is transferred onto a transfer material, said device comprising: means for feeding and guiding the continuous transfer material to the transfer station; means for transferring the image from the image bearing member onto the transfer material; air flow means for controlling a flow of air to and from said transfer means to force the transfer material into contact with the image bearing member during image transfer, and to separate and remove the transfer material from contact with the image bearing member; and means for guiding and transporting the continuous transfer material away from the transfer station.
Claim 2
Dependent Claim
125 words
An image transfer device having a transfer station where a continuous transfer material is brought into contact with an image formed on an image bearing member, and the image is transferred onto a transfer material, said device comprising: means for feeding and guiding the continuous transfer material to the transfer station; means for transferring the image from the image bearing member onto the transfer material; air flow means for controlling a flow of air to and from said transfer means to force the transfer material into contact with the image bearing member during image transfer, and to separate and remove the transfer material from contact with the image bearing member; and means for guiding and transporting the continuous transfer material away from the transfer station.
Claim 3
Dependent Claim
14 words
A device according to claim 1, wherein, said transferring means includes a corona discharger.
Claim 4
Dependent Claim
165 words
An image transfer device having a transfer station where a continuous transfer material is brought into contact with an image formed on an image bearing member, and the image is transferred onto the transfer material, said device comprising: means for feeding and guiding the continuous transfer material to the transfer station; means for transferring the image from the image bearing member onto the transfer material; air flow means for bringing said transfer material in contact with said image bearing member for effecting image transfer, and for subsequently separating and removing said material from said member, said air flow means being disposed at the transfer station for blowing air to the transfer material, during transfer of the image, to bring the transfer material into contact with the image bearing member, and for sucking air upon completion of said transfer to remove the transfer material from contact with the image bearing member; and means for guiding and transporting the continuous transfer material away from the transfer station.
Claim 5
Dependent Claim
165 words
An image transfer device having a transfer station where a continuous transfer material is brought into contact with an image formed on an image bearing member, and the image is transferred onto the transfer material, said device comprising: means for feeding and guiding the continuous transfer material to the transfer station; means for transferring the image from the image bearing member onto the transfer material; air flow means for bringing said transfer material in contact with said image bearing member for effecting image transfer, and for subsequently separating and removing said material from said member, said air flow means being disposed at the transfer station for blowing air to the transfer material, during transfer of the image, to bring the transfer material into contact with the image bearing member, and for sucking air upon completion of said transfer to remove the transfer material from contact with the image bearing member; and means for guiding and transporting the continuous transfer material away from the transfer station.
Claim 6
Dependent Claim
15 words
A device according to claim 3, wherein said air flow means includes a pipe nozzle.
Claim 7
Dependent Claim
28 words
A device according to claim 3, wherein said feeding and guiding means includes a guiding plate having an opening and a suction fan disposed under said guiding plate.
Claim 8
Dependent Claim
39 words
A device according to claim 3, wherein said air flow means includes an inner pipe having a longitudinal opening, and an external pipe having a longitudinal opening, said external pipe being concentric with and spaced from the inner pipe.
Claim 9
Dependent Claim
39 words
A device according to claim 6, wherein, one of said pipes is rotatable with respect to the other, and wherein the air flow is changed in its direction by rotating the external pipe with respect to said inner pipe.
References Cited (Backward Citations)
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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) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |