Patent US3841892A successfully refreshed from Google Patents.
US3841892A
Expired / Lapsed
US
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Method for transferring developed image
Assignee: International Business Machines Corp
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Filing: 1972-08-10
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Granted: 1974-10-15
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Expires: 1992-08-10
Abstract
Abstract A method and apparatus for transferring a developed electrostatic image from an image-bearing member to a medium such as copy paper in response to the evenly distributed field produced by a D.C. biased metallized fiber brush roller which contacts the copy paper to produce the transfer.
Inventors
- 👤 K Krause
- 👤 Y Moradazeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:56
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
THE METHOD OF TRANSFERRING A DEVELOPED IMAGE COMPRISING ELECTROSTATICALLY CHARGED DEVELOPER PARTICLES FROM AN IMAGE FORMING SURFACE TO A WEB OF TRANSFER MATERIAL COMPRISING THE STEPS OF: FORMING A DEVELOPED IMAGE ON AN IMAGE FORMING SURFACE, PLACING OVER THE DEVELOPED IMAGE A WEB OF TRANSFER MATERIAL, ROTATING A BRUSH MEANS COMPRISING A PLURALITY OF CONDUCTIVE FIBERS, PRODUCING A CONSTANT POTENTIAL DEFFERENCE BETWEEN SAID BRUSH MEANS AND SAID IMAGE FORMING SURFACE, AND PRODUCING RELATIVE MOTION BETWEEN THE BRUSH OEANS AND THE IMAGE FORMING SURFACE SO THAT THE TIPS OF THE FIBERS MOVE THE WEB OF TRANSFER MATERIAL INTO ABUTTING CONTACT WITH SAID IMAGE FORMING SURFACE WHEREBY SAID POTENTIAL IS OPERATIVE TO TRANSFER THE DEVELOPED IMAGE TO SAID WEB OF TRANSFER MATERIAL.
Claim 2
Independent Claim
120 words
THE METHOD OF TRANSFERRING A DEVELOPED IMAGE COMPRISING ELECTROSTATICALLY CHARGED DEVELOPER PARTICLES FROM AN IMAGE FORMING SURFACE TO A WEB OF TRANSFER MATERIAL COMPRISING THE STEPS OF: FORMING A DEVELOPED IMAGE ON AN IMAGE FORMING SURFACE, PLACING OVER THE DEVELOPED IMAGE A WEB OF TRANSFER MATERIAL, ROTATING A BRUSH MEANS COMPRISING A PLURALITY OF CONDUCTIVE FIBERS, PRODUCING A CONSTANT POTENTIAL DEFFERENCE BETWEEN SAID BRUSH MEANS AND SAID IMAGE FORMING SURFACE, AND PRODUCING RELATIVE MOTION BETWEEN THE BRUSH OEANS AND THE IMAGE FORMING SURFACE SO THAT THE TIPS OF THE FIBERS MOVE THE WEB OF TRANSFER MATERIAL INTO ABUTTING CONTACT WITH SAID IMAGE FORMING SURFACE WHEREBY SAID POTENTIAL IS OPERATIVE TO TRANSFER THE DEVELOPED IMAGE TO SAID WEB OF TRANSFER MATERIAL.
Claim 3
Independent Claim
129 words
The method of transferring a developed image comprising electrostatically charged developer particles from an image forming surface to a web of transfer material comprising the steps of: forming a developed image on an image forming surface; placing over the developed image a web of transfer material; rotating a brush means comprising a plurality of fibers, said fibers comprising non-conductive fibers having a conductive coating thereon; producing a constant potential difference between said brush means and said image forming surface; and producing relative motion between the brush means and the image forming surface so that the tips of the fibers move the web of transfer material into abutting contact with said image forming surface whereby said potential is operative to transfer the developed image to said web of transfer material.
Claim 4
Independent Claim
129 words
The method of transferring a developed image comprising electrostatically charged developer particles from an image forming surface to a web of transfer material comprising the steps of: forming a developed image on an image forming surface; placing over the developed image a web of transfer material; rotating a brush means comprising a plurality of fibers, said fibers comprising non-conductive fibers having a conductive coating thereon; producing a constant potential difference between said brush means and said image forming surface; and producing relative motion between the brush means and the image forming surface so that the tips of the fibers move the web of transfer material into abutting contact with said image forming surface whereby said potential is operative to transfer the developed image to said web of transfer material.
Claim 5
Dependent Claim
13 words
The method according to claim 2 wherein said non-conductive fibers comprise synthetic material.
References Cited (Backward Citations)
US2901374A
Cited
US2959153A
Cited
US3152012A
Cited
US3328193A
Cited
US3368894A
Cited
US3551146A
Cited
US3589895A
Cited
US3627523A
Cited
US3599603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |