US4894686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer roller
Assignee: Olin Hunt Specialty Products Inc
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Filing: 1988-07-29
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Granted: 1990-01-16
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Expires: 2008-07-29
Abstract
Abstract Apparatus for the electrostatic transfer of a developed latent image from a master to an electrically chargeable receiving surface is provided and utilizes a transfer roller that traverses the carrier web to bring the master that is attached to the web adjacent to, but not in contact with, the receiving surface.
Inventors
- 👤 David P. Bujese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:47
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1625; G03G15/163; H; H05; H05K; H05K3/00; H05K3/0073; H05K3/0079; H05K3/02; H05K3/06; H05K3/061; H05K3/065
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
236 words
Apparatus for the electrostatic transfer of a developed image from an electrostatically developable surface to an electrically chargeable receiving surface, comprising in combination: (a) a support frame; (b) supporting means for supporting the receiving surface connected to the support frame; (c) carrier means connected to the frame for supporting the electrostatically developable surface; (d) positioning means connected to the frame for positioning the carrier means relative to the supporting means to permit the electrostatic transfer to occur; (e) transfer means movably connected to the frame and contactable with the carrier means to move the electrostatically developable surface adjacent to, but not in contact with the receiving surface to effect the electrostatic transfer of the developed image, the transfer means being reversible and traversing the carrier means a distance equal to at least the length of the electrostatically developable surface; (f) tensioning means for tensioning the carrier means, the tensioning means being movably connected to the frame and causing the carrier means to form a trailing angle with the receiving surface as the transfer means traverses the carrier means during the electrostatic transfer; and (g) retention means for retaining the carrier means connected to the frame and positioned such that the transfer means is intermediate the tensioning means and the retention means causing the carrier means to form a leading angle with the receiving surface as the transfer means traverses the carrier means during the electrostatic transfer.
Claim 2
Dependent Claim
236 words
Apparatus for the electrostatic transfer of a developed image from an electrostatically developable surface to an electrically chargeable receiving surface, comprising in combination: (a) a support frame; (b) supporting means for supporting the receiving surface connected to the support frame; (c) carrier means connected to the frame for supporting the electrostatically developable surface; (d) positioning means connected to the frame for positioning the carrier means relative to the supporting means to permit the electrostatic transfer to occur; (e) transfer means movably connected to the frame and contactable with the carrier means to move the electrostatically developable surface adjacent to, but not in contact with the receiving surface to effect the electrostatic transfer of the developed image, the transfer means being reversible and traversing the carrier means a distance equal to at least the length of the electrostatically developable surface; (f) tensioning means for tensioning the carrier means, the tensioning means being movably connected to the frame and causing the carrier means to form a trailing angle with the receiving surface as the transfer means traverses the carrier means during the electrostatic transfer; and (g) retention means for retaining the carrier means connected to the frame and positioned such that the transfer means is intermediate the tensioning means and the retention means causing the carrier means to form a leading angle with the receiving surface as the transfer means traverses the carrier means during the electrostatic transfer.
Claim 3
Dependent Claim
14 words
The apparatus according to claim 1 wherein the retention means is further electrically charged.
Claim 4
Dependent Claim
13 words
The apparatus according to claim 2 wherein the tensioning means is electrically grounded.
Claim 5
Dependent Claim
19 words
The apparatus according to claim 3 wherein the carrier means further has an electrically chargeable surface adjacent the master.
Claim 6
Dependent Claim
21 words
The apparatus according to claim 4 wherein the carrier means further has the electrically chargeable surface connected to a non-conductive substrate.
Claim 7
Dependent Claim
13 words
The apparatus according to claim 5 wherein the non-conductive substrate further is flexible.
Claim 8
Dependent Claim
27 words
The apparatus according to claim 6 wherein the carrier means is further a generally rectangular and longitudinally extending web between the tensioning means and the retention means.
Claim 9
Dependent Claim
21 words
The apparatus according to claim 7 wherein the conductive surface of the carrier means further comprises a coating of silver-containing compound.
Claim 10
Dependent Claim
41 words
The apparatus according to claim 7 wherein the electrostatically developable surface further comprises a multilayer sheet having a first non-conductive layer adjacent the carrier means, an intermediate conductive layer and a third photosensitive material layer containing a developable persistent latent image.
Claim 11
Dependent Claim
24 words
The apparatus according to claim 5 wherein the leading angle increases as the transfer means traverses from the tensioning means toward the retention means.
Claim 12
Dependent Claim
17 words
The apparatus according to claim 10 wherein the leading angle varies between about 1° to about 30°.
Claim 13
Dependent Claim
24 words
The apparatus according to claim 10 wherein the trailing angle decreases as the transfer means traverses from the tensioning means to the retention means.
Claim 14
Dependent Claim
17 words
The apparatus according to claim 11 wherein the trailing angle varies from about 10° to about 45°.
Claim 15
Dependent Claim
14 words
The apparatus according to claim 5 wherein the transfer means is a rotatable roller.
Claim 16
Dependent Claim
15 words
The apparatus according to claim 14 wherein the tensioning means is a spring loaded roller.
Claim 17
Dependent Claim
14 words
The apparatus according to claim 15 wherein the retention means is a stationary roller.
Claim 18
Dependent Claim
13 words
The apparatus according to claim 1 wherein the retention means is electrically grounded.
Claim 19
Dependent Claim
13 words
The apparatus according to claim 2 wherein the tensioning means is electrically charged.
Claim 20
Dependent Claim
14 words
The apparatus according to claim 6 wherein the flexible non-conductive substrate is polyethylene terephthalate.
Claim 21
Dependent Claim
18 words
The apparatus according to claim 1 wherein the electrically chargeable receiving surface is a non-conductive or semiconductive material.
Claim 22
Dependent Claim
168 words
Apparatus for the electrostatic transfer of a developed image from an electrostatically developable surface supported by carrier means to an electrically chargeable receiving surface, the improvement comprising in combination: (a) transfer means contactable with the carrier means to move the electrostatically developable surface adjacent to, but not in contact with the receiving surface to effect the electrostatic transfer of the developed image, the transfer means being reversible and traversing the carrier means a distance equal to at least the length of the electrostatically developable surface; (b) tensioning means for tensioning the carrier means causing the carrier means to form a trailing angle with the receiving surface as the transfer means traverses the carrier means during the electrostatic transfer; and (c) retention means for retaining the carrier means and positioned such that the transfer means is intermediate the tensioning means and the retention means causing the carrier means to form a leading angle with the receiving surface as the transfer means traverses the carrier means during the electrostatic transfer.
Claim 23
Dependent Claim
168 words
Apparatus for the electrostatic transfer of a developed image from an electrostatically developable surface supported by carrier means to an electrically chargeable receiving surface, the improvement comprising in combination: (a) transfer means contactable with the carrier means to move the electrostatically developable surface adjacent to, but not in contact with the receiving surface to effect the electrostatic transfer of the developed image, the transfer means being reversible and traversing the carrier means a distance equal to at least the length of the electrostatically developable surface; (b) tensioning means for tensioning the carrier means causing the carrier means to form a trailing angle with the receiving surface as the transfer means traverses the carrier means during the electrostatic transfer; and (c) retention means for retaining the carrier means and positioned such that the transfer means is intermediate the tensioning means and the retention means causing the carrier means to form a leading angle with the receiving surface as the transfer means traverses the carrier means during the electrostatic transfer.
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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) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |