US3777164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for sheet material surface treatment apparatus
Assignee: Polaroid Corp
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Filing: 1972-09-29
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Granted: 1973-12-04
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Expires: 1992-09-29
Abstract
Abstract An improved electrode for use in apparatus for the treatment of the surface of a thin sheet of material includes an electrically conductive cylindrical core, a thin layer of dielectric material covering the cylindrical surface of the core, and an outer layer or sheath of electrically conductive material insulated from the core and completely surrounding the dielectric material. The electrode cooperates with one or more stationary electrodes in corona treatment apparatus to reduce the possibility of electrode arcing and to establish an electric field in the electrode gap with greater efficiency than the prior art.
Inventors
- 👤 M Osman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:01
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; B26; B26F; B26F1/00; B26F1/26; B26F1/28; B29; B29C; B29C59/00; B29C59/10; H; H01; H01T; H01T19/00; B01J2219/00; B01J2219/08; B01J2219/0803; B01J2219/0805; B01J2219/0845; B01J2219/0849
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
Apparatus for exposing the surface of a thin sheet of dielectric material to an electrical charge which comprises at least two electrodes adapted to be maintained at first and second electric potentials and spaced to accommodate the passage of said thin sheet of material therebetween, one of said electrodes comprising: an electrically-conductive cylinder adapted to be maintained at said first electric potential; and a cylindrical conductive member coaxially disposed about said cylinder and associated therewith in spaced, electrically insulated relationship such that said con-ductive member and said cylinder exhibit capacitive coupling.
Claim 2
Dependent Claim
91 words
Apparatus for exposing the surface of a thin sheet of dielectric material to an electrical charge which comprises at least two electrodes adapted to be maintained at first and second electric potentials and spaced to accommodate the passage of said thin sheet of material therebetween, one of said electrodes comprising: an electrically-conductive cylinder adapted to be maintained at said first electric potential; and a cylindrical conductive member coaxially disposed about said cylinder and associated therewith in spaced, electrically insulated relationship such that said con-ductive member and said cylinder exhibit capacitive coupling.
Claim 3
Dependent Claim
12 words
The invention of claim 1 wherein said cylinder is a hollow drum.
Claim 4
Dependent Claim
37 words
The invention of claim 2 wherein said cylindrical conductive member is spaced from said conductive cylinder by a continuous uniform layer of dielectric material in direct contact with both said conductive cylinder and said cylindrical conductive member.
Claim 5
Dependent Claim
31 words
The invention of claim 3 wherein said electrode comprising said conductive cylinder is capable of being rotated thereby providing transport means for said thin sheet of material in frictional engagement therewith.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |