US4051044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge surface treating apparatus
Assignee: SOFTAL ELEKTRONIK ERIK BLUMENFELD KG
•
Filing: 1975-12-29
•
Granted: 1977-09-27
•
Expires: 1995-12-29
Abstract
Abstract Apparatus for treating the surface of an object by means of an electrical discharge comprises a cylindrical electrode and a knife electrode, arranged on the same side of the surface to be treated, the knife electrode being tangential to the cylindrical electrode and separated therefrom by a discharge gap through which there is a flow of gas towards the object under treatment.
Inventors
- 👤 Bent Sorensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:45
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/10; B29C59/103; B29C59/106; B29C59/12; H; H01; H01T; H01T19/00; B29L; B29L2009/00; B29L2031/00; B29L2031/712; B29L2031/7158
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
Apparatus for the treatment of the surface of an object of conductive or non-conductive material by raising the surface energy thereof, comprising: means defining a first rotatable cylindrical electrode with a surface adapted to lie along the surface of the object, a second knife-like electrode with the edge thereof lying along said surface of said cylindrical electrode in closely spaced relation to define a discharge gap between the electrodes, the knife-like electrode lying substantially tangentially to the cylindrical electrode, object-supporting means adapted to maintain such an object in contact with said surface of said first cylindrical electrode, and means for providing a flow of gas through the discharge gap between the electrodes.
Claim 2
Dependent Claim
112 words
Apparatus for the treatment of the surface of an object of conductive or non-conductive material by raising the surface energy thereof, comprising: means defining a first rotatable cylindrical electrode with a surface adapted to lie along the surface of the object, a second knife-like electrode with the edge thereof lying along said surface of said cylindrical electrode in closely spaced relation to define a discharge gap between the electrodes, the knife-like electrode lying substantially tangentially to the cylindrical electrode, object-supporting means adapted to maintain such an object in contact with said surface of said first cylindrical electrode, and means for providing a flow of gas through the discharge gap between the electrodes.
Claim 3
Dependent Claim
42 words
Apparatus as claimed in claim 1, further comprising means defining walls cooperating with the knife-like electrode in defining a closed pressure chamber, the cylindrical electrode lying substantially within the closed chamber, and said knife-like electrode forming a wall portion of the chamber.
Claim 4
Dependent Claim
59 words
Apparatus as claimed in claim 2, and including a pair of said knife-like electrodes forming adjacent wall portions of the closed chamber and defining between them a space through which the cylindrical electrode is exposed and each of said knife-like electrodes being substantially tangential to the surface of the cylindrical electrode and being separated therefrom by a discharge gap.
Claim 5
Dependent Claim
26 words
Apparatus as claimed in claim 3, in which the knife-like electrodes are arranged obliquely of each other and in a direction convergently toward the cylindrical electrode.
Claim 6
Dependent Claim
33 words
Apparatus as claimed in claim 1, including means for supplying to the voltage-carrying electrode an electric waveform the frequency of which lies above 10 kHz and the voltage of which is above 5kV.
References Cited (Backward Citations)
CA827128A
Cited
GB715914A
Cited
GB802254A
Cited
US2969463A
Cited
US3057792A
Cited
GB933577A
Cited
US3135676A
Cited
US3166488A
Cited
US3157785A
Cited
US3182103A
Cited
US3196270A
Cited
US3376208A
Cited
US3405052A
Cited
US3294971A
Cited
US3396308A
Cited
US3483374A
Cited
GB1182704A
Cited
US3503859A
Cited
US3507763A
Cited
GB1254600A
Cited
GB1212620A
Cited
US3668097A
Cited
US3669720A
Cited
US3708733A
Cited
DE2220886A1
Cited
US3973132A
Cited
US3959104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |