US3865700A
Expired / Lapsed
US
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Process and apparatus for continuously anodizing aluminum
Assignee: Individual
•
Filing: 1973-05-18
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Granted: 1975-02-11
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Expires: 1993-05-18
Abstract
Abstract Aluminum is continuously anodized using direct current in an anodizing cell having a cathode connected to the source of direct current which is succeeded by a cathodic contact cell having an anode connected to the same source of direct current. The anodizing direct current is introduced into the aluminum in the contact cell, the aluminum having an anodized oxide coating formed thereon in the anodizing cell before entering the contact cell.
Inventors
- 👤 Howard A Fromson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:15
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; C; C25; C25D; C25D11/00; C25D11/005; C25D11/02; C25D11/04; C25D11/18; C25D11/20; C25D7/00; C25D7/06; C25D7/0614; C25D7/0621
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
IN A PROCESS FOR CONTINUOUSLY ELECTROLYTICALLY ANODIZING ALUMINUM, THE IMPROVEMENT WHICH COMPRISES INTRODUCING ANODIZING DIRECT CURRENT INTO SAID ALUMINUM IN A CATHODIC CONTACT CELL HAVING THEREIN AN ANODE CONNECTED TO SAID SOURCE OF DIRECT CURRENT, SAID ALUMINUM HAVING AN ANODIZED OXIDE COATING FORMED THEREON BEFORE ENTERING SAID CELL THROUGH THE ACTION OF THE DIRECT CURRENT INTRODUCED IN THE CONTACT CELL ITSELF.
Claim 2
Dependent Claim
61 words
IN A PROCESS FOR CONTINUOUSLY ELECTROLYTICALLY ANODIZING ALUMINUM, THE IMPROVEMENT WHICH COMPRISES INTRODUCING ANODIZING DIRECT CURRENT INTO SAID ALUMINUM IN A CATHODIC CONTACT CELL HAVING THEREIN AN ANODE CONNECTED TO SAID SOURCE OF DIRECT CURRENT, SAID ALUMINUM HAVING AN ANODIZED OXIDE COATING FORMED THEREON BEFORE ENTERING SAID CELL THROUGH THE ACTION OF THE DIRECT CURRENT INTRODUCED IN THE CONTACT CELL ITSELF.
Claim 3
Dependent Claim
62 words
In a process for continuously electrolytically anodizing aluminum, the improvement which comprises introducing anodizing direct current from two or more sourcEs in a cathodic contact cell having therein anodes connected to said sources of direct current, the aluminum having an anodized oxide coating formed thereon before entering said cell through the action of the direct current introduced in the contact cell itself.
Claim 4
Dependent Claim
62 words
In a process for continuously electrolytically anodizing aluminum, the improvement which comprises introducing anodizing direct current from two or more sourcEs in a cathodic contact cell having therein anodes connected to said sources of direct current, the aluminum having an anodized oxide coating formed thereon before entering said cell through the action of the direct current introduced in the contact cell itself.
Claim 5
Dependent Claim
95 words
Process for continuously electrolytically anodizing aluminum web which comprises continuously passing said web through an anodizing cell having therein a cathode connected to a source of direct current, continuously passing said web from said anodizing cell into a cathodic contact cell having therein an anode connected to said source of direct current, and introducing anodizing direct current into said web in said contact cell, said web having an anodized oxide coating formed thereon in said anodizinc cell before entering said contact cell through the action of the direct current introduced in the contact cell itself.
Claim 6
Dependent Claim
95 words
Process for continuously electrolytically anodizing aluminum web which comprises continuously passing said web through an anodizing cell having therein a cathode connected to a source of direct current, continuously passing said web from said anodizing cell into a cathodic contact cell having therein an anode connected to said source of direct current, and introducing anodizing direct current into said web in said contact cell, said web having an anodized oxide coating formed thereon in said anodizinc cell before entering said contact cell through the action of the direct current introduced in the contact cell itself.
Claim 7
Dependent Claim
46 words
Process of claim 3 wherein said contact cell has a second anode connected to a second source of direct current and said web is continuously passed from said contact cell into a second cell having a cathode therein connected to said second source of direct current.
Claim 8
Dependent Claim
12 words
Process of claim 4 wherein said second cell is an anodizing cell.
Claim 9
Dependent Claim
14 words
Process of claim 4 wherein said second cell is a further electrolytic treatment cell.
Claim 10
Dependent Claim
25 words
Process of claim 3 wherein said aluminum strip is passed through at least two successive pairs of said anodizing cell followed by said contact cell.
Claim 11
Dependent Claim
89 words
Apparatus for continuously electrolytically anodizing aluminum web which comprises anodizing cell means containing a cathode connected to a source of direct current, cathodic contact cell means containing an anode connected to said source of direct current, and means for continuously passing said aluminum web first through said anodizing cell means and then through said contact cell means, the anodizing direct current entering said web in said contact cell means with an anodized oxide coating formed thereon through the action of the direct current introduced in the contact cell itself.
Claim 12
Dependent Claim
89 words
Apparatus for continuously electrolytically anodizing aluminum web which comprises anodizing cell means containing a cathode connected to a source of direct current, cathodic contact cell means containing an anode connected to said source of direct current, and means for continuously passing said aluminum web first through said anodizing cell means and then through said contact cell means, the anodizing direct current entering said web in said contact cell means with an anodized oxide coating formed thereon through the action of the direct current introduced in the contact cell itself.
Claim 13
Dependent Claim
63 words
Apparatus of claim 8 wherein said contact cell means contains a second anode connected to a second source of direct current and a second cell means are provided containing a cathode connected to said second source of direct current, said means for passing being adapted to continuously pass said web through said second anodizing cell means after passing through said contact cell means.
Claim 14
Dependent Claim
14 words
Apparatus of claim 9 wherein said second cell means is an anodizing cell means.
References Cited (Backward Citations)
US2541275A
Cited
US3471375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |