Patent US3706650A successfully refreshed from Google Patents.
US3706650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contour activating device
Assignee: Saint Gobain Abrasives Inc
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Filing: 1971-03-26
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Granted: 1972-12-19
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Expires: 1991-03-26
Abstract
Abstract A rotatable activating device for contacting and activating a contoured surface during the electrodeposition thereon of a metal coating. The device has an outer surface composed of a nonconductive, porous, compressible, fluid-entrapping and circulating, fixed hard particle-supporting media contoured to complement the contours of the surface to be activated and an internal complete or partial core of a conductive material.
Inventors
- 👤 Steve Eisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:27
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/22; C25D5/60; C25D5/605; C25D5/611; C25D5/627
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
A rotatable activating device having a complementary contoured outer surface adapted to be placed in contacting relationship with a contoured metallic work surface to be electroplated, said outer surface comprising a layer of a porous, flexible, compressible, non-conductive fluid-entrapping and circulating material having a plurality of spaced hard nonconductive particles secured in fixed relationship on at least the outer surface of such material; and an inert anode material so disposed and arranged within said outer surface of said rotatable activating device as to provide a substantially uniform current density at the surface of at least the central portion of said contoured work surface when said rotatable device is in contact with said contoured work surface and when said work surface is made cathodic with respect to said inert anode.
Claim 2
Dependent Claim
129 words
A rotatable activating device having a complementary contoured outer surface adapted to be placed in contacting relationship with a contoured metallic work surface to be electroplated, said outer surface comprising a layer of a porous, flexible, compressible, non-conductive fluid-entrapping and circulating material having a plurality of spaced hard nonconductive particles secured in fixed relationship on at least the outer surface of such material; and an inert anode material so disposed and arranged within said outer surface of said rotatable activating device as to provide a substantially uniform current density at the surface of at least the central portion of said contoured work surface when said rotatable device is in contact with said contoured work surface and when said work surface is made cathodic with respect to said inert anode.
Claim 3
Dependent Claim
52 words
A rotatable activating device as in claim 1 wherein said inert anode material comprises an inner shell of lesser diameter at any given point than that of said outer surface at the same point and is spaced substantially equi-distant from said outer surface over substantially the entire length of said rotative device.
Claim 4
Dependent Claim
49 words
A rotatable activating device as in claim 1 wherein said outer surface is provided by a plurality of discs of such porous, flexible, compressible, non-conductive fluid-entrapping and circulating material mounted concentrically on a supporting shaft with the outer peripheral portions of such discs in engagement one with the other.
Claim 5
Dependent Claim
51 words
A rotatable activating device as in claim 3 wherein said inert anode material is provided in the form of discs concentrically mounted on said shaft between adjacent discs of said fluid-entrapping and circulating material, said discs of anode material having a lesser diameter than said discs of fluid-entrapping and circulating material.
Claim 6
Dependent Claim
95 words
A rotatable activating device as in claim 1 wherein said inert anode material is so disposed and arranged that when said work surface is made cathodic with respect to said inert anode material, the current density at the surface of the contoured workpiece has a gradient at at least one end of said rotative device from said uniform current density down to a current density which is less than that which will produce a burnt electrodeposit on that surface of such workpiece immediately adjacent and free from contact with said end of said rotative device.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |