Patent US4400245A successfully refreshed from Google Patents.
US4400245A
Expired / Lapsed
US
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Matrixing process for the manufacture of molded records
Assignee: RCA Corp
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Filing: 1981-11-30
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Granted: 1983-08-23
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Expires: 2001-11-30
Abstract
Abstract A process improvement is disclosed for use in the matrixing process employed in the manufacture of molded records. In accordance with the disclosure, a narrow texturized band is provided in either the outer or inner unrecorded areas of a matrix or in both areas of a matrix, so that when a replica is electroformed on the matrix the texturized bands will provide sufficient additional grip of the replica to the matrix to prevent premature separation.
Inventors
- 👤 John J. Prusak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:13
CPC Classifications
C; C25; C25D; C25D1/00; C25D1/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
In the matrixing process employed in the manufacture of molded records in which a flat matrix having a surface comprised of a flat unrecorded bright metal circumferential outer-most zone, an adjacent intermediate recorded zone containing an information track, and an inner unrecorded bright metal zone is electroformed with a metal on said surface to form a replica thereon: the improvement which comprises: texturizing a circumferential portion of at least one of the unrecorded bright metal zones to provide a circular texturized band of sufficient roughness to prevent premature separation of the replica from the surface of the matrix.
Claim 2
Dependent Claim
98 words
In the matrixing process employed in the manufacture of molded records in which a flat matrix having a surface comprised of a flat unrecorded bright metal circumferential outer-most zone, an adjacent intermediate recorded zone containing an information track, and an inner unrecorded bright metal zone is electroformed with a metal on said surface to form a replica thereon: the improvement which comprises: texturizing a circumferential portion of at least one of the unrecorded bright metal zones to provide a circular texturized band of sufficient roughness to prevent premature separation of the replica from the surface of the matrix.
Claim 3
Dependent Claim
26 words
The improvement according to claim 1 wherein the texturized band is of sufficient roughness to be observed on the bright metal zone with the unassisted eye.
Claim 4
Dependent Claim
17 words
The improvement according to claim 1 wherein the texturized band is applied in the flat outer-most zone.
Claim 5
Dependent Claim
18 words
The improvement according to claim 1 wherein texturized bands are applied in both the inner and outer-most zones.
Claim 6
Dependent Claim
20 words
The improvement according to claim 1 wherein the texturized band is about 1/8 of an inch (3.175 mm) in width.
Claim 7
Dependent Claim
29 words
The improvement according to claim 1 wherein the texturized band is applied in an area outside of the molding area of a stamper to be derived from the replica.
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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |