Patent US3817172A successfully refreshed from Google Patents.
US3817172A
Expired / Lapsed
US
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Mesh heated die
Assignee: Letraset International Ltd
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Filing: 1971-11-16
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Granted: 1974-06-18
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Expires: 1991-11-16
Abstract
Abstract The invention concerns a die assembly for use in hot die and foil marking, comprising a cured silicone rubber die having a metal mesh heater element attached to its back, there being suitable current supply connections for the mesh.
Inventors
- 👤 D Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:27
CPC Classifications
B; B44; B44C; B44C3/00; B44C3/08; B44C3/085; B41; B41F; B41F19/00; B41F19/02; B41F19/06; B41F19/064; B41M; B41M5/00; B41M5/025; B41M5/035; B41M5/0358; B44C1/00; B44C1/24; H; H05; H05B; H05B3/00; H05B3/02; B41P; B41P2219/00; B41P2219/30; B41P2219/31
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
A die assembly which comprises a supporting base; a resilient cushion on said base; a die of resileint material; an electrically heatable flexible metal mesh attached in a heatconducting relationship to the rear side of said die, said metal mesh including end portions extending outwardly from said die of resilient material, the mesh being positioned between said die and the resilient cushion; means for securing the end portions of said mesh to said base, said securing means pulling said metal mesh against said cushion thereby exerting a compressive force on said cushion and creating tensile forces within said metal mesh; and means for connecting said end portions to a source of electric current to enable a flow of current through said mesh for heating said die.
Claim 2
Dependent Claim
126 words
A die assembly which comprises a supporting base; a resilient cushion on said base; a die of resileint material; an electrically heatable flexible metal mesh attached in a heatconducting relationship to the rear side of said die, said metal mesh including end portions extending outwardly from said die of resilient material, the mesh being positioned between said die and the resilient cushion; means for securing the end portions of said mesh to said base, said securing means pulling said metal mesh against said cushion thereby exerting a compressive force on said cushion and creating tensile forces within said metal mesh; and means for connecting said end portions to a source of electric current to enable a flow of current through said mesh for heating said die.
Claim 3
Dependent Claim
16 words
A die assembly according to claim 1, wherein the die is formed of cured silicone rubber.
Claim 4
Dependent Claim
26 words
A die assembly according to claim 2, wherein said metal mesh is made of steel and said die comprises silicone rubber cast on said steel mesh.
Claim 5
Dependent Claim
16 words
A die assembly according to claim 2, wherein the die is 0.75 to 3 mm thick.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |