Patent US5094922A successfully refreshed from Google Patents.
US5094922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bimetallic coin blank, particularly for coins and the like
Assignee: ISTITUTO POLIGRAFICO E Z ECCA DELLOSTATO
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Filing: 1990-08-27
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Granted: 1992-03-10
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Expires: 2010-08-27
Abstract
Abstract A coin blank, particularly for minting of coins and the like, is formed by an external element of metal or metal alloy having a central aperture, on the edge surface of which are cut perimetrally a series of spaced grooves, and by an internal element, of metal or metal alloy different from the former, on the edge surface of which is formed a perimetral ridge, said external and internal elements being coupled inseparably during the minting operation through the plastic flow of the material from said perimetral ridge into said grooves in said external element and through the firm fitting of the material from said ridge into the portions of the edge surface of said central aperture in said external element, provided between adjacent grooves.
Inventors
- 👤 Nicola Ielpo
- 👤 Piero Patarini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:02
CPC Classifications
B; B21; B21K; B21K25/00; A; A44; A44C; A44C21/00; B44; B44B; B44B5/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12229; Y10T428/12236; Y10T428/12243; Y10T428/12451
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
A bimetallic coin bank for coins comprising: an external element having a central aperture made of a first metal or metal alloy; and an internal element made of a second metal or metal alloy different from the first, the contour of which is the same as the contour of said central aperture of said external element; said bimetallic coin blank being characterized by the fact that said external element has an edge delimiting said central aperture in which are cut a series of perimetrally spaced grooves to allow material of said internal element to plastically flow into them following a compression operation on said external element when coupled.
Claim 2
Dependent Claim
108 words
A bimetallic coin bank for coins comprising: an external element having a central aperture made of a first metal or metal alloy; and an internal element made of a second metal or metal alloy different from the first, the contour of which is the same as the contour of said central aperture of said external element; said bimetallic coin blank being characterized by the fact that said external element has an edge delimiting said central aperture in which are cut a series of perimetrally spaced grooves to allow material of said internal element to plastically flow into them following a compression operation on said external element when coupled.
Claim 3
Dependent Claim
73 words
Bimetallic coin blank according to claim 1, wherein, on the surface of the edge of said internal element is a perimetral ridge so that, following said compression operation on said coupled internal and external elements, the material from portions of said ridge which are in correspondence with those of said grooves flows plastically into said grooves, while material from remaining portions of said ridge is firmly fitted into portions provided between adjacent grooves.
Claim 4
Dependent Claim
22 words
Bimetallic coin blank according to claim 1, in which said external element and said internal element each have thickened external perimetral edges.
Claim 5
Dependent Claim
33 words
Bimetallic coin blank according to claim 1, in which said compression operation on said coupled internal and external elements is performed during a minting step said bimetallic coin blank in a coin press.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |