CA2239514A1 - Method of making bi-metallic coins or blanks - Google Patents
Method of making bi-metallic coins or blanksInfo
- Publication number
- CA2239514A1 CA2239514A1 CA002239514A CA2239514A CA2239514A1 CA 2239514 A1 CA2239514 A1 CA 2239514A1 CA 002239514 A CA002239514 A CA 002239514A CA 2239514 A CA2239514 A CA 2239514A CA 2239514 A1 CA2239514 A1 CA 2239514A1
- Authority
- CA
- Canada
- Prior art keywords
- core
- outer member
- shaped
- radially outwardly
- metal alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 abstract 3
- 239000000956 alloy Substances 0.000 abstract 2
- 229910001092 metal group alloy Inorganic materials 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C21/00—Coins; Emergency money; Beer or gambling coins or tokens, or the like
Landscapes
- Adornments (AREA)
Abstract
A bi-metallic coin or blank is produced from a disc-shaped core and an annular outer component. The metal alloy material of the core is relatively harder than the metal alloy material of the outer member. The two components are bonded to each other by pressure flow of the material of the core toward and into the inner edge of the outer member. According to the invention, the peripheral edge of the core is shaped or nosed such that it extends radially outwardly. During minting, the pressure of the dies causes the material of the core to flow radially outwardly, thus causing the shaped peripheral edge of the core to penetrate into the softer material of the outer members's inner edge and, thereby, form a tongue and groove connection which resists relative axial and rotational movement between the outer member and the core. The shaping of the core also facilitates the fast speed placement of the core into the ring during the minting operation. The invention is particularly, but not exclusively, useful in the production of thin coins having the thickness range of about 1.0 mm to about 1.5 mm, where the locking of the two components is difficult to achieve with known methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002239514A CA2239514C (en) | 1995-12-05 | 1996-12-04 | Method of making bi-metallic coins or blanks |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002164495A CA2164495A1 (en) | 1995-12-05 | 1995-12-05 | Bi-metallic coin |
| CA2,164,495 | 1995-12-05 | ||
| CA002239514A CA2239514C (en) | 1995-12-05 | 1996-12-04 | Method of making bi-metallic coins or blanks |
| PCT/CA1996/000800 WO1997020701A1 (en) | 1995-12-05 | 1996-12-04 | Method of making bi-metallic coins or blanks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2239514A1 true CA2239514A1 (en) | 1997-06-12 |
| CA2239514C CA2239514C (en) | 2004-02-17 |
Family
ID=25678248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002239514A Expired - Lifetime CA2239514C (en) | 1995-12-05 | 1996-12-04 | Method of making bi-metallic coins or blanks |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2239514C (en) |
-
1996
- 1996-12-04 CA CA002239514A patent/CA2239514C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2239514C (en) | 2004-02-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20161205 |