US3636616A

US3636616A - Method for manufacturing coins

Info

Publication number: US3636616A
Application number: US868406A
Authority: US
Inventors: Ake Gustav Vilhelm Remning
Original assignee: Svenska Metallverken AB
Current assignee: Svenska Metallverken AB
Priority date: 1968-10-24
Filing date: 1969-10-22
Publication date: 1972-01-25
Anticipated expiration: 1989-01-25
Also published as: NO123482B; FI52016B; DE1952929C3; DE1952929A1; DK121681B; SE317305B; ES372422A1; DE1952929B2; GB1233279A; FI52016C; FR2021480A1; NL6915548A

Abstract

A method in the manufacture of coins, medals and like objects from plated material, the method including the steps of forming from the plated material discs having an extension which exceeds the extension of the blanks used in the embossing operation, recessing the peripheral edge surface of each disc so that the outer layer of the disc projects beyond the central layer thereof, folding the outwardly projecting portions of the outer layers of each disc toward each other, the recess being made sufficiently large so that the said inwardly folded portions at least approximately reach each other, and embossing the resulting blanks to form coins or like objects.

Description

United States Patent Remning [451 Jan. 25, 1972 [72] Inventor: Ake Gustav Vilhelm Remning, Finspang,

Sweden [73] Assignee: Aktiebolaget Svenska Metallverken,

Vasteras, Sweden [22] Filed: Oct. 22, 1969 [211 Appl. No.: 868,406

[30] Foreign Application Priority Data Oct. 24, 1968 Sweden ..14388/68 [52] US. Cl ..29/557, 29/1606, 29/194, 40/27.5, 63/23 [51] Int. Cl ..B23p 13/04 [58] Field ofSearch ..29/557, 160.6, 194; 63/23, 63/2; 40/275; 72/341, 324

[56] References Cited UNITED STATES PATENTS 1,093,698 4/1914 Heaton ..29/1606 1,143,696 6/1915 Finckh ..29/l60.6 X

1,863,618 6/1932 Brogan 29/160 6 2,050,154 8/1936 Beckm. .....40/27 5 2,050,253 8/1936 Bager 29/1606 X 2,056,675 10/1936 Kellogg ..29/509 OTHER PUBLICATlONS T6r, Defensive Publication published in 860 0.0. 1008 on March 25,1969, 29- 194 Primary Examiner-John F. Campbell Assistant Examiner-Victor A. DiPalma AttorneyWaters, Roditi, Schwartz & Nissen [57] ABSTRACT A method in the manufacture of coins, medals and like objects from plated material, the method including the steps of forming from the plated material discs having an extension which exceeds the extension of the blanks used in the embossing operation, recessing the peripheral edge surface of each disc so that the outer layer of the disc projects beyond the central layer thereof, folding the outwardly projecting portions of the outer layers of each disc toward each other, the recess being made sufficiently large so that the said inwardly folded portions at least approximately reach each other, and embossing the resulting blanks to form coins or like objects.

4 Claims, 2 Drawing Figures {Mull/11111111111111),

METHOD FOR MANUFACTURING COINS The present invention relates to a method for manufacturing coins or like objects of plated material.

It has previously been suggested in the manufacture of medals and the like objects to emboss flat blanks composed of outer layers of a more expensive or noble material and an intermediate layer of a less expensive or less noble material. The intermediate layer, however, shows through at the periphery of the medal or like object, which is often a disadvantage with respect to the appearance of the object, for example.

The object of the present invention is to provide a novel and improved method for manufacturing in preference coins, by means of which coins or the like which satisfy the high demands placed on the appearance of said coins can be manufactured in a simple and economic manner despite the use of relatively inexpensive starting material. To these ends it is suggested in accordance with the invention when manufacturing coins or the like to produce discs of plated material with an extension exceeding the extension of the blanks used in the embossing operation, to recess the discs around the in peripheral edge surfaces, so that the outer layers of the composite disc project beyond the central layer thereof, and to fold in the projecting portions of the external layers of each disc towards each other, the recess being made sufficiently large so that the inwardly folded portions at least approximately reach each other, and to emboss the resulting blanks to produce coins or like objects. The invention also relates to coins or like objects manufactured in accordance to the new method.

The invention will now be described in more detail with reference to the accompanying drawing, further characteristic features of the invention being shown and described in conjunction therewith. In the drawing, FIG. 1 shows diagrammatically the various stages in manufacturing a coin in accordance with the invention, and FIG. 2 shows a perspective view of a coin manufactured in accordance with the invention and from which a sector-shaped portion has been cut away.

in FIG. 1 the reference numeral shows in cross section a portion of plated material in the form of a disc or strip and having two outer layers 11, comprising for example a copper alloy embodying percent Ni and an intermediate layer 12, comprising for instance a copper alloy embodying 3 percent Ni. A disc 14 is formed from this material, for example by punching along the lines 13. In accordance with the invention the disc 14 has an extension which exceeds that of the blank used in the embossing operation, while the outer contours of the disc are suitably adapted to the outer contours of the coin or like article to be manufactured, e.g., being circular for a circular coin or hexagonal for an hexagonal coin etc.

The peripheral edge surface 15 of the disc 14 is then recessed, as shown at 16, so that the outer layers 11 of the disc 14 project beyond the central layer 12 thereof, to form projecting portions 17. Particularly when manufacturing circular coins or like objects, it is suitable to form the recess 16 by turning the disc in a lathe, wherewith the circuit disc can be rotated relative to a stationary lathe tool or the like. It is obvious that such a turning operation can easily be carried out fully automatically, thus keeping the cost of manufacturing said coins or like objects low.

in accordance with the invention, the portions 17 of each disc 14 are then folded in towards each other. The recess 16 is made sufficiently large to permit the folded-in portions to at least reach each other. Although it is quite possible within the scope of the invention that the folded portions either fall slightly short of each other or somewhat overlap each other, it is preferred that the portions 17 when folded in towards each other come into exact edge to edge contact. The portions 17 are suitably folded by means of automatically operating machines and folding can, to advantage, be effected in one or more working stages by bringing pressure rollers to bear against the portions 17 during rotation of the discs 14. The resulting blank 18 can be embossed in a conventional manner to form a coin l9 presenting a peripheral edge 20 which covers the material of the intermediate layer 12 and in which the oints between the portion 17 rs invisible, at least to the naked eye. The material of the

layers

11 and 12 will spread slightly during the embossing operation to fill out any cavities 21 remaining after folding the portions 17.

Although the recess 16 in FIG. 1 has been shown to have a semicircular cross section this is not restrictive to the invention. For instance, the recess 16 may have a V-shaped cross section or the shape of a frustated cone. in the manner illustrated, the recess at the surface 15 of the disc 14 can extend exactly to the outer layers. It is, however, also possible to make the recess so wide that a certain portion of the material of the outer layers 11 is removed, or to make the recess 16 so narrow that the portion 17 will also contain a portion of the material of the intermediate layer. Furthermore, it is also possible within the scope of the invention to cause the recess to be more or less eccentric, for example so that one portion 17 projects further than the other, and also that the disc 14 presents more than three layers. Other modifications can of course be made within the scope of the invention as it is defined in the following claims.

What is claimed is:

1. in a method of manufacturing coins and the like from composite material, the steps of continuously producing blanks including forming discs from the composite material, said discs each being a diameter larger than diameter of the desired finished coin, recessing the peripheral edge surface of each disc to provide peripherally extending portions on either side of the formed annular recess, bending said extending portions inwardly toward the recessed edge surface into edge-toedge contact with each other, and marking said blanks with markings appropriate for the coin and the like.

2. The method of claim 1, wherein the discs are punched from plated sheet or strip material.

3. The method of claim 1, wherein the recess is made in the discs by turning said disc on a lathe.

4. The method of claim 1, wherein said peripherally extending portions of the discs are folded in towards each other during rotation of said discs in one or more sequential steps by means of pressure rollers bearing against said portions.

Claims

1. In a method of manufacturing coins and the like from composite material, the steps of continuously producing blanks including forming discs from the composite material, said discs each being a diameter larger than diameter of the desired finished coin, recessing the peripheral edge surface of each disc to provide peripherally extending portions on either side of the formed annular recess, bending said extending portions inwardly toward the recessed edge surface into edge-to-edge contact with each other, and marking said blanks with markings appropriate for the coin and the like.