Minting process for producing a two color coin or medal

Details Minting process for producing a two color coin or medal Minting process for producing a two color coin or medal

2000-08-15

2004-04-20

Vidovich, Gregory (Department: 3726)

Metal working

Method of mechanical manufacture

Assembling or joining

C040S027500

Reexamination Certificate

active

06722012

ABSTRACT:

STATE-OF-THE-ART
So far, the technology used for producing bi-metallic (or bi-colored) coins, hereafter named bi-metallic ring technology, has consisted on the utilization of an inner disk (center) and an outside ring of different materials, generally with different colors.
The coins are produced in two stages: firstly the center is placed inside the outer ring with a little clearance, and secondly the two parts are assembled together with the impartion of the surface details by the minting dies (FIG.
1
). In the last years, several technical solutions for ensuring the mechanical joint between the inner disk and outside ring, have been developed by the producers of disk blanks, manufacturers of presses as well as by the mint houses.
More recently, a new type of bi-metallic collection coin has been presented, in which the bi-colored effect is achieved by mounting a small foil over a limited zone of the surface of a disk blank.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is an exploded sectional view of a two part prior art medal or coin.
FIG. 2
is an exploded sectional view of two different blanks used in the formation of medals or coins of the present invention.
FIG. 3
is an exploded view, partially in section, of a die set performing the preforming step of the present invention on a medal or coin.
FIG. 4
is an exploded view, partially in section, of a rimming die set performing the rimming step of the present invention on a medal or coin.
FIG. 5
is a sectional view of two medals or coins, one before and the other after the joining step of the present invention.
FIG. 6
is an exploded view, partially in section, of a die set performing the imprinting step of the present invention.


REFERENCES:
patent: 29652 (1860-08-01), Maltby
patent: 31871 (1861-04-01), Copeley
patent: 3607147 (1971-09-01), Harrison
patent: 3636616 (1972-01-01), Remning
patent: 4063346 (1977-12-01), Simpson et al.
patent: 4435911 (1984-03-01), Jones
patent: 4472891 (1984-09-01), Ielpo
patent: 4973524 (1990-11-01), Huebner et al.
patent: 5094922 (1992-03-01), Ielpo et al.
patent: 5630288 (1997-05-01), Lasset et al.
patent: 6514374 (2003-02-01), Zurawski et al.
patent: 1276272 (1972-06-01), None
patent: 1483700 (1977-08-01), None

Affiliated with

Also associated with

Rating

Minting process for producing a two color coin or medal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Minting process for producing a two color coin or medal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Minting process for producing a two color coin or medal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3243258