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Coin with geometric pattern at edge and its preparing method

A technology of geometric shapes and coins, which is applied in the field of coins and their preparation to achieve the effect of enhancing anti-counterfeiting, improving production process and collection value, and improving ornamental value

Inactive Publication Date: 2007-04-11
CHINA BANKNOTE PRINTING & MINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of them involve the technology of printing geometric patterns on the sides of coins

Method used

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  • Coin with geometric pattern at edge and its preparing method
  • Coin with geometric pattern at edge and its preparing method
  • Coin with geometric pattern at edge and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] Referring to Fig. 3, the method for preparing coin 1 comprises the following specific steps:

[0020] ①, making the embossing mold set

[0021] Choose the smooth surface or silk tooth surface embossing mold cover blank with the same size and shape as the coin to make the set pattern electrode 9, install the pattern electrode 9 on the electric discharge machine tool 10 and set the corner and moving step of the pattern electrode 9 Long; position and fix the smooth or silk-tooth surface embossing mold cover blank with the workbench, the pattern electrode 9 is aligned with the inner processing surface 11 of the smooth or silk-tooth surface embossing mold cover blank, and start the electric discharge machine 10, The patterned electrode 9 carries out electric discharge machining on the inner processing surface 11 of the imprinting mold cover blank on the smooth surface or the silk tooth surface, and the pattern electrode 9 rotates along the smooth surface or the silk tooth su...

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PUM

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Abstract

The invention discloses a hard coin with edge part having geometric figure, characterized by side part of coin podium without said geometric figure, said figure height is same with coin thickness or thinner then thereto thickness; said coin is in the shape of circular, polygon or any there of; said geometric figure comprising shape of arc, ladder-shaped, triangular, hackle-shaped or mixture of them.

Description

technical field [0001] The invention relates to the technical field of minting coins, in particular to a coin with a geometric pattern on the edge and a preparation method thereof. Background technique [0002] At present, the edges of coins, commemorative coins, and medals in various countries in the world are all silk teeth (half teeth) or a single pattern of smooth surface. After retrieval, the Chinese patent: "Interrupted half-teeth on the edge of coins and commemorative medals and printing method" (CN200310119463.1) relates to the processing method of half-teeth silk teeth and mold splits. Foreign patents: (FR2735074) relate to a coin bonded with different metal materials; (EP0415892) relate to the connection mode between the inner core of a bimetallic coin and the intermittent groove rolled by the outer ring. None of them relate to the technology of printing geometric patterns on the sides of coins. Contents of the invention [0003] The object of the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A44C21/00
Inventor 周建栋陈斌
Owner CHINA BANKNOTE PRINTING & MINTING
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