MANUFACTURE TECHNIQUE OF METAL COPIES OF POST STAMPS Russian patent published in 1995 - IPC

FIELD: copies manufacturing technique. SUBSTANCE: thin metal sheet workpieces having peripheral allowance for treatment are subjected to finishing and strengthening treatment and then forged through a soft metal washer by a flat block head. Before and after forging, the workpiece is covered with corrosion-proof decorative coating made of non-ferrous, noble metals and alloys and chemical compounds. The copy obtained is also covered with protective coating. EFFECT: higher efficiency and reliability. 2 cl, 2 dwg