Process of preparing prototypes of embossed sheets
United States Patent 2988838

Inventors:
Sidney, Morgan John
Publication Date:
06/20/1961
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Assignee:
Eastern, Engraving And Machine
Primary Class:
101/32
Other Classes:
216/36, 72/207, 72/184
International Classes:
B41C3/00
US Patent References:
2587439Making ready cylindrical printing plate
2606855Plate or die for pressing or molding
2762036Method of monitoring etching depth