The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1981
Filed:
Nov. 05, 1979
Albert J Sarka, Fairview Park, OH (US);
Other;
Abstract
The disclosure relates to a method of making a pair of die plates having raised lands which cooperate to cut or crease material pressed between them. A line drawing of the desired pattern of cuts and creases is converted to coded information which is fed to the memory of an automatic machine tool. The automatic machine tool then produces a master image of the pattern of cuts and creases by selectively removing an opaque layer from a light transmitting substrate. The width of the lines on the master image are controlled according to whether cuts or creases are to be made, the height of the lands to be formed and the chemical properties of the material of which the die plates are to be formed. The master image is used to control chemical etching of the die plates, and thereafter the automatic machine tool, controlled by the same coded information, forms the desired profile for the lands. In addition, special machining is performed where cutting lands intersect each other.