Rotary die cutting
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United States of America Patent
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Sep 2, 1986
Grant Date -
N/A
app pub date -
Mar 14, 1984
filing date -
Mar 14, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pair of rotary dies with lands having coacting cutting edges which cut blanks of material from a web passing between the rotating dies. To provide a clean cut and improved squareness of the cut ends, a side face of the land adjacent the cutting edge has a positive rake. To insure that the cutting edges can be brought into coacting relationship to produce a clean cut, they are located and arranged on the dies so that they can be varied and adjusted axially and in rotary phase relationship to each other. A die stand for positioning, adjusting and driving the rotary dies, and a method for making negative electrode cylinders for producing the rotary dies by hardening, grinding and electric discharge machining blank cylinders of tool steel, are also disclosed.
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