US PATENT SUBCLASS 234 / 62
.~ With repeated sensing of same pattern field

Current as of: June, 1999
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234 /   HD   SELECTIVE CUTTING (E.G., PUNCHING)

59  DF  WITH MEANS TO INITIATE TOOL SELECTION BY SENSING PATTERN INDICIA OR CONFIGURED MACHINE ELEMENT {11}
62.~ With repeated sensing of same pattern field

DEFINITION

Classification: 234/62

(under subclass 59) Device including means for causing said sensing means to act a plurality of times in succession with respect to a given portion of said pattern, or wherein plural sensing means are provided and so arranged that two or more sensing means act successively with respect to a given portion of said pattern, during operations on one workpiece.