US PATENT SUBCLASS 79 / 11
.~.~.~ Axially opposite

Current as of: June, 1999
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79 /   HD   BUTTON MAKING

*  DD  PEARL AND COMPOSITION {4}
*  DD  .~ Drilling {2}
*  DD  .~.~ Multiple spindle {1}
11.~.~.~ Axially opposite

DEFINITION

Classification: 79/11

Machines for drilling buttons in which the button-blank is held in a clamp between axially aligned drills or pairs of drills which cut toward each other from opposite sides of the work.