Patent ID: 6629483
Filing Date: 2003-10-07
Classification: B09B,Y10T

Abstract:
A hole-forming device, comprising:a case fittable to a bottom portion of a can receptacle; a base member accommodated in said case, said base member slidable along a longitudinal direction of said case; a hole-forming projection being formed on an upper surface of said base member; a retaining member disposed between a wall of said case and said base member so that said hole forming projection is normally accommodated in said case; and a pressing member placed under said base member; said base member having a pressured slope as a lower end surface thereof; said pressing member having a pressing slope as an upper end surface thereof; said pressing slope contacting with said pressured slope; and a lower part of said pressing member protruding from a lower end of said case by circumferential rotation of said pressing member; wherein said retaining member is a coiled spring.