Patent ID: 8079395
Filing Date: 2011-12-20
Classification: B65H,Y10T

Abstract:
1. A quick change knife blade assembly, comprising: a mounting plate; a knife blade mounted upon said mounting plate; said knife blade being provided with a pair of key-hole shaped slots having first relatively enlarged circular portions and second relatively narrow slot portions; a pin plate having a pair of axially extending pins fixedly mounted in an integral manner thereon wherein said pins have first relatively large diametrical portions and second relatively small diametrical portions such that when said pin plate, and said pair of axially extending pins fixedly mounted thereon, is disposed at a first axial position with respect to said mounting plate, said first relatively large diametrical portions of said pair of pins will be disposed within said first relatively enlarged circular portions of said knife blade so as to prevent said first relatively large diametrical portions of said pair of pins from moving through said second relatively narrow slot portions of said key-hole shaped slots of said knife blade whereby said knife blade is fixedly retained upon said mounting plate, whereas, when said pin plate, and said pair of axially extending pins fixedly mounted thereon, is axially moved to and disposed at a second axial position with respect to said mounting plate, said first relatively large diametrical portions of said pair of pins will be disengaged from said first relatively enlarged circular portions of said knife blade and said second relatively small diametrical portions of said pair of pins will be disposed within said first relatively enlarged circular portions of said knife blade so as to permit said second relatively small diametrical portions of said pair of pins to move through said second relatively narrow slot portions of said key-hole shaped slots of said knife blade whereby said knife blade can be removed from said mounting plate; and a pair of biasing springs disposed around said second relatively small diametrical portions of said pair of pins so as to be operatively interposed between said mounting plate and said pin plate for normally biasing said pin plate, and said pair of axially extending pins fixedly mounted thereon, to said first axial position with respect to said mounting plate at which said first relatively large diametrical portions of said pair of pins will be disposed within said first relatively enlarged circular portions of said knife blade so as to prevent said first relatively large diametrical portions of said pair of pins from moving through said second relatively narrow slot portions of said key-hole shaped slots of said knife blade such that said knife blade is fixedly retained upon said mounting plate, however, when said pin plate is depressed against the biasing force of said pair of biasing springs so as to axially move said pin plate, and said pair of pins mounted thereon, to said second axial position, said first relatively large diametrical portions of said pair of pins will be disengaged from said first relatively enlarged circular portions of said knife blade and said second relatively small diametrical portions of said pair of pins will be disposed within said first relatively enlarged circular portions of said knife blade so as to permit said second relatively small diametrical portions of said pair of pins to move through said second relatively narrow slot portions of said key-hole shaped slots of said knife blade whereby said knife blade can be removed from said mounting plate.