Patent ID: 7338283
Filing Date: 2008-03-04
Classification: A61C

Abstract:
1. A device for detaching a break-away panel part of a dental model molding tray from a hollow body part of said tray which encloses said break-away panel, said break-away panel being located between upper and lower surfaces of said body of said molding tray and being joined by frangible members to horizontally aligned flange walls which protrude inwardly towards said panel from inner sides of a peripheral wall of said hollow tray body, said device including; a. a template comprising a body which includes, b. force exerting means for exerting a downwardly directed force on at least a first abutment flange which protrudes outwardly from said tray body relative to said template, whereby a reaction force is exerted upwardly on said break-away panel relative to said tray body sufficient to break said frangible members joining said break-away panel to said flanges, said force exerting means including a knock-out tool which has a plurality of at least three circumferentially spaced apart, downwardly protruding lower abutment flange-contacting members for contacting an upper surface of said abutment flange of said tray, and an upper anvil surface rigidly coupled to said flange-contacting members and adapted to receive a downwardly directed impact.