Patent ID: 7125247

Claim:
A three level stack mold molding machine having a fixed platen, a movable platen, two carriage assemblies and a pair of linkage assemblies for opening and closing said mold, each said linkage assembly comprising: a first arm pivotally connected to a first central pivot point on a first one of said carriage assemblies; a second arm pivotally connected to a second central pivot point on the other of said carriage assemblies; a third arm pivotally connected to said fixed platen at one end and to a first end of said first arm at another end; a fourth arm pivotally connected to said movable platen at one end and to a first end of said second arm at another end; a pair of arms extending between said first and second arms; and one of said third or fourth arm being connected to an upper end of one of said platens and the other of said third or fourth arm being connected to a lower end of the other of said platens and a first of said pair of arms extending between a second end of said first arm and said second central pivot point and a second of said pair of arms extending between a second end of said second arm and said first central pivot point, wherein said pair of arms and said first and second arm surround an opening between mold faces of a central moldset when said mold is open and said third arm and said fourth arm extend across a moldset in a position below or above mold faces of moldsets on either side of said central moldset to facilitate access to said mold faces when said mold is open.