Patent ID: 7892946

Claim:
A device for cutting an assembly having two layers of material and a weakened interface there between, wherein the weakened interface defines an interface ring about the periphery of the assembly, comprising: a housing adapted for accepting the assembly; at least one blade without a fluid supply means for attacking the assembly at the interface ring; and at least one further element that cooperates with the blade and interface ring to facilitate cutting of the assembly; wherein the further element comprises a first seal element for establishing a high-pressure zone between the housing and the assembly at the level of the interface ring, and for establishing a first low-pressure zone at a first surface of the assembly; and a second seal element for further defining the high pressure zone between the housing and the assembly, and for establishing a second low-pressure zone at a second surface of the assembly; wherein cutting is facilitated by controlling the pressure in at least one of the high pressure and the low pressure zones.