Package vacuum sealing fork - spikes contents for short path high rate evacuation reducing disturbance of contents

摘要

Prior to vacuum sealing, a container's contents are holed with a multipronged fork. Shorter air paths through the contents, and less resistance, reduce contents' disturbance and fouling of the packing sealing faces, which occur with a rapid pressure reduction procedure. A filled liner and outer carton lie under a piston rod operated fork. The descending prongs form deaerating holes in the filling. spiking within the evacuating chamber obviates the transport risk of hole wall collapse.