Method and apparatus for producing a sealed package capable...

Details Method and apparatus for producing a sealed package capable... Method and apparatus for producing a sealed package capable...

B - Operations, Transporting

65

B

B65B 31/04 (2006.01) B65B 7/28 (2006.01) B65B 31/02 (2006.01)

Patent

CA 2081079

ABSTRACT OF THE DISCLOSURE A process for forming a sealed package of the type comprising a rigid tray-like container having an opening at its top leading to the container interior and carrying a product such as food or the like requiring isolation from atmospheric conditions for a substantial time, the process including the steps of applying to each container a planar sheet of lid material, positioning each container in a forming chamber with the lid clamped along a peripheral line thereof, establishing a differential pressure across the lid material to stretch the material away from the container into a smoothly-curved arc as seen in cross- section, increasing the pressure above said container to force the lid material down from its arc-shaped config- uration into the interior of said container and into close intimate pressure contact with the upper surface of the product.

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