Monday, April 2, 2012

U.S. Patent 3,769,379

This machine revolutionized the sheer quantity of plastic bags that could be produced. The plastic film that is used is made through a series of heating and cooling liquid plastic. Once the machine has prepared the liquid plastic to be processed it is blown through various dyes, heated during the blown extrusion then cooled and rolled into film. (U.S. Patent 3,769,379)

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