(under the class definition) Apparatus in which the cover
material prior to its fabrication into a package or package element, is subjected to a means which causes some transient change in a physical or a chemical property of the cover material to modify its work-ability during packaging.
(1) Note. Heating or cooling of the cover material and/or closure elements to improve the holding, shaping or adhering qualities are here classified.
SEE OR SEARCH THIS CLASS, SUBCLASS:
128.1+, for apparatus which adds some abiding feature to the cover material.
373.7, for apparatus for heating or cooling an out turned seam of the cover material and see the notes thereto for other heating or cooling of the cover material.
