US PATENT SUBCLASS 53 / 509
SKIN PACKAGING
Current as of: June, 1999
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DEFINITION
Classification: 53/509
SKIN PACKAGING:
(under the class definition) Apparatus including means to enclose a contents between sheet material comprising a flat base sheet and a covering sheet in which the covering sheet is forced by fluid pressure, e.g., vacuum, into tight engagement with the contents and is secured at its free margins to the base sheet to form a thin, skinlike covering over the contents.
(1) Note. If the base sheet is formed with a product-retaining recess either before or during packaging, the patent is excluded from the subclass.
(2) Note. The fact that the contents may be subject to the effects of the fluid pressure which forces the cover sheet into engagement with the contents will not preclude
classification in this subclass unless an inert gaseous atmosphere is provided thereby.
SEE OR SEARCH THIS CLASS, SUBCLASS:
427, for corresponding methods.
511, for apparatus for forming a receptacle and subjecting contents thereof to a vacuum or inert gaseous atmosphere.
