.~ Skin packaging (e.g., vacuum forming by conforming cover over contents)
DEFINITION
Classification: 53/427
Skin packaging (e.g., vacuum forming by conforming cover over contents):
(under subclass 396) Methods for enclosing contents in sheet material to form a skinlike covering, e.g., by fluid pressure, into tight conforming engagement with a contents material placed on a base and securing the covering sheet to the base to complete the package.
(1) Note. The medium for applying force to the covering is usually vacuum but is not limited thereto for this subclass.
(2) Note. If the base or covering sheet is formed with a product-retaining recess prior to association with the contents, the patent is excluded from this subclass.
(3) Note. Incidentally subjecting the contents to vacuum as the covering is applied will not preclude classification into
this subclass.
(4) Note. The base may comprise a card, blank, web, or sheet material and may be different from, or the same as, the covering material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
433, for methods of forming a receptacle and subjecting contents therein to vacuum or gaseous medium. 453, for methods of forming receptacles by applying heat and pressure.
