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AssigneeAmerican National Can Company
InventorsRichard Littmann, Ulrich Weingartner, Thomas S. Wildenberg, Jerry Jesse, Deane E. Galloway
Estimating the term…
An easy open tear control package, preferably a pouch, from a film of polymeric barrier material is disclosed. Methods and films for making of such packages are also disclosed. The easy open tear control feature arises from roughening portions of the outer or inner surface of the films, prior to fabricating into the package. The roughened portion is on one face or on each face of the package and is at least a full width of a seal when the film is made into the package. The roughened portion can extend the entire width of the package and can be of any desired length. A preferred film is a continuous extrusion laminated film comprising, a plurality of superimposed layers which comprise from outer surface to inner surface, a first layer of polyester, a second layer comprising a vinylidene chloride copolymer, preferably a vinylidene chloride methyl acrylate copolymer, a third layer of ink, a fourth layer of primer, a fifth layer of low density polyethylene, a sixth layer of ethylene vinyl acetate, and seventh and eighth layers each of an ionmer resin.
A hollow tube for making an easy open airtight tear control pouch comprising a polymeric continuous extrusion laminated, oriented barrier film, said tube having a first end and a second end, an outer surface and an inner surface and roughened circumferential area, or portion of a circumferential area, on at least one of said surfaces on at least one end of the tube, said roughening made either continuously or randomly in either the machine direction or cross machine direction, said area corresponding to at least a full width of a seal when said end is sealed to form a pouch, said polymeric barrier film comprising in order:
An easy open airtight tear control pouch comprising a sheet of a first polymeric continuous extrusion laminated, oriented barrier film structure sealed to a sheet of a second polymeric continuous extrusion laminated, oriented barrier film structure to form a pouch having a first outer surface and a second outer surface, said second outer surface being on the side opposite said first outer surface, said pouch having first and second inner surfaces on said first and second sheet structures respectively, in a face to face relationship, wherein at least one of said surfaces has a roughened area across at least the full width of at least one seal of said pouch, said roughening made either continuously or randomly in either the machine direction or cross machine direction, said roughened area substantially providing, in opening the pouch, the tear initiation and tear control, said first and second polymeric barrier film structures comprising in order:
An easy open airtight tear control pouch made by:
An easy open airtight tear control pouch made by:
Dependencies are inferred from the claim text.