US Patent No: 4,931,327

Number of patents in Portfolio can not be more than 2000

White opaque opp film for tamper evident package

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Importance

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Abstract

A tamper-evident film includes a hydrocarbon polymer core layer (a) having an upper face and a lower face; an oriented tamper-evident layer applied to at least the lower face of core layer (a), layer (b) being fabricated from a mixture of a polyolefin and a filler of particles which induce cavitation upon orientation, layer (b) having an internal cohesiveness which is less than the internal cohesiveness and bonding strength of packaging adhesives and heat seals; and, an oriented skin layer (c) applied to the upper face of core layer (a) if layer (b) has not been applied thereon, layer (c) being hydrocarbon polymer. A tamper-evident package seal and package are also provided.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
FL INDUSTRIES, INC., A CORP. OF N.J.NEW YORK, NY81
MOBIL OIL CORPORATIONNEW YORK, NY5053

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Heffelfinger, Michael T Westerville, OH 14 142
Liu, Leland L Fairport, NY 13 286
Whyman, Donald G Victor, NY 2 36

Cited Art

Patent Info (Count) # Cites Year
 
MOBIL OIL CORPORATION (5)
4,377,616 Lustrous satin appearing, opaque film compositions and method of preparing same 193 1981
4,582,736 Coextruded pressure sensitive label stock material with integral peelable backing 38 1985
4,632,869 Resin composition, opaque film and method of preparing same 113 1985
4,702,954 Polymer laminate possessing an intermediate water vapor transmission barrier layer 40 1985
4,701,370 Foamed, opaque, oriented polymeric film structure and process for its manufacture 26 1986
 
MINNESOTA MINING AND MANUFACTURING COMPANY (4)
4,557,505 Stress-opacifying tamper indicating tape 67 1984
4,652,473 Tamper-resistant packaging tape 44 1984
4,760,919 Tamper-indicating package 11 1987
4,876,123 Tamper indicating tape and delaminating film therefore 68 1988
 
CURWOOD, INC. (2)
4,509,196 Tamper-indicating self-sealing pouch 52 1983
4,510,621 Self-sealing pouch for forming adhesive-to-adhesive seal 36 1983
 
JOHN H. HARLAND COMPANY (1)
4,709,396 Tamper-evident envelope with indicia underlying cohesive layers 44 1985
 
KANZAKI SPECIALTY PAPERS, INC. (1)
4,488,646 Tamper-indicating sheet 54 1983
 
PECHINEY EMBALLAGE FLEXIBLE EUROPE (1)
4,429,015 Multi-ply laminae and identification card 68 1982

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
SARGENTO FOODS INC. (7)
6,360,513 Resealable bag for filling with food product(s) and method 80 1999
6,416,798 Packaging having protected information and method 0 2000
7,320,545 Resealable bag for filling with food product (s) and method 2 2002
7,165,887 Resealable bag for filling with food product(s) and method 3 2002
7,086,782 Resealable bag for filling with food products and method 4 2002
6,913,387 Resealable bag for filling with food product (s) and method 13 2002
6,910,806 Resealable bag for filling with food product(S) and method 16 2002
 
3M INNOVATIVE PROPERTIES COMPANY (3)
6,099,682 Cold seal package and method for making the same 26 1998
6,436,499 Cold seal package and method for making the same 10 2000
6,290,801 Cold seal package and method for making the same 6 2000
 
AMPAC TRIGON, LLC (2)
5,631,068 Self-containing tamper evident tape and label 21 1995
5,798,169 Self-containing tamper evident seal 17 1996
 
EXOPACK, LLC (2)
5,882,749 Easy-opening reclosable package 22 1997
5,882,789 Packaging material for forming an easy-opening reclosable packaging material and package 34 1997
 
KRAFT FOODS GLOBAL BRANDS LLC (2)
8,398,306 Flexible package with internal, resealable closure feature 0 2005
8,389,596 Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages 0 2011
 
MINNESOTA MINING AND MANUFACTURING COMPANY (2)
5,298,708 Microwave-active tape having a cured polyolefin pressure-sensitive adhesive layer 21 1991
5,428,209 Microwave-active tape having a cured polyolefin pressure-sensitive adhesive layer 18 1993
 
TREDEGAR FILM PRODUCTS CORPORATION (2)
5,277,971 Tamper-evident pressure sensitive facestock labels 16 1992
5,405,692 Tamper-evident pressure sensitive facestock labels 15 1994
 
AMPAC PLASTICS LLC (1)
6,196,716 Side seal tamper indicating bag 14 1999
 
BURROUGHS WELLCOME CO. (1)
5,495,944 Bottle with tamper evident wrapping 32 1994
 
E. I. DU PONT DE NEMOURS AND COMPANY (1)
5,516,583 Adhesive for tamper evident seals 19 1994
 
ICMA SAN GIORGIO S.P.A. (1)
6,221,288 Method of producing composite materials and stratiform composites 1 1997
 
ILLINOIS TOOL WORKS INC. (1)
7,213,305 Peel seal tamper evident slider bag 2 2003
 
KRAFT FOODS HOLDINGS, INC. (1)
5,103,979 Package having peel seal tamper-evidence message 36 1989
 
LUDLOW CORPORATION (1)
5,683,029 Combination sealing and opening strip for packages 7 1996
 
MOBIL OIL CORPORATION (1)
5,500,265 Peelable film structure 32 1993
 
OPSEC SECURITY GROUP, INC. (1)
5,137,208 Tamper evident package 7 1990
 
PWP INDUSTRIES (1)
7,913,870 Tamper evident container 0 2006
 
SONOCO DEVELOPMENT, INC. (1)
7,244,496 Tamper evident flow wrap 1 2004
 
TAGHLEEF INDUSTRIES INC. (1)
7,138,172 Metallizable white opaque films, metallized films made therefrom and labels made from the metallized films 0 2001
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
5,633,058 Message-indicating self-wound tape and method of making same 18 1995