US 4,840,270 AGranted

Re-sealable label flap

AssigneeNice-Pak Products, Inc.

InventorsGarry L. Caputo, Thomas A. Saldarelli, William E. Dwan

Life of this patent

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Abstract

A method for producing a label stopping area on a semirigid or flexible package having a package portion with an opening and a label flap which covers the opening. The label stopping area is such that the label flap can be lifted away from the package opening but not completely removed from the package body. The method involves treating a specific area of the package body's surface with a corona discharge so that the adhesion characteristics of the treated areas are improved. After the application of a pressure sensitive label flap, the label flap can be peeled easily up to the corona treated zone whereafter the label flap adhesion is substantially greater, thereby preventing inadvertent complete removal of the label flap from the package when opening.

Claims5

Dependent claims

A package having an opening and a resealable label flap for sealing the opening, said package comprising:

an enclosure portion for housing contents, said enclosure having a first sealing surface;
an opening in said enclosure for accessing said contents;
a label flap having a second sealing surface for selectively sealing said enclosure portion by covering said opening;
a roughened area located on said first or second sealing surface, said area formed by a corona discharge and providing a surface capable of bonding to a pressure sensitive, non-thermal adhesive more strongly than the area of said sealing surface not treated by corona discharge;
and
an adhesive applied between said label flap and said enclosure for adhering said first sealing surface to said second sealing surface such that said opening can be sealed by said label flap, said flap being secured to said enclosure by the stronger bond created within said roughened area of said sealing surface, said roughened area, with said adhesive, functioning as a label stop.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/135,940Filed 21 Dec 1987
Granted: 20 Jun 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

B65D 75/5894
Opening or contents-removing devices added or incorporated during package manufacture: preformed openings provided in a wall portion and covered…
B29C 59/10
Surface shaping of articles, e.g. embossing; Apparatus therefor: by electric discharge treatment
B29C 65/4825
Non-reactive adhesives, e.g. physically hardening adhesives: pressure sensitive adhesives
B29C 66/028
Preparation of the material, in the area to be joined, prior to joining or welding: non-mechanical surface pre-treatments, i.e. by flame…