Flexible packaging structure with a built-in opening and reclose feature

Patent metadata

Field	Value
Publication number	US-11338977-B2
Application number	US-201916678558-A
Country	US
Kind code	B2
Filing date	Nov 8, 2019
Priority date	Jun 11, 2004
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

The invention comprises, in an embodiment, a resealable packaging structure comprising a container having a bottom and at least one sidewall extending upwardly therefrom, wherein the sidewall terminates in a flange. A flexible resealable lid is sealed to the flange. The lid comprises a polyethylene terephthalate layer disposed adjacent the flange, a pressure sensitive adhesive layer disposed adjacent the polyethylene terephthalate layer, and an oriented polypropylene layer disposed adjacent the pressure sensitive adhesive layer. The polyethylene terephthalate layer comprises a laser scored line which penetrates through the thickness of the inner layer but not through the outer layer and defines an opening portion that can be lifted out of the plane of the inner layer, thereby creating an opening through the lid defined by the laser score line.

First claim

What is claimed is:

1. A resealable packaging structure for housing products wherein the entire packaging structure comprises a laminate comprising:
an outer oriented polypropylene layer and an inner polyethylene terephthalate layer that are coextensive across substantially their entire areas, each of the layers having an upper surface and a lower surface and wherein, other than in an unadhered tab portion of the outer layer, the outer layer lower surface is adhered to the inner layer upper surface over substantially their entire surfaces, the laminate further comprising a repeatedly openable and closeable flexible structure which comprises, prior to an initial opening:
a permanently adhered portion and a releasably adhered portion; and
a first score line in the laminate defining a laser-scored outer layer opening portion and a second score line in the laminate defining an inner layer opening portion wherein the outer layer opening portion is larger in area than the inner layer opening portion and extends beyond a periphery of the inner layer opening portion, and wherein the outer layer opening portion comprises the tab portion;

a non-detachable flap having a releasable perimeter that is resealable to the inner layer upper surface, the flap comprising the outer layer opening portion and the inner layer opening portion;
wherein the inner layer upper surface comprises a first marginal region in the releasably adhered portion of the laminate and surrounding the second laminate score line,
the outer layer lower surface comprising a second marginal region in the releasably adhered portion of the laminate that defines the releasable perimeter;
wherein the first marginal region of the inner layer is releasably adhered to the second marginal region so that the flap may be repeatedly opened to allow access to the products housed within the resealable packaging structure by releasing the first and second marginal regions and repeatedly closed to prevent access to and exposure of the products by sealing the first and second marginal regions.

2. The resealable packaging structure of claim 1 wherein the permanently adhered portion of the laminate comprises a permanent adhesive.

3. The resealable packaging structure of claim 1 wherein the releasably adhered portion comprises a pressure sensitive adhesive.

4. The resealable packaging structure of claim 1 wherein the first marginal region is in the form of a partial racetrack design.

Assignees

• Sonoco Dev Inc

Inventors

• Hebert Robert Charles
• Huffer Scott William
• Reese Barry Roland
• Prizzi John A

Classifications

• B65D77/2096

  Adhesive means · CPC title

• B31B70/81

  Forming or attaching accessories, e.g. opening devices, closures or tear strings · CPC title

• B29C2791/009

  Using laser · CPC title

• B31B70/74

  Auxiliary operations · CPC title

• B65D2577/2066

  Means on, or attached to, container flange facilitating opening, e.g. non-bonding region, cut-out · CPC title