Back to results
US 11,535,440 B2Granted
Magnetic reseal
AssigneeSonoco Development, Inc.
InventorScott William Huffer
Life of this patent
Estimating the term…
Abstract
The invention is directed to a polymeric film web, a carrier film, and a magnetic member. The carrier film comprises an inner polyethylene terephthalate layer and an outer plastomer layer. The magnetic member and the carrier film are layered onto the polymeric film web to form a closure member. The outer plastomer layer is adjacent the magnetic member and the carrier film extends beyond an upper edge and/or a lower edge of the magnetic member. The closure is heat sealed such that the seal at the interface of the first carrier film and the second carrier film is a peelable seal, the seal at the interface of the first film web and the first carrier film is a permanent seal, and the seal at the interface of the second film web and the second carrier film is a permanent seal.
Claims37
A packaging structure comprising:
- a polymeric film folded into a pouch structure such that the pouch comprises a first end, a folded second end opposite the first end, and two sealed side edges, wherein the first end comprises an opening into the pouch and wherein the pouch comprises an interior surface;
- a carrier film disposed adjacent the first end of the pouch, on the interior surface of the pouch, on opposite sides of the opening, wherein the carrier film comprises:
- an inner layer, wherein at least a first portion of the inner layer is peelably heat sealed to a second portion of the inner layer on the opposite side of the opening so as to peelably seal the packaging structure closed;
- and
- an outer layer adhesively bonded to the inner layer, wherein the outer layer comprises a plastomer and is permanently sealed to the interior surface of the pouch;
- and
- a magnetic member disposed between the pouch and the outer layer of the carrier film.
4 more elements
A packaging structure comprising:
- a first polymeric film sheet and a second polymeric film sheet sealed together to form a package having a first end, a closed second end opposite the first end, and at least two sealed side edges, wherein the first end comprises an opening into the package and wherein the first polymeric film sheet and the second polymeric film sheet comprise an interior surface;
- a first carrier film strip disposed adjacent the first end of the package, on the interior surface of the first polymeric film sheet, wherein the first carrier film strip comprises:
- an inner layer;
- and
- an outer layer which comprises a plastomer, wherein the outer layer is permanently sealed to the interior surface of the first polymeric film sheet;
- a second carrier film strip disposed adjacent the first end of the package, on the interior surface of the second polymeric film sheet, wherein the second carrier film strip comprises:
- an inner layer peelably heat sealed to the inner layer of the first carrier film strip so as to peelably seal the packaging structure closed;
- and
- an outer layer which comprises a plastomer, wherein the outer layer is permanently sealed to the interior surface of the second polymeric film sheet;
- a first magnetic member disposed between the first polymeric film sheet and the outer layer of the first carrier film strip;
- and
- a second magnetic member disposed between the second polymeric film sheet and the outer layer of the second carrier film strip.
9 more elements
A method for forming a packaging structure comprising:
- providing a polymeric film web;
- providing a carrier film, wherein the carrier film comprises:
- an inner layer comprising polyethylene terephthalate;
- and
- an outer layer which comprises a plastomer;
- and
- providing a magnetic member;
- layering the magnetic member and the carrier film on the polymeric film web as follows to form a closure member:
- a first layer of the film web, a first magnetic member, a first carrier film, a second carrier film, a second magnetic member, and a second film web, wherein the carrier film is disposed such that the outer plastomer layer is adjacent the magnetic member and wherein the carrier film extends beyond at least one of an upper edge and a lower edge of the magnetic member;
- and
- heat sealing the closure member at a temperature that is higher than the seal initiation temperature of the polyethylene terephthalate layer such that the seal at the interface of the first carrier film and the second carrier film is a peelable seal, the seal at the interface of the first film web and the first carrier film is a permanent seal, and the seal at the interface of the second film web and the second carrier film is a permanent seal.
8 more elements
A carrier film for a magnetic closure comprising:
- a first non-extensible inner layer;
- a second non-extensible inner layer, wherein an inner surface of the first inner layer is configured to form a peelable heat seal with an inner surface of the second inner layer;
- a first outer layer having an inner surface adhesively bonded to an outer surface of the first inner layer, wherein the first outer layer comprises a plastomer and wherein the outer surface of the first outer layer is configured to form a permanent heat seal with a first wall of a packaging structure;
- a second outer layer having an inner surface adhesively bonded to an outer surface of the second inner layer, wherein the second outer layer comprises a plastomer and wherein the outer surface of the second outer layer is configured to form a permanent heat seal with a second wall of the packaging structure;
- a first magnetic member disposed adjacent the outer surface of the first outer layer and configured to be sealed between the first wall of the packaging structure and the first outer layer;
- and
- a second magnetic member disposed adjacent the outer surface of the second outer layer and configured to be sealed between the second wall of the packaging structure and the second outer layer.
4 more elements
Dependencies are inferred from the claim text.