Crushed end of self-mating closure segment for lap or fin seal
AssigneeIllinois Tool Works Inc.
InventorEric Plourde
Life of this patent
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Abstract
This disclosure pertains to a forming device used in the formation of a package with a self-mating reclosure, where a single self-mating closure wraps around the periphery of the forming device, and one end of the zipper segment extends into the lap seal of the forming device. Alternatively, one or two ends of the zipper segment could extend into a fin seal. The self-mating reclosure is mounted transversely on the sheet of web or film and includes at least one crushed end proximate to one edge of the sheet of web or film. The self-mating closure may be pre-crushed, prior to attachment to the sheet of web or film, or may be crushed after the sheet of web or film is wrapped around a forming device or similar structure.
Claims23
A method for production of a package or bag, including the steps of:
- providing a sheet of web or film in a machine direction;
- placing a reclosure segment on the sheet of web or film in a transverse direction perpendicular to the machine direction, the reclosure segment having opposed first end second ends separated by a central area, the first end, second end, and central area having a same initial thickness as measured in a thickness direction perpendicular to the machine direction and to the transverse direction;
- after the placing step, wrapping the sheet of web or film around a forming device, thereby bringing together first and second edges of the sheet of web or film;
- after the wrapping step, crushing at least one of the first and second ends of the reclosure segment thereby forming a first crushed area of reduced thickness as compared to the initial thickness, the central area maintaining the initial thickness unchanged during and after the crushing step;
- and
- after the crushing step, sealing the first and second edges of the sheet of web or film to each other.
A method for production of a package or bag, including the steps of:
- providing a sheet of web or film in a machine direction;
- placing a reclosure segment on the sheet of web or film in a transverse direction perpendicular to the machine direction, the reclosure segment having opposed first end second ends separated by a central area, at least one of the first and the second ends having a first crushed area, the first crushed area having a reduced thickness compared to a thickness of the central area as measured in a thickness direction perpendicular to the machine direction and to the transverse direction;
- after the placing step, wrapping the sheet of web or film around a forming device, thereby bringing together first and second edges of the sheet of web or film;
- and
- after the placing step and the wrapping step, sealing the first and second edges of the sheet of web or film to each other.
Dependencies are inferred from the claim text.