Sheet material used to form portions of fasteners
AssigneeMinnesota Mining and Manufacturing Company
InventorsDennis L. Becker, Miroslav Tochacek, Paul E. Hansen
Life of this patent
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Abstract
A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener. The method comprises providing a self supporting polymeric film that provides the structural strength to retain the integrity of the sheet material, and stitching a plurality of yarns through the film to form loops projecting from one surface of the film and locking portions of the stitches adjacent the opposite surface of the film. The sheet material can also include a layer of heat softenable polymeric material adhered to the film over the locking portions.
Claims32
A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener, said method comprising the steps of:
- providing a self supporting polymeric film having first and second major surfaces;
- and
- stitching a plurality of yarns through only the film to form loops projecting from the first surface of the film and form locking portions of the stitches adjacent the second surface of the film.
A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener, said method comprising the steps of:
- providing a self supporting polymeric film having first and second major surfaces;
- stitching a plurality of yarns through the film to form loops projecting from the first surface of the film and form locking portions of the stitches adjacent the second surface of the film;
- and
- printing graphics on one of the surfaces of the film prior to said stitching step.
A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener, said method comprising the steps of:
- providing a self supporting polymeric film having first and second major surfaces;
- stitching a plurality of yarns through the film to form loops projecting from the first surface of the film and form locking portions of the stitches adjacent the second surface of the film;
- and
- heating the upper portions of the loops to form from each loop two projections with enlarged heads on their distal ends.
A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener, said method comprising the steps of:
- providing a self supporting polymeric film having first and second major surfaces;
- stitching a plurality of yarns through the film to form loops projecting from the first surface of the film and form locking portions of the stitches adjacent the second surface of the film;
- heating the loops to cause them to resiliently retain their shapes;
- and
- cutting the loops along one side to form hooks.
A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener, said method comprising the steps of:
- providing a self supporting polymeric film having first and second major surfaces;
- adhering a layer of heat softenable polymeric material along the second surface of the self supporting polymeric film;
- and
- stitching a plurality of yarns through both the film and the layer of heat softenable polymeric material adhered to the film to form loops projecting from the first surface of the film and form locking portions of the stitches adjacent the second surface of the film along the layer of heat softenable polymeric material.
A method for forming a sheet material adapted to be cut into smaller pieces to form portions of a fastener, said method comprising the steps of:
- providing a self supporting polymeric film having first and second major surfaces;
- positioning a film of heat softenable polymeric material along the second surface of the self supporting polymeric film;
- stitching a plurality of yarns through both of the films to form loops projecting from the first surface of the film and form locking portions of the stitches adjacent the second surface of the film;
- and
- heating the film of heat softenable polymeric material to adhere the film of heat softenable polymeric material to the second surface of the film.
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising:
- a backing having a front face and a back face, and comprising a self supporting polymeric film;
- and
- a plurality of yarns stitched through only said film having projecting portions projecting from the front face of said backing, and having locking portions on the side of said film opposite said projection portions;
- said film providing the structural strength to retain the integrity of the sheet material.
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising:
- a backing having a front face and a back face, and comprising a self supporting polymeric film and a layer of heat softenable polymeric material defining the back face of the backing and adhered to said film;
- and
- a plurality of yarns stitched through both said film and said layer, said yarns having projecting portions projecting from the front face of said backing and having locking portions on the side of said film opposite said projecting portions along said back face;
- said film providing the structural strength to retain the integrity of the sheet material.
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising:
- a backing having a front face and a back face, and comprising a self supporting polymeric film having a low elongation ratio and high tear resistance;
- and
- a plurality of yarns stitched through said film having projecting portions projecting from the front face and said backing, and having locking portions on the side of said film opposite said projecting portions;
- said film providing the structural strength to retain the integrity of the sheet material.
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising:
- a backing having a front face and a back face, and comprising a self supporting polymeric film of high molecular weight high density polyethylene at least 0.0015 inch thick;
- and
- a plurality of yarns stitched through said film having projecting portions projecting from the front face of said backing, and having locking portions on the side of said film opposite said projecting portions;
- said film providing the structural strength to retain the integrity of the sheet material.
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising:
- a backing having a front face and a back face, and comprising a self supporting polymeric film, said film having opposite major surfaces and having printing along one of said surfaces;
- and
- a plurality of yarns stitched through said film having projecting portions projecting from the front face of said backing, and having locking portions on the side of said film opposite said projecting portions;
- said film providing the structural strength to retain the integrity of the sheet material.
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising:
- a backing having a front face and a back face, and comprising a self supporting polymeric film;
- and
- a plurality of yarns stitched through said film having projecting portions projecting from the front face of said backing and forming loops, and having locking portions on the side of said film opposite said projecting portions;
- said film providing the structural strength to retain the integrity of the sheet material.
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising:
- a backing having a front face and a back face, and comprising a self supporting polymeric film;
- and
- a plurality of yarns stitched through said film having projecting portions projecting from the front face of said backing, and having locking portions on the side of said film opposite said projecting portions, with some of said projecting portions of said yarns being resiliently flexible hooks;
- said film providing the structural strength to retain the integrity of the sheet material.
A sheet material adapted to be cut into smaller pieces to form portions of a fastener, said sheet material comprising:
- a backing having a front face and a back face, and comprising a self supporting polymeric film;
- and
- a plurality of yarns stitched through said film having projecting portions projecting from the front face of said backing, and having locking portions on the side of said film opposite said projecting portions, said projecting portions of said yarns having enlarged heads at their distal ends;
- said film providing the structural strength to retain the integrity of the sheet material.
Dependencies are inferred from the claim text.