US 4,726,975 A · Method and apparatus for adapting separable fasteners for attachment to other objects

Abstract

An improvement for attaching fastener strips to other objects wherein a strip of fastener material is formed into the surface of urethane foam or the like during molding in a mold. The fastener material comprises a backing strip having an outer surface adapted to mate with the foam material during molding and a fastener strip having an outer surface comprising one-half of a fastening system such as hook and loop fastening material. The backing strip and the fastener strip are attached to one another with their respective inner surfaces in face-to-face relationship with their outer surfaces facing outward. The fastener material fits within a longitudinal groove in the mold and the backing material overlaps the groove. The invention comprises an improved apparatus including a backing strip that is wider than the fastener strip and provides exposed strips on both sides of the fastener strip. A pair of strips of polyethylene film is attached to the exposed strips only along lines adjacent the edges of the fastener strip and forms two unattached gasket strips for contacting the mold and preventing entry of the foam-forming liquid into the groove.

Claims14

Dependent claims

A strip of fastener material adapted for forming into the surface of urethane foam and the like during molding in a mold wherein the fastener material comprises a backing strip having an outer surface adapted to mate with the foam material during molding and a fastener strip having an outer surface comprising one-half of a touch fastening system, wherein the backing strip and the fastener strip are attached to one another with their respective inner surfaces in face-to-face relationship with their outer surfaces facing outward, and wherein the fastener material fits within a groove in the mold and the backing material overlaps the groove, characterized in that to prevent the liquid foam-forming material from entering the groove and contaminating the outer surface of the fastener strip

(a) the backing strip is wider than the fastener strip and is disposed to provide strips of the inner surface of the backing strip exposed on either side of the outer surface of the fastener strip;
and,
(b) a pair of strips of polyethylene film are disposed along respective ones of said strips, and said film strips being attached to said strip only along lines adjacent the edges of the fastener strip and extending between the outer edges of the fastener strip and the outer edges of the backing strip to form two unattached gasket strips along either side of the fastening material for contacting the mold to prevent entry of the foam-forming liquid into the groove such that when the strip of fastener material is positioned in the mold said gasket strips form a first pair of gaskets along the respective lines where the backing material contacts the mold adjacent the groove.

A strip of fastener material adapted for forming into the surface of urethane foam and the like during molding in a mold wherein the fastener material comprises a backing strip having an outer surface adapted to mate with the foam material during molding and a fastener strip having an outer surface comprising one-half of a touch fastening system, wherein the backing strip and the fastener strip are attached to one another with their respective inner surfaces in face-to-face relationship with their outer surfaces facing outward, and wherein the fastener material fits within a longitudinal groove in the mold and the backing material overlaps the groove, characterized in that to prevent the liquid foam-forming material from entering the groove and contaminating the outer surface of the fastener strip:

(a) the backing strip is wider than the fastener strip and is disposed to provide equal strips of the inner surface of the backing strip exposed on either side of the outer surface of the fastener strip;
and,
(b) a strip of polyethylene film, is disposed over the fastening strip and along respective ones of said equal strips, said film strip being attached to said equal strips only along lines adjacent the edges of the fastener strip and extending between the outer edges of the backing strip to form unattached gasket strips along either side of the fastening material for contacting the mold to prevent entry of the foam-forming liquid into the groove such that when the strip of fastener material is positioned in the mold said gasket strips form a pair of gaskets along the respective lines where the backing material contacts the mold adjacent to the groove.

Dependencies are inferred from the claim text.

Method and apparatus for adapting separable fasteners for attachment to other objects

Life of this patent

Method and apparatus for adapting separable fasteners for attachment to other objects

Life of this patent

Abstract

Claims14