Method for adapting separable fasteners for attachment to other objects

• US 4,814,036 A
• Filed: 09/17/1987
• Issued: 03/21/1989
• Est. Priority Date: 07/17/1985
• Status: Expired due to Term

• Current Assignee: Velcro Industries BV (Chartwell Industries Ltd)
• Original Assignee: Velcro Industries BV (Chartwell Industries Ltd)
• Inventors: Hatch, Richard N.
• Primary Examiner(s): Silbaugh, Jan H.
• Assistant Examiner(s): Kuhns, Allan R.
• Application Number:
  US07/097,867
• Time in Patent Office: 551 Days
• Field of Search: 264/46.4, 264/46.7, 264/276, 425/DIG. 33, 156/245, 156/267, 428/100
• US Class Current: 156/245
• CPC Class Codes: A44B 18/0076 Adaptations for being fixed to a moulded article during moulding
• CPC Class Codes: A44D 2203/00 Fastening by use of magnets
• CPC Class Codes: B29C 33/16 using magnetic means
• CPC Class Codes: B29C 37/0082 Mechanical anchoring B29C66/303 takes precedence
• CPC Class Codes: B29C 44/1261 Avoiding impregnation of a preformed part
• CPC Class Codes: B29C 70/68 by incorporating or moulding on preformed parts, e.g. inserts or layers , e.g. foam blocks mould constructions therefor B29C33/12; joining preformed parts by moulding B29C65/70
• CPC Class Codes: B29K 2105/04 cellular or porous
• CPC Class Codes: B29K 2705/00 Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
• CPC Class Codes: B29L 2031/443 Chairs
• CPC Class Codes: B29L 2031/729 Hook and loop-type fasteners
• CPC Class Codes: B60N 2/5891 characterised by the manufacturing process; manufacturing seat coverings not otherwise provided for

Abstract

An improvement for a process 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 includes 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.

Claims

1. A process wherein a strip of fastener material is formed into the surface of an article during molding of liquid foam-forming material in a mold to form the article, 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 and with their outer surfaces facing outward, and wherein the fastener strip fits within a groove in the mold and the backing strip overlaps the groove, wherein in order to prevent the liquid foam-forming material from entering the groove during the molding and contaminating the outer surface of the fastener strip said process includes the steps of:

(a) forming the backing strip so that it is wider than the fastener strip;

(b) disposing the fastener strip on the backing strip so as to have side strips on the inner surface of the backing strip exposed on either side of outer edges of the fastener strip;

(c) disposing a pair of strips of polyethylene film along respective ones of the exposed side strips with the film strips attached to the side strips along lines adjacent the outer edges of the fastener strip and extending between the outer edges of the fastener strip and outer edges of the backing strip, portions of the film strips adjacent the outer edges of the backing strip remaining unattached so as to form gasket strips of the film along the side strips on either side of the fastener strip adjacent the outer edges of the backing strip; and

(d) positioning the fastener material, prior to introducing the foam-forming liquid into the mold, in the mold with the gasket strips forming a pair of gaskets between the backing strip and the mold adjacent the groove where the backing strip overlaps the mold.

2. The process of claim 1 wherein:

the process further includes the step of forming a second pair of gaskets between longitudinal edges of the fastener strip and sidewalls of the groove.

3. The process of claim 1 wherein:

the step of disposing the pair of polyethylene film strip comprises extending each of the pair of polyethylene film strips over a respective outer edge of the backing strip.

4. The process of claim 1 and additionally comprising the steps of:

(a) fastening the polyethylene film strips to the backing strip from close adjacent the edges of the fastener strip to point intermediate the edge of the fastener strip and the outer edges of the backing strip with an adhesive material containing particles of a magnetically attractable material therein; and

,

(b) positioning a magnetic field in the mold to magnetically attract the magnetically attractable material and the backing strip and the gasket strips in combination therewith towards upper outer edges of the groove.

5. A process wherein a strip of fastener material is formed into the surface of an article during molding of liquid foam-forming material in a mold so as to form the article, 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 and with the outer surfaces facing outward,

and wherein the fastener strip fits within a groove in the mold and the backing strip overlaps the groove, the process of preventing the liquid foam-forming material from entering the groove during the molding and contaminating the outer surface of the fastener strip comprising the steps of:

(a) forming the backing strip to be wider than the fastener strip;

(b) disposing the fastener strip on the backing strip so as to have side strips on the inner surface of the backing strip exposed on either side of outer edges of the fastener strip;

(c) disposing a strip of polyethylene film over the fastener strip and along the exposed side strips with the polyethylene film strip attached to the side strips along lines adjacent the outer edges of the fastener strip and extending between outer edges of the backing strip, portions of the film strip adjacent the outer edges of the backing strip remaining unattached so as to form gasket strips of the polyethylene film along the side strips on either side of the fastener strip adjacent the outer edges of the backing strip; and

(d) positionng the strip of fastener material, prior to introducing the foam-forming liquid into the mold, in the mold with the gasket strips forming a pair of gaskets between the backing strip and the mold adjacent the groove where the backing strip overlaps the mold.

6. The process of claim 5 wherein:

the step of disposing the film strip comprises extending the film strip over outer edges of the backing strip.

7. The process of claim 5 and additionally comprising the steps of:

(a) fastening the polyethylene film strip to the backing strip from close adjacent the edges of the fastener strip to points intermediate the edges of the fastener strip and the outer edges of the backing strip with an adhesive material containing particles of a magnetically attractable material therein; and

,

(b) positioning a magnetic field in the mold to magnetically attract the magnetically attractable material and the backing strip and the gasket strips in combination therewith towards upper outer edges of the groove.

8. The method of improving a strip of fastener material adapted for forming into the surface of an article during molding of liquid foam-forming material in a mold to form the article, the mold containing a groove in the inner sidewalls thereof for receiving the strip of fastener material during molding to prevent foam-forming liquid from entering the groove during the molding and fouling the fastener material'"'"'s interconnecting surface comprising the steps of:

(a) forming the strip of fastener material as a backing strip having a first outer surface on one side thereof adapted to mate with the foam during molding and a second outer surface on the other side thereof comprising one half of a touch fastening system, the backing strip being wider than the second outer surface and the second outer surface being disposed to provide exposed side strips on either side of the second outer surface, the second outer surface being adapted to fit within the groove with the backing strip overlapping the groove;

(b) disposing a pair of strips of polyethylene film along respective ones of the exposed side strips of the backing strip one either side of the second outer surface, said strips of film extending into the mold groove adjacent to side walls of the groove; and

(c) attaching the polyethylene film strips to the side strips along lines adjacent the outer edges of the second outer surface, portion of the film strips adjacent the outer edges of the side strips remaining unattached so as to form gasket strips along either side of the second outer surface for contacting the mold to prevent entry of the foam-forming liquid into the groove whereby when the strip of fastener material is positioned in the mold, the gasket strips form a pair of gaskets between the backing strip and the mold along the area adjacent the groove where the backing strip overlaps the mold.

9. The method of claim 8 wherein:

Step (c) of attaching the film strips comprises attaching the polyethylene film strips along lines adjacent to but spaced from the edges of the second outer surface to form two unattached gasket strips along either side of the second outer surface whereby the two innermost gasket strips form a second pair of gaskets along respective lines between the second outer surface and the sidewalls of the groove.

10. The method of claim 8 and additionally comprising:

(a) fastening the polyethylene film strips to the exposed side strips of the backing strip with an adhesive material containing particles of a magnetically attractable material; and

,

(b) positioning a magnetic field within the mold to magnetically attract the magnetically attractable material and the backing strip and the gasket strips in combination therewith towards edges of the groove in the mold.