Method for adapting separable fasteners for attachment to other objects

• US 4,881,997 A
• Filed: 01/24/1989
• Issued: 11/21/1989
• 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): Dawson, Robert A.
• Application Number:
  US07/301,503
• Time in Patent Office: 301 Days
• Field of Search: 24/306, 24/442, 24/444, 156/66, 156/78, 156/79, 156/73.1, 156/245, 156/292, 264/46.4, 264/46.7, 297/DIG. 1, 297/DIG. 6, 428/100, 428/223, 428/308.4, 428/120, 428/900
• US Class Current: 156/66
• 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 65/08 using ultrasonic vibrations non-plastics element to plastics elements B29C65/645
• CPC Class Codes: B29C 65/086 using a rotary anvil
• CPC Class Codes: B29C 65/7891 of discontinuously moving sheets or webs
• CPC Class Codes: B29C 65/7894 of continuously moving sheets or webs
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/43 Joining a relatively small portion of the surface of said articles B29C66/45 takes precedence
• CPC Class Codes: B29C 66/433 Casing-in, i.e. enclosing an element between two sheets by an outlined seam for bookbinding B42C11/06; for packaging B65B; by laminating B32B37/00; enclosing tubular articles between substantially flat elements B29C66/53261
• CPC Class Codes: B29C 66/436 Joining sheets for making articles comprising cushioning or padding materials, the weld being performed through the cushioning material, e.g. car seats joining through openings B29C66/304
• CPC Class Codes: B29C 66/4722 Fixing strips to surfaces other than edge faces fixing strips to edge faces B29C63/0026
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/727 being porous, e.g. foam
• CPC Class Codes: B29C 66/7392 characterised by the material of at least one of the parts being a thermoplastic
• CPC Class Codes: B29C 66/81427 comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
• CPC Class Codes: B29C 66/8322 Joining or pressing tools reciprocating along one axis
• CPC Class Codes: B29C 66/83411 Roller, cylinder or drum types B29C66/83431 takes precedence; rollers, cylinders or drums moving relative to and tangentially to the parts to be joined B29C66/8362
• CPC Class Codes: B29C 66/83413 : cooperating rollers, cylinders or drums
• CPC Class Codes: B29C 66/83511 : jaws mounted on rollers, cylinders or drums
• 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 2023/06 : PE, i.e. polyethylene
• CPC Class Codes: B29K 2025/06 : PS, i.e. polystyrene
• CPC Class Codes: B29K 2027/06 : PVC, i.e. polyvinylchloride
• CPC Class Codes: B29K 2067/00 : Use of polyesters or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2075/00 : Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• 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
• CPC Class Codes: Y10S 297/01 : Foam
• CPC Class Codes: Y10S 297/06 : Hook and loop type fastener
• CPC Class Codes: Y10S 428/90 : Magnetic feature
• CPC Class Codes: Y10T 24/2708 : Combined with diverse fastener
• CPC Class Codes: Y10T 24/2725 : with feature facilitating, enhancing, or causing attachment of filament mounting surface to support therefor
• CPC Class Codes: Y10T 428/24017 : Hook or barb
• CPC Class Codes: Y10T 428/24182 : Inward from edge of web or sheet
• CPC Class Codes: Y10T 428/249958 : Void-containing component is synthetic resin or natural rubbers

Abstract

An adapted separable fastener and method of making the same for attachment to foam objects such as seat cushions. A separable fastener member of the hook and loop-type is attached, in back-to-back relation, to a second member. The second member has upstanding elements such as loops or hooking elements which elements are ultimately surrounded and encapsulated by the foam during polymerization. The adapted fastener is thereby attached to the foam member. The elements are positioned in order to allow venting of the gaseous byproducts of polymerization. This promotes superior adhesion to the foam material and prevents delamination at the fastener-foam interface. A metal strip may be disposed within the adapted fastener so it may be magnetically held in the foam mold. A method and apparatus for adapting the fastener is also disclosed.

Claims

1. A method of adapting a separable fastener member of the hook and loop-type for attachment to an object which comprises:

(a) taking a separable fastener member having a plurality of hook-type or loop-type engaging elements upstanding from one surface; and

,

(b) attaching said separable fastener member to a second member positioned in back to back relation with the surface of said fastener member opposite the surface having said engaging elements, said second member having a plurality of elements upstanding from the opposite surface, which elements are capable of being surrounded and encapsulated by a material forming at least a part of the object.

2. The method according to claim 1 wherein said attaching step is accomplished by ultrasonic attachment means.

3. The method according to claim 2 wherein said attaching step is accomplished by ultrasonically stitching said separable fastener member to said second member.

4. The method according to claim 1 wherein said attaching step comprises the steps of applying an adhesive material to said second member, positioning said separable fastener member against said adhesive material such that upon curing or drying of said adhesive material, said separable fastener member becomes adhesively attached to said second member.

5. The method according to claim 4 wherein said adhesive material is a hot-melt adhesive.

6. The method according to claim 4 further comprising subsequently directing said separable fastener member and second member through a cooling zone to shorten the setting time of the hot melt adhesive.

7. The method according to claim 4 wherein said adhesive is a solvent based adhesive.

8. The method according to claim 7 further comprising directing said separable fastener member, and said second member through solvent removing means, to thereby shorten the setting time of the adhesive disposed therebetween.

9. The method according to any one of the claims 1-8 further comprising the step of disposing a metal strip between said separable fastener member and said second member so as to render said separable fastener member and said second member magnetically attractive.

10. The method according to claim 1 further comprising attaching said separable fastener to a synthetic foam member.

12. The method according to claim 4 further comprising positioning a protective cover over said engaging elements to protect them from contamination by the foam forming components.

13. The method according to claim 12 further comprising heating the foam article thus formed to thereby cure the foam material.

14. The method according to claim 13 wherein said protective covering is a polyethylene layer which melts and/or disintegrates when subject to the heat of curing of said foam plastic material.

11. A method of producing a foam article with a separable fastener attached thereto comprising:

(a) taking a separable fastener member having a plurality of hook-type or loop-type engaging elements upstanding from one surface;

(b) attaching said separable fastener member to a second member positioned in back to back relation with the surface of said fastener member opposite the surface having said engaging elements, said second member having a plurality of elements upstanding from the opposite surface, which elements are capable of being surrounded and encapsulated by a material forming at least a part of said article;

(c) positioning said separable fastener member and second member assembly into a trough of a mold unit such that said elements extend into the inner space of the mold;

(d) introducing into said mold foam forming components in liquid form;

(e) allowing said foam forming components to surround and encapsulate said elements without said elements interfering with the free escape of excess gas from the space surrounding said elements; and

,

(f) allowing said foam forming materials to cure, dry or set while encapsulating said elements thereby creating a foam article with said separable fastener attached thereto with its upstanding engaging elements extending away from the surface of the article.

15. A method for attaching a separable fastener to a foam plastic object comprising:

(a) taking a separable fastener member having a plurality of hook-type or loop type engaging elements upstanding from one surface;

(b) positioning a metal strip in back to back relation with the surface of said fastener member opposite the surface having said engaging elements;

(c) adapting said separable fastener member for attachment to the foam plastic article by attaching said separable fastener member to a second member positioned in back to back relation with the surface of said fastener member opposite the surface having said engaging elements thereby sandwiching said metal strip therebetween, said second member having a plurality of elements upstanding from the opposite surface which are capable of being surrounded and encapsulated by a material forming at least part of said object;

(d) positioning said adapted separable fastener member into a trough of a mold unit which trough has magnetic means to maintain said adapted fastener in position in said trough by magnetic attracting to said metal strip, said adapted fastener being positioned such that said elements extend into the inner space defined by the mold;

(e) introducing foam forming components in liquid form into said mold so as to permit the components to flow into and around said plurality of upstanding elements;

(f) allowing said foam forming components to surround and encapsulate said elements while undergoing polymerization while permitting free venting of excess gases formed by the polymerization process.

16. The method according to claim 15 further comprising:

(a) attaching a plastic protective covering to said assembly prior to placing said assembly in said trough, in a position covering said engaging elements of said separable fastener so as to protect same from contamination by foam forming components.

17. The method according to claim 16 further comprising:

(a) placing the object in a curing oven after molding in order to cure the foam and melt away the plastic protective covering.