Air bag

• US 6,142,520 A
• Filed: 08/11/1997
• Issued: 11/07/2000
• Est. Priority Date: 08/12/1996
• Status: Expired due to Fees

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Terazawa, Tomozane, Iino, Yasuhiro, Matsushima, Yosuke
• Primary Examiner(s): CULBRETH, ERIC D
• Application Number:
  US08/907,864
• Time in Patent Office: 1,184 Days
• Field of Search: 280/743.1, 280/728.1
• US Class Current: 280/743.1
• CPC Class Codes: B29C 65/04 Dielectric heating, e.g. high-frequency welding , i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
• CPC Class Codes: B29C 65/4815 Hot melt adhesives, e.g. thermoplastic adhesives
• CPC Class Codes: B29C 65/5021 being multi-layered
• CPC Class Codes: B29C 65/5028 being textile in woven or non-woven form
• CPC Class Codes: B29C 65/5057 positioned between the surfaces to be joined B29C65/5035 takes precedence
• CPC Class Codes: B29C 65/5071 and being composed by one single element
• CPC Class Codes: B29C 66/004 Preventing sticking together, e.g. of some areas of the parts to be joined
• CPC Class Codes: B29C 66/133 Fin-type joints, the parts to be joined being flexible the parts to be joined being rigid B29C66/1312
• 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 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/723 being multi-layered B29C66/7292, B29C66/72941 take precedence
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29C 66/81431 comprising a single cavity, e.g. a groove
• CPC Class Codes: B29C 66/83221 cooperating reciprocating tools, each tool reciprocating along one axis
• CPC Class Codes: B29K 2021/003 Thermoplastic elastomers
• CPC Class Codes: B29K 2067/00 Use of polyesters or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2069/00 Use of PC, i.e. polycarbonates 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 2077/00 Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2079/08 PI, i.e. polyimides or derivatives thereof
• CPC Class Codes: B29K 2995/007 : Hardness
• CPC Class Codes: B29L 2022/027 : Air bags
• CPC Class Codes: B32B 25/08 : of synthetic resin
• CPC Class Codes: B60R 2021/23523 : Composite
• CPC Class Codes: B60R 2021/2358 : Bonding
• CPC Class Codes: B60R 2021/2359 : Welding
• CPC Class Codes: B60R 21/235 : characterised by their material

Abstract

An air bag includes a pair of laminated films and an opening for inflator, in which each laminated film is at least one elastomer layer and at least one shape holding layer.

Claims

1. An air bag comprising;

a pair of laminated films and an opening for the insertion of an inflator, in which each of the laminated films comprise at least one elastomer layer, at least one shape holding layer laminated together thereon over an entire confronting surface of said at least one elastomer layer of each of said pair of laminated films, and a weld layer affixed to said shape holding layer.

2. An air bag according to claim 1, wherein the elastomer layer is made from a thermoplastic elastomer selected from urethane, ester and amide.

3. An air bag according to claim 1, wherein the shape holding layer is made from a polycarbonate, a polyamide, a polyester, a polyimide or a thermoplastic elastomer having a JIS-A hardness of not less than 95°

.

4. An air bag according to claim 1, wherein said weld layer is a thermoplastic material.

5. An air bag according to claim 1, further comprising a reinforcing layer affixed to a laminated film at an end portion of said film.

6. An air bag according to claim 5, wherein said reinforcing layer comprises an elastomer film.

7. An air bag comprising;

a pair of laminated films and an opening for the insertion of an inflator, in which each of the laminated films comprises two elastomer layers and at least one shape holding layer, and wherein each laminated film comprises three layers composed of said two elastomer layers and said at least one shape holding layer interposed therebetween, with each of said elastomer layers laminated over an entire confronting surface of said at least one shape holding layer.

8. An air bag comprising;

a pair of laminated films and an opening for the insertion of inflator, in which each of the laminated films comprises at least one elastomer layer and two shape holding layers and wherein the laminated film comprises three layers composed of said two shape holding layers and said at least one elastomer layer interposed therebetween, with each of said shape holding layer laminated over an entire confronting surface of said at least one elastomer layer.