Air bag and method for making the air bag
First Claim
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1. An air bag comprising:
- a first sheet having an inner surface;
a second sheet having an inner surface; and
a releasing layer, having a pattern corresponding to and defining an air chamber, printed on said inner surface of one of said first sheet and said second sheet;
wherein said first and second sheets comprise an extruded bonding layer bonding said inner surfaces of said first and said second sheets to each other, with said releasing layer between said inner surfaces, by heat fusion extruding lamination; and
wherein said air chamber defined by said releasing layer is between said inner surfaces of said first and second sheets.
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Abstract
An air bag is made by bonding a pair of sheets to each other by heat-sealing with a releasing layer corresponding to a pattern of a number of cellular air chambers sandwiched therebetween. A check valve for air infusion, which is used for filling air in the air bag, is mounted in one of the air chambers. When air is infused into a space between either of a pair of sheets and the releasing layer through an air infusion port of the check valve, the releasing layer and the corresponding sheet are peeled from each other by the air pressure. As a result, the air chambers are formed between the two layers.
54 Citations
20 Claims
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1. An air bag comprising:
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a first sheet having an inner surface; a second sheet having an inner surface; and a releasing layer, having a pattern corresponding to and defining an air chamber, printed on said inner surface of one of said first sheet and said second sheet; wherein said first and second sheets comprise an extruded bonding layer bonding said inner surfaces of said first and said second sheets to each other, with said releasing layer between said inner surfaces, by heat fusion extruding lamination; and wherein said air chamber defined by said releasing layer is between said inner surfaces of said first and second sheets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of making an air bag comprising the steps of:
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printing a releasing layer having a pattern corresponding to a desired air chamber pattern on an inner surface of one of a first sheet member and a second sheet member; and bonding the first and second sheets to each other with the releasing layer sandwiched therebetween by heat fusion extruding lamination by extruding a bonding layer of one of the first and second sheets and laminating the first and second sheets. - View Dependent Claims (17, 18, 19)
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20. An air bag made by the process of:
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forming a first sheet having an inner surface; forming a second sheet having an inner surface; and printing a releasing layer having a pattern corresponding to and defining a desired air chamber pattern on said inner surface of one of said first sheet and said second sheet; wherein said steps of forming first and second sheets includes extruding a bonding layer on one of said first and second sheets; and bonding said inner surfaces of said first sheet and said second sheet to each other with said releasing layer between said inner surfaces by heat fusion extruding lamination, thereby forming an air chamber defined by said releasing layer between said inner surfaces of said first and second sheets.
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Specification