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Method and blank for manufacturing shock-absorbing safety devices for vehicle passengers

  • US 3,970,328 A
  • Filed: 07/19/1973
  • Issued: 07/20/1976
  • Est. Priority Date: 02/12/1973
  • Status: Expired due to Term
First Claim
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1. A method for manufacturing shock-absorbing safety devices for passengers in vehicles, comprising the steps of:

  • arranging a pair of sheets of a thin, flat, flexible, extensible and substantially gas tight material one upon the other;

    joining the opposed longitudinal edges of the pair of sheets together to form a gas-tight inner wall of a channel;

    arranging each of a pair of flexible, substantially inextensible flat sheets of material upon each of a pair of exterior surfaces of the channel inner wall;

    joining adjacent edges of the outer sheets together to form an outer wall surrounding the inner channel wall;

    forming an enclosure wall of a plurality of fields of flexible, substantially inextensible sheet material;

    joining the outer wall around each channel to at least two of the flexible fields to form vertices at the boundaries between adjacent material fields;

    connecting each channel of a plurality of channels to at least one of the remaining channels with their inner spaces being continuous and their respective sealed edges merging into and sealed to each other to form an enclosure expandable from a compact folded state to form a network of expandable and foldable channels connected to the enclosure wall; and

    providing at least one gas receiving inlet communicating with the channel network for receiving a supply of compressed gas to cause the enclosure wall to assume a predetermined configuration.

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