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Method of manufacturing seat cushions

  • US 4,107,829 A
  • Filed: 03/23/1977
  • Issued: 08/22/1978
  • Est. Priority Date: 04/05/1976
  • Status: Expired due to Term
First Claim
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1. A method of manufacturing a seat cushion comprising the steps of placing a seat covering providing fabric material on a lower die disposed opposite to an upper die of shape complementary to that of said lower die, supplying steam by way of at least one conduit connected with said upper and lower dies thereby heating and wetting said fabric material, urging said upper and lower dies relative to each other to press said fabric material therebetween thereby forming a seat covering of bag-like structure, inserting a first filler pad of cushion providing material into the internal space of said seat covering of bag-like structure and bonding said first filler pad to said seat covering, bonding a second filler pad of cushion providing material having a density greater than that of said first filler pad to said first filler pad, mounting a frame together with elements including springs on the assembly thus obtained, anchoring said seat covering to said frame at its peripheral edges, and including applying vacuum suction to said lower die so as to assist in the formation of said seat covering of bag-like structure by the steam supply.

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