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  • US 3,146,933 A
  • Filed: 11/25/1960
  • Issued: 09/01/1964
  • Est. Priority Date: 11/25/1960
  • Status: Expired due to Term
First Claim
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1. IN A CONTAINER FORMED OF FOLDABLE SHEET MATERIAL HAVING THERMOPLASTIC PROPERTIES AND HAVING FOUR OPPOSING SIDE WALLS FORMED AND CONNECTED FROM AN INTEGRAL BOTTOM BASE WALL, THREE OF THE SIDE WALLS HAVING TOP END CLOSURE FORMING FOLDABLE ELEMENTS, COMPRISING SAID OPPOSING SIDE WALLS EACH BEING CONNECTED WITH THE OTHER AT SUBSTANTIALLY A RIGHT ANGULAR FORMED CORNER JUNCTION WHEREIN ONE PAIR OF THE OPPOSING SIDE WALLS BEING OVERLAPPED IN PART BY ARTICULATED END FREE PROJECTED FLANGES OF WALL MATERIAL AND FURTHER ARTICULATED FROM THE PROJECTED FLANGES OF THE OTHER PAIR OF ADJACENT SIDE WALLS WHEREBY, A SHORT LOWER CORNER END PLEAT IS FORMED AT EACH OF THE CORNER ENDS OF SAID BOTTOM BASE WALL AND SIDE WALLS, THE SHORT PLEAT BEING SECURED BY THE ARTICULATED UPPER ELONGATED PROJECTED FLANGES FROM SAID OTHER PAIR OF ADJACENT SIDE WALLS AND IN HEAT COMPRESSED SEAM FORMING RELATIONSHIP.

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