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Tear tape openable container

  • US 4,558,785 A
  • Filed: 10/09/1984
  • Issued: 12/17/1985
  • Est. Priority Date: 10/09/1984
  • Status: Expired due to Term
First Claim
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1. A severable wall construction for a closed container having walls, the walls formed of a sheet of foldable, tearable material, such as paper or paperboard, the container having an upper and a lower portion normally integrally joined, the upper container portion having a lower edge and the lower container portion having an upper edge, a border zone circumferentially around the container and forming a boundary between upper and lower container portions, the border zone defined by a partial overlapping between the lower edge of the upper container portion and the upper edge of the lower container portion, the sheet material at the border zone being Z-shaped in a cross-section taken at right angles to the border zone, the Z having an outer leg defined by one of the partially overlapped edges, and having an inner leg defined by the other of the partially overlapped edges, the inner leg being substantially parallel to the outer leg, a filament tear tape positioned between and sandwiched by one of the outer legs and the middle leg of the Z and co-extensive along the border zone, means externally of the container for manually grasping an end of the tear tape, whereby when that filament tape end is grasped and pulled, along the length of the border zone, the junction between the tear tape sandwiching one outer leg and the middle leg of the Z is severed and thereby separates the upper from the lower container portion, and whereby the middle and the other, non-severed outer leg of the Z forms a hem of two layers of the sheet material around one edge of one of the separated container portions, the middle leg of the Z forming the outer layer of the hem, whereby the junction of the middle and non-severed outer legs of the Z forms the upper rim of said one of the separated lower container portions, the middle and that leg of the Z which does not sandwich the tear tape being adhered together in intersurface contact, whereby the middle leg of the Z after separation of the upper and lower container portions remains in intersurface engagement with that leg of the Z to thereby form the hem.

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