Easy-open container having an improved reinforcing and tear strip

An easy-open container particularly adapted for packaging products under pressure and comprising:

• a spirally-wound paperboard bodywall layer in strip form defining a substantially cylindrical container having opposed ends, said bodywall layer having longitudinal edges lying adjacent each other and defining an easy-open spiral seam having a butt joint and extending between said opposed ends;
• a flexible barrier liner layer in strip form spirally-wound inside said bodywall layer in superimposed position therewith and being wider than said bodywall layer to define longitudinal edge portions on each side thereof which extend transversely beyond said bodywall layer side edges each of said liner layer edge portions extending through said butt joint and out of said easy-open spiral seam and positioned on the outside of said bodywall layer in folded-over superimposed position with each other and with said bodywall layer;
• a flexible label layer in strip form spirally-wound outside said bodywall layer and said folded-over liner layer edge portions in superimposed position therewith and having longitudinal edge portions overlapped with each other, said label layer being positioned in bridging relation to said easy-open spiral seam and said folded-over liner layer edge portions;
• a tab cut extending through the upper of said label layer edge portions and inwardly from the outer edge thereof to generally the outer edge of said folded-over liner layer edge portions to define a tear tab to be used in easy-opening of said container;
• and
• low strength bonding means positioned between said overlapped label layer edge portions and between said folded-over liner layer edge portions, and high strength bonding means positioned between said superimposed label layer and the upper folded-over liner layer edge portion and between said superimposed label layer and bodywall layer for creating a reinforcing and tear strip extending from said tear tab along said easy-open spiral seam and between the outer edge of the uppermost of said overlapped label layer edge portions and said easy-open spiral seam and which includes the portion of the uppermost of said overlapped label layer edge portions and the upper of said folded-over liner layer edge portions bonded thereto by said high strength bonding means.

An easy-open container particularly adapted for packaging products under pressure and comprising:

• a spirally-wound paperboard bodywall layer in strip form defining a substantially cylindrical container having opposed ends, said bodywall layer having longitudinal skied edges overlapped with each other to thereby define an easy-open spiral seam extending between said opposed ends;
• a flexible barrier liner layer in strip form spirally-wound inside said bodywall layer in superimposed position therewith and being wider than said bodywall layer to define a longitudinal edge portion on each side thereof which extend transversely beyond said bodywall layer side edges;
• one of said liner layer edge portions extending through and out of said easy-open spiral seam and positioned on the outside of said bodywall layer in folded-over superimposed position therewith and the other of said liner layer edge portions being positioned in overlapping relation with the one of said liner layer edge portions on the inside of said bodywall layer;
• a flexible label layer in strip form spirally-wound outside said bodywall layer and said folded-over liner layer edge portion in superimposed position therewith and having longitudinal edge portions overlapped with each other, said label layer being positioned in bridging relation to said easy-open spiral seam and said folded-over liner layer edge portion means;
• a tab cut extending through the upper of said label layer edge portions and inwardly from the outer edge thereof to generally the outer edge of said folded-over liner layer edge portion mean to define a tear tab to be used in easy-opening of said container;
• and
• low strength bonding means positioned between said overlapped label layer edge portions and between said superimposed folded-over liner layer edge portion and bodywall layer and between said overlapped liner layer edge portions, and high strength bonding means positioned between said superimposed label layer and folded-over liner layer edge portion and between said superimposed label layer and body layer for creating a reinforcing and tear strip extending from said tear tab along said easy-open spiral seam and between the outer edge of the uppermost of said overlapped label layer edge portions and said easy-open spiral seam and which includes the portion of the uppermost of said overlapped label layer edge portions and said folded-over liner layer edge portion bonded thereto by said high strength bonding means.