Importance

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Abstract

A tear tape opening system is provided for establishing an opening in a package or carton formed of corrugated board wherein the corrugated board consists of an outside liner, an inside liner and a corrugating medium thereinbetween, wherein the outside liner has outside and inside surfaces and the inside liner has outside and inside surfaces, and the inside surfaces of the outside and inside liners face the corrugating medium. The tear tape opening system according to the present invention includes a hot melt coated tear tape adhered to the outside surface of the inside liner along the desired line of opening and a hot melt coated tear guide tape, at least as wide as the tear tape, adhered to the inside surface of the outside liner along the desired line of opening so as to guide the tear formed by the tear tape and reinforce and stabilize at least one edge of the tear along the outside surface of the outside liner. The tear tape opening system is incorporated in the corrugated board in the doublebacker segment of the corrugator board forming machine. In order to prevent smearing or transfer of the softened hot melt from the tear tape to the pressure belt of the doublebacker, a paper backed hot melt coated tape is utilized, or a differential hot melt is used wherein a high temperature hot melt, unaffected by the hot plates of the doublebacker, is used to coat the surface of the tear tape in contact with the pressure belt.

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First Claim