Envelopes – wrappers – and paperboard boxes – Wrapper – Including means to facilitate severing the wrapper
Patent
1995-03-08
1996-12-10
Garbe, Stephen P.
Envelopes, wrappers, and paperboard boxes
Wrapper
Including means to facilitate severing the wrapper
229926, 383205, B65D 6510, B65D 6514, B65D 6530, B65D 6532
Patent
active
055823424
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention concerns a packaging with a sleeve composed of a flat and foldable packaging material of which two strip edge-zones are sealed together in a junction area, in particular along their inside surfaces, to form said sleeve, such packaging for instance being a tubular pouch, a strip-shaped tear-open zone of the packaging sleeve extending from one of the two strip edge-zones and essentially perpendicularly to said edge zone and comprising notches or linear perforations at its lateral boundaries or only inside the strip-shaped edge zone.
STATE OF THE ART
Packaging of this kind is known from the patent document WO 91/06488 which furthermore also describes the selection of multi-layer packaging materials which, during the opening procedure, for instance when starting from two cuts in an edge zone of the packaging material, that will tear along two approximately parallel lines. The German patent document 38 36 227 A1 furthermore describes a packaging of the initially cited kind wherein the packaging material is constituted by a splicing foil. This foil is a plastic stretched along a single axis and which, beginning at a cut or notch, practically always tears in the direction of stretching. These known packagings are fitted at the beginning of the tear-open zone with a gripping tab formed by part of the edge zones of the packaging material between the notches or the linear perforations.
The said patent document WO 91/06484 also describes several solutions wherein an unsealed area remains between the junction area and the free edge of the edge zones, said unsealed area forming the gripping tab between the two notches or the linear perforations. A tradeoff is required in this design between the gripping tab being of minimal size for good handling and the unsealed area being sufficiently narrow to save material.
DISCUSSION OF THE INVENTION
The object of the invention is to create a packaging of the initially cited kind which comprises a gripping tab easily recognized and handled without thereby incurring a significant increase in material consumption.
The problem basic to the invention is solved by the packaging of the invention which is characterized in that a flat gripping tab is mounted by part of its area at the beginning of the tear-open zone between the two strip-shaped edge zones, this gripping tab being solidly joined to the edge zone where the tear-open zone starts while being detachable or unattached with the other edge zone, said tab by its remaining area projecting beyond the edge of that edge zone where the tear-open zone begins. Advantageously the gripping tab may be narrower than the tear-open zone.
In an advantageous embodiment of the invention, the gripping tab is wider than the tear-open zone and moreover is detachable from the edge zone where the tear-open zone starts.
In a further advantageous embodiment of the invention, the linear perforations in that edge zone where the tear-open zone begins stop short of the free edge of said edge zone.
In further advantageous embodiments of the packaging of the invention, the adhesion of the sealing of the connection zone is less on the average within the tear-open zone than in the remainder of the junction area, and for that purpose the sealing may assume the form of a grid of lines especially within the tear-open zone.
In a last advantageous embodiment of the invention, the packaging material is characterized by consisting of several layers selected from the sequence of paper, unstretched polyolefin foil or layer, aluminum foil, a foil of biaxially stretched polyethyleneterephthalate, a foil of biaxially stretched polyamide, and a sub-composite of two or three layers, where called for of the above materials, the particular earlier cited layer in this sequence of all adjoining different layers in the packaging material being nearer the packaged goods and the particular thinner layer of adjoining layers made of the same or similar materials being nearer the packaged good, and where the sub-composite is defined as one with adh
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patent: 5184771 (1993-02-01), Jud et al.
patent: 5356068 (1994-10-01), Moreno
Garbe Stephen P.
Teich Aktiengesellschaft
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