Envelopes – wrappers – and paperboard boxes – Paperboard box – Elevated bottom wall included in a one-piece box construction
Patent
1992-09-22
1994-10-18
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
Elevated bottom wall included in a one-piece box construction
229193, 2291161, 383104, 493167, 493171, 493174, 493252, B65D 542, B31B 326
Patent
active
053560698
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to the domain of sachets intended to contain a unitary dose of a liquid, pasty or pulverulent product.
And the invention relates more especially to such sachets obtained from a unitary cut-out, preferably longiform and with two large sides parallel, the cut-out being folded on itself to define two faces of generally quadrangular shape of the sachet, the two faces being joined edge to edge by three sides and joining along a fourth side by a bottom formed by the median part of the cut-out placed in three-dimensional forth.
European Patent 0162119 in particular discloses a device for shaping this cut-out, particularly for placing the bottom in three-dimensional form so that the fold of the two faces against each other, from the shaped bottom, defines a volume constituting the sachet intended to receive the unitary dose of product.
In the embodiment described in the European Patent mentioned above, the bottom is shaped by automatic means so as to cause a spacing apart of the two faces, shaping this bottom along an arcuate transverse wall, the two lateral edges separating the bottom from the corresponding face along an arc of circle, and the two arcuate edges joining on the sides of the sachet.
However, this embodiment capable of being shaped by mechanical means does not make it possible to obtain a sachet adapted to stand up by itself, resting on its bottom, since the latter is in hollowed, incurred form.
The invention, according to a first object, makes it possible to produce a sachet of the type concerned, employing mechanical means, the sachet standing up by itself and resting on its bottom like a bottle.
Another object of the invention and (sic.) to allow the production of sachets of the type specified, presenting a mechanical strength and a satisfactory homogeneity, making it possible, in particular, to withstand pressures and mechanical stresses.
Another object of the invention is to allow production of a sachet presenting highly reliable characteristics of tightness.
Finally, according to another object, the invention makes it possible to produce sachets presenting a novel configuration of improved aesthetic characteristics pleasing to the eye and easy to manipulate, adding to the convenience of use resulting from the stand-up positioning of the sachet in vertical position resting by its bottom on a support surface.
To that end, the invention firstly relates to a sachet of the type obtained from a single, plane, longiform cut-out with two long edges parallel, this cut-out being folded on itself to define the two faces of the sachet joining by a transverse bottom formed by the median part of the cut-out, the two faces of the sachet being joined edge to edge by their two long edges and the small side opposite the bottom, the sachet being characterized in that the bottom comprises two triangular facets opposite back to back from the central zone of said bottom, the two triangular facets being folded towards the inner volume of the sachet, the apex of the triangle being oriented upwardly towards the outside and joining the corresponding long edge of the sachet and each long edge of the sachet, formed by the marginal join of the two faces comprises in the zone located between said apex of the triangle and the base of the sachet, four thicknesses or layers coming from the initial cut-out, glued together and the two inner layers glued together are provided to be slightly recessed towards the inside, leaving a marginal zone coming from the two outer layers thus coming into contact with one another and glued together beyond the terminal edge of the two inner layers, thus ensuring tightness and homogeneity of the sachet.
According to a first embodiment, the sachet is provided with a bottom comprising between the two opposite lateral triangles a central rectangular facet forming the plane bottom of the sachet, two opposite sides of the rectangle separating the latter from the corresponding face of the sachet and the other two opposite sides constituting the base of one of the two late
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Bochet Thierry
Moriniere Jean-Pierre
Elkins Gary E.
Packart Holding
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