Envelopes – wrappers – and paperboard boxes – Paperboard box – Multi-layer side or bottom wall having two or more layers of...
Patent
1998-07-21
2000-01-18
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
Multi-layer side or bottom wall having two or more layers of...
53207, 53462, 22912504, 229231, 229930, 229939, 493 94, 493 96, 493907, B65D 554, B65D 556, B31B 700
Patent
active
06015084&
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a set of blanks for constructing a packaging box of the type comprising at least two blanks made of a material in the form of sheets of board or corrugated board, namely a first blank comprising a series of at least four principal leaves ending in a fixing tab, said principal leaves being connected together via first fold lines parallel to each other, directly or via intermediate leaves, which series is provided on one side with a first series of flaps connected to said series of principal leaves by second fold lines perpendicular to said first fold lines, said series of leaves being able to form a ring of walls for the box and a second blank comprising at least two panels connected together by a third fold line, namely a first panel and one or more second panels.
It also relates to a box produced from such a set of blanks, as well as to the process and machine for making such a box.
It has a particularly important although not exclusive application in the field of reinforced corrugated board boxes, as well as in the field of boxes with added value, for example having a spout or a wall that holds back the loose products contained inside the box, after opening.
Reinforced boxes comprising a set of blanks of this kind are already known (U.S. Pat. No. 5,108,028). Such boxes have disadvantages in that they cannot be formed mechanically and do not offer sufficient stiffness.
The present invention alleviates these disadvantages.
The object of the invention is to provide a set of blanks, a box, a process and a box-making machine that fulfills mores satisfactorily than the prior art the needs of the field, notably in that it allows fast, efficient automatic assembly of the boxes but produces almost no waste, despite high throughputs.
The boxes produced also have good stiffness and great resistance to compression and destruction.
To this end the invention provides in particular a set of blanks for the construction of a packaging box of the type described above, characterized blank, said first blank by means arranged so as to permit relative movement of said second panel or panels with respect to the first blank when the box is being formed by a simultaneous rolling up of said prejoined blanks around a volume of defined dimensions, and positioned with respect to the corresponding fold lines of the first blank in order to enable the extra thicknesses of the sheets of board to be compensated for during said rolling up.
The fold lines according to the invention are simple, that is to say are designed to form an edge whose ridge is a single line.
In advantageous embodiments use is made of any of the following arrangements: portion in said second panel or in the leaf opposite, and a hole that continues and is complementary in shape with said precut portion which is fixed nondetachably to the leaf of the first blank or to the second panel opposite it, in order to enable the extra thicknesses to be compensated for by the sliding of said portion in the plane and into said hole during rolling up.
The term "precut portion" denotes a breakable portion held by only a few points of attachment with the rest of the leaf and therefore easily detachable in the plane and/or perpendicular to the plane of said leaf or panel. connecting the second panel in such a way that it can slide in the plane relative to the first blank during rolling up; example spots or lines or glue.
The term "glue with progressive tack" denotes a glue that stays pasty for a few seconds, for example 30 s, and so allows sliding to occur between blanks before definitive and rigid joining occurs. detachable portions.
Such an arrangement permits the further separation of the components of the box formed in this way, by detaching one from the other transversely and removing one from the other in an upward or downward movement; fourth fold lines perpendicular to the third fold lines; other side of the principal leaves from the first series of flaps, and connected to said leaves by fifth fold lines parallel to the second fold lines; lon
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Desertot Didier
Mathieu Gerard
Elkins Gary E.
Otor
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