[0001] The present invention relates to a box formed from a single piece of punched and
crease-lined cardboard and defining in its interior a pocket into which a leaflet
is inserted illustrating that product which is housed and preserved in the box.
[0002] The term "illustrative leaflet" means any sheet, possibly folded several times on
itself, with descriptions and instructions relative to the product preserved in the
box, the leaflet being able to be extracted from the box and again inserted into it
by the person who wishes to consult it.
[0003] Many types of boxes are known formed from a single piece of punched and crease-lined
cardboard and having an inner pocket into which the box manufacturers directly insert
an illustrative leaflet during production of the boxes, into which the firms preparing
and using the boxes have later merely to insert the products which they are intended
to contain (for example bottles or packs of pharmaceutical products).
[0004] Boxes of this known type comprise at least six main walls, separated from each other
by parallel crease lines about which these walls are folded to form boxes having a
quadrilateral cross-section with four outer main walls and at least two inner main
walls, of which at least one is spaced from the outer wall facing and parallel to
it, to form therewith the pocket for housing the illustrative leaflet.
[0005] GB-A-2277077 (Figures 3 and 4) and DE-A-3208777 (Figure 2) describe boxes formed
from six main walls in which an outer wall is glued to an inner wall from which there
projects another inner wall which is free to rotate within the box and which defines
(with that outer main wall facing it) a pocket for housing a leaflet.
[0006] US-A-3147856 (Figure 3), EP-A-0911266 (Figure 2) and DE 8618368U (Figure 2) describe
boxes formed from seven main walls, in which an inner wall is parallel to and spaced
from an outer wall to form therewith a pocket, this inner wall being flanked, on each
of its longitudinal sides, by another two inner walls which are glued to the outer
walls to which they are adjacent.
[0007] EP-A-1219542 (Figures 7 and 8) illustrates a box, also comprising seven main walls,
of which three are internal to the box: the end inner wall and that adjacent to it
are free (and define a corner pocket housing an illustrative leaflet folded at a right
angle on itself and positioned in correspondence with a longitudinal edge of the box),
the other inner wall being glued to that outer wall superposed on it.
[0008] WO 00/20289 also describes a box having seven main walls and defining a pocket which
is accessible from the outside of the box, even when closed.
[0009] All the boxes referred to above are formed from outer and inner main walls which
have to be folded one onto another (along the crease lines which separate one wall
from another) by the box manufacturer, some crease lines which separate inner walls
from each other being adjacent to crease lines which separate their facing outer walls
along edges of the box at which two consecutive adjacent inner walls face corresponding
inner walls: as a cardboard sheet folded on itself along a crease line provided in
it tends to "open" elastically, i.e. to return towards its original extended or flat
position, and as the boxes are produced by automatic machines which operate at high
speed, it is obvious that the resistance presented by the cardboard sheet to being
folded on itself along a crease line and the tendency to rapidly return to its extended
position constitute a serious problem which results, inter alia, in a slowing down
of the speed of such box production machines. This phenomenon is more important when
the box is folded along edges at which separation crease lines between outer walls
and respectively between inner walls are superposed or adjacent, as happens when the
boxes are of the type having an inner pocket housing an illustrative leaflet.
[0010] It is also very important to note another fact. When the boxes have been produced
and have the illustrative leaflet inserted into the pocket of each box, these boxes,
already glued where necessary but with the two ends or end lids open and spread out
substantially in the plane in which the box outer and inner walls extend (i.e. with
the box compressed or flattened on itself about opposing box crease lines), they are
superposed one on another to form piles or packs of flattened boxes which are despatched
in that state to the firms which use and prepare the finished box. These firms, again
using automatic machines operating at high speed, take each individual box and deform
it (then closing its lower lid, then inserting into the box the product which it is
intended to contain, and finally closing the upper lid) so that the outer consecutive
walls of the box (and likewise the inner walls) form a right angle between them, i.e.
such that the box cross-section becomes substantially square or rectangular. To achieve
this, the machines press against two opposing edges of the flattened box to cause
them to approach each other, and at the same time causing the cardboard sheet to fold
about those crease lines lying between said opposing edges. As, also in this case,
the cardboard sheet presents a non-negligible resistance to being changed rapidly
from its flattened position to the "folded" position which it has to assume in the
final prepared box, and as the cardboard sheet tends elastically to return towards
the flattened position which it had been made to assume by the box manufacturer, it
is often necessary to rotate the various box walls about the crease lines which separate
them from the consecutive walls adjacent to them by more than the 90° (which they
must have and preserve in the final prepared boxes), to be then returned to the desired
final position or attitude.
[0011] All the aforestated problems derive both from the resistance which the cardboard
sheet (used to form the boxes) presents to its folding along the crease lines provided
in it, and to the fact that the cardboard sheet tends elastically to return to the
position which it had or had been made to assume before being subjected to any further
folding.
[0012] The main object of the present invention is to provide a box formed from a single
piece of cardboard or the like having crease lines such that the cardboard sheet presents,
compared with the known art, both a reduced resistance to its folding about said crease
lines, and a reduced elastic force tending to return the cardboard sheet already folded
about the crease line to its original position.
[0013] Another object is to provide a punched and crease-lined cardboard sheet which can
be folded about itself with great ease and speed, to form boxes, in particular boxes
having an inner pocket for housing an illustrative leaflet or the like.
[0014] These and other objects are attained by a box of quadrangular cross-section comprising
a plurality of consecutive main walls separated from each other by parallel longitudinal
folding lines and in which at least one main wall is glued to the inside of another
main wall, and also comprising two lids or panels for closing the two ends of the
box and projecting from at least one of the main walls, from which they are separated
by transverse crease lines or folding lines perpendicular to said longitudinal folding
lines, characterised in that along at least one of said longitudinal folding lines
there are provided a plurality or succession of separate aligned cuts.
[0015] The invention provides in particular a box in which said main walls are at least
six in number, of which four form the outer walls of the box, at least two of which
are folded into the box interior, one of the inner walls being glued to an outer wall
and at least one other of the inner walls being spaced from that outer wall facing
and parallel to it to form therewith a pocket for housing an illustrative leaflet,
characterised in that said cuts are provided at least along those crease lines which
are mutually superposed in the outer main walls and respectively in the inner main
walls of the finished box.
[0016] The invention particularly provides a box comprising seven main walls, three of which
are folded into the interior of the box about their respective crease lines, one of
said inner walls being spaced from the outer wall which faces it, whereas the other
two inner walls adjacent thereto and consecutive on one and respectively on the other
side of the first stated inner wall are glued to the respective outer walls on which
they rest.
[0017] Preferably, the cuts provided along those crease lines which separate the inner walls
of the box from each other consist of elongate windows or apertures which extend longitudinally
along the crease lines themselves.
[0018] Again preferably, the cuts provided along those crease lines which separate the outer
walls of the box from each other are offset and displaced longitudinally with respect
to the cuts provided along those crease lines which separate the inner walls of the
box from each other.
[0019] Finally, the invention also relates to the punched and crease-lined sheets usable
for forming the boxes having the aforesaid characteristics.
[0020] The structure and characteristics of the present invention will be more apparent
from the ensuing description of an embodiment of a box given by way of non-limiting
example with reference to the accompanying drawings, in which:
Figure 1 represents a flat punched, crease-lined and knurled cardboard sheet usable
for forming the box;
Figures from 2 to 4 represent the same cardboard sheet in its successive folding stages
for finishing the box;
Figure 5 is a perspective view of the finished box, shown in its position immediately
preceding the insertion thereinto of the product to be preserved in the box; and
Figures 6 and 7 are a cross-section and respectively a longitudinal section through
the box, on the lines 6-6 and respectively 7-7 of Figure 5.
[0021] Reference will firstly be made to Figure 1 which shows (seen from that of its two
sides which is to remain in the box interior) a flat piece of punched, crease-lined
and knurled cardboard, comprising seven consecutive main walls 1-7 separated from
each other by respective parallel longitudinal crease lines 8-13. From the two opposing
ends of the wall 6 there project panels 14 which are separated from the wall 6 by
transverse crease lines 15 perpendicular to the crease lines 8-13 and intended to
form the two end lids of the closed finished box.
[0022] In the wall 6 there is also provided a transverse crease line 16 which extends within
an intermediate region between the longitudinal crease lines 12 and 13 and is prolonged
at both ends by short knurled portions 17. From both ends of the walls 5 and 7 there
project flaps which are of traditional type and which for simplicity are not numbered.
[0023] From each end of the main wall 2 there projects a flap 18 which is separated from
the wall by a knurling 19, in the wall 2 there being provided a hole 20 the function
of which is explained hereinafter.
[0024] From the drawing it can be seen that the walls 5 and 7 have the same width, which
is slightly greater than the width of the walls 1 and 3, the wall 2 being slightly
narrower than the wall 6.
[0025] The cardboard sheet described up to this point is of already known shape or structure.
[0026] The fundamental characteristic of the cardboard sheet according to the invention
is the fact that along one or more of the crease lines 8-13 there are provided a plurality
or succession of cuts which pass through the cardboard sheet in correspondence with
the cuts.
[0027] In the embodiment shown in the drawings, along the crease lines 12 and 13 there are
provided a succession of thin elongate cuts, whereas the crease lines 8 and 9 are
interrupted by cuts 22 in the form of apertures or windows elongate in the direction
of the crease lines. The cuts 21 are offset from the windows 22 so that, when the
box is prepared as explained hereinafter, the windows 22 and cuts 21 are not mutually
superposed: this characteristic is preferred to prevent dust or the like being able
to penetrate into the prepared and closed box.
[0028] It should also be noted that the windows 22 could be replaced by or consist of simple
longitudinal cuts (such as those indicated by the number 21), but for those longitudinal
crease lines to be positioned in the box interior the windows are preferable to cuts.
[0029] It will now be assumed that the cardboard sheet of Figure 1 is to be used to prepare
a box.
[0030] The walls 1 and 2 are firstly rotated onto the walls 3 and 4 by folding the cardboard
sheet about the crease line 9 and a strip of glue (represented by dots and not numbered
for simplicity) is applied to the upward facing surface of the wall 1 (Figure 2),
then an illustrative leaflet 23 is rested on the main wall 6, possibly fixing it thereto
by a small spot of low tenacity glue (also not shown in the drawing) of the type which
enables the illustrative leaflet 23 to be easily detached from the wall 6 when the
leaflet is gripped and pulled by two fingers of a person who wishes to extract it
from the box to consult it.
[0031] The cardboard sheet already partially folded as described, is then folded about the
crease line 11 (by which the glue present on the wall 1 fixes the wall 1 to the wall
5) and a strip of glue (also represented by dots and not numbered) is applied to the
upwardly facing surface of the wall 3 (Figure 3), after which the wall 7 is turned
(by rotating it about the crease line 13) onto the wall 3 (Figure 4), on which it
is fixed by the layer of glue already present on the wall 3.
[0032] At this point (i.e. with the box as shown in Figure 4) the box production is complete:
the boxes obtained have a "flattened" form, with some of the various adjacent or "compressed"
walls being coplanar with and others parallel to the closure panels 14 and flaps 18
respectively.
[0033] The boxes "flattened" in this manner are superposed on each other to form piles or
columns of boxes are despatched by the manufacturer to the box user. This latter,
to prepare the box (which still has the attitude shown in Figure 4), uses known automatic
machines operating at high speed to exert an approaching pressure between the crease
lines 11 and 13 (so that the walls 1, 5; 3, 7 become perpendicular to the walls 2,
6; 4) and closes the closure panel or lower lid of the box, which thus assumes the
attitude shown in perspective view in Figure 5 and in section in Figures 6 and 7.
Under these conditions the user firm can easily insert into the box the product which
the box is to contain, in known manner.
[0034] It will be apparent: that the operation of inserting the product into the box is
facilitated by the presence of the upper flap 18 (which, like the upper closure panel
14, is slightly folded rearwards, i.e. towards the box exterior), which prevents the
product from interfering with the upper edge of the wall 2 or with the illustrative
leaflet 23; that the presence of the illustrative leaflet within the box can be easily
verified via the hole 20 provided in the wall 2; that extraction of the leaflet 23
from the completed box is made very simple by the fact that after the upper lid of
the box has been opened, the panel 14 can be gripped with two fingers and pulled outwards
to tear the wall 6 along the knurlings 17 then rotated about the transverse crease
line 16, to hence leave the upper portion of the leaflet 23 exposed and easily grippable;
and that between the walls 2 and 6 (Figure 6) a pocket is formed for housing the leaflet
23, this pocket having a very stable attitude because of the fact that the inner walls
1 and 3 respectively have a width less than the width of the outer walls 5 and 7 respectively,
to which they are glued.
[0035] The fundamental characteristic of the described box is the fact that along at least
some of its longitudinal crease lines a plurality of thin cuts are provided which
all pass through the thickness of the cardboard sheet.
[0036] In the embodiment shown in the drawings, a plurality of cuts 21 are provided along
both the crease lines 12 and 13 (which are to remain on the outside of the finished
box), whereas in the crease lines 8 and 9 the cuts are widened and take the form of
elongate windows 22 (which are to remain in the interior of the finished box), but
it should be noted that these windows could also be simple cuts, such as those indicated
by the number 21.
[0037] To prevent dust or the like from penetrating into the finished box, the cuts 21 are
offset or displaced longitudinally with respect to the windows 22, so that when the
crease line 12 is superposed on the crease line 8 and, respectively, the crease line
13 is superposed on the crease line 9 in the finished and prepared box, the cuts 21
are not superposed on the windows 22.
[0038] A preferred embodiment of the box has been described in detail, however it is apparent
that the cuts and/or windows could be provided along only some or all of the longitudinal
crease lines of the box.
[0039] The presence of the cuts 21 and/or windows 22 is essential to provide the box with
good machine workability both during its production and during its preparation: in
this respect, these cuts or windows (especially if provided along those longitudinal
crease lines of which, in the finished box, two crease lines are mutually superposed)
greatly reduce both the folding resistance of the cardboard sheet along those crease
lines where the cuts are provided, and the tendency of the cardboard sheet to return
elastically to its position before being folded along these crease lines, with considerable
advantages especially to the box user.
1. A box of quadrangular cross-section comprising a plurality of consecutive main walls
(1-7) separated from each other by parallel longitudinal folding lines (8-13) and
in which at least one main wall (1) is glued to the inside of another main wall (5),
and also comprising two lids or panels (14) for closing the two ends of the box and
projecting from at least one of the main walls (6), from which they are separated
by transverse crease lines or folding lines (15) perpendicular to said longitudinal
folding lines (8-13), charcterized in that along at least one of said longitudinal
folding lines (8-13) there are provided a plurality or succession of separate aligned
cuts (21-22).
2. A box as claimed in claim 1, characterized in that said main walls (4-7) are at least six in number, of which four form the outer walls
(4-7) of the box, at least two (1-3) of which are folded into the box interior, one
of the inner walls (1,3) being glued to an outer wall (5,7) and at least one other
of the inner walls (1,3) being spaced from that outer wall (6) facing and parallel
to it to form therewith a pocket for housing an illustrative leaflet (23), characterized in that said cuts (21,22) are provided at least along those crease lines (8,12; 9,13) which
are mutually superposed in the outer main walls (4-7) and respectively in the inner
main walls (1-3) of the finished box.
3. A box as claimed in claim 2, characterized in that the cuts provided along those crease lines (8,9) which separate the inner walls (1-3)
of the box from each other consist of elongate windows or apertures (22) which extend
longitudinally along the crease lines themselves.
4. A box as claimed in claim 3, characterized in that the cuts (21) provided along those crease lines (12,13) which separate the outer
walls (5-7) of the box from each other are offset and displaced longitudinally with
respect to the cuts (22) provided along those crease lines (8,9) which separate the
inner walls (1-3) of the box from each other.
5. A box as claimed in claims from 2 to 4, characterized by comprising seven main walls (1-7), three of which (1-3) are folded into the interior
of the box about their respective crease lines (8,9), one (2) of said inner walls
being spaced from the outer wall (6) which faces it, whereas the other two inner walls
(1,3) adjacent thereto and consecutive on one and respectively on the other side of
the first stated inner wall (21) are glued to the respective outer walls (5,7) on
which they rest.
6. A punched and crease-lined sheet usable for forming boxes having the characteristics
of claims from 1 to 5.