[0001] The present invention relates to apparatus for producing and transporting folded
coupons and, in particular to apparatus for producing, transporting and stacking folded
inserts, onserts and outserts for cigarette packs.
[0002] To serve as a medium for advertising or promotional purpose and/or to provide information
about products, it is known to include folded sheets of pre-printed material with
packaged consumer goods. The folded pre-printed material may be included as an insert
within the packaging so that it is not visible to the consumer until after they have
purchased the goods and the packaging has been opened or removed. Alternatively, the
folded pre-printed material may be affixed to the exterior of the packaging so that
it is directly visible to the consumer before purchase of the goods. In the latter
case, it is particularly important that the quality or precision of the folding of
the sheet of pre-printed material is high. For example, folded sheets of pre-printed
material are often included on cigarette packs having an outer transparent film wrapper
either as onserts, positioned between the pack and the outer film wrapper, or as outserts,
affixed to the exterior of the outer film wrapper.
[0003] Buckle folders are commonly used to fold sheets of pre-printed material one at a
time to produce individual inserts, onserts and outserts. However, the higher the
speed at which buckle folders operate, the lower the folding quality of the inserts,
onserts and outserts produced. Consequently, to achieve high folding quality without
limiting the output speed of packaging machinery, inserts, onserts and outserts for
packaged consumer goods have conventionally been produced by folding sheets of pre-printed
material in buckle folders off-line. The pre-folded individual inserts, onserts or
outserts are then stacked in cartridges that are delivered to the packaging machinery
where the individual inserts, onserts or outserts are fed from the cartridges to inserters
or applicators that deliver and insert them into or apply them onto the packaged consumer
goods.
[0004] The use of pre-folded individual inserts, onserts and outserts that have been formed
off-line has a number of disadvantages. As well as involving additional expense, the
process of filling and storing cartridges, transferring the cartridges to packaging
machinery and then feeding individual folded inserts, onserts or outserts from the
cartridges to inserters or applicators is labour intensive. Furthermore, the individual
pre-folded inserts, onserts or outserts can be difficult to handle at the very high
production speeds at which packaging machines typically operate, cigarette packaging
machines for example may produce 400 packs per minute or more, having a tendency to
jam. To overcome such problems, a number of in-line insert and onsert folder systems
have been proposed.
[0005] WO-A1-2004/003726 describes an in-line insert folder system including a continuous roll of unfolded
printed inserts, a cutter head that cuts individual inserts from the continuous roll
and a buckle folder for folding the individual inserts and delivering them to an applicator
for placement directly onto consumer packs such as cigarette packs or onto the outer
film wrap for the packs.
[0006] WO-A1-2004/076322 describes an in-line onsert folder system that comprises a continuous roll of pre-printed
onserts and a transverse cutter assembly constructed and arranged to cut a pair of
onserts in side-by-side relationship from the roll. The pair of printed onserts in
flat unfolded condition is delivered in a downstream direction to a buckle folder
with wide rollers that receives the pair of onserts and folds them as a single unit
along at least one fold line. The pair of folded onserts are then cut by a longitudinal
cutter into individual units and conveyed in a downstream direction along dual diverging
paths for application onto consumer packs such as cigarette packs also travelling
along dual paths.
[0007] The use of a "wider" buckle folder to produce multiple width folded inserts, onserts
or outserts advantageously increases production speed and capacity and also results
in less misalignment of the sheets of pre-printed material and so better folding quality.
It would be desirable, however, to provide an in-line folding system comprising a
wider buckle folder in which the individual folded inserts, onserts and outserts produced
by cutting multiple width folded inserts, onserts and outserts are fed along a single
path for loading into a cartridge or hopper, or for direct application onto a single
stream of packaged consumer goods.
[0008] Furthermore, as individual inserts, onserts or outserts are transported along one
or more paths during the production of packaged consumer goods it is sometimes necessary,
depending upon the layout of the packaging machinery, to change the direction in which
they are transported and/or to change their orientation relative to the direction
of transport.
[0009] In existing paper transport systems, changes in direction and orientation of the
transported material are commonly achieved by transporting the paper between pairs
of belts. However, slippage between the belts can disadvantageously result in damage
to the transported material, especially where the transported material is delicate
or folded. In addition, the use of pairs of belts to achieve changes in orientation
of the transported material requires complicated geometries as well as a number of
rollers, belts and a separate drive.
[0010] It would also be desirable, therefore, to provide apparatus for changing the orientation
of transported folded inserts, onserts and outserts for packaged consumer goods, which
are typically made from delicate lightweight paper, that is simpler in geometry and
less prone to damaging the inserts, onserts and outserts than existing paper transport
systems.
[0011] When inserts, onserts and outserts are transported through packaging machinery between
pairs of belts, slight changes in the position of the inserts, onserts and outserts
between the belts can occur. In order to maintain quality and allow for smooth downstream
processing, inserts, onserts and outserts that become misaligned as a result of such
changes must be rejected.
[0012] It would be desirable to provide simple apparatus for aligning a stream of transported
inserts, onserts or outserts that would obviate the need to reject misaligned inserts,
onserts or outserts and so reduce costs and waste.
[0013] According to the invention there is provided apparatus for producing and transporting
folded coupons comprising: a buckle folder for receiving and folding sheet material
to produce a multiple width folded coupon; a cutter for cutting the multiple width
folded coupon (18) to produce at least two individual folded coupons disposed in side-by-side
relationship; and a transport system for receiving the at least two individual folded
coupons disposed in side-by-side relationship from the cutter and transporting the
at least two individual folded coupons downstream along a transport axis, characterised
in that the transport system comprises at least two separate coupon transport paths
disposed in side-by-side relationship that merge to form a single coupon transport
path, at least a portion of each separate coupon transport path being twisted about
the transport axis, wherein, in use, each of the at least two individual folded coupons
is transported along a different one of the at least two separate coupon transport
paths such that, when the at least two separate coupon transport paths merge to form
a single coupon transport path, the at least two individual folded coupons are displaced
relative to one another along the transport axis.
[0014] Throughout the specification the term "folded coupon" is used to mean any sheet material
comprising at least one fold and includes, but is not limited to, informational, instructional
and/or promotional inserts, onserts, outserts, leaflets, tokens, vouchers and labels
comprising one or more roll, gate and/or concertina (zig-zag) folds.
[0015] The sheet material may be any suitable material such as, for example, paper, card,
plastic, foil or combinations thereof. Preferably, the sheet material is paper, more
preferably lightweight paper. Preferably the paper has a weight of between about 25
g/m
2 to about 80 g/m
2, more preferably of between about 30 g/m
2 to about 60 g/m
2.
[0016] By using a wide buckle folder to produce multiple width folded coupons, cutting the
multiple width folded coupons to form a plurality of separate individual folded coupons
disposed in side-by-side relationship and then merging the separate individual folded
coupons into a single lane, the apparatus of the invention overcomes the inherent
speed limitation of the buckle folder. Indeed, the operating speed of the buckle folder
may be advantageously reduced while maintaining targeted output, thereby improving
the folding quality of the inserts, onserts, outserts or other folded coupons produced.
[0017] Transporting the at least two individual folded coupons along twisted portions of
the at least two separate coupon transport paths prior to merging the at least two
separate coupon transport paths into a single path changes the orientation of the
at least two individual folded coupons relative to the transport axis. This enables
the individual folded coupons to be merged into a single lane without being twisted
about an axis perpendicular to the plane thereof, which would result in damage to
the individual folded coupons.
[0018] Preferably, the at least two separate coupon transport paths are of different length.
In use, by transporting the at least two individual folded coupons along separate
coupon transport paths of different length, at substantially the same speed, the at
least two individual folded coupons are displaced relative to one another along the
transport axis.
[0019] Alternatively, the at least two individual folded coupons could, for example, be
transported along separate coupon transport paths of the same length at different
speeds in order to displace the at least two individual folded coupons relative to
one another along the transport axis.
[0020] Preferably, the at least two individual folded coupons are displaced relative to
one another along the transport axis upstream of the twisted portions of the separate
coupon transport paths.
[0021] Preferably, the apparatus further comprises a turning unit mounted downstream of
the transport system for receiving the at least two individual folded coupons from
the transport system along the transport axis and transporting the at least two individual
folded coupons downstream along a second transport axis substantially perpendicular
thereto, the turning unit comprising a single driven belt and a free roller between
which, in use, the at least two individual folded coupons are transported. The use
of a single driven belt and a free roller, rather than a pair of belts, advantageously
avoids slippage that could damage the individual folded coupons.
[0022] According to the invention there is further provided apparatus for changing the orientation
of transported laminar articles, the apparatus comprising: an elongate fixed surface
twisted about its longitudinal axis; and a driven belt mounted such that it follows
and is in contact with the elongate fixed surface, whereby, in use, laminar articles
held between the belt and the elongate fixed surface are transported longitudinally
along the elongate fixed surface by the driven belt.
[0023] Apparatus for changing the orientation of transported laminar articles according
to the invention may be used in order to change the direction in which a given stream
of laminar articles is transported and/or to enable separate streams of laminar articles
to be merged into a single stream.
[0024] Preferably, the elongate fixed surface is twisted about its longitudinal axis through
an angle of up to 90 degrees in a clockwise or anti-clockwise direction. More preferably,
the elongate fixed surface is twisted through an angle of approximately 90 degrees
about its longitudinal axis.
[0025] Preferably, the driven belt is substantially non-circular in cross-section, more
preferably the driven belt is substantially trapezoidal in cross-section. The use
of a driven belt of substantially trapezoidal cross-section assists in ensuring that
the driven belt follows and is in contact with the elongate fixed surface. Furthermore,
a substantially trapezoidal cross-section advantageously prevents the driven belt
from rotating about its longitudinal axis as it transports the laminar articles along
the elongate fixed surface.
[0026] Preferably, the elongate fixed surface is a metal plate, more preferably a metal
plate having a friction reducing structured surface of a type known in the art. To
avoid damage to laminar articles as they are transported along the twisted elongate
fixed surface of the apparatus by the driven belt thereof, the coefficient of friction
between the laminar articles and the elongate fixed surface should be less than that
between the laminar articles and the driven belt. The use of a metal plate having
a low friction structured surface advantageously reduces friction between the laminar
articles and the elongate fixed surface as they are transported along the twisted
elongate fixed surface by the driven belt.
[0027] Preferably, the longitudinal axis of the metal plate or other elongate fixed surface
is bowed. The provision of a small bow or curve in the longitudinal axis of the elongate
fixed surface helps to ensure that laminar articles are constantly and positively
held between the elongate fixed surface and the driven belt as they are transported.
[0028] The laminar articles may be folded or unfolded printed sheet material. Preferably,
the laminar articles are folded coupons, most preferably the laminar articles are
folded paper coupons.
[0029] According to the invention there is also provided apparatus for aligning transported
laminar articles, the apparatus comprising: an elongate fixed surface; a guide extending
along the elongate fixed surface; a driven belt extending along the elongate fixed
surface proximate the guide; and a pair of rollers disposed at either end of the belt,
wherein the belt is mounted on the rollers with its longitudinal axis inclined at
an acute angle to the axes of rotation thereof such that, in use, the belt rotates
about its longitudinal axis as it is driven, whereby, in use, laminar articles held
between the belt and the elongate fixed surface are transported longitudinally along
the elongate fixed surface by the driven belt and concurrently transversely aligned
against the guide by rotation of the driven belt about its longitudinal axis.
[0030] Preferably, the belt is substantially circular in cross-section. A substantially
circular cross-section advantageously facilitates rotation of the belt about its longitudinal
axis as it is driven.
[0031] Preferably, the elongate fixed surface is a metal plate, more preferably a metal
plate having a structured surface which, in use, reduces friction between the laminar
articles and the elongate fixed surface as the laminar articles are transported along
the elongate fixed surface and aligned against the guide by the belt.
[0032] Preferably, the metal plate or other fixed surface is at least slightly curved. The
provision of a small bow or curve in the longitudinal axis of the fixed surface helps
to ensure that laminar articles are constantly and positively held between the fixed
surface and the belt as they are transported.
[0033] The invention will be further described by way of example only, with reference to
the accompanying drawings in which:
Figure 1 is a schematic perspective view of a modular system for producing and transporting
onserts according to the present invention;
Figures 2a to 2d are schematic views of the relative positions of folded onserts produced
by the modular system of Figure 1 at various stages during production.
Figure 3 is an enlarged perspective view of a twisting unit forming part of the modular
system of Figure 1; and
Figure 4 is an enlarged perspective view of an alignment unit forming part of the
modular system of Figure 1.
[0034] Figure 1 shows a modular system 2 for folding sheets of pre-printed paper to produce
multiple width folded onserts, cutting the multiple width folded onserts to produce
separate individual folded onserts and transporting the separate individual folded
onserts to a hopper where they are stacked ready for placement onto packaged consumer
goods, such as cigarette packs.
[0035] The modular system 2 shown in Figure 1 generally comprises a buckle folder 4, a separation
unit 6, a joining unit 8, an alignment unit 10, a feeding unit 12 and a hopper 14,
which are connected to one another via a series of belt transport systems, and which
are linked to a computer control system (not shown).
[0036] In use, flat sheets of paper with three onserts pre-printed thereon in side-by side
relationship are placed in a stacker 16, which is mounted on the buckle folder 4.
As explained in more detail below, depending upon demand the sheets of pre-printed
paper are drawn sequentially from the stacker 16 into the buckle folder 4 where they
are processed through various rollers and folding pans or chutes in a known manner
to produce triple width folded onserts 18 as shown in Figure 2a (the broken lines
in Figure 2a show the three individual folded onserts making up the triple width folded
onsert 18). As an alternative to using sheets of pre-printed paper, a bobbin holding
a continuous roll of pre-printed paper and a registered transverse cutter assembly
constructed and arranged to cut three onserts in side-by-side relationship from the
continuous roll may be linked to the buckle folder 4 as described in, for example,
WO-A1-2004/003726 and
WO-A1-2004/076322.
[0037] Upon exiting from the buckle folder 4, the triple width folded onserts 18 are cut
longitudinally by a longitudinal cutter assembly (not shown) to produce a group of
three separate individual folded onserts 20 disposed in side-by side relationship,
as shown in Figure 2b. The arrows between Figures 2a to 2d indicate the downstream
direction of transport of the folded onserts through the modular system 2 shown in
Figure 1.
[0038] A first belt transport system 22 immediately downstream from the longitudinal cutter
assembly serially receives the groups of three separate individual folded onserts
20 after the longitudinal cutting operation and transports them between three pairs
of driven endless belts to an ejection unit 24 located beneath the buckle folder 4.
As shown in Figure 1, the three separate individual folded onserts 20 in each group
are moved along three parallel vertical lanes of equal length by the three pairs of
endless belts, which are driven at the same speed by the buckle folder 4. Each group
of three separate individual folded onserts 20 is, therefore, delivered by the first
belt transport system to the ejection unit 24 in the side-by-side relation shown in
Figure 2b.
[0039] A plurality of photocells 26 linked to the computer control system are mounted immediately
upstream of the ejection unit 24. In use, these photocells 26 measure the width and
length of individual folded onserts 20 in each of the three lanes of the first belt
transport system 22 as they pass from the longitudinal cutter assembly to the ejection
unit 24. The width and length measurements of each individual folded onsert 20 are
compared by the computer control system with pre-set specified limits. If the measurements
are within the pre-set specified limits, the computer control system allows the three
individual folded onserts 20 to pass through the ejection unit 24 and continue downstream
through the remainder of the modular system 2. If, however, the width or length measurement
of any of the three individual folded onserts 20 falls outside of the pre-set specified
limits, the computer control system instructs the ejection unit 24 to remove the three
individual folded onsert 20 from the system 2.
[0040] Upon exiting the ejection unit 24, the groups of three separate individual folded
onserts 20 are serially received, in the side-by-side relation shown in Figure 2b,
by the separation unit 6, which transports them further downstream to the joining
unit 8. As described in more detail below, in the separation unit 6 the three separate
individual folded onserts 20 in each group are displaced or shifted relative to one
another in the direction of travel, so that they are no longer aligned in side-by-side
relation when they reach the joining unit 8.
[0041] The separating unit 6 comprises a series of pairs of driven endless belts that move
the three separate individual folded onserts 20 in each group along three parallel
lanes 28. In use, the pairs of endless belts are driven at the same speed, however,
as shown in Figure 1, the three parallel lanes 28 along which the three separate individual
folded onserts 20 in each group are transported are not of equal length. Consequently,
as the three individual folded onserts 20 in each group are transported substantially
vertically downwards from the ejection unit 24, turned through 90 degrees using a
turn module described in more detail below, and then transported substantially horizontally
along the three parallel lanes 28 between the series of pairs of driven endless belts,
they travel over different distances at the same speed. As a result, when the three
separate individual folded onserts 20 in each group reach the joining unit 8, upstream
of the separation unit 6, they are shifted relative to one another in the direction
of transport as shown in Figure 2c.
[0042] The joining unit 8 serially receives the shifted groups of three separate individual
folded onserts 20 from the separation unit 6 and merges them into a single lane, as
shown in Figure 2d, by means of a combination of three twisting units 30, which change
the orientation of the three separate individual onserts 20 in each group as they
transport them downstream. Two of the separate individual folded onserts 20 in each
group are initially merged into a single lane by two of the twisting units 30 and
the third individual folded onsert 20 in each group is then merged into this single
lane by the remaining twisting unit 30.
[0043] As shown in Figure 3, each twisting unit 30 comprises an elongate metal plate 32
that is twisted through an angle of approximately 90 degrees about its longitudinal
axis. A pair or rollers 34 with their axes of rotation (shown by a cross and a broken
line in Figure 3) approximately perpendicular to the longitudinal axis and parallel
to the surface of the metal plate 32 are mounted at either end of the metal plate
32. The rollers 34 are linked by an endless belt 36 of trapezoidal cross-section that
follows, and is in contact with, the twisted longitudinal surface of the metal plate
32 (for clarity, a portion of the endless belt 36 has been omitted from Figure 3).
[0044] Upon entry into the joining unit 8, each of the three individual folded onserts 20
in the staggered group formed by the separation unit 6 is fed between the metal plate
32 and the trapezoidal endless belts 36 of a respective one of the three twisting
units 30. The individual folded onserts 20 are held against and transported downstream
along the longitudinal surface of the metal plates 32 by the endless belts 36, which
are driven either by the separation unit 6 or by a second belt transport system 38
immediately upstream of the joining unit 8 and so, in use, have the same linear speed..
To minimise friction between the individual folded onserts 20 and the surface of the
metal plates 32, so that the individual folded onserts 20 slide smoothly along the
surface of the metal plates 32 as they are transported by the endless belts 36, the
metal plates 32 preferably have a structured surface. In addition, to ensure that
the individual folded onserts 20 are constantly and positively held between the endless
belts 36 and the metal plates 32 as they are transported, the longitudinal axis of
each metal plate 32 is slightly bowed or curved.
[0045] Since the longitudinal surfaces of the metal plates 32 are twisted through an angle
of approximately 90 degrees, the orientation of the individual folded onserts 20 relative
to the direction of travel also changes by the same amount as the individual folded
onserts 20 pass through the twisting units 30. Upon exiting the three twisting units
30, the re-orientated individual folded onserts 20 are merged into a single lane as
previously described above. As the three separate individual folded onserts 20 in
the group are shifted relative to one another in the direction of travel when they
enter the joining unit 8, they are spaced apart one behind the other as shown in Figure
2d when they are merged into the single lane as they exit the twisting units 30.
[0046] Upon exiting the joining unit 8, the longitudinally spaced apart individual folded
onserts 20 are transported downstream along a single lane to the alignment unit 10
by the second belt transport system 38. As shown in Figure 1, the second belt transport
system 38 comprises a turn module 40 downstream of the joining unit 8, which changes
the direction of the single lane by approximately 90 degrees from substantially vertical
to substantially horizontal, and a straight module 42, located between the turn module
40 and the alignment unit 10.
[0047] To avoid any slippage which could potentially damage the individual folded onserts
20, the turn module 40 comprises a single driven endless belt, which is bent through
90 degrees around the outside of a free roller. In use, the spaced apart individual
folded onserts 20 are transported between the endless belt and the free roller to
make the turn. The straight module 42 then transports the single lane of spaced apart
individual folded onserts 20 horizontally downstream to the alignment unit 10 between
a pair of driven endless belts. To ensure a constant pressure between the pair of
belts and so prevent slippage, the transport portion of the belts is advantageously
deviated by a pair of support rollers 44.
[0048] As the separate individual folded onserts 20 are transported through the modular
system 2 upstream of the alignment unit 10, slight changes in position of the separate
individual folded onserts 20 between pairs of endless belts can occur. In order to
correct any such changes, the separate individual folded onserts 20 are transported
along a guide rail 46 within the alignment unit 10, which is shown in more detail
in Figure 4.
[0049] As shown in Figure 4, the alignment unit 4 comprises an elongate metal plate 48 along
which the guide rail 46 is mounted. A pair of rollers 50 are mounted at either end
of the metal plate 48 with their axes of rotation (shown by the broken lines in Figure
4) substantially parallel to one another and perpendicular to the longitudinal axis
of the metal plate 48. The rollers 50 are linked by an endless belt 52 of circular
cross-section which extends along the metal plate 48 adjacent to the guide rail 46
(for clarity, a portion of the endless belt 52 has been omitted from Figure 4). The
endless belt 52 is positioned on the rollers 50 such that its longitudinal axis is
disposed at an acute angle to the axes of rotation thereof and to the longitudinal
axis of the elongate metal plate 48. In use, when the endless belt is driven this
"misalignment" of the endless belt 52 on the rollers 50 generates a lateral friction
that causes the endless belt 52 to rotate about its longitudinal axis, in the direction
shown by the arrow in Figure 4.
[0050] In the alignment unit 4 shown in Figure 4, the rollers 50 are in line with one another
and the "misalignment" of the endless belt 52 on the rollers 50 is created by mounting
the belt in grooves proximate opposed ends thereof. It will be appreciated, however,
that "misalignment" of the endless belt 52 on the rollers 50 could alternatively be
achieved by, for example, mounting the belt in central grooves on rollers that are
offset relative to one another in the transverse direction of the metal plate 48.
[0051] Upon entry into the alignment unit 10, the single lane of spaced apart individual
folded onserts 20 is fed between the metal plate 48 and the round endless belt 52,
which holds the individual folded onserts 20 against the metal plate 48 and transports
them downstream along its surface. As the spaced apart individual folded onserts 20
are transported longitudinally along the surface of the metal plate 48 by the driven
endless belt 52, the rotation of the endless belt 52 about its longitudinal axis also
transports them transversely across the surface of the metal plate 48 to the guide
rail 46 thereby laterally aligning them.
[0052] To minimise friction between the individual folded onserts 20 and the surface of
the metal plate 48, so that the individual folded onserts 20 slide smoothly across
the surface of the metal plate 48 as they are transported and aligned by the endless
belt 52, the metal plate 48 preferably has a structured surface. In addition, to ensure
that the individual folded onserts 20 are constantly and positively held between the
endless belt 52 and the metal plate 48, the longitudinal axis of the metal plate 48
is preferably slightly curved.
[0053] Upon exiting the alignment unit 10, the single lane of laterally aligned spaced apart
individual folded onserts 20 passes through a pressure roller unit 54 positioned between
the alignment unit 10 and the feeding unit 12, which advantageously improves the flatness
of the individual folded onserts 20, thereby allowing for smoother processing of the
individual folded onserts 20 in the hopper 14 and so more precise application of the
individual folded onserts 20 onto packaged consumer goods. The pressure roller unit
54 comprises a pair of parallel pressure rollers mounted substantially transverse
to the single lane of spaced apart individual folded onserts 20, between which the
spaced apart individual folded onserts 20 pass as they are transported downstream
from the alignment unit 10 to the feeding unit 12.
[0054] Having passed through the pressure roller unit 54, the flattened and laterally aligned
spaced apart individual folded onserts 20 are transported downstream in a single lane
to the feeding unit 12 at a linear speed typically in excess of 100m/min. As described
below, the feeding unit 12 stops the individual folded onserts 20 and stacks them
one at a time in the hopper 14. If desired, the feeding unit 12 may be used to stack
the individual folded onserts 20 in a cartridge or other receptacle instead of the
hopper 14.
[0055] To stop the individual folded onserts 20, the feeding unit 12 comprises a pair of
spiral wheels 56 of the type used in, for example, known machinery for counting bank
notes, having a plurality of spirally extending fingers that form slots in the periphery
thereof 56. The spiral wheels 56 are mounted directly above the hopper 14 in a spaced
apart relationship on a common shaft that, in use, is rotated in time relation to
the belt transport system that feeds the flattened and laterally aligned spaced apart
individual folded onserts 20 to the feeding unit 12. The slots on each spiral wheel
56 are aligned with the slots on the other spiral wheel 56 so that upon rotation of
the shaft, the spiral wheels 56 rotate with their slots in synchrony.
[0056] The single lane of individual folded onserts 20 is transported through the feeding
unit 12 to the top of spiral wheels 56, where the spaced apart individual folded onserts
20 are individually and sequentially directed tangentially into consecutive aligned
slots on the periphery of the pair of rotating spiral wheels 56. After the individual
folded onserts 20 enter the slots thereon, they are carried round to the top of the
hopper 14 by the rotation of the spiral wheels 56, which cause the individual folded
onserts 20 to decelerate as they move deeper into the spirally shaped slots.
[0057] As they reach the top of the hopper 14, the individual folded onserts 20 are forced
out of the slots on the rotating spiral wheels 56 and deposited in the hopper 14 by
a stripper mounted between the pair of spiral wheels 56, which engages the leading
edge of the individual folded onserts 20 thereby removing them from the rotating spiral
wheels 56.
[0058] In use, the hopper 14 advantageously acts as a buffer, where the folded onserts 20
are stacked before being fed further downstream to an application unit (not shown)
which applies them to the packaged consumer goods in a conventional manner. However,
the feeding unit 12 and the hopper 14 may alternatively be omitted and the single
lane of laterally aligned spaced apart coupons fed straight to an applicator for placement
directly onto the packaged consumer goods.
[0059] Two longitudinally spaced apart photocells 58 linked to the computer control system
are mounted in the upper region of the vertical hopper 14. In use these photocells
58 are used to detect the filling level of the hopper 14 and so, by way of the computer
control system, control the operation of the buckle folder 4. For example, if both
photocells 58 within the hopper 14 are covered by the stack of individual folded onserts
20 therein, the computer control system instructs the buckle folder 4 to stop drawing
sheets of pre-printed paper from the stacker 16. If, however, only the lower photocell
58 is covered by the stack of folded onserts 20 in the hopper 14, the computer control
system instructs the buckle folder 4 to operate slowly and only draw a sheet of pre-printed
paper from the stacker 16 on every second stroke. Finally, if both photocells 58 within
the hopper 14 are uncovered, the computer control system instructs the buckle folder
4 to draw sheets of pre-printed paper from the stacker 16 continuously.
[0060] While the invention has been exemplified above with reference to a system for producing
and transporting folded paper onserts, it will be appreciated that apparatus according
to the invention may also be employed to produce and transport any other kind of folded
coupon.
[0061] In the system described above the buckle folder produces triple width folded onserts
that are then cut to produce three separate individual onserts. It will also be appreciated,
however, that the system could alternatively comprise a buckle folder which produces
double width folded coupons that are cut to produce two separate individual coupons
or multiple width folded coupons that are cut to produce more than three separate
individual coupons which, following appropriate minor modifications to the separation
unit 6 and joining unit 8, may be transported downstream and merged into a single
lane as previously described.
[0062] The modular nature of the present system advantageously enables it to be readily
adapted to any packaging machinery layout. By positioning the various modules or units
in an appropriate manner, apparatus according to the present invention may be easily
configured to produce folded coupons and then transport them in any required direction
and over any required distance.
1. Apparatus for producing and transporting folded coupons comprising:
a buckle folder (4) for receiving and folding sheet material to produce a multiple
width folded coupon (18);
a cutter for cutting the multiple width folded coupon (18) to produce at least two
individual folded coupons (20) disposed in side-by-side relationship; and
a transport system (6) (8) for receiving the at least two individual folded coupons
(20) disposed in side-by-side relationship from the cutter and transporting the at
least two individual folded coupons (20) downstream along a transport axis,
characterised in that the transport system (6)(8) comprises at least two separate coupon transport paths
(28) disposed in side-by-side relationship that merge to form a single coupon transport
path, at least a portion of each separate coupon transport path (28) being twisted
about the transport axis,
wherein, in use, each of the at least two individual folded coupons (20) is transported
along a different one of the at least two separate coupon transport paths (28) such
that, when the at least two separate coupon transport paths (28) merge to form a single
coupon transport path, the at least two individual folded coupons (20) are displaced
(20) relative to one another along the transport axis.
2. Apparatus according to claim 1 wherein the at least two separate coupon transport
paths (28) are of different length.
3. Apparatus according to claim 1 or 2 wherein the at least two individual folded coupons
are displaced relative to one another along the transport axis upstream of the twisted
portions of the separate coupon transport paths.
4. Apparatus according to claim 1, 2 or 3 further comprising a turning unit (40) mounted
downstream of the transport unit (6)(8) for receiving the at least two individual
folded coupons (20) from the transport unit (6) (8) along the transport axis and transporting
the at least two individual folded coupons (20) downstream along a second transport
axis substantially perpendicular thereto, the turning unit (40) comprising a single
driven belt and a free roller between which, in use, at least two individual folded
coupons (20) are transported.
5. Apparatus (30) for changing the orientation of transported laminar articles (20),
the apparatus comprising:
an elongate fixed surface (32) twisted about its longitudinal axis; and
a driven belt (36) mounted such that it follows and is in contact with the elongate
fixed surface (32),
whereby, in use, laminar articles (20) held between the belt (36) and the elongate
fixed surface (32) are transported longitudinally along the elongate fixed surface
(32) by the driven belt (36).
6. Apparatus (30) according to claim 5 wherein the elongate fixed surface (32) is twisted
through an angle of approximately 90° about its longitudinal axis.
7. Apparatus (30) according to claim 5 or 6 wherein the longitudinal axis of the elongate
fixed surface (32) is bowed.
8. Apparatus (30) according to claim 5, 6 or 7 wherein the driven belt (36) is substantially
trapezoidal in cross-section.
9. Apparatus (30) according to any of claims 5 to 7 wherein the elongate fixed surface
is a metal plate with a structured surface.
10. Apparatus according to claim 1 wherein each of the at least two separate coupon transport
paths (28) of the transport system (6)(8) comprises apparatus (30) according to any
of claims 5 to 9.
11. Apparatus (10) for aligning transported laminar articles (20), the apparatus comprising:
an elongate fixed surface (48);
a guide (46) extending along the elongate fixed surface (48);
a driven belt (52) extending along the elongate fixed surface (48) proximate the guide
(46); and
a pair of rollers disposed at either end of the belt (52),
wherein the belt (52) is mounted on the rollers with its longitudinal axis inclined
at an acute angle to the axes of rotation thereof such that, in use, the belt (52)
rotates about its longitudinal axis as it is driven,
whereby, in use, laminar articles (20) held between the belt (52) and the elongate
fixed surface (48) are transported longitudinally along the elongate fixed surface
(48) by the driven belt (52) and concurrently transversely aligned against the guide
(46) by rotation of the driven belt (52) about its longitudinal axis.
12. Apparatus (10) according to claim 11 wherein the driven belt (52) is substantially
circular in cross-section.
13. Apparatus (10) according to claim 11 or 12 wherein the elongate fixed surface is a
metal plate with a structured surface.
14. Apparatus for stacking a stream of transported laminar articles (20) into a receptacle
(14), the apparatus comprising:
alignment apparatus (10) according to any of claims 11 to 13 for aligning the stream
of transported laminar articles (20);
a receptacle (14) downstream of the alignment apparatus (10) for receiving a stack
of the laminar articles (20); and
a feeder (12) mounted between the alignment apparatus (10) and the receptacle (14)
for receiving the aligned stream of transported laminar articles from the alignment
apparatus (10) and stacking the laminar articles individually in the receptacle (14).
15. Apparatus according to claim 14 wherein the feeder (12) comprises at least one wheel
(56) having a plurality of slots defined in the periphery thereof that, in use, receive
the laminar articles (20).
16. Apparatus according to claim 14 or 15 further comprising a pair of pressure rollers
mounted between the alignment apparatus (10) and the feeder (12), between which, in
use, the aligned stream of lamina articles (20) is transported.
17. A modular system (2) for producing, transporting and stacking folded coupons (20)
comprising:
apparatus according to claim 1, 2, 3, 4 or 10 for producing and transporting the folded
coupons; and
apparatus according to any of claims 14 to 16 for stacking the transported folded
coupons into a receptacle.