Field of the Invention
[0001] The present invention generally relates to the field of packaging, particularly for
tobacco products. More particularly, the present invention relates to a new type of
cigarette packaging, and blanks used in the construction of such packaging.
Background to the Invention
[0002] It is an ongoing requirement to improve the ergonomic and practical design of packaging.
One area in which such a requirement is prevalent is the provision of a packaging
for tobacco products such as cigarette packaging.
[0003] Cigarette packaging must meet a range of challenging requirements. In particular,
not only should the packaging be cheap and capable of mass production, but it should
also be sufficiently robust to keep the cigarettes safe, maintain their freshness
and retain its integrity over multiple sequences of opening and closing the packaging.
[0004] Perhaps the most common design for cigarette packaging today can be characterised
as a hinged lid pack. In this design, a cardboard pack is provided with a hinged lid
integrally formed at an upper end. The cigarettes are disposed longitudinally such
that a user may remove the cigarettes by their ends when the lid is open.
[0005] It is of course desirable that the hinged lid does not open without active user input.
In one design an inhibition on movement of the lid between a closed position and an
open position is achieved by the use of a collar or sleeve over which the lid must
pass. The sleeve is designed such that as the lid opens (or closes) an element of
friction is introduced between the lid and sleeve which must be overcome if the lid
is to be moved further.
[0006] In alternative designs, a locking element may additionally or alternatively be used.
For example, a locking element may be mounted to the pack in such a manner that as
the lid is opened it engages with an engagement portion of the lid. The engagement
of the locking element can inhibit movement unless the user overcomes the resistive
force that results.
[0007] While the above solutions and others have found some success in the context of hinged
lid packs, they are not appropriate for other design concepts. For example, it has
been proposed to provide cigarette packaging with slide or swing opening mechanisms.
In such an approach, an inner packet part which holds the cigarettes is disposed within
an outer packet part. In a closed position, an opening of the inner packet part is
covered by the outer packet part, while the inner packet part is movable relative
to the outer packet part to an open position in order to allow access to the cigarettes
stored within.
[0008] In a slide arrangement, the inner packet part moves relative to the outer packet
part with a linear motion, while in a swing arrangement the inner packet part moves
relative to the outer packet part with motion comprising at least some rotation. In
these arrangements, as well as in others, there is an ongoing desire to provide some
control over the relative movement of the inner packet part and the outer packet part
to avoid unwanted opening of the packaging.
Summary of the Invention
[0009] According to a first aspect of the present invention, there is provided packaging,
comprising: an outer packet part; an inner packet part disposed within the outer packet
part, the inner packet part being movable relative to the outer packet part between
a first position and a second position; and
at least one locking mechanism comprising a locking element and an engagement portion,
wherein the locking element projects from the inner packet part and the engagement
portion protrudes from an internal surface of the outer packet part facing the inner
packet part, wherein the locking element and the engagement portion are arranged such
that movement of the inner packet part between the first position and the second position
is effective to engage the locking element and the engagement portion at a first edge
of the engagement portion and to subsequently disengage the locking element and the
engagement portion at a second edge of the engagement portion.
[0010] The present invention can provide packaging in which spontaneous movement of an inner
packet part relative to an outer packet part is inhibited. As the locking element
passes the engagement portion it engages and then disengages with the engagement portion.
Between engaging the engagement portion at a first edge and disengaging at a second
edge, the locking element may travel across the surface of the engagement portion.
This engagement of the locking element causes resistance to the movement of the inner
packet part relative to the outer packet part. As the locking element also disengages
during movement between positions, the reverse movement can also be effective to re-engage
the locking element. As such, movement can be inhibited in both directions. The first
and second positions may, for example, be a closed position in which access to the
contents of the packaging is not possible and an open position in which the user may
access the contents.
[0011] In preferred embodiments, the locking element is concealed by the outer packet part
in one or both of the first position and the second position. Preferably, the locking
element is concealed by the outer packet part both in the first position and in the
second position. In this manner, the operation of the locking element is hidden from
the user. This increases the effectiveness of the sensation provided by the locking
element.
[0012] In preferred embodiments, the locking element and the engagement portion are configured
such that at least disengagement of said locking element and engagement portion generates
a sound, preferably a sound which is audible to the user. Preferably, the locking
element is arranged to generate a sound when the inner packet part reaches the first
position and/or when the inner packet part reaches the second position. This can provide
a signal to the user that the inner packet part has reached the desired position.
This increases confidence in the operation of the packaging, particularly when a sound
is generated when the inner packet part reaches a closed position.
[0013] Preferably, the sound is generated by elastic release of said locking element from
said engagement portion. For example, the locking element may be arranged to generate
the sound by striking against one of the opposing faces of the inner packet part when
released from engagement with the engagement portion. In particular, the locking element
may be biased against the opposing face and the first and/or second engagement portions
may comprise a raised area of said face. Accordingly, as the locking element passes
over the edge of such a raised area it is released to strike against the face.
[0014] In preferred embodiments the engagement portion comprises at least one engagement
flap folded in position above an inner face of the outer packet part to form a raised
portion on said inner surface, wherein a first edge of the engagement portion is formed
by a fold of said engagement flap and a second edge is formed by a distal end of said
engagement flap. This provides an effective formation of the engagement portion which
can thus be integrally formed with the remainder of the outer packet part. In preferred
embodiments, a debossed region is provided adjacent to said distal end of said engagement
flap. This causes an indentation which more clearly defines the engagement portion.
[0015] Preferably, the locking element is cut from a corner portion of the inner packet
part such that its distal edge projects from the inner packet part. In this way, the
locking element can project into a space between the inner packet part and the outer
packet part, while being formed relatively simply from the inner packet part.
[0016] Preferably, the packaging comprises a second locking mechanism, wherein the first
locking mechanism is disposed on a first side of the packaging and the second locking
mechanism is disposed on a second side of the packaging. In particularly preferred
embodiments, the first and second sides of the packaging are opposing sides.
[0017] The first and second sides of the packaging can either be the upper and lower sides
or the front and back sides of it. In practice, having locking mechanism on opposite
sides of the packaging further improves stability of inner and outer parts of the
packaging relative to each other. By providing locking mechanisms on more than one
side of the packaging, preferred embodiments can improve the locking effect of the
present invention. The second locking mechanism preferably comprises the same features
as the first locking mechanism and may thus operate in an analogous manner.
[0018] Preferably, the first locking mechanism is offset from the centre of the first side
of the packaging in a first direction and the second locking mechanism is offset from
the centre of the second side of the packaging in a second direction opposite to the
first direction. In particularly preferred embodiment, the offset of the first and
second locking mechanisms is equal in magnitude. Accordingly, in preferred embodiment,
the locking mechanisms can be located away from a centre of the packaging, which may
be required for other purposes, while retaining an overall balance in the operation
of the mechanisms.
[0019] Preferably, the present invention further comprises a restraining mechanism arranged
to limit movement of the inner packet part relative to the outer packet part. In particular,
the restraining mechanism may prevent movement of the inner packet part beyond the
first and/or second positions.
[0020] In preferred embodiments, the restraining mechanism comprises a first restraining
element and a second restraining element provided on opposing faces of the inner packet
part and the outer packet part, wherein engagement of the first and second elements
is effective to limit movement of the inner packet part relative to the outer packet
part.
[0021] Preferably, the first restraining element is a restraining tab and the second restraining
element is arranged to receive the restraining tab between the second restraining
element and a face of the inner packet part or the outer packet part. The second restraining
element may, for example, comprise a restraining flap folded inwardly from the face
of the outer packet part or inner packet part, or may comprise a restraining portion
which allows ingress of the restraining tab into a position between the restraining
element and the face of the inner packet part or outer packet part.
[0022] In preferred embodiments, the outer packet part comprises at least one opening or
recess through which one can push or pull the inner packet part to initiate movement
of the inner packet part relative to the outer packet part. This allows easy opening
and/or closing of packaging by a user.
[0023] Preferably, longitudinal edges of the packaging when the inner packet part is in
a closed position have a curved profile. This provides a pleasing configuration for
the user, and in particular improves comfort in the user's hand. It further reduces
the risk of damage to the vessel in which the packaging is carried, such a user's
pocket or bag that might otherwise result from sharp edges of the packaging.
[0024] In preferred embodiment, the relative movement of the inner packet part and the outer
packet part occurs substantially parallel to the opposing faces on which the locking
mechanism is provided. In particular, movement of the inner packet part from the first
position to the second position may comprise linear movement. Alternatively or additionally,
movement of the inner packet part from the first position to the second position may
comprise rotational movement.
[0025] Preferably, at least one engagement portion is provided on the outer packet part.
Similarly, in preferred embodiments, at least one locking element is provided on the
inner packet part. This arrangement is found to offer an effective and reliable engagement
between the locking element and the engagement portion.
[0026] In preferred embodiments, the inner packet part comprises at least one opening in
an upper face to allow access to a product in the inner packet part, wherein the opening
is concealed by the outer packet part when the inner packet part is in the first position.
Accordingly, the first position is a closed position in which access to the product
is not possible. In the second, open position, the outer packet part does not conceal
the opening. More generally, the opening may be placed on any face through which it
is desired to provide access to the contents of the inner packet part.
[0027] Preferably, the opening of the inner packet part extends into at least one side of
the inner packet part. This arrangement further facilitates user access to products
within the inner packet part.
[0028] In preferred embodiments, the inner packet part and the outer packet part are each
obtained from a single foldable blank of paper, cardboard, plastic material or a combination
thereof. Indeed, the present invention further encompasses blanks for use in the production
of the inner packet part and the outer packet part. Furthermore, the invention comprises
forming the inner packet part or the outer packet part from such blanks.
Brief Description of the Figures
[0029] Preferred embodiments of the present invention will now be described by way of example
only with reference to the accompanying drawings, in which:
Figure 1A shows a first preferred embodiment of the present invention in a closed
position;
Figure 1 B shows the first preferred embodiment in an open position;
Figure 2A is a side view of a front of an outer packet part of the first preferred
embodiment;
Figure 2B is a side view of a rear of the outer packet part of the first preferred
embodiment;
Figure 3 shows a blank for use in the production of the outer packet part of the first
preferred embodiment;
Figure 4A is a side view of a front of an inner packet part of the first preferred
embodiment;
Figure 4B is a side view of a rear of the inner packet part of the first preferred
embodiment;
Figure 5 shows a blank for use in the production of the inner packet part of the first
preferred embodiment;
Figure 6A is a side view illustrating the position of the inner packet part within
the outer packet part when in a closed position;
Figure 6B is a side view illustrating the position of the inner packet part within
the outer packet part when in an intermediate position as the inner packet part is
moved from the closed position towards an open position;
Figure 6C is a side view illustrating the position of the inner packet part within
the outer packet part when in the open position;
Figure 6D is a side view illustrating the position of the inner packet part within
the outer packet part when in the intermediate position as the inner packet part is
moved from the open position towards the closed position;
Figure 7A shows a cross section of the first preferred embodiment from above when
the inner packet part is in the closed position;
Figure 7B shows a cross section of the first preferred embodiment from above when
the inner packet part is in the open position;
Figure 8 shows a second preferred embodiment of the present invention in a closed
position;
Figure 9 shows the second preferred embodiment in an open position;
Figure 10 is a side view of a front of an outer packet part of the second preferred
embodiment;
Figure 11 shows a blank for use in the production of the outer packet part of the
second preferred embodiment;
Figure 12 is a side view of a front of an inner packet part of the second preferred
embodiment;
Figure 13 shows a blank for use in the production of the inner packet part of the
second preferred embodiment;
Figure 14A is a side view illustrating the position of the inner packet part within
the outer packet part when in a closed position; and
Figure 14B is a side view illustrating the position of the inner packet part within
the outer packet part when in the open position.
Detailed Description
[0030] Referring to Figures 1A and 1B, there is shown a first preferred embodiment of packaging
1 according to the present invention. The packaging comprises an outer packet part
100 and an inner packet part 150. The inner packet part 150 is movable relative to
the outer packet part and in particularly is slidable between a first, closed position
as illustrated in Figure 1A and a second, open position as shown in Figure 1 B.
[0031] The user may effect sliding of the inner packet part 150 by pushing the part of the
inner packet part 150 that is exposed through an opening 111 in the outer packet part
100 with a thumb or finger. As can be seen in Figure 1 B, the inner packet part 150
comprises a tear strip 152 which can be removed to form an opening in the inner packet
part 150 to expose cigarettes 170.
[0032] The outer packet part 100 and the inner packet part 150 are coupled to each other
in such a way as to provide an audible noise when the pack enters either the closed
position or the open position. Furthermore, a degree of resistance is provided to
retain the inner packet part in the open position and in the closed position. In this
manner, accidentally movement of the outer pack 100 relative to the inner packet part
150 can be inhibited. The mechanism by which these effects are produced can be understood
with reference to Figures 2A to 5, and will be described in greater detail below.
[0033] Figures 2A, 2B and 3 illustrate the outer packet part 100. The outer packet part
is formed by folding a cardboard blank, illustrated in Figure 3. Figure 2A shows a
front side view of the outer packet part, while Figure 2B shows a rear side view of
the outer packet part 100.
[0034] The outer packet part 100 comprises a front face 101a and a rear face 101b which
oppose each other when the outer packet part 100 is formed. The front face 101a and
the rear face 101b are connected by a side face 105. The opening 111 is formed in
the side face 105. Furthermore, a front strengthening flap 106a and a rear strengthening
flap 106b are formed towards the front and rear of the opening 111 respectively. When
the outer packet part 100 is formed, the strengthening flaps 106a, 106b are folded
inwardly and glued to the inner front and rear faces 101a, 101b of the outer packet
part 100, as illustrated in Figures 2A and 2B.
[0035] A top face of the outer packet part 100 is formed of front top face part 102a, rear
top face part 102b and side top face part 102c. When the outer packet part 100 is
formed, rear top face part 102b and side top face part 102c are glued to an underside
of front top face part 102a. Similarly, a bottom face of the outer packet part is
formed of front bottom face part 103a, rear bottom face part 103b and side bottom
face part 103c. When the outer packet part is formed, rear bottom face part 103b and
side bottom face part 103c are glued to a top side of front bottom face part 103a.
[0036] The outer packet part 100 further comprises a front restraining flap 107a and a rear
restraining flap 107b, which extend from the front face 101a and the rear face 101b
respectively. Furthermore, a front engagement flap 108a and a rear engagement flap
108b extend from the front restraining flap 107a and rear restraining flap 107b.
[0037] When the outer packet part is formed, the front restraining flap 107a and the rear
restraining flap 107b are folded inwardly while the engagement flaps 108a, 108b are
folded back upon the restraining flaps 107a, 107b. This is illustrated in Figures
2A and 2B. As a result, the engagement flaps 108a, 108b form a raised platform on
the inner surface of the outer packet part which acts as an engagement portion as
will be described in further detail below.
[0038] The engagement flaps 108a, 108b are preferably glued to the restraining flaps 107a,
107b in the positions shown in figures 2A and 2B. Similarly, the restraining flaps
107a, 107b underneath the engagement flaps are preferably glued to the front and rear
faces 101a, 101b of the outer packet part. However, the glue preferably does not extend
across the entirety of the restraining flaps 107a, 107b, but instead is arranged so
as to allow material to enter between the flaps 107a, 107b and the faces 101a, 101b
in a region away from the engagement flaps 108a, 108b.
[0039] Additionally, the first restraining flap 107a and the second restraining flap 107b
comprise a first debossed region 109a and a second debossed region 109b respectively.
The debossed regions 109a, 109b form indents in the restraining flaps 107a, 107b and
are located so that they are adjacent to the distal ends of the engagement flaps 108a,
108b when these are folded over as shown in Figures 2A and 2B.
[0040] Figures 4A, 4B and 5 illustrate the inner packet part 150. The inner packet part
150 is formed by folding a cardboard blank, illustrated in Figure 5. Figure 4A shows
a front side view of the inner packet part 150, while Figure 4B shows a rear side
view of the inner packet part 150.
[0041] The inner packet part 150 comprises a front face 151a and a rear face 151b which
oppose each other when the inner packet part 150 is formed. The front face 151a and
the rear face 151b are connected by a base face 156. A first side face is formed of
a front first side flap 154a and rear first side flap 154b, while a second side face
is formed of a front second side flap 155a and a rear side face flap 155b. The rear
side face flaps 154b, 155b are glued to inner surfaces of the front side flaps 154a,
155a to form front and rear sides of the inner packet part 150.
[0042] Base flaps 157 are connected to the first and second rear side flaps 154b, 155b.
When the inner packet part 150 is formed, the base flaps are glued to an upper surface
of the base face 156.
[0043] A top face of the inner packet part is formed of a rear top face flap 153b, a front
top face flap 153a, a rear tear strip flap 152b and a front tear strip flap 152a.
The front and rear top face flaps 152a, 152b are glued together to form a permanent
portion of the top face of the inner packet part 150. The front and rear tear strip
flaps 152a, 152b are glued together to form the tear strip 152 shown in Figure 1 B.
The front and rear tear strip flaps are connected to the remainder of the inner packet
part 150 by perforations, allowing the user to remove the tear strip 152 when they
wish.
[0044] The inner packet part further comprises a front locking element 161a and a rear locking
element 161b. The locking elements 161a, 161b are disposed in cut away portions 160a,
160b located at the junctions between the front and rear faces 151a, 151b and the
second side face. When the inner packet part 150 is formed, the locking elements 161a,
161b project beyond the front and rear faces 151a, 151b. It is noted that front locking
element 161a is disposed in an upper portion of the front face 151a, while the rear
locking element 161b is disposed in a lower portion of the rear face 151b. More generally,
the front locking element 161a and rear locking element 161b are preferably disposed
in different regions of the front and rear faces 151a, 151b, and in particular are
offset in opposing directions from a centre of the front and rear faces 151a, 151b
between the base face 156 and the opposing end of the front and rear faces 151a, 151b.
[0045] Additionally, the inner packet part comprises a front restraining tab 159a and a
rear restraining tab 159b. The restraining tabs 159a, 159b are disposed in cut away
portions 158a, 158b of the front face 151a and rear face 151b respectively. It is
noted that front restraining tab 159a is disposed in a lower portion of the front
face 151a, while the rear restraining tab 159b is disposed in an upper portion of
the rear face 151b. More generally, the front restraining tab 159a and rear restraining
tab 159b are preferably disposed in different regions of the front and rear faces
151a, 151b, and in particular are offset in opposing directions from a centre of the
front and rear faces 151a, 151b between the base face 156 and the opposing end of
the front and rear faces 151a, 151b.
[0046] The operation of the package 1 can be understood with reference to Figures 6A to
6D, which show the position of the inner packet part 150 relative to the outer packet
part 100 from a front view during movement between the closed and open positions,
and also with reference to Figures 7A and 7B, which show a plan view through the cross
sections A-A in Figures 6A and 6C. In Figures 6A to 6D features of the outer packet
part 100 which are not visible are shown in dashed lines, while those of the inner
packet part 150 that are not visible are shown in dotted lines.
[0047] Figures 6A and 7A show the inner packet part 150 in a closed position relative to
the outer packet part 100. In this position, the locking elements 161a, 161b are disposed
away from the engagement flaps 108a, 108b, as best seen from figure 7A. The locking
elements 161a, 161b project perpendicularly outwardly from the front and rear faces
151a, 151b of the inner packet part 150, thus occupying a space between the inner
packet part 150 and the outer packet part 100.
[0048] As the user moves the inner packet part from the closed position shown in Figures
6A and 7A, the locking elements 161a, 161b approach the engagement flaps 108a, 108b.
As the engagement flaps protrude above the inner surface of the outer packet part
100, after a certain amount of movement the locking elements make contact and engage
with the engagement flaps 108a, 108b. Further movement of the inner packet part 150
causes the locking elements to continue their engagement with the engagement flaps
108a, 108b, rubbing along the top surface of the engagement flaps 108a, 108b. At this
stage, the locking elements are slightly deflected from the perpendicular orientation
relative to the front and rear faces 151a, 151b of the inner packet part 150. The
requirement to deflect the locking elements 161a, 161b from their original orientation
creates an inhibiting effect on the movement of the inner packet part 150 relative
to the outer packet part 100 when engagement of the locking elements 161a, 161b and
the engagement flaps 108a, 108b is initiated.
[0049] The inner packet part 150 is then moved relative to the outer packet part 100 further
to the open position, as shown in Figures 6C and 7B. As the inner packet part enters
the open position, the locking elements 161a, 161b move beyond the engagement flaps
108a, 108b and therefore disengage with the engagement flaps 108a, 108b. As a consequence,
the locking elements 161a, 161b, flick outwardly towards the inner surface of the
outer packet part 100. The debossed regions 109a, 109b receive the locking elements
161a, 161b at this point. As the locking elements 161a, 161b strike the surface of
the debossed regions 109a, 109b, an audible click is produced, to give confidence
to the user that the appropriate position has been reached.
[0050] Excessive opening of the inner packet part 150 relative to the outer packet part
100 is prevented by engagement of the restraining tabs 159a, 159b with the restraining
flaps 107a, 107b. In particular, the restraining tabs 159a, 159b are received between
the restraining flaps 107a, 107b and the front and rear faces 101a, 101b of the outer
packet part 100 respectively. Thus, when the front edges restraining flaps 107a, 107b
engage with the base of the restraining tabs 159a, 159b the inner packet part 150
can move no further relative to the outer packet part 100.
[0051] When the inner packet part 150 is moved from the open position shown in Figures 6C
and 7B towards the closed position, the tip of the locking elements 161a again engages
with the engagement flaps 109a, 109b, causing the locking elements 161a, 161b to be
deflected from an orientation perpendicular to the front and rear faces 151a, 151b
of the inner packet part 150 as shown in Figure 6D. As for movement from the closed
position, movement from the open position is therefore inhibited as it requires the
locking elements 161a, 161b to be deflected from their original positions.
[0052] As the inner packet part 150 enters the closed position, the locking elements 161a,
161b pass beyond the engagement flaps 108a, 108b, and flick outwardly to contact the
front and rear faces of the inner packet part 150. Again, this causes an audible click,
indicating to the user that the action has completed or is nearly complete.
[0053] A package according to a second preferred embodiment of the invention is illustrated
in Figures 8 and 9. Like the first embodiment, the package of the second embodiment
comprises an inner packet part 250 and an outer packet part 200. The inner packet
part 250 is movable relative to the outer packet part 200 and in particularly is rotatable
between a closed position as illustrated in Figure 8 and an open position as shown
in Figure 9.
[0054] The user may effect rotation of the inner packet part 250 by pushing the part of
the inner packet part 250 that is exposed through an opening 211 in the outer packet
part 200 with a thumb or finger. Although not shown in Figure 9, when the outer packet
part is in the open position, cigarettes held within the inner packet part 250 may
be accessed by the user.
[0055] The outer packet part 200 and the inner packet part 250 are coupled to each other
in such a way as to provide an audible noise when the pack enters either the closed
position or the open position. Furthermore, a degree of resistance is provided to
retain the inner packet part in the open position and in the closed position. In this
manner, accidentally movement of the outer packet part 200 relative to the inner packet
part 250 can be inhibited. The mechanism by which these effects are produced can be
understood with reference to Figures 10 to 14B, and will be described in greater detail
below.
[0056] Figures 10 and 11 illustrate the outer packet part 200. The outer packet part is
formed by folding a cardboard blank, illustrated in Figure 11. Figure 10 shows a front
side view of the outer packet part 200 once formed.
[0057] The outer packet part 200 comprises a front face 201a and a rear face 201b which
oppose each other when the outer packet part 200 is formed. The front face 201a and
the rear face 201b are connected by a side face 205. The opening 211 is formed in
the side face 205. Furthermore, a front strengthening flap 206a and a rear strengthening
flap 206b are formed towards the front and rear of the opening 311 respectively. When
the outer packet part 200 is formed, the strengthening flaps 205a, 205b are folded
inwardly and glued to the inner front and rear faces 201a, 201b of the outer packet
part 200, as can be seen in Figure 10.
[0058] A top face of the outer packet part is formed of front top face part 202a, rear top
face part 202b and side top face part 202c. When the outer packet part 200 is formed,
rear top face part 202b and side top face part 202c are glued to an underside of front
top face part 202a. Similarly, a bottom face of the outer packet part 200 is formed
of front bottom face part 203a, rear bottom face part 203b and side bottom face part
203c. When the outer packet part 200 is formed, rear bottom face part 203b and side
bottom face part 203c are glued to a top side of front bottom face part 203a.
[0059] The bottom face formed of the bottom face parts 203a, 203b, and 203c does not cover
the entire bottom surface of the outer packet part 200 when formed. The outer packet
part further comprises a connecting flap 204, which is foldably connected to the bottom
face part 203b. Unlike the bottom face part 203b, the connecting flap is separated
from the rear face 201b. As a result, when the outer packet part 200 is formed, the
connecting flap 204 is able to move rotationally relative to the rest of the outer
packet part 200. As will be described further below, the inner packet part 250 is
mounted to the connecting flap 204.
[0060] The outer packet part 200 further comprises a front restraining flap 208a and a rear
restraining flap 208b. Furthermore, a front engagement flap 208a and a rear engagement
flap 208b extend from the front restraining flap 207a and rear restraining flap 207b.
[0061] When the outer packet part is formed, the front restraining flap 207a and the rear
restraining flap 207b are folded inwardly while the engagement flaps 208a, 208b are
folded back upon the restraining flaps 207a, 207b. This is illustrated in Figures
10. As a result, the engagement flaps 208a, 208b form a raised platform on the inner
surface of the outer packet part 200 which acts as an engagement portion as will be
described in further detail below.
[0062] The engagement flaps 208a, 208b are preferably glued to the restraining flaps 207a,
207b in the positions shown in Figure 10. Similarly, the restraining flaps 207a, 207b
underneath the engagement flaps are preferably glued to the front and rear faces 201a,
201b of the outer packet part. However, the glue preferably does not extend across
the entirety of the restraining flaps 207a, 207b, but instead is arranged so to allow
material to enter between restraining portions 210a, 210b of the restraining flaps
207a, 207b and the faces 201a, 201b in a region away from the engagement flaps 208a,
208b.
[0063] Additionally, the first restraining flap 207a and the second restraining flap 207b
comprise a first debossed region 209a and a second deboseed region 209b respectively.
The debossed regions 209a, 209b form indents in the restraining flaps 207a, 207b and
are located so that they are adjacent to the distal ends of the engagement flaps 208a,
208b when these are folded over as shown in Figure 10.
[0064] Figures 12 and 13 illustrate the inner packet part 250 of the second embodiment.
The inner packet part 250 is formed by folding a cardboard blank, illustrated in Figure
13. Figure 12 shows a front side view of the inner packet part 250 once formed.
[0065] The inner packet part 250 comprises a front face 251a and a rear face 251b which
oppose each other when the inner packet part 250 is formed. The front face 251a and
the rear face 251b are connected by a base face 256. A first side face is formed of
a front first side flap 254a and rear first side flap 254b, while a second side face
is formed of a front second side flap 255a and a rear side face flap 255b. The rear
side face flaps 254b, 255b are glued to inner surfaces of the front side face flaps
254a, 255a to form front and rear sides of the inner packet part 250.
[0066] Base flaps 257 are connected to the first and second rear side flaps 254b, 255b.
When the inner packet part 250 is formed, the base flaps are glued to an upper surface
of the base face 256.
[0067] The inner packet part 250 has an open top. Front reinforcing flap 253a and rear reinforcing
flap 253b are connected to upper edges of the front and rear faces 251a, 253b respectively,
and are folded inwardly.
[0068] The inner packet part further comprises a front locking element 261a and a rear locking
element 261b. The locking elements 261a, 261b are disposed in cut away portions 260a,
260b located at the junctions between the front and rear faces 251a, 251b and the
second side face. When the inner packet part 250 is formed, the locking elements 261a,
261b project beyond the front and rear faces 251a, 251b.
[0069] Additionally, the inner packet part comprises a front restraining tab 259a and a
rear restraining tab 259b. The restraining tabs 259a, 259b are disposed in cut away
portions 258a, 258b of the front face 251a and rear face 251b respectively. The operation
of the package can be understood with reference to Figures 14A and 14B, which show
the position of the inner packet part 250 relative to the outer packet part 200 from
a front view in both the closed position of Figure 8 and the open position of Figure
9. In Figures 14A and 14B, features of the outer packet part 200 not visible are shown
in dashed lines, while features of the inner packet part 250 that are not visible
are shown in dotted lines.
[0070] Figure 14A shows the inner packet part 250 in a closed position relative to the outer
packet part 200. In this position, the locking elements 261a, 161b are disposed away
from the engagement flaps 208a, 208b, as best seen from Figure 7A. The locking elements
261a, 261b project perpendicularly outwardly from the front and rear faces 251a, 251b
of the inner packet part 250, thus occupying a space between the inner packet part
250 and the outer packet part 200.
[0071] As the user moves the inner packet part from the closed position shown in Figure
14A, the locking elements 261a, 261b approach the engagement flaps 208a, 208b. As
the engagement flaps protrude above the inner surface of the outer packet part 200,
after a certain amount of movement the locking elements make contact and engage with
the engagement flaps 208a, 208b. Further movement of the inner packet part 250 causes
the locking elements to continue their engagement with the engagement flaps 208a,
208b, rubbing along the top surface of the engagement flaps 208a, 208b. At this stage,
the locking elements 261a, 261b are slightly deflected from the perpendicular orientation
relative to the front and rear faces 1251a, 251b of the inner packet part 250. The
requirement to deflect the locking elements 261a, 261b from their original orientation
creates an inhibiting effect on the movement of the inner packet part 250 relative
to the outer packet part 200 when engagement of the locking elements 261a, 261b and
the engagement flaps 208a, 208b is initiated.
[0072] The inner packet part 250 is then moved relative to the outer packet part 200 further
to the open position, as shown in Figures 6C and 7B. As the inner packet part enters
the open position, the locking elements 261a, 261b move beyond the engagement flaps
208a, 208b and therefore disengage with the engagement flaps 208a, 208b. As a consequence,
the locking elements 261a, 261b, flick outwardly towards the inner surface of the
outer packet part 200. The debossed regions 209a, 209b receive the locking elements
261a, 261b at this point. As the locking elements 261a, 261b strike the surface of
the debossed regions 209a, 209b, an audible click is produced, to give confidence
to the user that the appropriate position has been reached.
[0073] Excessive opening of the inner packet part 250 relative to the outer packet part
200 is prevented by engagement of the front restraining tabs 259a with the restraining
flap 207a and of the rear restraining tab 259b with the restraining flap 207b. In
particular, the front restraining tab 259a is received between the restraining flap
207a and the front face 201a, while the rear restraining tab 259b is received through
the restraining portion 207b between the rear flap 208b and the rear face 201b of
the outer packet part 200. As a result, this engagement of the restraining tabs 259a,
259b prevents movement of the inner packet part 250 beyond the open position.
[0074] When the inner packet part 250 is moved from the open position shown in Figure 14B
towards the closed position, the locking elements 261a again engage with the engagement
flaps 209a, 209b, causing the locking elements 261a, 261b to be deflected from an
orientation perpendicular to the front and rear faces 251a, 251b of the inner packet
part 250. As for movement from the closed position, movement from the open position
is therefore inhibited as it requires the locking elements 261a, 261b to be deflected
from their original positions.
[0075] As the inner packet part 250 enters the closed position, the locking elements 261a,
261b pass beyond the engagement flaps 208a, 208b, and flick outwardly to contact the
front and rear faces of the inner packet part 250. Again, this causes an audible click,
indicating to the user that the action has completed or is nearly complete.
[0076] The above description relates to two particularly preferred embodiments of the invention,
but it will be appreciated that other implementations are possible. In particular,
the skilled person may modify or alter the particular geometry and arrangement of
the particular features of the packaging. Particularly, the respective positions of
the locking elements and engagement portions on the inner and outer packet parts can
easily be modified or inverted by the skilled person without affecting the functional
behaviour of the packaging of the invention. Other variations and modifications will
also be apparent to the skilled person. Such variations and modifications may involve
equivalent and other features which are already known and which may be used instead
of, or in addition to, features described herein. Features that are described in the
context of separate embodiments may be provided in combination in a single embodiment.
Conversely, features which are described in the context of a single embodiment may
also be provided separately or in any suitable subcombination.