A BLANK AND A RELATIVE PACKET OF CIGARETTES

Abstract: A cigarette packet (4) with a cross section of flattened oval profile is fashioned from a diecut blank (1) of essentially elongated rectangular outline referable to a longitudinal axis (16) and comprising, aligned along the axis (16), a central panel (17), two intermediate panels (18, 19) and two end panels (20, 21), each intermediate panel (18, 19) displaying a flattened oval outline and joined to the two contiguous panels (17, 20; 17, 21) along respective rectilinear borders (22) extending transversely to the longitudinal axis (16) and interconnected in pairs by way of respective arcuate borders (23) with no break in linear continuity. The central panel (17) and end panels (20, 21) each present a flat central longitudinal area (24) and two lateral longitudinal bands (25) rendered pliable and thus adaptable to the curvature described by the arcuate borders (23), which they are designed to meet when the packet (4) is erected.

Description: Description A blank and a relative packet of cigarettes Technical Field The present invention relates to a diecut blank for use in manufacturing of a packet of cigarettes. Background Art The prior art embraces a packet of rigid type as disclosed in European patent EP 0 545 723, to which reference may be made for a full description, intended to hold a group of cigarettes enveloped previously in a respective inner wrapper of metal foil paper. The packet comprises a container with an internal stiffening frame, also a lid hinged to the container and rotatable about the respective hinge line between an open position affording access to the container, and a closed position in which the lid fits snugly over the frame and is held thus stably in place. The packet in question presents a cross section of substantially flattened oval profile and is fashioned from ' a flat precreased diecut blank referable to a predominating axis disposed transversely to the axis of the finished packet and presenting a plurality of panels, aligned along the selfsame axis, destined to provide both the sides of the container and of the lid, and the internal frame. Also forming part of the blank are two pairs of end folds, each presenting an outline of substantially flattened oval profile, aligned in two sets of two along the aforementioned transverse axis and providing the elements by which the top end and bottom end faces of the packet are fashioned. Besides being unsuitable for use on today' s high speed packer machines, which will only handle blanks exhibiting a transverse dimension decidedly less than the longitudinal dimension, the type of blank described above can also be affected by the problem of incorrect mutual positioning between the outer wrapper and the inner wrapper. In effect, given the particular geometry of the blank, the packet is fashioned by bending the blank about an axis perpendicular to the transverse axis and rolling it gradually into a tube around the inner wrapper, interacting in the process with the selfsame inner wrapper, to the point of assuming the aforementioned substantially flattened oval profile. Thus, the inner wrapper functions to all intents and purposes as a mandrel around which the blank is formed by degrees. It has been found by experiment that this type of wrapping operation can occasion relative movement between the inner wrapper and the outer wrapper, resulting in the drawback mentioned above and consequently in a loss of the correct mutual positioning between the two wrappers. The object of the present invention is to overcome the above noted drawbacks. Disclosure of the Invention The stated object is realized according to the present invention in a blank for manufacturing a packet of cigarettes exhibiting a cross section of substantially flattened oval profile, characterized in that it presents a substantially elongated rectangular outline referable to a longitudinal axis parallel with the longitudinal axis of the relative packet and comprises, aligned along the selfsame axis, a central panel, two intermediate panels and two end panels, of which the intermediate panels each present a substantially flattened oval outline and are joined respectively to the two contiguous panels along rectilinear borders extending transversely to the longitudinal axis and interconnected in pairs by way of respective arcuate borders with no break in linear continuity, whilst the central panel and end panels present respective flat central longitudinal areas, terminating longitudinally in extremities that coincide with the rectilinear borders, and two respective lateral longitudinal bands designed to meet the intermediate panels along the arcuate borders . The invention will now be described in detail, by way of example, with the aid of the accompanying drawings, in which: -figures 1 to 3 illustrate three different types of blanks for the manufacture of respective packets of cigarettes according to the present invention, viewed in plan; -figures 4 to 6 illustrate three different types of blanks for the manufacture of respective frames to be associated with the respective types of blanks shown in figures 1 to 3; -figure 7 illustrates a packet of cigarettes fashioned, purely by way of example, from the blank of figure 3. With reference to figures 1, 2 and 3 of the drawings, 1 denotes a flat diecut blank, in its entirety, made of a wrapping material such as cardboard or the like, from which to fashion a packet; in particular, the blank 1 is associated with a respective stiffening frame 2 fashioned in its turn from a flat diecut blank 3, and formed into a relative cigarette packet 4 (see figure 7) referable to a predominating longitudinal axis 5, presenting a substantially flattened oval profile when seen in cross section and accommodating a group of cigarettes (not illustrated) . Referring to figure 7, the packet 4 is of rigid embodiment and comprises a container 6, surmounted by a lid 7 hinged to the selfsame container 6 along a crease line 8 and rotatable thus between an open position (not illustrated) , and a closed position in which the lid covers an open top end 9 of the container 6 and is retained in this same position by the frame 2. The packet 4 presents a top end face 10 and a bottom end face 11 of substantially flattened oval outline, and a lateral surface 12 including two mutually parallel flat portions denoted 13 and 14, front and rear respectively. The two flat portions 13 and 14 are interconnected by two arcuate portions 15. As illustrated in figures 1, 2 and 3, the blank 1 presents a substantially elongated rectangular outline referable to a longitudinal axis 16 and comprises, aligned along this same axis 16, a central panel 17, two intermediate panels 18 and 19 and two end panels of which one, denoted 20, is joined to the central panel 17 by way of one intermediate panel 18, and the other, denoted 21, joined to the central panel 17 by way of the other intermediate panel 19. The two intermediate panels 18 and 19 present a substantially flattened oval outline and are joined to the respective contiguous panels 20-17 and 21-17 along rectilinear borders 22 that extend transversely to the longitudinal axis 16 and are interconnected in corresponding pairs by respective arcuate borders 23 with no break in linear continuity. The central panel 17 and the end panels 20 and 21 each exhibit a central longitudinal area 24 of width equal to the length of the aforementioned rectilinear borders 22, so that the extremities of these same areas 24 coincide with the borders 22 along which the intermediate panels 18 and 19 are joined, also two lateral longitudinal bands 25 extending parallel to the central area 24 and designed, when the packet 4 is erected, to meet the intermediate panels 18 and 19 along the aforementioned arcuate borders 23 whereupon they are anchored to the selfsame panels 18 and 19 by means of flaps 26. In the example of figure 1 the flaps 26 are integral with the arcuate borders 23 of the intermediate panels 18 and 19 and embodied as a plurality of tongues 32 each presenting a substantially triangular outline and projecting radially from the selfsame arcuate border 23. In particular, the central longitudinal portion 24 of the central panel 17 coincides with the rear flat portion 14 of the packet 4, the central portions 24 of the end panels 20 and 21 coincide with the front flat portion 13 of the packet 4, and the intermediate panels 18 and 19 coincide respectively with the top end face 10 and with the bottom end face 11 of the packet 4. Finally, the lateral longitudinal bands 25 coincide with the arcuate portions 15 of the packet 4 and are secured one to another along a narrow overlap denoted 27. In contrast to the example of figure 1, the lateral longitudinal bands 25 in the examples of figures 2 and 3 are rendered pliable and thus made readily adaptable, when the packet 4 is erected, to the curvature of the arcuate borders 23 presented by the intermediate panels 18 and 19. In the example of figure 2 the lateral longitudinal bands 25 are rendered pliable and adaptable to the required curvature by means of an embossing operation denoted G. In this instance the flaps 26 present a rectangular outline and project from the arcuate borders 23 of the intermediate panels 18 and 19. In the example of figure 3 the lateral longitudinal bands 25 are rendered pliable and adaptable to the required curvature by means of an operation denoted P that consists in generating a plurality of crease lines 28. In this instance the flaps 26 are integral with the lateral bands 25 of the central panel 17 and extend parallel to the longitudinal axis 16. Importantly, the separation between the lateral longitudinal bands 25 and the central area 24 is not evidenced by a clear line of demarcation; rather, the bands 25 and the central area 24 merge with no break in continuity, so that the packet 4 can be fashioned without any ridges generated between the flat portions 13 and 14 and the arcuate portions 15. In the same manner as described for the packet blanks 1, the blanks 3 utilized for the frames 2 illustrated in figures 4, 5 and 6 present a central longitudinal area 29 that will be breasted with the central area 24 of the end panel 21, and two lateral longitudinal bands 30 that will be breasted in part with the lateral longitudinal bands 25 of the selfsame panel 21. More exactly, the lateral longitudinal bands 30 in the example of figure 5 are rendered pliable and adaptable to the required curvature by means of an embossing operation similar to that effected on the lateral bands 25 of the packet blank 1 and denoted G likewise on the frame blank 3, whereas the lateral longitudinal bands 30 in the example of figure 6 are rendered pliable and adaptable to the required curvature by means of an operation P that consists in generating a plurality of crease lines 31, the same as on the corresponding bands 25 of the blank illustrated in figure 3. Likewise in the case of the blanks 3 from which the frames 2 are fashioned, the separation between the lateral bands 30 and the central area 29 is not evidenced by a clear line of demarcation; rather, the bands 30 and the central area 29 merge with no break in continuity and are thus able to bond completely with the internal surface of the packet 4.

Claims: Claims 1) A diecut blank for manufacturing a packet of cigarettes exhibiting a cross section of substantially flattened oval profile, characterized in that it presents a substantially elongated rectangular outline referable to a longitudinal axis (16) parallel with the longitudinal axis (5) of the relative packet (4) and comprises, aligned along the selfsame axis (16), a central panel (17), two intermediate panels (18, 19) and two end panels (20, 21), of which the intermediate panels (18, 19) each present a substantially flattened oval outline and are joined respectively to the two contiguous panels (17, 20; 17, 21) along rectilinear borders (22) extending transversely to the longitudinal axis (16) and interconnected in pairs by way of respective arcuate borders (23) with no break in linear continuity, whilst the central panel (17) and end panels (20, 21) present respective flat central longitudinal areas (24), terminating longitudinally in extremities that coincide with the rectilinear borders (22) , and two respective lateral longitudinal bands (25) designed to meet the intermediate panels (18, 19) along the arcuate borders (23) . 2) A blank as in claim 1, wherein the lateral bands (25) are rendered pliable and thus adaptable to the curvature of the arcuate borders (23) . 3) A blank as in claim 2, wherein the lateral bands are rendered pliable and adaptable to the curvature by an embossing operation. 4) A blank as in claim 2, wherein the lateral bands are rendered pliable and adaptable to the curvature by an operation that consists in generating a plurality of longitudinal crease lines (28). 5) A blank as in claims 1 to 4, comprising flaps (26) by which the intermediate panels (18, 19) are connected to the respective central and end panels (17, 20, 21) . 6) A blank as in claim 5, wherein the flaps (26) are integral with the arcuate borders (23) of the intermediate panels (18, 19). 7) A blank as in claim 6, wherein the flaps (26) are of substantially rectangular outline and extend transversely to the longitudinal axis (16) . 8) A blank as in claim 6, wherein the flaps (26) consist in a plurality of tongues (32), each of substantially triangular outline, projecting radially from the arcuate border (23) . 9) A blank as in claim 5, wherein the flaps (26) are integral with the lateral bands (25) and extend parallel to the longitudinal axis (16). 10) A blank as in claims 1 to 9 for manufacturing a packet (4) of cigarettes of rigid type comprising a container (6), a lid (7) and a frame (2), wherein the frame (2) is fashioned from a respective flat diecut blank (3) presenting a central area (29) offered to the central longitudinal area (24) of one of the end panels (20, 21) and two respective lateral bands (30) offered to the lateral longitudinal bands (25) of one of the two end panels (20, 21). 11) A blank as in claim 10, wherein the lateral bands (30) of the blank (3) used for the frame (2) are rendered pliable so as to make them adaptable to the curvature of the arcuate borders (23) presented by the intermediate panels (18, 19) of the packet blank (1) . 12) A blank as in claim 10, wherein the lateral bands are rendered pliable and adaptable to the curvature by an embossing operation. 13) A blank as in claim 10, wherein the lateral bands are rendered pliable and adaptable to the curvature by an operation that consists in generating a plurality of longitudinal crease lines (31) .

Inventors: DRAGHETTI FIORENZO, GAMBERI STEFANO, DRAGHETTI, FIORENZO, GAMBERI, STEFANO
Applicants: DRAGHETTI FIORENZO, GAMBERI STEFANO, GD SPA, DRAGHETTI, FIORENZO, G.D S.P.A., GAMBERI, STEFANO
Application year: 2001
Main classification: B65D85
IPC codes: B65D5, B65D85