Patent Publication Number: US-7900770-B2

Title: Cigarette box and blank set for same

Description:
This application is a Continuation of copending PCT International Application No. PCT/JP2006/316742 filed on Aug. 25, 2006, which designated the United States, and on which priority is claimed under 35 U.S.C. §120. This application also claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 2005-260665 filed in Japan on Sep. 8, 2005. The entire contents of each of the above documents is hereby incorporated by reference. 
    
    
     TECHNICAL FIELD 
     This invention relates to a cigarette box and a blank set for the box, where the cigarette box is used to contain an inner pack and the inner pack includes a bundle of filter cigarettes or cigarettes and a wrapper wrapping the bundle. 
     BACKGROUND ART 
     For such cigarette boxes, so-called hinged lid packages are frequently used. As disclosed in Japanese Unexamined Patent Publication No. Hei 5-213340, for example, the package of this type has a box body and a lid for opening and closing the box body, and the inner pack is contained in the box body. 
     Common people including smokers have been long familiar with the above-described shape of the package. Thus, there is no freshness in the package opening and closing operation, and the package of this type is poor in such visual attraction that increases the user&#39;s buying motivation. 
     The primary object of the present invention is to provide a cigarette box having such novel opening and closing mode that can increase the user&#39;s buying motivation, and a black set for the box. 
     DISCLOSURE OF THE INVENTION 
     Means for Solving the Problem 
     In order to achieve the above object, the cigarette box according to the present invention comprises an inner case enclosing an inner pack and being partly open at the top thereof to provide an access opening at the top, and an outer case enclosing the inner case in the manner allowing the inner case to upwardly stick out, the outer case having a push window at the bottom thereof for exposing a bottom face of the inner case, and a hinged cap for opening and closing the access opening of the inner case, wherein when the inner case is pushed upward through the push window to stick out of the outer case, the hinged cap turns around a self hinge in the manner associated with the sticking-out of the inner case, thereby opening the access opening. 
     In the case of this cigarette box, when the user pushes up the inner case through the push window of the outer case, the inner case sticks out of the outer case. The inner case stuck out pushes the hinged cap upward, so that the hinged cap turns around the hinge. Consequently, the lid of the hinged cap moves away from the access opening of the inner case so that the access opening is opened. Thus, the user can take out a cigarette from the inner pack through the access opening and smoke the cigarette taken out. 
     After this, by pushing the inner case back into the outer case and turning the hinged cap reversely, the user can close the access opening of the inner case with the lid of the hinged cap. 
     The above-described cigarette box is greatly different in opening and closing mode compared with the common hinged lid packages, and provides a novel appearance. Thus, the cigarette box according to the present invention greatly increases the user&#39;s buying motivation. 
     Specifically, it can be configured such that the access opening of the inner case is disposed adjacent to one side face of the inner case, and the hinged cap includes a rear wall joined to one side wall of the outer case located on the same side as said one side face of the inner case, by means of the hinge, and when the hinged cap is in a closed position, forming an extension of the one side wall of the outer case, and a lid wall extending from the top edge of the rear wall, and when the hinged cap is in the closed position, covering the access opening of the inner case, wherein when the inner case is caused to stick out of the outer case, the inner case pushes the lid wall upward so that the hinged cap turns around the hinge, sideways of the outer case, up to an open position, thereby opening the access opening. 
     Desirably, the hinged cap should further include guide walls in a pair connecting opposite side edges of the lid wall with corresponding side edges of the rear wall, wherein when the hinged cap is in the closed position, one of the guide walls is held between the inner case and a front wall of the outer case and the other guide wall is held between the inner case and a rear wall of the outer case. In this case, desirably, the guide walls should have such size that ensures that the guide walls continue to be held between the inner case and the outer case when the hinged cap is caused to turn from the closed position to an open position. Such guide walls stabilize the turning, namely opening and closing of the hinged cap. 
     The cigarette box can further comprise a stopper for determining an amount by which the inner case sticks out of the outer case. Specifically, the stopper can include a downward-directed stop lug provided on an inner surface of the outer case, and an upward-directed engagement lug provided on an outer surface of the inner case, wherein when the inner case is caused to stick out of the outer case, the engagement lug engages with the stop lug, thereby preventing the inner case from sticking out further than intended. Desirably, the stopper should be provided between each side face of the inner case and the corresponding side wall of the outer case. Such stopper reliably prevents the inner case from coming off the outer case. 
     The present invention further provides a blank set for forming the cigarette box, and the blank set comprises an inner blank for forming the inner case, and an outer blank for forming the outer case. The details of the blanks will become clear from the attached drawings and description below. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  A perspective view showing an embodiment of a cigarette box in a closed state. 
         FIG. 2  A perspective view showing the cigarette box of  FIG. 1  in an open state. 
         FIG. 3  A diagram showing a blank for forming an inner case of  FIGS. 1 and 2 . 
         FIG. 4  A diagram showing a step of folding the blank of  FIG. 3 . 
         FIG. 5  A diagram showing the state after a further folding operation is performed on the blank in the state of  FIG. 4 . 
         FIG. 6  A diagram showing the state after a further folding operation is performed on the blank in the state of  FIG. 5 . 
         FIG. 7  A diagram showing the state after a further folding operation is performed on the blank in the state of  FIG. 6 . 
         FIG. 8  A diagram showing a blank for forming an outer case of  FIGS. 1 and 2 . 
         FIG. 9  A diagram showing the state after a first folding operation is performed on the blank of  FIG. 8 . 
         FIG. 10  A diagram showing the state after a further folding operation is performed on the blank in the state of  FIG. 9 . 
         FIG. 11  A diagram showing the state after an inner case is supplied onto the blank in the state of  FIG. 10  and the inner case causes further folding of the blank. 
         FIG. 12  A diagram showing the state after a further folding operation is performed on the blank in the state of  FIG. 11 . 
         FIG. 13  A diagram showing the blank viewed from direction XIII as indicated by an arrow in  FIG. 12 . 
         FIG. 14  A diagram showing the state after a further folding operation is performed on the blank in the state of  FIG. 12 . 
         FIG. 15  A diagram showing the state after a further folding operation is performed on the blank in the state of  FIG. 14 . 
         FIG. 16  A diagram showing the state after a further folding operation is performed on the blank in the state of  FIG. 15 . 
     
    
    
     BEST MODE OF CARRYING OUT THE INVENTION 
       FIGS. 1 and 2  show an embodiment of a cigarette box. 
     The cigarette box includes a parallelepiped inner case  2 . The inner case  2  contains an inner pack (omitted in  FIGS. 1 and 2 ). The inner pack includes a bundle of filter cigarettes or cigarettes and a wrapper wrapping the bundle. 
     The inner case  2  has an access opening  4  at the top thereof, and the access opening  4  is located adjacent to one side edge of the top of the inner case  2 . The inner case  2  is contained in a virtually parallelepiped outer case  8 . The outer case  8  is open at the top thereof. Thus, as shown in  FIG. 2 , the top face of the inner case  2  is exposed in the top opening of the outer case  8 . 
     The outer case  8  has a bottom wall, and a push window  10  is formed in the bottom wall. The push window  10  is located adjacent to a side edge of the bottom wall located on the opposite side to the access opening  4  so that the bottom wall of the inner case  2  is partly exposed. 
     The outer case  8  has further a hinged cap  12 , and the hinged cap  12  is joined to the outer case  8  by means of a self hinge  14 . 
     More specifically, a first side wall  8   a  of the outer case  8  located on the same side as the access opening  4  is smaller in height than a second side wall of the outer case  8  opposite to the first side wall, and the self hinge  14  connects the hinged cap  12  and the outer case  8  at the upper edge of the first side wall  8   a . The hinged cap  12  includes a rear wall  16  extending upward from the hinge  14 , and a lid  18  extending from the distal end of the rear wall  16 . The total height of the rear wall  16  and first side wall  8   a  is equal to the height of the second side wall of the outer case  8 . Thus, as shown in  FIG. 1 , when the hinged cap  12  is closed, the rear wall  16  forms an extension of the first side wall  8   a  to make up for the shortage in height of the first side wall  8   a  relative to the second side wall of the outer case  8 . 
     The lid  18  is at right angles to the rear wall  16 , and when the hinged cap  12  is in closed position as shown in  FIG. 1 , the lid  18  covers the access opening  4  of the inner case  2  from above, thereby closing the access opening  4 . The hinged lid  18  also has guide walls  20  in a pair, and the guide walls  20  connects the side edges of the lid  18  with the corresponding side edges of the rear wall  16 . When the hinged cap  12  is closed, one of the guide walls  20  is entirely and completely inserted between the front wall of the outer case  8  and the front wall of the inner case  2  while the other guide wall  20  is entirely and completely inserted between the rear wall of the outer case  8  and the rear wall of the inner case  2 . 
     In the case of the above-described cigarette box, the user can push up the inner case  2  by pressing a finger against the bottom of the inner case  2  through the push window  10 . Such pushing-up operation causes the inner case  2  to stick out of the outer case  8  upwardly. 
     When the inner case  2  is caused to stick out as shown in  FIG. 2 , the edge of the access opening  4  of the inner case  2  collides with the inner surface of the lid  18  of the hinged cap  12  and causes the hinged cap  12  to turn around the self hinge  14 , from closed position to open position. As the hinged cap  12  moves sideways toward the open position in this manner, the lid  18  moves away from the access opening  4  of the inner case  2  so that the access opening  4 , therefore, the cigarette box is opened. Thus, the user can take out a filter cigarette or cigarette from the inner pack contained in the inner case  2 , through the access opening  4 , and smoke the cigarette taken out. 
     Then, the user pushes the inner case  2  back into the outer case  8 , and then turns the hinged cap  12  reversely from the open position to the closed position, so that the access opening  4  of the inner case  2  is closed with the lid  18  of the hinged cap  12 . 
     As clear from  FIG. 2 , in spite of the hinged cap  12  movement from the closed position to the open position, the guide walls  20  in a pair of the hinged cap  12  are always held between the outer case  8  and the inner case  2 , at least in part, and prevented from completely coming out from between the cases  2  and  8 . Thus, when the hinged cap  12  is turned around the self hinge  14 , the guide walls  20  in a pair are guided by the cases  2 ,  8 , so that the hinged cap  12  is opened and closed smoothly and stably. 
     Further, as shown in  FIG. 1 , the inner case  2  has engagement lugs  22  on the lower portions of the opposite side walls thereof. The lugs  22  extend upward from the bottom of the inner case  2  along the corresponding side walls. Meanwhile, the outer case  8  has stop lugs  24  on the inner surfaces of the opposite side walls thereof, where the stop lugs  24  are located above the corresponding engagement lugs  22  and directed downward. Thus, when the inner case  2  is pushed upward from the outer case  8  as described above, the engagement lugs  22  collide with the corresponding stop lugs  24 , so that the stop lugs  24  limit the amount by which the inner case  2  sticks out of the outer case  8 . Thus, the inner case  8  is prevented from completely coming out of the outer case  8 . The engagement lugs  22  and stop lugs  24  function as a stopper for preventing the inner case  2  from coming off the outer case  8 . 
     As described above, when the present embodiment of the cigarette box is opened, the inner case  2  is caused to stick out of the outer case  8  and at the same time the hinged cap  12  turns, so that the removal opening  4  of the inner case  2  becomes exposed. Conversely, by pushing the sticking-out inner case  2  back into the outer case and turning the hinged cap  12  reversely, the cigarette box is closed. Such opening and closing mode of the cigarette box is unique compared with the common hinged lid packages, and the cigarette box provides, in its open position, an appearance clearly different from such packages. For such distinctiveness, the cigarette box according to the present invention greatly increases the user&#39;s buying motivation. 
     Next, a blank set for forming the cigarette box will be described. In the explanation of the blank set,  FIGS. 1 and 2  are regarded as perspective views of the cigarette box viewed from the front. 
     The blank set comprises two blanks.  FIG. 3  shows the inner side of a blank  26  for forming the inner case  2 . 
     The blank  26  includes a plurality of panels and a plurality of flaps, where the adjacent panels, the adjacent flaps, and the adjacent panel and flap are demarcated by fold lines shown in broken lines. 
     Specifically, the blank  26  includes a rear panel  30 , a bottom panel  28  and a front panel  32  arranged in a longitudinal axis of the blank  26 . When viewed in  FIG. 3 , the bottom panel  28  is between the rear panel  30  and the front panel  32 . Inner side flaps  34  are joined to the opposite side edges of the rear panel  30 , while outer side flaps  36  are joined to the opposite side edges of the front panel  32 . 
     When viewed in  FIG. 3 , approximately U-shaped shallow notches  38  are formed at the upper edge of the rear panel  30  and the lower edge of the front panel  32 , respectively, to partly extend at the corresponding edges. The notches  38  are each disposed adjacent to the corresponding side flaps ( 34  or  36 ) which are located on the left side of the blank  26 . 
     Further, an outer top flap  40  and an inner top flap  42  are joined to the upper edge of the rear panel  30  and the lower edge of the front panel  32 , respectively, in their portions where the notches do not extend. The flaps  40 ,  42  are each located between the corresponding notch  38  and the right side flap ( 34 ,  36 ). 
     To the upper edge of the right inner side flap  34 , an intermediate top flap  44  is joined. When L denotes the length of the intermediate top flap  44  along the longitudinal axis of the blank  26  and W 1  is the width of the inner and outer flaps  40 ,  42  along the direction perpendicular to the longitudinal axis, the length L is greater than the width W 1  and equal to the distance W 2  between the right side flap  34 ,  36  and the notch  38 . 
     To the lower edges of the inner side flaps  34 , engagement flaps  46  are joined. The engagement flaps  46  are located on the opposite sides of the bottom panel  28 . 
     After glue is applied to the inner side of the blank  26  at specified locations, the blank is folded over an inner pack IP according to the process shown in  FIGS. 4 to 7  to form the above-described inner case  2 . 
     Specifically, first, as shown in  FIG. 4 , an inner pack IP is placed on the rear panel  30  so that the rear panel  30  forms the rear wall of the inner case  2 . Then, the inner side flaps  34  are folded toward the corresponding side faces of the inner pack IP to be overlaid on the corresponding side faces. At this time, the engagement flaps  46  in a pair and the intermediate top flap  44  extend parallel to the side faces of the inner pack IP, together with the corresponding inner side flaps  34 . From this state, the engagement flaps  46  are valley-folded, namely folded outwardly of the inner pack IP. 
     Then, the bottom panel  28  is folded toward the bottom of the inner pack IP to be overlaid on the bottom. The bottom panel  28  forms the bottom wall of the inner case  2 . The folding of the bottom panel  28  causes the front panel  32  with the outer side flaps  36  in a pair to stand relative to the inner pack IP. Then, the front panel  32  with the outer side flaps  36  in a pair is folded toward the front face of the inner pack IP to be overlaid on the front face of the inner pack IP as shown in  FIG. 5 . The front panel  32  forms the front wall of the inner case  2 . 
     The folding of the front panel  32  causes the outer side flaps  36  in a pair to project outward from the corresponding side faces of the inner pack IP in the same manner as the above-mentioned engagement flaps  46 , and causes the inner top flap  42  connected with the front panel  32  to face the outer top flap  44  connected with the rear panel  30  in view of the direction of the thickness of the inner pack IP. 
     Then, as shown in  FIG. 6 , the outer side flaps  36  are folded toward the corresponding side faces of the inner pack IP to be overlaid on the corresponding inner side flaps  34  already folded down, respectively. The corresponding inner and outer side flaps  34 ,  36  are glued together to form the side walls of the inner case  2 . 
     At the same time as the outer side flaps  36  are folded, the inner top flap  42 , the intermediate top flap  44  and the outer top flap  40  are folded toward the upper face of the inner pack IP in this order so that the flaps  42 ,  44 ,  40  are overlaid one on another. The flaps  42 ,  44 ,  40  are glued together to form a top wall of the inner case  2 . The top wall partly covers the top face of the inner pack IP, so that the access opening  4  with the notches  38  is formed in a place where the top wall does not cover the top face of the inner case  2 . 
     Then, as shown in  FIG. 7 , the engagement flaps  46  are folded over the corresponding side walls (outer flaps  36 ) of the inner case  2  to form the above-mentioned engagement lugs  22 . 
       FIG. 8  shows the inner side of a blank  48  for forming the outer case  8  with the hinged cap  12 . 
     Also the blank  48  includes a plurality of panels and a plurality of flaps, where the adjacent panels, the adjacent flaps, and the adjacent panel and flap are demarcated by fold lines shown in broken lines. 
     Specifically, the blank  48  has a side panel  50  in the center. The side panel  50  forms the above-mentioned first side wall  8   a  of the outer case  8 . When viewed in  FIG. 8 , a front panel  52  and a rear panel  54  are joined to the left and right side edges of the side panel  50 , respectively. The lower edges of the panels  52 ,  54  are on the same line as the lower edge of the side panel  50 . Meanwhile, the panels  52 ,  54  extend upward beyond the upper edge of the side panel  50 . Thus, the panels  52 ,  54  are greater in length (length between the lower and upper edges) than the side panel  50 . 
     An outer side flap  56  is joined to the side edge of the front panel  52 , while an inner side flap  58  is joined to the side edge of the rear panel  54 . Further, an outer bottom flap  60  and an inner bottom flap  62  are joined to the lower edges of the front panel  52  and rear panel  54 , respectively. The flaps  60 ,  62  are disposed adjacent to the side panel  50 . 
     To the lower edge of the side panel  50 , a liner flap  64  is joined. The liner flap  64  extends between the outer bottom flap  60  and the inner bottom flap  62  and extends beyond these flaps  60 ,  62 . To the lower edge of the liner flap  64 , a stop flap  66  is joined. 
     Meanwhile, the inner side flap  58  has liner flaps  68 ,  70  joined to the upper and lower edges, respectively, and to the lower edge of the liner flap  70 , a stop flap  72  is joined. The liner flap  70  is the same size as the liner flap  64 , and the stop flap  72  is the same size as the stop flap  66 . 
     To the upper edge of the side panel  50 , a cap section  74  is joined. The cap section  74  is used to form the above-described hinged cap  12 . Thus, the cap section  74  and the panel  50  are demarcated by a self hinge  14 , not by a fold line. 
     The cap section  74  includes an outer rear flap  76  adjacent to the self hinge  14 . The outer rear flap  76  is located between the front panel  52  and the rear panel  54 , and gaps are provided between the flap  76  and the respective panels  54 ,  54 . To the upper edge of the outer flap  76 , an outer lid flap  78 , an inner lid flap  80  and an inner rear flap  82  are joined in this order. The flaps  76 ,  78 ,  80 ,  82  are aligned in a longitudinal direction of the side panel  50 . 
     Outer guide flaps  84  are joined to the opposite side edges of the outer lid flap  78 , respectively, and inner guide flaps  86  are joined to the opposite side edges of the inner rear flap  82 , respectively. As clear from  FIG. 8 , each outer guide flap  84  has an approximately quadrant shape with a lower edge  84   a  extending along the upper edge of the corresponding panel  52  or  54  and an arc  84   b  connecting the end of the lower edge  84   a  and the outer top flap  78 . Meanwhile, each inner guide flap  86  has an arc  86   b  forming a side edge, where the arc  86   b  is designed to be congruous with the arc  84   b  of the guide flap  84 . 
     After glue is applied to the inner side of the blank  48  at specified locations, the blank is folded over the above-described inner case  2  according to the process shown in  FIGS. 6 to 16  to form the cigarette box shown in  FIGS. 1 and 2 , together with the inner case  2 . 
     Specifically, first, as shown in  FIG. 9 , the cap section  74  is mountain-folded along the fold line between the outer lid flap  78  and the inner lid flap  80 . This mountain folding causes the inner lid flap  80  to be overlaid on the outer lid flap  78 . The flaps  78 ,  80  are glued together to form the lid  18  of the hinged cap  12 . 
     At the same time as the inner lid flap  80  is folded, the inner rear flap  82  is valley-folded along the fold line between the inner lid flap  80  and the inner rear flap  82 . This valley folding causes the inner rear flap  82  with the inner guide flaps  86  in a pair to stand relative to the formed lid  18 , where, as clear from  FIG. 9 , the inner guide flaps  86  in a pair extend along the upper edges of the front panel  52  and the rear panel  54 . 
     In parallel with the above-described folding of the cap section  74 , the liner flap  64  is folded toward the side panel  50  so that the liner flap  64  stands relative to the side panel  50 . At the same time as the liner flap  64  is folded, the stop flap  66  is valley-folded relative to the liner flap  64 . This valley folding causes the stop flap  66  to project from the liner flap  64  to the same side as the inner and outer bottom flaps  60 ,  62 , where the stop flap  66  is located above the bottom flaps  60 ,  62 . 
     Meanwhile, the liner flap  70  and the stop flap  72  are folded in the same manner as the liner flap  64  and the stop flap  66 , and the liner flap  68  is folded toward the inner side flap  58  to be overlaid on the inner side flap  58 . 
     Next, as shown in  FIG. 10 , the liner flaps  64 ,  70  are further folded toward the side panel  50  and the inner side flap  58  to be overlaid on the side panel  50  and the inner side flap  58 , respectively. Then, the stop flaps  66 ,  72  are further valley-folded to be overlaid on the liner flaps  64 ,  70 , respectively. These stop flaps  66 ,  72  form the above-described stop lugs  24  (see  FIG. 1 ). 
     Then, the inner case  2  is caused to advance toward the side panel  50  along the direction of the arrow A in  FIG. 11 . The inner case  2  advances with its bottom taking the lead and with its first side face adjacent to the access opening  4  down. This advance of the inner case  2  folds the standing inner rear flap  82  toward the outer rear flap  76  so that the inner rear flap  82  is overlaid one the outer rear flap  76 . The flaps  82 ,  76  are glued together to form the rear wall  16  of the hinged cap  12 . 
     This folding of the inner rear flap  82  causes the left and right inner guide flaps  86  to turn toward the course of advance of the inner case  2  through 90°, so that the turned inner guide flaps  86  hold the inner case  2  between them. 
     The advance of the inner case  2  is continued until the bottom of the inner case  2  reaches the lower edge of the side panel  50 . When the advance of the inner case  2  is completed, the side wall of the inner case  2  adjacent to the access opening covers the inner rear flap  82  and the side panel  50 , entirely. Thus, the stop flap  66  forming the stop lug  24  and the liner flap  64  are held between the side panel  50  and the first side face of the inner case  2 . 
     In this state, as shown in  FIG. 11 , the stop flap  66  (stop lug  24 ) is a specified distance D apart from the engagement flap  46  (engagement lug  22 ) of the inner case  2 , the longitudinal direction of the side panel  50 . This distance D determines the amount by which the inner case  2  is allowed to stick out of the outer case  8 . 
     In the above-described advance of the inner case  2 , the engagement flap  46 , i.e., the engagement lug  22  of the inner case  2  is directed in the opposite direction to the advance of the inner case  2 , while the stop flap  66 , i.e., the stop lug  24  of the blank  48  is directed in the same direction as the advance of the inner case  2 . Thus, during the advance of the inner case  2 , the engagement lug  22  of the inner case  2  smoothly moves beyond the stop lug  24 , without engaging with the stop lug  24 , which ensures the provision of the above-mentioned distance D. 
     Next, with the left and right outer guide flaps  84 , the outer lid flap  78  and the inner lid flap  80  glued together are folded toward the top of the inner case  2  to partly cover the top of the inner case  2 , or in other word, cover the access opening  4  of the inner case  2  as shown in  FIG. 12 , thereby closing the access opening  4 . Then, the left and right outer guide flaps  84  are folded toward the inner guide flaps  86  already folded down to be overlaid on the inner guide flaps  86 , respectively. The corresponding guide flaps  84 ,  86  are glued together to form the guide walls  20  of the hinged cap  12 . It is to be noted that in the guide flaps  84 ,  86  laid one on the other, the arcs  84   b ,  86   b  are congruous with each other as shown in  FIG. 13 . 
     Next, as shown in  FIG. 14 , the front panel  52  and the rear panel  54  are folded toward the front face and the rear face of the inner case  2  to be overlaid on the front face and the rear face, respectively. The front panel  52  and the rear panel  54  form the front wall and the rear wall of the outer case  8 , where the guide walls (guide flaps  84 ,  86 ) of the hinged cap  12  are each held between the corresponding panel  52  or  54  and the inner case  2 . 
     Then, as shown in  FIG. 15 , the inner side flap  58  connected with the rear panel  54  is folded toward the other side wall of the inner case  2  remote from the removal opening to be overlaid on the other side wall. Consequently, the liner flaps  68 ,  70  connected with the inner side flap  58  and the stop flap  72  (stop lug  24 ) are held between the inner case  2  and the inner side flap  58 . Needless to say, also on the other side face of the inner case  2 , the distance D is provided between the engagement lug  22  of the inner case  2  and the stop lug  24 . 
     Then, as shown in  FIG. 16 , the inner bottom flap  62  connected with the inner side flap  58  and the outer bottom flap  60  connected with the outer bottom flap  56  are folded toward the bottom face of the inner case  2 , successively, so that the outer bottom flap is overlaid on the inner bottom flap on the bottom face. The outer and inner bottom flaps  60 ,  62  are glued together to form a bottom wall of the outer case  8  that partly covers the bottom face of the inner case  2 , thereby providing the above-mentioned push window  10 . 
     Then, the outer side flap  56  connected with the front panel  52  is folded toward the inner side flap  58  already folded down to be overlaid on the flap  58 . The flaps  56 ,  58  are glued together to form the other side wall of the outer case  8 . At this time, the cigarette box shown in  FIG. 1  is completed. 
     The present invention is not limited to the above-described embodiment of the cigarette box and blank set for it. For example, the engagement lug  22  and stop lug  24  for limiting the sticking-out of the inner case  2  can be replaced with a stopper of another form.