Tongue lid pack, blank for pack, and pack forming method

Abstract: A tongue lid pack comprises a body (2) containing a packing article (P) of filter cigarettes, and a cutting line (24) is formed on the front wall (8) of the body (2). A tongue lid (14) is hingedly connected to the opening end of the body (2), and the tongue lid (14) has a lid portion (16) for closing and opening the opening end and a tongue (18) extending from the lid portion (16) and a bent tip (21). When the tongue lid (14) is closed, the bent tip (21) of the tongue (18) is inserted through the cutting line (24) of the front wall (8). Also, a blank for the tongue lid pack and a method for folding the blank are disclosed.

Description: BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a tongue lid pack for filter cigarettes, a blank for forming the pack, and a method for forming the pack from the blank. Description of the Related Art In order to contain 20 filter cigarettes, a hinged lid pack is generally used. This pack is hard as compared with the soft pack, and can protect the filter cigarettes therein from an external force appropriately. For forming the above hinged lid pack, a main blank for a pack body having a lid and a sub-blank for an inner frame are needed. In view of an effective use of sources, the use of the hinged lid pack is not favorable. According to GB 465,828 A, a carton is provided with a hinged top or upper end to which is secured a flap, a tongue on the end of which takes into a slit in the front surface of the carton to secure the flap and top in closed position, the flap being provided on its front face with a tab to enable the tongue to be readily removed from said slit, the carton which is of rectangular form having the two sides extended above the edges of the back and front of the carton, the back having hinged along its upper edge an extension portion which extends up to the top edges of the two sides. The top or upper end of the carton is hinged to the upper edge of the extension portion, the flap being hinged to the front edge of said top; the arrangement is such that the flap, top and extension portion can be swung back about the hinge connection of the latter portion with the carton so that the upper portions of the cigarettes contained therein will be exposed above the edges of the front and back of the carton, thus enabling the cigarettes to be readily extracted. SUMMARY OF THE INVENTION The present invention provides a tongue lid pack comprising: a body for containing a packing article, said body having a front wall, an opening end, and a cutting line formed on the front wall; and a tongue lid hingedly connected to the opening end, said tongue lid including a lid portion for opening and closing the opening end, and a tongue extending from the lid portion and being insertable through the cutting line, wherein the tongue has a bent tip portion. According to the tongue lid pack, when the tongue lid is closed, the bent tip portion of the tongue is inserted to the body through the cutting line while the front wall is partially deformed. Preferably, the cutting line is curved convexedly to the opening end of the body, or a tip edge of the tongue is curved convexedly. In this case, when the tongue lid is closed, the tip edge thereof abuts the edge of the cutting line in a point contact state, so that the tip edge of the tongue is more smoothly inserted into the body. The body can further include a pair of side end flaps at an opening edges of the opening end. At the time of forming the tongue lid pack, the side end flaps are useful to position the packing article and to increase rigidity of the body. The packing article include an envelope, and a part of the envelope, which is exposed from the front wall, is separable. In this case, the cutting line is preferably positioned at a lower side than the part of the envelope. Even if the part of the envelope is separated, the tip of the tongue does not catch on the separated edge of the envelope when the tongue is inserted to the body. The blank for the tongue lid pack includes a section array. The section array has a front wall section with the cutting line, a bottom wall section, and a rear wall section which serve as a front wall of the body, a bottom wall, and a rear wall, respectively. These sections stretch in line through the folding lines. A top flap, serving as a tongue lid, is connected to an end of the rear wall section through a folding line. A pair of inner side flaps, serving as linings for side walls, is connected to both side edges of the rear wall section through folding lines. A pair of outer side flaps, serving as side walls for the body, is connected to both side edges of the front wall section through folding lines. A pair of inner bottom flaps, serving as linings for the bottom wall of the body, is arranged between the inner side flaps and the outer side flaps. These flaps are connected to the inner side flaps through folding lines. The above blank is formed to the tongue lid pack containining a packing article while the flaps and the sections are sequentially folded according to the method defined in claim 7. The tip portion of the top flap is already bent before the front wall section and the top flap are folded. Therefore, when the front wall section and the top flap are folded, the bent tip of the top flap is inserted through the cutting line of the front wall section. The inner side flaps may be folded either before or after the packing article is supplied to the rear wall section. Further scope of applicability of the present invention will become apparent from the detailed description given thereinafter. However, it should be understood that the detailed description and specific example, while indicating preferred embodiment of the invention, are given by way of illustration only, since various changes and modifications will become apparent to those skilled in the art from this detailed description. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more fully understood from the detailed description given hereinbelow and the accompany drawings which are given by way of illustration only, and thus, are not limitative of the present invention, and wherein: FIG. 1 is a perspective view of a tongue lid pack in a state in which the lid is closed; FIG. 2 shows a state in which the pack of FIG. 1 is closed; FIG. 3 is a plane view of a blank for forming the pack of FIG. 1; FIG. 4 is a perspective view of the blank of FIG. 3; FIG. 5 shows the folding of blank from the state of FIG. 4; FIG. 6 shows the folding of blank from the state of FIG. 5; FIG. 7 shows the folding of blank from the state of FIG. 6; FIG. 8 shows a state in which a packing article is provided to the blank of FIG. 7; FIG. 9 shows the folding of blank from the state of FIG. 8; FIG. 10 shows the folding of blank from the state of FIG. 9; FIGS. 11 and 12 sequentially show the process in which the blank is folded from the state of FIG. 10; FIG. 13 shows a different folding of the blank from the state of FIG. 4; FIG. 14 shows the supply of packing article to the blank in the state of FIG. 13, and the folding of the blank; FIG. 15 shows the folding of blank from the state of FIG. 14; and FIG. 16 shows the folding of blank from the state of FIG. 15. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, a tongue lid pack for filter cigarettes comprises a box-shaped body 2. The body 2 is opened at its upper end . In the body 2, a packing article P is contained. In this case, the packing article P has 20 filter cigarettes bundled by an envelope 4. A part 6 of the envelope 4 can be separated from a separating line shown by a dash-single-dot line so as to expose the filter cigarettes in the packing article P. A front wall 8 of the body 2 has a U-shaped cutout 10 at its upper edge portion, and the cutout 10 makes it easy to take out the filter cigarette from the body 2. The body 2 has a rear wall 12 and a tongue lid 14 is hingedly connected to the upper edge of rear wall 12. The tongue lid 14 has a lid portion 16, and a tongue 18 extending from the lid portion 16. A folding line 20 is formed between the lid portion 16 and the tongue 18. The shape and size of the lid portion 16 are substantially the same as those of the opening end of body 2, and the opening end can be completely covered with the lid portion 16. The tongue 18 has a root 19 and a taper tip 21. The root 19 once extends from the lid portion 16 in a state that it has the same width as the lid portion 16. Thereafter, the width of the root 19 is gradually decreased toward the tip 21. When the tongue lid 14 is closed, the root 19 can completely cover the cutout 10. A bending line 22 (FIG. 2) is formed between the root 19 and the tip 21, and the tip 21 is bent inwardly from the bending line 22. The front wall 8 further has a cutting line 24 at a lower side of the cutout 10, more specifically a lower side than the part 6 of envelope 4. The cutting line 24 extends in a width direction of the front wall 8, and is curved convexedly toward the opening end of body 2. In FIG. 2, as shown by a dash-double-dot line, the body 2 may have side end flaps 26 at upper edges of both side walls through folding lines, respectively. When these side end flaps 26 are folded toward the upper surface of packing article P, the packing article P is sandwiched between a bottom wall of the body 2 and the flaps 26. The flaps 26 are not indispensable members. As shown in FIG. 1, when the tongue lid 14 is closed, the tip 21 of tongue 18 is inserted into the body 2 through the cutting line 24 of front wall 8, and sandwiched between the front wall 8 and the packing article P. In a case where the body 2 has the flaps 26, the flaps 26 are folded before the tongue lid 14 is closed. The tip 21 of the tongue 18 is bent inwardly from the bending line 22. Due to this, when the tongue lid 14 is closed, the tip 21 presses a portion between the cutting line 24 and the cutout 10 so that the portion is dented inwardly. Therefore, the edge of curved cutting line 24 is exposed, and the tip 21 abuts the edge in a point contact state. This abutment bends the tip 21 more inwardly, and opens the cutting line 24, thereby the tip 21 is slightly inserted into the body 2 through the cutting line 24. If the tip 21 is slightly inserted in this way, the tip 21 can be more deeply and smoothly inserted into the body 2. The cutting line 24 is positioned at the lower side than the part 6 of envelope 4. For this reason, even if the part 6 is cut from the envelope 4, the tip 21 of tongue 18 does not catch on the edge of envelope 4, and the envelope does not inhibit the insertion of tip 21. When the tongue 18'of tongue lid 14 is pushed up from the state of FIG. 1, the tongue 18 can be easily pulled out from the cutting line 24 and the tongue 14 is opened as shown in FIG. 2. As shown by the dash-double-dot line of FIG. 2, an insertion edge of the tip 21 may be curved convexedly. In this case, the insertion of tip 21 can be more easily performed. The tongue lid pack is formed from one blank shown in FIG. 3. The blank has sections 28, 30, and 32 which serve as the front wall 8, the bottom wall, and the rear wall 12, respectively. These sections stretch in line through folding lines shown by broken lines, thereby forming a section array. A top flap 34, serving as the tongue lid 14, extends from the section 32 through a folding line. Inner side flaps 36, serving as linings for the side walls of body 2, are continuous with both side edges of the section 32 through the folding lines, respectively. An inner bottom flap 38 is continuous with an edge of each flap 36 through a folding line. These inner bottom flaps 38 are adjacent to both sides of the section 30, and used as linings for the bottom wall of the body 2. The side end flap 26 is connected to the other end edge of each flap 36 through a folding line as required. Outer side flaps 40, serving as the side walls of body 2, are continuous with both side edges of section 28 through folding lines. The section 28 has the cutting line 24, and the flap 34 has the folding line 20 and the bending line 22. A method for forming the tongue lid pack from the blank of FIG. 3 will be explained. The known packing machine can be used to form the tongue lid pack. FIG. 4 shows the blank, which has just been supplied to the packing machine, and paste is applied onto the sections 28, 32, and 40. As shown in FIG. 5, both flaps 36 are folded with the flaps 38 (and flaps 26) along the folding lines between the flaps 36 and the section 32 so as be opposite to each other. At the same time with the folding of flaps 36, the tip portion of flap 34 is bent from the bending line 22. Thereafter, both flaps 38 are folded, and then the section 30 is folded to the flaps 38 together with the section 28 and both flaps 40. As a result, as shown in FIG. 6, the section 30 is superimposed on the flaps 38, and the section 28 and the flaps 40 rise perpendicularly with respect to the section 32. In a case where the flaps 36 have flaps 26, both flaps 26 are bent outwardly (FIG. 7). Thereafter, as shown in FIG. 8, the packing article P is supplied on the section 32, and sandwiched between the flaps 36. The packing article P can be inserted along the flaps 36 until the article P gets over the bent tip portion of flap 34 and come in contact with the flaps 38 from the opening defined between the flaps 36. In a case where the flaps 36 has the flaps 26, these flaps 26 are folded inwardly, and the packing article P is sandwiched between the flaps 26 and the flaps 38 (FIG. 9). The packing article P is adhered to the section 32 with paste. However, since paste on the section 32 is not fully dried at this time, adhesive strength of the packing article P is poor. For this reason, when the packing article P is sandwiched between the flaps 26 and the flaps 38, unnecessary movement of the packing article P on the section 32 can be prevented, and the correct positioning of packing article P can be achieved. As shown in FIG. 10, the flap 34 is folded by a predetermined angle from the folding line (that is, self-hinge for the tongue lid 14) between the flap 34 and the section 32. Thereafter, the section 28 is folded toward the upper surface of packing article P together with the flaps 40, and the flap 34 is further folded at the same time. As a result, the portion of the flap 34, which corresponds to the lid portion 16, is pressed to the end surface of packing article P, and folded to the upper surface of packing article P from the folding line 20. The tip portion of the flap 34 is already bent from the bending line 22, and the cutting line 24 of the section 28 is curved convexedly with respect to the tip edge of flap 34. As shown in FIG. 11, the tip edge of flap 34 abuts the edge of cutting line 24 so as to open the cutting line 24. As a result, the tip of flap 34 is inserted through the cutting line 24, and the section 28 and the flap 34 are overlapped with each other on the packing article P. Since paste is applied onto the section 28, the section 28 is adhered to the packing article P. Thereafter, both flaps 40 are folded and superimposed on the corresponding flaps 36 outwardly. Since paste is also applied onto the flaps 40, the flaps 40 and 36 are adhered to each other. At this time, the forming of tongue lid pack containing the packing article P is completed. The completed tongue lid pack is supplied to a film packing machine, and packed with a film in the film packing machine. FIGS. 13 to 16 show processes in which the tongue lid pack is formed from the blank of FIG. 3 using a different known packing machine. First, as shown in FIG. 13, the tip portion of flap 34 is bent from the bending line 22. Thereafter, the packing article P is supplied on the section 32, and both flaps 36 are folded toward both side faces of packing article P. Therefore, as shown in FIG. 14, the packing article P is sandwiched between the flaps 36. Thereafter, as shown in FIG. 15, one flap 38 (and one flap 26) is folded toward the end face of packing article P. Similarly, the other flap 38 (and the other flap 26) is folded (FIG. 16). After this, the section 30 is folded with the section 28 and the flaps 40, and the flap 34 is folded at the same time. Then, the folding is sequentially carried out in the same manner as shown in FIGS. 10, 11, and 12, and the forming of tongue lid pack is completed.

Claims: A tongue lid pack comprising: a body (2) for containing a packing article (P), said body (2) having a front wall (8), an opening end, and a cutting line (24) formed on the front wall (8); and a tongue lid (14) hingedly connected to the opening end, said tongue lid (14) including a lid portion (16) for opening and closing the opening end, and a tongue (18) extending from the lid portion (16) and being insertable through the cutting line (24), characterised in that the tongue (18) has a bent tip portion (21). The pack according to claim 1, characterized in that the cutting line (24) is curved convexedly to the opening end. The pack according to claim 1 or 2, characterized in that the tongue (18) has a tip edge curved convexedly. The pack according to claim 1, characterized in that said body (2) further includes a pair of side end flaps (26) at the opening end. The pack according to claim 1, characterized in that the packing article (P) include an envelope (4) of which a part (6) is separably exposed to the opening end, and said cutting line (24) is positioned at a lower side than the part (6) of the envelope (4). A blank for forming the tongue lid pack of claim 1 comprising: a section array including a front wall section (28) with the cutting line (24), a bottom wall section (30), and a rear wall section (32), said sections serving as the front wall (8), a bottom wall, and a rear wall of said body (2), respectively, and stretching in line through folding lines; a top flap (34) connected to an end of said rear wall section (32) through a folding line, said top flap (34) serving as said tongue lid (14) and having a folding line (20) for dividing the lid portion (16) and the tongue (18); a pair of inner side flaps (36) connected to both side edges of the rear wall section (32) through folding lines, said inner side flaps (36) serving as linings for side walls of said body (2); a pair of outer side flaps (40) connected to both side edges of the front wall section (28) through folding lines, said outer side flaps (40) serving as the side walls; and a pair of inner bottom flaps (38) arranged between said inner side flaps (36) and said outer side flaps (40), and connected to said inner side flaps (36) through folding lines, said inner bottom flaps (38) serving as linings for the bottom wall; characterised in that the top flap (34) has a bending line (22) for bending the top portion (21) of the tongue (18). A method for forming a tongue lid pack containing a packing article (P) from said blank of claim 6, comprising the steps of: folding said inner side flaps (36) and said top flap (43) from the folding lines and the bending line thereof, respectively; folding said bottom inner flaps (38) from the folding lines thereof toward a packing article on said rear wall section (32); folding said bottom wall section (30) from the folding line thereof toward the packing article (P), together with said front wall section (28) and said outer side flaps (40); folding said top flap (34) from the folding lines thereof to said front wall section (28) while folding said front wall section (28) from the folding line thereof toward the packing article (P), together with said outer side flaps (40), thereby inserting the top portion (21) of said top flap (34) through the cutting line (24) of said front wall section (28), and superimposing said top flap (34) and said front wall section (28) on the packing article (P); and folding said outer side flaps (40) from the folding lines thereof to be superimposed on said inner flaps (36). The method according to claim 7, characterized in that the packing article (P) is supplied onto said rear wall section (32) after said inner side flaps (36) are folded. The method according to claim 7, characterized in that said inner side flaps (36) are folded after the packing article (P) is supplied onto said rear wall section (32).

Inventors: SENDOH MAKOTO, TAMBO HITOSHI, YAMASHITA KENICHI, SENDOH, MAKOTO, TAMBO, HITOSHI, YAMASHITA, KENICHI
Applicants: JAPAN TOBACCO INC, JAPAN TOBACCO INC.
Application year: 1998
Main classification: B65D5
IPC codes: B65D5, A24F15, B65D85