US3608811A - Carton blank - Google Patents
Carton blank Download PDFInfo
- Publication number
- US3608811A US3608811A US757979A US3608811DA US3608811A US 3608811 A US3608811 A US 3608811A US 757979 A US757979 A US 757979A US 3608811D A US3608811D A US 3608811DA US 3608811 A US3608811 A US 3608811A
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- US
- United States
- Prior art keywords
- panel
- corner
- wall
- blank
- locking tab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
- B65D5/30—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with tongue-and-slot or like connections between sides and extensions of other sides
- B65D5/301—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with tongue-and-slot or like connections between sides and extensions of other sides the tongue being a part of a lateral extension of a side wall
- B65D5/305—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with tongue-and-slot or like connections between sides and extensions of other sides the tongue being a part of a lateral extension of a side wall combined with a slot provided at the fold line between an adjacent side wall and a lateral extension thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/26—Folding sheets, blanks or webs
- B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
- B31B50/46—Folding sheets, blanks or webs by plungers moving through folding dies and interconnecting side walls
- B31B50/48—Folding sheets, blanks or webs by plungers moving through folding dies and interconnecting side walls by folding or tucking in locking flaps
- B31B50/50—Folding sheets, blanks or webs by plungers moving through folding dies and interconnecting side walls by folding or tucking in locking flaps by interengaging tongues and slots
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
- B65D5/24—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds
- B65D5/247—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds and being maintained in erected condition by integral mechanical locking means formed on, or coacting with, the gusset folds, e.g. locking tabs, tongue and slit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/26—Folding sheets, blanks or webs
- B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
- B31B50/46—Folding sheets, blanks or webs by plungers moving through folding dies and interconnecting side walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/60—Uniting opposed surfaces or edges; Taping
- B31B50/73—Uniting opposed surfaces or edges; Taping by mechanically interlocking integral parts, e.g. by tongues and slots
- B31B50/732—Uniting opposed surfaces or edges; Taping by mechanically interlocking integral parts, e.g. by tongues and slots by folding or tucking-in locking flaps
- B31B50/734—Uniting opposed surfaces or edges; Taping by mechanically interlocking integral parts, e.g. by tongues and slots by folding or tucking-in locking flaps interengaging tongues and slots
Definitions
- This invention relates to a blank for a carton, preferably a cardboard carton, consisting of a flexible and breakable sheet which by means of fold and/or score lines is subdivided at least into wall panels and a bottom panel, the lines extending outwardly from the bottom panel defining corner panels between the adjacent wall panels, and to an apparatus for automatically setting up and locking the blank.
- a locking tab which extends from the side edge of one of the wall panels adjacent the corners into the comer panel, said locking tab being integral with said wall panel, and at the side edge of the other wall panel adjacent the comer a locking slit is out which is adapted to receive the locking tab and extends into the wall panel and the corner panel.
- the apparatus according to the invention is essentially characterized in that there is provided adjacent at least one comer in an opening of essentially the same form and size as the bottom panel of the blank a first guide member serving to orient the blank in a position with the bottom panel substantially directly above said opening, and that there are provided adjacent each corner in said opening a second guide member which, when the blank is moved towards said opening, engages the comer panel and urges the latter towards the bottom panel, and a third guide member which, when the blank is moved towards said opening, engages the locking tab and directs it towards the locking slit.
- FIG. I is a partial projection of a blank according to a first embodiment of the invention.
- FIG. 2 is a partial projection of a blank according to a second embodiment of the invention.
- FIG. 3 is a part top plan view of an apparatus according to the invention.
- FIG. 4 is a section along line IV-IV in FIG. 3;
- FIG. 5 is a partial section similar to that of FIG. 4 and illustrates a blank according to FIG. 1 which is partly inserted in the apparatus.
- FIG. 6 is a section along line 66 in FIG. 4.
- FIG. 1 which is intended for a carton, preferably a cardboard carton, a corner of the blank.
- Fold and/or score lines 2 subdivide the blank at least into two wall panels 4 and 6 and a bottom panel 8.
- the wall panels, the comer panels and the bottom panel can thus be bounded by score or fold lines or by perforations.
- a corner panel 10 is formed at the corner between the wall panels 4 and 6 .
- the outer edges of the corner panels are slightly offset from the outer edges of the wall panels 4 and 6.
- a locking tab 12 of suitable shape extends into the corner panel 10.
- a locking slit 14 of a shape corresponding to that of the locking tab 12 is cut.
- the corner panel 110 is separated from the wall panel 6 along the side edge of the wall panel from the outer edge thereof down to the locking tab 12 and from this tab to the apex of the bottom panel 8.
- the corner panel 10 can thus be folded along the side edge of the wall panel 4 along which a score line extends, except in the portion bounded by the locking slit 14.
- the corner panel 10 is folded inwards about the side edge of the wall panel 4, the locking tab 12 and that portion of the wall panel 4 which extends into the corner panel 10 and is bounded by the locking slit 14 will remain aligned with the wall panels 6 and 4, respectively.
- the corner panel 10 there is formed for the locking tab 12 a relatively large opening which is bounded by the slit 14 and the wall panel 4.
- comer panel will be folded inwards in front of the wall panel 6, and the locking tab 112 will engage with the portion of the wall panel 41 and the corner panel 10 which lies above the locking slit M.
- the blank illustrated in FIG. 2 differs from that shown in FIG. 1 in that the corner panel is subdivided into two corner panel parts 10a and 1017 by means of a score line extending from the corner apex of the bottom panel 8 to the apex of the comer panel. Moreover, the corner panel is not separated from the wall panel 6, but the side edge of this wall panel is formed by a score line extending from the bottom panel to the locking tab 12 in alignment with the score line separating the bottom panel 8 from the wall panel 4, but is offset above the locking tab 12 by approximately 2 mm. from the wall panel 6 towards the corner panel.
- the locking tab 12 and the locking slit l will function as in the blank according to FIG.
- FIGS. 3 and 4 An embodiment of such an apparatus is illustrated schematically in FIGS. 3 and 4 and together with a partly erected blank in FIG. 5.
- the setting-up and locking apparatus has an opening of a form and size substantially corresponding to the bottom panel 8 of the blank.
- the opening lies in the lower part of a die I the top of which has outwardly inclined wall portions 3 and 5 of which the wall portions 3 are located at the short sides and the wall portions 5 are located at the long sides.
- the wall portions 3 are located at a lower level than the wall portions 5.
- a notch 7 is formed by the slightly arcuate shape of the wall portions 5 at each corner away from the wall portions 3.
- a guide member 9 is provided, preferably in the form of a shoulder. Above the guide shoulder 9 a further guide member ll projects into the die I and is located in this embodiment above the die opening.
- the apparatus may also be provided with a further guide member 13 located at one corner and outside of the die opening 1.
- a plungerlike member 15 of a form and size substantially corresponding to the bottom panel and thus to the opening previously mentioned and located at the bottom of the die 1.
- the plungerlike member 15 serves to advance a blank through the die 1.
- FIG. 5 shows a blank of the type illustrated in FIG. I which is partly inserted in the die.
- the plunger 15 is lowered by means of some suitable per se known device.
- the plunger 15 is thus lowered, the blank will be moved downwards into the die, and initially the blank assumes the shape shown in FIG. 5 in which the wall panels 4 engage the wall portions 5 and the corner panels 10 engage the guide members 111.
- the wall panels 4 will be set up before the wall panels 6, the locking tabs 12 of which engage the shoulders 9.
- the guide shoulders 9 will guide the locking tabs 12 towards the locking slits which are opened when the corner panels 10 are folded.
- the wall panels 4 will thus be set up somewhat more, before the wall panels 6, whereby the locking tabs will be moved into the openings formed at the locking slits.
- a finished cardboard box with erected wall panels locked to each other will emerge at the bottom of the die 1. While the blank is advanced-through the die 1, the notches 7 serve to offer free passage to the portions of the wall panels bounded by the locking slits 14.
- the advantages of the apparatus for the automatic settingup and locking operations are that the construction is extremely simple, and that the actual locking operation requires no movable parts such as fingers, springs or the like. In addition to the rapid and reliable setting-up and locking, the production costs of a cardboard carton made in accordance with the present invention are extremely low.
- corner panel 10 in the embodiment according to FIG. 1 need not have the illustrated form, but can be cut to expose the locking tab 12, or at least the outer or upper portion thereof. For production technical reasons it may also be advisable to make the hook-shaped recess of the locking tab 12 broader so that the widening extends into the wall panel 6.
- a blank for a carton preferably a cardboard carton, consisting of a flexible and breakable sheet which by means of fold and/r score lines is subdivided at least into wall panels and a bottom panel, the lines extending outwardly from the bottom panel defining corner panels between the adjacent wall panels, characterized in that there is at each corner a locking tab which extends from the side edge of one of the wall panels adjacent the corner into the corner panel, said locking tab being integral with said wall panel, and in that there is cut at the side edge of the other wall panel adjacent the corner a locking slit which is adapted to receive the locking tab and extending into the other wall panel and the comer panel at an angle relative to the side edge of said other wall panel.
- a blank for a carton preferably a cardboard carton, consisting of a flexible and breakable sheet which by means of fold and/0r score lines is subdivided at least into wall panels and a bottom panel, the lines extending outwardly from the bottom panel defining corner panels between the adjacent wall panels, characterized in that there is at each corner a locking tab which extends from the side edge of one of the wall panels adjacent the corner into the corner panel, said locking tab being integral with said wall panel, and in that there is cut at the side edge of the other wall panel adjacent the corner a locking slit which is adapted to receive the locking tab and extending into the wall panel and the corner score line is offset by approximately 2 mm. from the adjacent wall panel into the corner panel part.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
Abstract
The invention is for a blank for a carton. The blank has score or fold lines so that the blank may be folded into a bottom panel, wall panel and a corner panel. Then, one of the wall panels is so cut as to project into the corner panel to form a locking tab. This locking tab is integral with the adjacent wall panel. In the other wall panel, adjacent to the same corner panel, there is a locking slit which is both in the corner panel and said wall panel. Upon folding the carton blank, the locking tab slips into the locking slit so as to lock the wall panels in a substantially normal position with respect to the bottom panel to form a carton for holding objects such as bakery good, meat and the like.
Description
United States Patent 1 women Inventor Thomas Peter Frick Raa, Sweden Appl. No. 757,979 Filed Sept. 6, 1968 Patented Sept. 28, 1971 Assignee Karl Axel Arne Torbjorn Ericson Malmo, Sweden CARTON BLANK 6 Claims, 6 Drawing Figs.
[1.8. Ci 229/31 R, 229/35 Int. Cl 865d 5/24, 865d 5/26 Field oi Search 229/35, 31 R, 32; 93/51 [56] References Cited UNITED STATES PATENTS 1,736,874 11/1929 Bellin 229/35 3,161,343 12/1964 Paige 229/35 Primary ExaminerDonald F. Norton Attorney-Thomas W. Secrest ABSTRACT: The invention is for a blank for a carton. The blank has score or fold lines so that the blank may be folded into a bottom panel, wall panel and a corner panel. Then, one of the wall panels is so cut as to project into the corner panel to form a locking tab. This locking tab is integral with the adjacent wall panel. In the other wall panel, adjacent to the same corner panel, there is a locking slit which is both in the corner panel and said wall panel. Upon folding the carton blank, the locking tab slips into the locking slit so as to lock the wall panels in a substantially normal position with respect to the bottom panel to form a carton for holding objects such as bakery good, meat and the like.
' PATENTEUSEP28197| 3,808,811
INVENTOR. 30074: f r W10? PATENTEI] sEP28 ISTI $508,811
SHEET (If 4 AINVENYTOR. 770m: 6 M50? ATTO NEV CARTON BLANK This invention relates to a blank for a carton, preferably a cardboard carton, consisting of a flexible and breakable sheet which by means of fold and/or score lines is subdivided at least into wall panels and a bottom panel, the lines extending outwardly from the bottom panel defining corner panels between the adjacent wall panels, and to an apparatus for automatically setting up and locking the blank.
To this end, there is cut at each corner of the abovedescribed blank a locking tab which extends from the side edge of one of the wall panels adjacent the corners into the comer panel, said locking tab being integral with said wall panel, and at the side edge of the other wall panel adjacent the comer a locking slit is out which is adapted to receive the locking tab and extends into the wall panel and the corner panel. The apparatus according to the invention is essentially characterized in that there is provided adjacent at least one comer in an opening of essentially the same form and size as the bottom panel of the blank a first guide member serving to orient the blank in a position with the bottom panel substantially directly above said opening, and that there are provided adjacent each corner in said opening a second guide member which, when the blank is moved towards said opening, engages the comer panel and urges the latter towards the bottom panel, and a third guide member which, when the blank is moved towards said opening, engages the locking tab and directs it towards the locking slit.
Embodiments of the invention will be described more in detail in the following, reference being had to the accompanying drawings.
In the drawings:
FIG. I is a partial projection of a blank according to a first embodiment of the invention;
FIG. 2 is a partial projection of a blank according to a second embodiment of the invention;
FIG. 3 is a part top plan view of an apparatus according to the invention;
FIG. 4 is a section along line IV-IV in FIG. 3;
FIG. 5 is a partial section similar to that of FIG. 4 and illustrates a blank according to FIG. 1 which is partly inserted in the apparatus.
FIG. 6 is a section along line 66 in FIG. 4.
The blank portion shown in FIG. 1 which is intended for a carton, preferably a cardboard carton, a corner of the blank. Fold and/or score lines 2 subdivide the blank at least into two wall panels 4 and 6 and a bottom panel 8. The wall panels, the comer panels and the bottom panel can thus be bounded by score or fold lines or by perforations. At the corner between the wall panels 4 and 6 a corner panel 10 is formed. The outer edges of the corner panels are slightly offset from the outer edges of the wall panels 4 and 6. From the wall panel 6 a locking tab 12 of suitable shape extends into the corner panel 10. In the wall panel 4 and in the corner panel 10 a locking slit 14 of a shape corresponding to that of the locking tab 12 is cut. In this embodiment, the corner panel 110 is separated from the wall panel 6 along the side edge of the wall panel from the outer edge thereof down to the locking tab 12 and from this tab to the apex of the bottom panel 8.
The corner panel 10 can thus be folded along the side edge of the wall panel 4 along which a score line extends, except in the portion bounded by the locking slit 14. When the corner panel 10 is folded inwards about the side edge of the wall panel 4, the locking tab 12 and that portion of the wall panel 4 which extends into the corner panel 10 and is bounded by the locking slit 14 will remain aligned with the wall panels 6 and 4, respectively. By so folding the corner panel 10, there is formed for the locking tab 12 a relatively large opening which is bounded by the slit 14 and the wall panel 4. It will thus be very simple during the erection of the wall panels 4 and 6 towards the bottom panel 8 to introduce the locking tab 12 into the opening formed by the locking slit 14 and the folding of the corner panel 110, and the wall panels 6 and 6 will be locked in erected position by the tab l2. In this position, the
comer panel will be folded inwards in front of the wall panel 6, and the locking tab 112 will engage with the portion of the wall panel 41 and the corner panel 10 which lies above the locking slit M.
The blank illustrated in FIG. 2 differs from that shown in FIG. 1 in that the corner panel is subdivided into two corner panel parts 10a and 1017 by means of a score line extending from the corner apex of the bottom panel 8 to the apex of the comer panel. Moreover, the corner panel is not separated from the wall panel 6, but the side edge of this wall panel is formed by a score line extending from the bottom panel to the locking tab 12 in alignment with the score line separating the bottom panel 8 from the wall panel 4, but is offset above the locking tab 12 by approximately 2 mm. from the wall panel 6 towards the corner panel. When the blank is set up, the locking tab 12 and the locking slit l il will function as in the blank according to FIG. 1, whereas the wall panel is folded inwards against the bottom panel 8 about the score line subdividing the wall panel. Because the upper side edge of the wall panel 6 is offset into the wall panel part ll0b, the folded wall panel, after the blank has been set up, will be drawn against the wall panel 6 and thus engage this panel after the setting-up operation.
With the above-described embodiment of the cardboard blanks, it is possible to utilize an extremely simple apparatus for automatically setting up and locking the blanks. An embodiment of such an apparatus is illustrated schematically in FIGS. 3 and 4 and together with a partly erected blank in FIG. 5.
The setting-up and locking apparatus has an opening of a form and size substantially corresponding to the bottom panel 8 of the blank. The opening lies in the lower part of a die I the top of which has outwardly inclined wall portions 3 and 5 of which the wall portions 3 are located at the short sides and the wall portions 5 are located at the long sides. The wall portions 3 are located at a lower level than the wall portions 5. At each corner between the wall portions 3 and 5, a notch 7 is formed by the slightly arcuate shape of the wall portions 5 at each corner away from the wall portions 3. At each corner of the die 1 a guide member 9 is provided, preferably in the form of a shoulder. Above the guide shoulder 9 a further guide member ll projects into the die I and is located in this embodiment above the die opening. The apparatus may also be provided with a further guide member 13 located at one corner and outside of the die opening 1. Above the die ll, there is provided a plungerlike member 15 of a form and size substantially corresponding to the bottom panel and thus to the opening previously mentioned and located at the bottom of the die 1. The plungerlike member 15 serves to advance a blank through the die 1.
FIG. 5 shows a blank of the type illustrated in FIG. I which is partly inserted in the die. Before the blank is moved to the position shown in FIG. 5, it is guided by the member 13 to a position directly above the die 1 and directly below the plungerlike member 15. After the blank has been inserted in this manner, the plunger 15 is lowered by means of some suitable per se known device. When the plunger 15 is thus lowered, the blank will be moved downwards into the die, and initially the blank assumes the shape shown in FIG. 5 in which the wall panels 4 engage the wall portions 5 and the corner panels 10 engage the guide members 111. As the wall portions 3 are located at a lower level than the wall portions 5, the wall panels 4 will be set up before the wall panels 6, the locking tabs 12 of which engage the shoulders 9. After further lowering of the plunger 15, the guide shoulders 9 will guide the locking tabs 12 towards the locking slits which are opened when the corner panels 10 are folded. During the continued lowering of the plunger 15, the wall panels 4 will thus be set up somewhat more, before the wall panels 6, whereby the locking tabs will be moved into the openings formed at the locking slits. After the plunger 15 has been lowered completely, a finished cardboard box with erected wall panels locked to each other will emerge at the bottom of the die 1. While the blank is advanced-through the die 1, the notches 7 serve to offer free passage to the portions of the wall panels bounded by the locking slits 14.
The automatic setting-up and locking of the blank according to the embodiment illustrated in FIG. 2 takes place in essentially the same way as the above described setting-up of the blank according to FIG. 1.
ln addition to the advantage provided by the blank of this invention, which offers automatic setting-up and locking, a further and considerable advantage is obtained in that the blank can be so manufactured that no internal excess material need be removed, but only the material exceeding the configuration of the blank. In this way, it is possible to reduce not only the time required for making the blank, but also the production costs therefor since a minimum of material is required for the blank. Moreover, only one operation is necessary, viz the punching of the blank so that any gluing or other closing operations are eliminated. The walls of the finished cardboard carton are unbroken all around, in spite of the fact that the carton is locked with a tab system, the locking taking place at the corners, which offers the best possibilities of applying decorative or informative print.
The advantages of the apparatus for the automatic settingup and locking operations are that the construction is extremely simple, and that the actual locking operation requires no movable parts such as fingers, springs or the like. In addition to the rapid and reliable setting-up and locking, the production costs of a cardboard carton made in accordance with the present invention are extremely low.
Although embodiments of this invention have been described and illustrated, it will be obvious that the invention is not limited thereto, and that many modifications can be effected within the scope of the inventive idea as defined by the appended claims. For instance, the corner panel 10 in the embodiment according to FIG. 1 need not have the illustrated form, but can be cut to expose the locking tab 12, or at least the outer or upper portion thereof. For production technical reasons it may also be advisable to make the hook-shaped recess of the locking tab 12 broader so that the widening extends into the wall panel 6.
What I claim is:
l. A blank for a carton, preferably a cardboard carton, consisting of a flexible and breakable sheet which by means of fold and/r score lines is subdivided at least into wall panels and a bottom panel, the lines extending outwardly from the bottom panel defining corner panels between the adjacent wall panels, characterized in that there is at each corner a locking tab which extends from the side edge of one of the wall panels adjacent the corner into the corner panel, said locking tab being integral with said wall panel, and in that there is cut at the side edge of the other wall panel adjacent the corner a locking slit which is adapted to receive the locking tab and extending into the other wall panel and the comer panel at an angle relative to the side edge of said other wall panel.
2. A blank as claimed in claim 1, characterized in that the comer panels are subdivided into two part panels by means of a score line extending from the corner apex of the bottom panel to the apex of the comer panel.
3. A blank as claimed in claim 1, characterized in that thc comer panel is separated from the adjacent wall panel along that edge of the comer panel which faces the locking tab.
4. A blank for a carton, preferably a cardboard carton, consisting of a flexible and breakable sheet which by means of fold and/0r score lines is subdivided at least into wall panels and a bottom panel, the lines extending outwardly from the bottom panel defining corner panels between the adjacent wall panels, characterized in that there is at each corner a locking tab which extends from the side edge of one of the wall panels adjacent the corner into the corner panel, said locking tab being integral with said wall panel, and in that there is cut at the side edge of the other wall panel adjacent the corner a locking slit which is adapted to receive the locking tab and extending into the wall panel and the corner score line is offset by approximately 2 mm. from the adjacent wall panel into the corner panel part.
6. A blank as claimed in claim 4, characterized in that the locking tab extends between the offset score line and the aligned line into the corner panel part, the aligned line extending over the locking tab.
Claims (6)
1. A blank for a carton, preferably a cardboard carton, consisting of a flexible and breakable sheet which by means of fold and/or score lines is subdiVided at least into wall panels and a bottom panel, the lines extending outwardly from the bottom panel defining corner panels between the adjacent wall panels, characterized in that there is at each corner a locking tab which extends from the side edge of one of the wall panels adjacent the corner into the corner panel, said locking tab being integral with said wall panel, and in that there is cut at the side edge of the other wall panel adjacent the corner a locking slit which is adapted to receive the locking tab and extending into the other wall panel and the corner panel at an angle relative to the side edge of said other wall panel.
2. A blank as claimed in claim 1, characterized in that the corner panels are subdivided into two part panels by means of a score line extending from the corner apex of the bottom panel to the apex of the corner panel.
3. A blank as claimed in claim 1, characterized in that the corner panel is separated from the adjacent wall panel along that edge of the corner panel which faces the locking tab.
4. A blank for a carton, preferably a cardboard carton, consisting of a flexible and breakable sheet which by means of fold and/or score lines is subdivided at least into wall panels and a bottom panel, the lines extending outwardly from the bottom panel defining corner panels between the adjacent wall panels, characterized in that there is at each corner a locking tab which extends from the side edge of one of the wall panels adjacent the corner into the corner panel, said locking tab being integral with said wall panel, and in that there is cut at the side edge of the other wall panel adjacent the corner a locking slit which is adapted to receive the locking tab and extending into the wall panel and the corner panel, characterized in that one of the corner panel parts is bounded from the upper or outer part of the adjacent wall panel by means of a score line offset from the wall panel, and from the lower or inner part of the wall panel by a score line extending in alignment with the score line bounding the bottom panel.
5. A blank as claimed in claim 4, characterized in that the score line is offset by approximately 2 mm. from the adjacent wall panel into the corner panel part.
6. A blank as claimed in claim 4, characterized in that the locking tab extends between the offset score line and the aligned line into the corner panel part, the aligned line extending over the locking tab.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US75797968A | 1968-09-06 | 1968-09-06 |
Publications (1)
Publication Number | Publication Date |
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US3608811A true US3608811A (en) | 1971-09-28 |
Family
ID=25049971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US757979A Expired - Lifetime US3608811A (en) | 1968-09-06 | 1968-09-06 | Carton blank |
Country Status (1)
Country | Link |
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US (1) | US3608811A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3902653A (en) * | 1973-05-09 | 1975-09-02 | Sprinter Pack Ab | Blank for a carton box having corner locking |
US4173655A (en) * | 1978-06-08 | 1979-11-06 | International Paper Company | Poultry tray |
US5050794A (en) * | 1989-12-12 | 1991-09-24 | Rock-Tenn Company | Tamper-resistant leakproof container |
US5154309A (en) * | 1991-01-07 | 1992-10-13 | Rock-Tenn Company | Insulating blanket for shipping container having scored mineral wool |
US5201868A (en) * | 1991-01-22 | 1993-04-13 | Rock-Tenn Company | Insulated shipping container |
US5326018A (en) * | 1993-07-30 | 1994-07-05 | The Mead Corporation | Container corner structure and container blank together with a method of forming a container corner structure |
US5402932A (en) * | 1994-05-19 | 1995-04-04 | James River Paper Company, Inc. | Receptacle with corner lock |
WO1996038342A1 (en) * | 1993-12-02 | 1996-12-05 | Proto Pack Pty. Ltd. | Container with gusseted, interconnected sides and blank therefor |
US5948308A (en) * | 1997-10-22 | 1999-09-07 | Rock-Tenn Company | Food product tray with expandable side panels |
US20100006634A1 (en) * | 2008-07-08 | 2010-01-14 | Edward Vogel | Paperboard receptacle having a locking tab |
US20160167330A1 (en) * | 2014-03-04 | 2016-06-16 | Inteplast Group Corporation | Reusable box blank |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1736874A (en) * | 1927-10-25 | 1929-11-26 | Daniel J Bellin | Collapsible container |
US3161343A (en) * | 1963-02-04 | 1964-12-15 | Richard E Paige | Box or carton with locking means |
-
1968
- 1968-09-06 US US757979A patent/US3608811A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1736874A (en) * | 1927-10-25 | 1929-11-26 | Daniel J Bellin | Collapsible container |
US3161343A (en) * | 1963-02-04 | 1964-12-15 | Richard E Paige | Box or carton with locking means |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3902653A (en) * | 1973-05-09 | 1975-09-02 | Sprinter Pack Ab | Blank for a carton box having corner locking |
US4173655A (en) * | 1978-06-08 | 1979-11-06 | International Paper Company | Poultry tray |
US5050794A (en) * | 1989-12-12 | 1991-09-24 | Rock-Tenn Company | Tamper-resistant leakproof container |
US5154309A (en) * | 1991-01-07 | 1992-10-13 | Rock-Tenn Company | Insulating blanket for shipping container having scored mineral wool |
US5201868A (en) * | 1991-01-22 | 1993-04-13 | Rock-Tenn Company | Insulated shipping container |
US5326018A (en) * | 1993-07-30 | 1994-07-05 | The Mead Corporation | Container corner structure and container blank together with a method of forming a container corner structure |
WO1996038342A1 (en) * | 1993-12-02 | 1996-12-05 | Proto Pack Pty. Ltd. | Container with gusseted, interconnected sides and blank therefor |
US5402932A (en) * | 1994-05-19 | 1995-04-04 | James River Paper Company, Inc. | Receptacle with corner lock |
US5948308A (en) * | 1997-10-22 | 1999-09-07 | Rock-Tenn Company | Food product tray with expandable side panels |
US20100006634A1 (en) * | 2008-07-08 | 2010-01-14 | Edward Vogel | Paperboard receptacle having a locking tab |
US20160167330A1 (en) * | 2014-03-04 | 2016-06-16 | Inteplast Group Corporation | Reusable box blank |
US9434123B2 (en) * | 2014-03-04 | 2016-09-06 | Interplast Group Corporation | Reusable box blank |
USRE48096E1 (en) | 2014-03-04 | 2020-07-14 | Inteplast Group Corporation | Reusable box blank |
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