EP0231638A2 - Boîte pliante à verrouillage par pénétration et poinçonnage - Google Patents

Boîte pliante à verrouillage par pénétration et poinçonnage Download PDF

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Publication number
EP0231638A2
EP0231638A2 EP86309962A EP86309962A EP0231638A2 EP 0231638 A2 EP0231638 A2 EP 0231638A2 EP 86309962 A EP86309962 A EP 86309962A EP 86309962 A EP86309962 A EP 86309962A EP 0231638 A2 EP0231638 A2 EP 0231638A2
Authority
EP
European Patent Office
Prior art keywords
locking
panel
end panel
panels
interior
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.)
Granted
Application number
EP86309962A
Other languages
German (de)
English (en)
Other versions
EP0231638A3 (en
EP0231638B1 (fr
Inventor
John William Cargile
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kliklok LLC
Original Assignee
Kliklok LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kliklok LLC filed Critical Kliklok LLC
Publication of EP0231638A2 publication Critical patent/EP0231638A2/fr
Publication of EP0231638A3 publication Critical patent/EP0231638A3/en
Application granted granted Critical
Publication of EP0231638B1 publication Critical patent/EP0231638B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B65D5/26—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 extensions of opposite sides mutually interlocking to lie against other sides

Definitions

  • the present invention relates generally to the packaging field and, more particularly, to a folding container, tray or carton having a thread and punch lock on an end panel locking structure that insures full and reliable locking engagement during each carton erecting cycle.
  • Cartons, trays and other folding containers having end panel locking structures are known in the art.
  • the end walls of the carton are formed in overlapping end wall panels articulated to the side and bottom walls of the carton body and locked together with tongues, tabs and slits or the like. Boxes and cartons of this type are used to package a wide range of goods from, for example, cookies to automobile parts.
  • U.S. patent 1,425,256 to Hickman et al discloses a berry container having an end panel locking structure. Overlapping end panels articulated to the carton sidewalls include a cooperating tab and slit structure providing locking action. A third, solid interior end panel articulated to the bottom wall provides increased strength to the carton.
  • the Hickman concept provides a strong and secure carton, it is not without its disadvantages.
  • the Hickman carton is not designed for erection on the high speed carton forming and erecting machinery required to be economically competitive in the marketplace of today.
  • the solid interior end panel can sometimes provide a hinderance to secure engagement of the end lock. It has been found that the solid interior end panel resists proper overtravel of the locking tab as it is punched into position by the punch-in finger of the erecting machinery. Without complete engagement of the locking tab in the cooperating slit being assured, consistent carton erection cannot be obtained.
  • U.S. patent 3,206,098 to Stenger et al provides a portion of the locking structure of the overlapping end panels extending above the upper limit of the solid interior end panel. This structure allows some relief and flexibility to aid in lock engagement.
  • the Stenger carton suffers from several disadvantages.
  • the lock structure is complicated and often interferes with product loading and/or smooth operation of the hinged carton top.
  • the upper edge portion of the lock presents a jagged edge that can hang on the product as it is being inserted, or catch the lower edge of the charlotte flaps on the top as the carton is being closed.
  • the interior end panel does not extend along the entire depth, it does not provide the desired degree of isolation of the carton contents from outside elements as, for example, when packaging semi-exposed food products, such as butter patties.
  • a need is, therefore, identified for a carton with an improved thread and punch lock on the overlapping end panels.
  • Another object of the present invention is to provide a carton with a locking structure of added strength and reliability that also assures isolation of the carton contents from outside elements.
  • Still another object of the present invention is to provide a carton with a locking structure that substantially eliminates interference with product loading and top closure.
  • a further object of the present invention is to provide a carton with an end panel locking structure that is easier to erect and that ensures full engagement of the lock during each carton erecting cycle.
  • an improved container, tray or carton formed from a single sheet of foldable material is provided.
  • the carton includes a bottom wall panel and a pair of oppositely disposed sidewall panels articulated to the bottom wall panel.
  • First and second locking end panels articulated to the sidewall panels are adapted to overlap each other and overlie an interior end panel when locked.
  • the interior end panel articulated to the bottom wall panel provides additional strength to the container.
  • the interior end panel further isolates the container interior and contents from outside elements all along the lock.
  • relief means in the form of a slit in the interior end panel allows full engagement of the locking means of the first and second locking end panels during carton erection, as will be more fully explained below.
  • the first locking end panel includes a locking assembly.
  • the locking assembly includes a tongue and cooperating locking tab longi­tudinally aligned along the end panel.
  • the second locking end panel includes a lock assembly receipt aperture. When the tongue and tab are inserted and punched into the receipt aperture of the second locking end panel, secure locking action is provided through desirable four-point engagement.
  • the relief slit along the interior end panel is substantially U-shaped and in alignment with the locking tab.
  • the open end of the U is directed toward the lock assembly receipt aperture when the end panels are in overlapping or erected position. In this position, the slit extends along the interior end panel adjacent the edge of the receipt aperture.
  • the interior end panel provides the desired relief as the mechanical punch-in finger secures the lock structure, and at the same time provides the desired protection of the carton contents from outside elements along the entire lock.
  • FIG. 1 showing a tray blank 10 including the end panel thread and punch lock constructed in accordance with the principles of the present invention.
  • the blank 10 is preferably formed from a single sheet of coated paperboard.
  • the blank 10 has a generally elongated, rectangular shape and is formed having a bottom panel 12, a pair of side panels 14, 16 articulated to opposite sides of the bottom panel 12 at side panel fold lines 18, 20 respectively.
  • An interior end panel 22 is articulated to each end of the bottom wall panel 12 along an end panel fold line 24.
  • a first locking end panel 26 is articulated to each end of the side panel 14 along fold line 28 while a second locking end panel 30 is articulated to each end of the sidewall panel 16 along the fold line 32.
  • the blank 10 is erected into a tray by folding the side panels 14, 16 and end panels 22, 26 and 30 in overlapping relation as shown in the drawing figures and described in detail below.
  • the first locking end panels 26 each include a lock assembly comprising a tongue 34 along the outer edge 36 and a cooperating locking tab 38 longi­tudinally spaced from the tongue along a mid-portion of the panel.
  • the tongue 34 and cooperating locking tab 38 of the first locking end panel 36 are received in an aperture 40 in the second locking end panel 30 to securely lock the end panels of the tray or carton in the erected position. With both the tongue 34 and cooperating locking tab 38 received in the aperture 40, secure engagement is provided at at least four points 42 (note Figure 5).
  • the interior end panels 22 each include a relief slit 44 of substantially U-shape and subs­tantially in alignment with the locking tab 38.
  • the open end of the substantially U-shaped relief slit 44 is also directed toward and substantially surrounds one side of the receipt aperture 40 in the second locking end panel 30 (note Figure 3).
  • the relief slit 44 is spaced from, but adjacent one edge 46 of the receipt aperture 40.
  • the interior end panel 22 with relief slit 44 provides firm backup to the edge 46 of the lock assembly receipt aperture 40, but at the same time allows inward travel of a punch-in finger (see Figure 5A). This action allows reliable, full engagement of the locking tab 38 with the aperture edge 46.
  • the interior panel 22 provides additional strength to the carton and support to the locking panels 26, 30. Since there is no opening in the panel 22 but only a slit 44, the desirable isolation of the interior of the erected tray or carton is obtained.
  • the initial erecting and thread and punch lock engaging step comprises the upward folding (note action arrow A) of the interior end panel 22 along the fold line 24.
  • the sidewall panel 16 is upwardly folded about the fold line 20 and the second locking end panel 30 is folded inwardly, as shown in Figures 3, 3A and 3B (see action arrow B).
  • the opposite sidewall panel 14 is now folded upwardly along the fold line 18 to a position parallel to the now folded sidewall panel 16.
  • the first locking end panel 26 is then folded inwardly (note action arrow C and Figures 4, 4A and 4B) to overlie the second locking end panel 30.
  • the tongue 34 is inserted or threaded through the lock receipt aperture 40 (note Fig. 4B).
  • the final lock securing step is shown in Figures 5, 5A and 6.
  • the backup piece P of the automated high speed erecting machinery is inserted into the carton to engage one side of the interior end panel 22.
  • the tab punch-in finger F is then moved in the direction of action arrow D to engage the locking tab 38 and snap the tab 38 past the edge 46 of the aperture 40.
  • This locking action fully and completely provides the overlapping end panels 26, 30 with secure engagement at the four points 42 (see Fig. 6).
  • the relief slit 44 in the interior end panel 22 allows the proper inward movement to the paperboard to assure full engagement of the locking tab 38.
  • the full depth interior end panel 22 provides added strength to the carton and assures isolation of the carton contents from outside elements all along the lock. Additionally, the relief slit 44 in the end panel 22 simplifies the carton or tray erection process, and assures full and reliable engagement of the thread and punch lock during each carton erecting cycle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
EP19860309962 1986-01-30 1986-12-19 Boîte pliante à verrouillage par pénétration et poinçonnage Expired EP0231638B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US82406486A 1986-01-30 1986-01-30
US824064 1997-03-24

Publications (3)

Publication Number Publication Date
EP0231638A2 true EP0231638A2 (fr) 1987-08-12
EP0231638A3 EP0231638A3 (en) 1988-06-08
EP0231638B1 EP0231638B1 (fr) 1991-04-24

Family

ID=25240509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860309962 Expired EP0231638B1 (fr) 1986-01-30 1986-12-19 Boîte pliante à verrouillage par pénétration et poinçonnage

Country Status (3)

Country Link
EP (1) EP0231638B1 (fr)
CA (1) CA1273325A (fr)
DE (1) DE3678940D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012102432A1 (de) 2011-03-22 2012-09-27 Rima Wolf Verbesserte Verpackung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2303796A (en) * 1939-08-08 1942-12-01 Ind Patents Corp Carton
GB552710A (en) * 1941-09-15 1943-04-21 Wm Finlay & Sons Ltd Improvements in or relating to folding boxes
US3206098A (en) * 1964-05-26 1965-09-14 Bradford Speed Packaging And D End wall construction of folding boxes
US3261535A (en) * 1965-02-08 1966-07-19 John L Krause Combined greeting card and greeting card holder
US3380645A (en) * 1967-05-05 1968-04-30 Certipak Corp Glueless interlocks for folding box panels
US3955748A (en) * 1975-03-21 1976-05-11 The Mead Corporation Panel interlocking means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2303796A (en) * 1939-08-08 1942-12-01 Ind Patents Corp Carton
GB552710A (en) * 1941-09-15 1943-04-21 Wm Finlay & Sons Ltd Improvements in or relating to folding boxes
US3206098A (en) * 1964-05-26 1965-09-14 Bradford Speed Packaging And D End wall construction of folding boxes
US3261535A (en) * 1965-02-08 1966-07-19 John L Krause Combined greeting card and greeting card holder
US3380645A (en) * 1967-05-05 1968-04-30 Certipak Corp Glueless interlocks for folding box panels
US3955748A (en) * 1975-03-21 1976-05-11 The Mead Corporation Panel interlocking means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012102432A1 (de) 2011-03-22 2012-09-27 Rima Wolf Verbesserte Verpackung
DE102012102432B4 (de) * 2011-03-22 2013-08-08 Rima Wolf Verbesserte Verpackung

Also Published As

Publication number Publication date
EP0231638A3 (en) 1988-06-08
DE3678940D1 (de) 1991-05-29
EP0231638B1 (fr) 1991-04-24
CA1273325A (fr) 1990-08-28

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