US3792646A - Apparatus for manufacturing a tray for packaging goods in shrinkable sheeting - Google Patents

Apparatus for manufacturing a tray for packaging goods in shrinkable sheeting Download PDF

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Publication number
US3792646A
US3792646A US00217018A US3792646DA US3792646A US 3792646 A US3792646 A US 3792646A US 00217018 A US00217018 A US 00217018A US 3792646D A US3792646D A US 3792646DA US 3792646 A US3792646 A US 3792646A
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United States
Prior art keywords
side walls
tray
short side
well
corner portions
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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US00217018A
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English (en)
Inventor
E Bauer
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Individual
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Individual
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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
    • B65D5/24—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
    • 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
    • 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
    • B65D5/2014—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 the central panel having a non rectangular shape
    • B65D5/2033—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 the central panel having a non rectangular shape polygonal having more than four sides, e.g. hexagonal, octogonal
    • 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
    • B31B50/02—Feeding or positioning sheets, blanks or webs
    • B31B50/04—Feeding sheets or blanks
    • B31B50/06—Feeding sheets or blanks from stacks
    • 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

Definitions

  • the tray consists of flexible material, preferably cardy board, and has a polygonal base, an even number of corners, and vertical side walls. Alternating side walls g 93/51 93/49 fig 17;: have outwardly directed, infoldable extension flaps.
  • Fie'ld I 30 32 The two corner portions between each side wall and 206/6 51 2, 5 the adjacent side walls are tucked in toward the side wall provided with an infoldable flap and are covered by the flap, which has a tapered end portion, which is [5 6] References Cited locked in an aperture at the edge of the bottom of the UNITED STATES PATENTS 1/1960 Pierce 93/51 R tray.
  • This invention relates to a tray which serves for packaging goods in shrinkable sheeting and consits of flexible material, preferably cardboard, and has a polygonal base, an even number of corners, vertical sidewalls, and to a process and apparatus for manufacturing the tray. Trays are made from flat cardboard blanks and have a vertical rim and serve to receive products, which are subsequently enclosed with shrunk transparent sheet ing. Industry is increasingly offering lump products for sale which have been packaged in shrinkable transparent sheeting. Such a package is inexpensive and holds the product in position and has the advantage that a potential customer can see the product.
  • the packages To ensure that the items held together by shrinkable sheeting can be stacked and transported, the packages must have a certain stability and a uniform external shape. For this reason, the products to be packaged with sheeting which is shrunk onto the products are filled into cardboard trays which have a continuous peripheral rim which contributes to the stabilization of the profile. Various forms of such cardboard trays are known.
  • Fit-over cartons which are made from prefabricated flat cardboard blanks as trays having two side walls, which have protruding lugs and are erected, whereafter the lugs are infolded and are then covered by an infoldable flap of the side wall which is disposed between the two side walls mentioned first.
  • the infoldable flap of the two-ply side wall is anchored in the bottom of the tray by locking noses, which are inserted into apertures.
  • alternating side walls have outwardly directed, inflodable extension flaps, that the two corner portions between each side wall and the adjacent side walls are tucked in toward the side wall provided with an infoldable flap and are covered by the flap, which has a tapered end portion, which is locked in an aperture at the edge of the bottom of the tray.
  • the design according to the invention results in material-saving, stable trays which have no glued joints.
  • the trays will not be destroyed even by relatively large tensile forces exerted on the side edges because the overlapping flaps hold the tucked-in comer portions reliably in position.
  • the tray has an octagonal bottom and two pairs of opposite long side walls and short side walls which connect the long side walls, the corner portions between adjacent side walls are tucked in toward the short side walls, which have extension flaps, these corner portions are covered by the extension flaps of the short side walls, and the extension flaps have tapered end portions, which are locked in apertures at the edge of the tray bottom.
  • the short side walls extend suitably at right angles to the bisector of the angle between the ad jacent side walls.
  • This tray according to the invention may be made from a flat rectangular blank, e.g., of cardboard, in that bend lines are scored into the blank to define the side walls, these bend lines extend along the lower and lateral boundary lines of the side walls and along the bisector of the angle between two side walls, and each of the flaps which cover the tucked-in corner portions are formed by punching out two pairs of right-angled triangles, each of which has one leg which forms part of the side edge of the flap and another leg which forms the top edge of the tucked-in corner portion which engages the inside of the short side wall, and each flap is separated by a scored fold line from the short side wall.
  • bend lines are scored into the blank to define the side walls, these bend lines extend along the lower and lateral boundary lines of the side walls and along the bisector of the angle between two side walls, and each of the flaps which cover the tucked-in corner portions are formed by punching out two pairs of right-angled triangles, each of which has one leg which forms part of the side edge of the flap
  • the fold lines which define the side walls are scored into the flat blank, the apertures for locking the tongues of the flaps are punched into the tray bottom so as to adjoin the fold lines, and the covering flaps are punched from the base material, whereafter the side walls of the tray are erected, the corner portions are tucked in, the flaps are bent over the tuckedin corner portions, and the tongues of the flaps are inserted into the bottom apertures.
  • the apparatus according to the invention for carrying out the process of the invention comprises a pivoted arm, which is provided with vacuum cups and serves to take flat tray blanks from a magazine, a well, which in cross-section conforms to the tray and which receives a plunger and further comprises processing stations disposed in the well one over the other, and comprising pivoted blades, which serve to tuck in the corner portions between the side walls of the trough and which are controlled by camwheels, angle members which are pivotally movable through and are controlled by camwheels and serve to infold the flaps, and means for ejecting the trays and for feeding them to the filling stations.
  • the folding stations which define the well are suitably diagonally movable for adaptation to sheets of different sizes.
  • FIG. 1 shows a tray folded to final shape
  • FIG. 2 a flat tray blank for use in the manufacture of a tray according to FIG. 1 with prescored bend lines indicated by dotted lines,
  • FIG. 3 a tray rim corner folded into final shape
  • FIG. 4 a blank comer area for forming the folded corner shown in FIG. 3.
  • FIGS. 5 to show the several steps used to fold the corners.
  • FIGS. 11 and 12 show tray rim corner areas as shown in FIG. 3, folded to final shape.
  • FIG. 13 is a diagrammatic sectional view showing a three-stage tray-erecting and -manufacturing machine
  • FIG. 14 a diagrammatic top plan view showing the machine of FIG. 13,
  • FIG. 15 a sectional view taken on line l--I of FIG. 13,
  • FIG. 16 a sectional view taken on line IIIIII in FIG.
  • FIG. 17 a sectional view taken on line IVIV in FIG. 15,
  • FIG. 18 a sectional view taken on line VV in FIG. 17, and
  • FIG. 19 a sectional view taken on line Vl-VI in FIG. 17.
  • the carboard tray shown in FIG. 1 has been folded from a flat rectangular cardboard blank 2 shown in FIG. 2 and having the length 1 and the width b.
  • the finished tray 1 comprises mutually opposite, longer side walls 18 and 19, which are connected by cornerforming short side walls 20.
  • the portions which form the side walls 18, 19, 20 are defined on the fiat cardboard blank by the bottom-defining fold lines 3, 6, 9.
  • the bend lines 7, 8, 11, 4, 5, 13 are scored into the flat cardboard blank.
  • the corner-forming short side wall 20 has an extension flap 21, which is foldable about the prescored fold line 10.
  • right-angled triangles 22 are punched out, which have one leg 15 defining a portion of the flap 2] and another leg 16 defining a portion of the tucked-in corner portion 23.
  • the blank shown in FIG. 2 is designed so that the height d of the corner-forming short side wall 20, inclusive of the extension flap 21, somewhat exceeds twice the height of the longer side walls 18, 19 so that a reliable engagement of the locking tongue 17 in the aperture 14 is ensured when the flap has been reversely bent.
  • the width 0 of the flap which has been formed by punching out the angle portions 22 is equal to the width of the corner-forming short wall 20.
  • the comer areas of the blank may be designed as shown in FIG. 4, where the comer portions are lower so that the free end portion of the reversely bent flap 21 can be reliably snapped into the aperture 14.
  • the height b of the short side walls 20 is smaller at the corner portions by the distance e than the height a, of the longer side walls. The use of this blank results in trays which have higher side walls without need for additional material for the tucked-in comer portions.
  • FIGS. 3 and 5-10 show the several steps of folding a tucked-in corner portion from a blank as shown in FIG. 4.
  • the tray When the longer side walls 18 and 19 have been erected, the tray has the form shown in FIGS. 5 and 6.
  • the corner portions 23 between the side walls have not yet been folded about their angle bisector.
  • the comer portions 23 are tucked in toward the short side walls 21) to form the corners.
  • pressure is applied along the prescored bend lines 13 until the condition shown in FIG. 7 results.
  • the flap 21 is then bent over the tucked-in comer portions 23 until the end portion 17 enters the recess 14 in the bottom of the tray.
  • FIGS. 7-10 The several steps of the manufacturing process are illustrated in FIGS. 7-10.
  • FIGS. 312 show the corner folded to final shape.
  • the folded corners can open only when the tucked-in comer portions 23 erect from their tucked-in position to their initial position.
  • the tucked-in corner portions cannot erect, however, because they are under pressure applied in the direction of the arrows shown in FIG. 11 and this pressure holds down the tucked-in corner portions.
  • FIGS. 1319 An apparatus for folding the tray according to the invention is diagrammatically shown in FIGS. 1319.
  • the flat cardboard blanks 2 are supplied through a feed chute 29 to the tray-erecting machine 30.
  • Each tray blank is lifted from the feed chute 29 by vacuum cups 33, which are carried by a lever, which is pivoted on the pivot 32, and are conveyed by a conveyor to engage the stop 34 in a position over the well 35.
  • a plunger 37 which is movable up and down is disposed over the well 35, which comprises four folding stations conforming to the bottom of the tray.
  • the side walls 18, 19 are erected in that the tray blanks are forced into the well.
  • the well 35 contains two processing stations 38 and 39, in which the corner portions 23 are tucked in and the flaps 21 are infolded.
  • the corner portions 23 are tucked in by the blades 40, which are carried by pivotal arms 42, which are loaded by springs 41.
  • the blades 40 are controlled by camwheels 413 and 44. In this operation, the blades engage the blank along the fold lines 13 and tuck in the comer portion in the direction towards the comerforming short side wall 20. As a result of this tuck-in operation, the wall 20 and the extension flap 21 of this wall are vertically erected. The tucked-in corner portions are subsequently forced against the side wall by the plunger 45.
  • FIG. 16 shows a gripper 46, which in step with the machine moves up and down along the guide rail and moves the tray from the processing station 38 to the processing station 39.
  • an angle member 48 mounted on a disc, which is rotatable through infolds the flap 21, which protrudes above the rim of the tray, until the end portion 17 snaps into the aperture 14 at the bottom of the tray.
  • the completely folded tray is subsequently moved by the gripper 46 to position 50, from which it is moved to the filling stations.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Cartons (AREA)
US00217018A 1971-01-19 1972-01-11 Apparatus for manufacturing a tray for packaging goods in shrinkable sheeting Expired - Lifetime US3792646A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2102431A DE2102431C3 (de) 1971-01-19 1971-01-19 Vorrichtung zur Herstellung von Falttabletts

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US3792646A true US3792646A (en) 1974-02-19

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US00217018A Expired - Lifetime US3792646A (en) 1971-01-19 1972-01-11 Apparatus for manufacturing a tray for packaging goods in shrinkable sheeting

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US (1) US3792646A (enExample)
DE (1) DE2102431C3 (enExample)
FR (1) FR2122436A1 (enExample)
GB (1) GB1361921A (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952634A (en) * 1974-09-09 1976-04-27 Bowater Packaging Limited Carton blank forming apparatus
US5487505A (en) * 1992-04-29 1996-01-30 Bjorkebo Gaard Ab Arrangement for a carton
EP1493674A3 (en) * 1997-02-03 2005-01-12 MeadWestvaco Packaging Systems LLC Sealable carton

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8707688U1 (de) * 1987-05-29 1987-07-16 Armin Teichmann GmbH, 8502 Zirndorf Verpackungsschachtel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887022A (en) * 1956-08-20 1959-05-19 Fibreboard Paper Products Corp Machine for setting up cartons
US2919633A (en) * 1958-05-02 1960-01-05 Baljak Corp Device for folding and locking the corners of a folding box blank
US3492923A (en) * 1966-12-27 1970-02-03 Iwema Goteborg Ab Device for making packings in the shape of trays
US3512459A (en) * 1967-07-14 1970-05-19 Frank J Difrank Container blank handling apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887022A (en) * 1956-08-20 1959-05-19 Fibreboard Paper Products Corp Machine for setting up cartons
US2919633A (en) * 1958-05-02 1960-01-05 Baljak Corp Device for folding and locking the corners of a folding box blank
US3492923A (en) * 1966-12-27 1970-02-03 Iwema Goteborg Ab Device for making packings in the shape of trays
US3512459A (en) * 1967-07-14 1970-05-19 Frank J Difrank Container blank handling apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952634A (en) * 1974-09-09 1976-04-27 Bowater Packaging Limited Carton blank forming apparatus
US5487505A (en) * 1992-04-29 1996-01-30 Bjorkebo Gaard Ab Arrangement for a carton
EP1493674A3 (en) * 1997-02-03 2005-01-12 MeadWestvaco Packaging Systems LLC Sealable carton

Also Published As

Publication number Publication date
GB1361921A (en) 1974-07-30
DE2102431C3 (de) 1975-06-26
FR2122436A1 (enExample) 1972-09-01
DE2102431B2 (de) 1974-11-14
DE2102431A1 (de) 1972-08-03

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