EP0711237B1 - Gerät zum öffnen von kartons - Google Patents

Gerät zum öffnen von kartons Download PDF

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Publication number
EP0711237B1
EP0711237B1 EP94921725A EP94921725A EP0711237B1 EP 0711237 B1 EP0711237 B1 EP 0711237B1 EP 94921725 A EP94921725 A EP 94921725A EP 94921725 A EP94921725 A EP 94921725A EP 0711237 B1 EP0711237 B1 EP 0711237B1
Authority
EP
European Patent Office
Prior art keywords
severing
ridge
carton
plane
along
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
Application number
EP94921725A
Other languages
English (en)
French (fr)
Other versions
EP0711237A1 (de
Inventor
William George Edward Daysh
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.)
Individual
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Individual
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Publication date
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Publication of EP0711237A1 publication Critical patent/EP0711237A1/de
Application granted granted Critical
Publication of EP0711237B1 publication Critical patent/EP0711237B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B69/00—Unpacking of articles or materials, not otherwise provided for
    • B65B69/0033—Unpacking of articles or materials, not otherwise provided for by cutting
    • 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
    • B65D5/02—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 or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06—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 or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B65D5/061—Rectangular containers having a body with gusset-flaps folded inwardly beneath the closure flaps
    • B65D5/062—Rectangular containers having a body with gusset-flaps folded inwardly beneath the closure flaps with supplemental means facilitating the opening, e.g. tear lines, tear tabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B7/00—Hand- or power-operated devices for opening closed containers
    • B67B7/30—Hand-operated cutting devices

Definitions

  • the present invention relates to a device for opening waxed paper or plastics or metal foil coated paperboard cartons and the like containing liquid, semi-liquids or powders that may be poured of the kind having a winged sealed ridge closure.
  • the invention provides a hand-held or wall-mounted means for enabling the seal closures of milk cartons and the like to be severed so that the carton may be readily opened and re-closed but not resealed as required.
  • the type of paper carton used particularly for domestic milk supply is well known.
  • the form of carton is marketed under the Registered Trade Marks ELOPAK, or TETRAPAK.
  • Such cartons are sealed by inclining the upper portions of the side walls inward with two opposite faces folded together to form so called wings and heat treating or otherwise sealing the mating internal extremities of the inclined portions to form a ridge.
  • This ridge may be folded flat on the upper face of the carton or it may be left in an upstanding attitude so that the upper face of the carton appears gabled.
  • the flat top types of cartons generally have tongues at each end of the folded ridge which are detachabley secured to the side walls of the carton to keep the ridge in a flat folded position for transportation and sales display.
  • Printed on such cartons are opening instructions sometimes with illustrations.
  • the guide means is a bifurcated tongue which projects from the underside of the device in substantially parallel disposition to said first plane.
  • the severing means may include a first cutter for severing along said first plane and a second cutter for severing said sealed closure along a second plane meeting the first plane substantially in the middle of the length of the sealed closure and at an angle of between 45° and 150°.
  • the severing means comprises a thin cutting blade or blades.
  • the severing means may be a shearing means, guillotine means or snipping means.
  • the device includes a second guide means for bearing on the sealed closure remote from and substantially parallel to the first guide means.
  • the present invention recognises that the suggested method of opening cartons would be satisfactory if the force required to release the carton closure by applying a force to the wings could be significantly reduced.
  • the present invention facilitates the opening of cartons simply and cleanly. It severs and removes a segment of the closure ridge of the carton so that the wings are no longer secured together and are free to be opened in accordance with the general instructions.
  • Figures 1 to 7 illustrate the upper portion of a milk carton while having a body formed by a substantially square base, four side walls and a sealed folded flat top.
  • Opposite side walls 2 are folded inward to permit the opposite side walls 3 to be inclined together to meet a ridge 4 which is folded flat and held in place by tongues 5 which are secured to the side walls 2.
  • the shorter walls 2 are folded inward although in the embodiment shown, the carton is of substantially square-cross section.
  • the inclined portions 6 and 7 at the side walls 3 may be longer than the width of side walls 2 so that the top of the carton forms a gabled top.
  • the top of the carton 1 is then in an open position as shown in Figures 5 and 6 illustrating the form of pouring lips 17 formed by the opened wings 12 and 13.
  • the carton may be re-closed but not resealed by pushing the pouring tip in the direction of the ridge.
  • the lines 10 and 11 along which the ridge 4 is severed or folded is shown in Figures 1 to 6 as orthogonal.
  • the angle between the lines 10 and 11 is not critical and may be varied by increasing the angle by an additional angle 18.
  • the angle of the lines 10 and 11 may lie between 45° and 150° although it is preferably limited to 60° so that the remaining part of the ridge 4 does not interfere with the opening of the wings 12 and 13.
  • the angle 19 between the lines 10 and 11 can assist the re-closing of the carton by holding the wings 12 and 13 in a closed position.
  • Figures 8 and 9 show a form of cutter blade 20 comprising a section 21 for severing along the line 10 which is substantially parallel to the ridge 4, a section 22 for severing across the height of the ridge 4 along the line 11 which is orthogonal to the line 10, a section 23 which bears on the edge of the ridge to act as a guide to limit the length of the severed portion of the ridge 4 and a back plate 24 having a post 25 which is used to correctly locate and help to secure the cutter blade in a carton opening device.
  • the cutting angle along the line 10 is shown by the angle 26 and the cutting angle along the line 11 is shown on Figure 8 by the angle 27. These angles are set to assist the cutting action and to reduce the force required to sever the portion 9 of the carton.
  • Figure 9 shows an alternative form of cutter blade in which the integers which perform the same function as those described with reference to Figure 8 are given the same reference numerals. It will be seen at the angles 26 and 27 in Figure 8 are reversed in the alternative form of blade. This reversal of the angles helps to maintain the ridge within the carton opening device whilst the severing is effected.
  • FIGS 10 and 11 show a hand-held device basically comprising handles 28 and 29 joined by a link arm 30 which acts against a spring 31 to close jaws 32 and 33 which pivot about a post 34.
  • the jaw 32 has an arcuate blade cutting edge 35 which co-operates with a corresponding edge 36 on the jaw 33.
  • the edges 35 and 36 determine the lateral line of sever of the carton along the line 10 shown on Figure 10.
  • the maximum length of cut 37 as shown on Figure 10 is determined by the length of the cutting edge 35, however, this is set by the positioning of a guide 38 which fits below the wings of the carton.
  • the vertical line of sever of the carton along the line 11 shown on Figure 10 is determined by the edges 40 and 41.
  • the maximum length of the cut 39 is determined by the length of upstanding edges 40 and 41 on jaws 32 and 33 respectively.
  • the preferred depth of the cut 39 may be set as described later with reference to Figure 12.
  • the severing blade or blades may be replaced by a cut and pinch jaw assembly.
  • the severing action provided by such a device is suited to a static surface-mounted or wall-mounted device.
  • the depth of severing must extend from the top edge of the ridge 4 to the root of the ridge so as to remove the sealed closed portion of the ridge. This depth may be controlled by a stop 50 which rests on the top edge of the ridge 4 as shown in Figure 12.
  • the positioning of the carton opening device is assisted by the tongue guide 38, which holds the severing blade parallel to the ridge so that the carton is severed below the level at which the carton ridge is sealed.
  • Figure 13 shows a further form of device for severing a portion of the ridge of a carton.
  • the device includes a retractable guide 73 pivoted about a pin 74 so that a leg 75 of the guide fits under the wings of the carton and is retracted to a clamp and guillotine assembly 76 in position after it has been located on the top of the ridge 4. This ensures that the lateral line 10 is accurately aligned to sever the carton along the ridge line of the carton.
  • the device has a handle 77 which is moved against the return action of a spring not shown to cause the cutter blade 64 located on post 78 on handle 77 to co-operate with a fixed cutter guillotine blade to sever the ridge 4.
  • the ridge 4 is positioned by a spring steel pressure plate 79 mounted on a back plate 80 and the guide 73.
  • the guide 73 has a keeper pin 81 which is depressed by the initial movement of the handle 77 causing the contact of a chamfered ramp 82 on the handle.
  • the guide 73 is sprung to return to the open position.
  • the pressure plate 79 bears against a post 78 on the cutter blade 64 to maintain contact pressure on the cutting edge.
  • the severing of the ridge of the carton may be effected by shearing members, snipping members, guillotine members or cutting members.
  • the device may be hand-held or mounted on a fixed surface such as a wall or work surface.
  • FIG. 14 to 18 A simple form of device is shown in Figures 14 to 18.
  • a first form of device illustrated in Figures 14 to 16 does not belong to the invention.
  • the severing is achieved by a fine cutting wheel 83 mounted at a foot of a side limb 84 of a U-shaped channel 85.
  • a cross guide 86 is secured between side limb 87 and the side limb 84.
  • An end stop 88 terminates a channel 85.
  • a tongue guide is missing.
  • the channel 85 is pushed along the ridge of a carton.
  • the guide 86 holds the ridge against the wheel 83 which severs the ridge along the line 10 (shown in Figure 2).
  • the length of cut performed by the wheel 83 is limited to the line 11 (shown in Figure 2) by the end of the carton ridge bearing against the end stop 88.
  • the device is then withdrawn from the carton and the severed portion of the ridge folded back to free the wings for opening in a normal way.
  • a work surface or wall-mounted rotary device includes a first severing blade 91 for effecting the cut along the line 10 (shown in Figure 2), the second severing blade 92 for effecting the cut along the line 11 (shown in Figure 2).
  • the severing blades 91 and 92 are mounted in a housing 93 having a tongue 94 to locate under the gabled ridge and to limit the length of ridge that is severed. It will be appreciated that as the cartons are substantially square the wings project halfway into the ridge from both sides. Therefore the limitation for severing is substantially halfway along the ridge.
  • the blades are rotated within the housing 93 by a wheel 95 or an electric motor.
  • the device is mounted on a wall or supported on a work surface by brackets 96.
  • Figures 21 to 24 show a preferred embodiment of the invention.
  • the carton opening device shown in its component parts in Figures 21 to 24 includes means for lifting the ridge of flat top cartons, a shrouded blade for safety, hinge means for providing a mechanical advantage to assist the severing action and cleaning ports to prevent a build-up of waste material within the shrouded cavity of the device.
  • the device is suitable for opening gabled cartons and brick type cartons such as those marketed as "COMBIBLOC".
  • the device is formed as a two part plastics moulding with a thin surgical steel blade secured in an operating handle.
  • Figure 21 shows an operating handle 97 with a recessed area 98 to receive the thin severing blade (not shown).
  • the end of the handle 97 is provided with a slot for lifting the ridge of flat top cartons.
  • Four pivot pins 99 are moulded into an annular hinge 100 at the boss end of the handle 97.
  • Figures 22 and 23 show the two parts 101 and 102 of the housing which are secured together about the handle 97.
  • Figure 22 shows the upper part 101 of the housing.
  • the part 101 consists of a handle portion 103 and a head portion 104.
  • the head portion 104 is recessed to permit unrestricted passage of the blade across a slot 105.
  • the outer walls of the head portion 104 have ports 106 and 107 to permit the removal of waste material which may become lodged within the recessed portion 104 of the device.
  • Figure 23 shows the co-operating part of the two part housing.
  • the outline shape is substantially identical with the part shown in Figure 22, so that locating pegs on one part co-operate with corresponding blind holes in the other part to accurately position the two parts of the housing about the annular hinge 100.
  • a bifurcated tongue 108 projects from the underside of the part of the housing shown in Figure 23.
  • the slot 105 is aligned with the slot in the tongue so that the carton ridge may be inserted into the slot 105 with the tongue 108 located below the ridge and between the wings of the carton.
  • FIG. 24 A cross sectional view through an assembled device is shown in Figure 24. As shown in Figure 24 a blade 109 secured to the handle 97 moves about the annular hinge 100 within the recessed upper part 101 of the housing.
  • the tongue 108 is positioned between the wings of a carton and the ridge is pushed fully into the slot 105.
  • the length of the slot 105 ensures that the ridge is severed below the sealed closure for half the width of the ridge.
  • a force is then applied between the handles 97 and 103 so that the blade 109 progressively severs the ridge along the line 10 (shown on Figure 2).
  • the device is withdrawn from the carton and the severed portion of the ridge is folded back to free the wings so that the carton may be opened by applying pressure to the wings (as shown in Figure 4).
  • the device is made from a plastics acetal copolymer material available from Hoescht under trade name "HOSTAFORM". Suitable blades are available from Swann Morton Limited of Sheffield. It will be appreciated that if the two part housing is made so that it may be dismantled, the blade may be replaced when worn. As the device provides a single cut action there is no requirement for a return spring, however, a return spring arrangement may be readily incorporated.
  • an additional bifurcated tongue may be provided on the upper part 101 of the housing to form a mirror image of the tongue 108 on the lower part 102.
  • the blade is substantially symmetrically positioned in the housing such a device can be used equally well by left-handed and right-handed people.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Cartons (AREA)
  • Knives (AREA)

Claims (9)

  1. Gerät zum Öffnen von Kartons, die ein Rippenoberteil mit einem geflügelten, abgedichteten Rippenverschluß aufweisen, umfassend
    einen länglichen Schlitz (105) zum Aufnehmen des geflügelten, abgedichteten Rippenverschlusses des Kartons,
    ein Trennmittel (109) zum Abtrennen eines Teils des abgedichteten Verschlusses an einem Ende des Verschlusses entlang mindestens einer ersten Fläche und
    ein Begrenzungsmittel (88) zum Begrenzen der Länge entlang der ersten Fläche entlang der der abgedichtete Verschluß getrennt wird,
    dadurch gekennzeichnet, daß ein Führungsmittel (38, 75, 94, 108) vorgesehen ist, das eine längliche Form aufweist, in einem Abstand zu der ersten Fläche angeordnet ist, sich in der Richtung der Längserstreckung des Führungsschlitzes erstreckt und zum Eingriff unter der Rippe an dem zu trennenden Ende vorgesehen ist, um das Gerät beim Abtrennen zu fixieren.
  2. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß das Führungsmittel eine gegabelte Zunge (108) ist, die sich an der Unterseite des Geräts in einer im wesentlichen zu der ersten Fläche parallelen Anordnung erstreckt.
  3. Gerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das erste Trennmittel ein Mittel zum Scherenschneiden, Parallelschneiden oder Schnipselschneiden ist.
  4. Gerät nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß das Gerät einen Schneidtiefenanschlag (50) zum Abstützen auf dem abgedichteten Verschluß während des Trennens aufweist.
  5. Gerät nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Gerät zwei Führungsmittel aufweist, die auf gegenüberliegenden Seiten des Geräts symmetrisch angeordnet sind.
  6. Gerät nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Gerät durch einen Motor angetrieben wird.
  7. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß das Trennmittel ein erstes Schneidwerkzeug (21) zum Trennen entlang der ersten Fläche und ein zweites Schneidwerkzeug (22) zum Trennen des abgedichteten Verschlusses entlang einer zweiten Fläche, die die erste Fläche im wesentlichen in der Mitte der Länge des abgedichteten Verschlusses und in einem Winkel zwischen 45° und 150° schneidet, aufweist.
  8. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß das Trennmittel ein Schneidmesser oder Schneidklingen (89, 90) umfaßt.
  9. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß das Führungsmittel (75) zwischen einer offenen Stellung zum Aufnehmen der Rippe und einer geschlossenen Stellung zum Festklemmen des Geräts an dem Karton verschwenkbar ist.
EP94921725A 1993-07-28 1994-07-26 Gerät zum öffnen von kartons Expired - Lifetime EP0711237B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB939315556A GB9315556D0 (en) 1993-07-28 1993-07-28 Carton opening device
GB9315556 1993-07-28
PCT/GB1994/001606 WO1995003975A1 (en) 1993-07-28 1994-07-26 Method and device for opening cartons

Publications (2)

Publication Number Publication Date
EP0711237A1 EP0711237A1 (de) 1996-05-15
EP0711237B1 true EP0711237B1 (de) 1999-03-10

Family

ID=10739524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94921725A Expired - Lifetime EP0711237B1 (de) 1993-07-28 1994-07-26 Gerät zum öffnen von kartons

Country Status (8)

Country Link
EP (1) EP0711237B1 (de)
AU (1) AU7232994A (de)
CA (1) CA2168224A1 (de)
DE (1) DE69417038T2 (de)
ES (1) ES2129132T3 (de)
GB (2) GB9315556D0 (de)
WO (1) WO1995003975A1 (de)
ZA (1) ZA945596B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9522738D0 (en) * 1995-11-07 1996-01-10 Ireland William A Improvements in or relating to knives
ES2154202B1 (es) * 1998-12-23 2001-10-16 De La Infanta Enrique Garcia Accesorio de apertura-cierre para envases tipo brik.
WO2002064329A1 (en) * 2001-02-15 2002-08-22 Corner Cutters Ltd. Hand-held cutting device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH446093A (fr) * 1965-03-15 1967-10-31 Roger Bajulaz S A Dispositif pour ouvrir un emballage en forme de tétraèdre
US3803713A (en) * 1971-11-26 1974-04-16 J Lemmon Carton opening cutter
US4291461A (en) * 1979-08-24 1981-09-29 Val Hansen Knife guide device for opening of milk and soft drink paper cartons
FR2557553B1 (fr) * 1983-12-30 1986-12-12 Beuzart Gilles Dispositif de manutention d'ouverture-fermeture, et de conservation etanche de produit liquide contenu en emballage non rigide

Also Published As

Publication number Publication date
ZA945596B (en) 1995-05-25
DE69417038T2 (de) 1999-10-07
GB9315556D0 (en) 1993-09-08
AU7232994A (en) 1995-02-28
GB2295136B (en) 1997-04-30
DE69417038D1 (de) 1999-04-15
CA2168224A1 (en) 1995-02-09
GB9601641D0 (en) 1996-03-27
WO1995003975A1 (en) 1995-02-09
ES2129132T3 (es) 1999-06-01
EP0711237A1 (de) 1996-05-15
GB2295136A (en) 1996-05-22

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