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
  • B65D5/42—Details of containers or of foldable or erectable container blanks
  • B65D5/72—Contents-dispensing means
  • B65D5/74—Spouts
  • B65D5/746—Spouts formed separately from the container
• • 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
  • B65B7/00—Closing containers or receptacles after filling
  • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
  • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
  • B65B7/2842—Securing closures on containers
  • B65B7/285—Securing closures on containers by deformation of the closure
• • 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
  • B65D47/00—Closures with filling and discharging, or with discharging, devices
  • B65D47/04—Closures with discharging devices other than pumps
  • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
  • B65D47/12—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having removable closures
  • B65D47/121—Stoppers
• • 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
  • B65D2401/00—Tamper-indicating means
  • B65D2401/15—Tearable part of the closure

Definitions

• This invention relates to a new and improved spout fitment and a plug type cap for closing same. More particularly, the invention relates to a fitment which fits around a hole in a panel of a paperboard carton or around a hole in a flexible container such as used for packaging liquid products and powders and to a closure for such fitment. The invention is further characterized in that it is tamper evident. More particularly, the invention relates to a unitary fitment and closure molded in a single mold wherein the cap and the fitment are molded axially spaced apart.
• An elongated tear tab (which is one of the elements of the tamper-evident feature of the assembly) extends from the fitment up to the cap and functions during the molding process as a "runner."
• plastic material flows into the portion of the mold which forms the cap, thence down the tear tab runner and finally into the portion of the mold which forms the fitment.
• the cap may be assembled with the fitment as part of the molding process in that as the core of the mold retracts, the cap is drawn along with the core and assembles the two components together. The cap is then stripped from the core since the cap can move no further.
• the invention is applicable to packaging having long shelf-life wherein a separate piece of foil or plastic material is welded to the underside of the flange of the fitment and, optionally, to the bottom edge of the cap.
• prior fitments have spouts formed with external threads closed by caps with internal threads. So e fitments are used in conjunction with plastic bag containers, the fitment being integrally welded to the plastic bag. Other prior art fitments are attached to a polymer- coated paperboard container, such as a gable-top, container which, optionally, may be lined with foil or plastic. Prior art fitments for paperboard cartons usually include a thin flange which is welded to the polymer-coated paperboard surface of the container.
• Fitments of the prior art have a number of deficiencies as compared to the present invention.
• they employ multiple components which increase the cost of the combination very greatly over the simple structure of the present invention.
• the assembly is difficult and often involves rotary equipment which is difficult to control in practice and is expensive to install.
• the diameter of the opening in the spout is restricted inasmuch as there is only limited space on the panel of the container on which the flange can be located, thereby reducing the diameter of the fitment flange and correspondingly the internal diameter of the spout.
• a fitment having a spout into which the skirt of the cap fits is provided. Either the spout and cap skirt are formed with mating threads or the telescoping surfaces are so formed that they are engaged when assembled.
• a feature of the present invention is that the cap and fitment are molded together in a single mold, and the portion of the cavity which forms the cap is spaced from the portion which molds the fitment. The two portions are interconnected by a runner which ultimately comprises an elongated tear tab for the tamper-evident features of the assembly of cap and spout. The tab may be made long enough to be conveniently gripped by the consumer by reason of the fact that the two mold cavity portions are spaced apart.
• the core which forms the interior of the cap as it moves downward relative to the spout, pulls the cap with it and assembles the cap and spout together by the time the molding operation is completed.
• the interior of the cap may be formed with an internal ring which seats in a groove in the mold core and prevents dislodgment of the core from the cap until the completion of the assembly operation.
• the cap may be formed with an internal groove and the mold core with a ring to effect the same operation.
• connection between the runner (tear tab) and the cap is frangible and ruptures through a sub-gating design.
• the subgate ruptures when the cavity is first removed.
• the tear tab slides relative to the cap.
• locking lugs on the tab slip through a hole in a flange extension of the cap to lock the system together in a tamper-evident manner.
• the fitment is then inserted through the hole in the container, and the flange of the fitment is welded to the container.
• a foil disk of the same or greater diameter than the flange of the fitment is attached to the underside of the flange by welding, and the foil may also welded be to the bottom edge of the plug which fits into the spout of the fitment.
• the assembled fitment and plug are inserted through the opening in the container panel from the inside of the container and, if the foil is larger than the flange the foil may be welded to the underside of the container panel in liquid-tight fashion. Even if the foil is smaller than the flange, entry of air, odors, etc. into the container is inhibited, as hereinafter explained, increasing the shelf life of the product packaged in the container.
• mating seals are provided which inter ⁇ engage when the cap is seated in the fitment preventing leakage.
• the spout is formed with a continuously smooth seal bead.
• the lower portion of the cap is likewise smooth.
• the seal bead engages the skirt in air-tight manner, even after initial opening of the container.
• Fig. 1 is a side elevational view of the cap and fitment at the stage of the molding operation where molding is completed but prior to retraction of the mold core.
• Fig. 2 is a top plan view of the structure of Fig. 1.
• Fig. 3 is a sectional view taken substantially along the line 3 — 3 of Fig. 2.
• Fig. 3A is a view similar to Fig. 3 of a modification.
• Fig. 4 is a side elevational view of the cap and spout of Fig. 3 assembled together and installed on a container, the view being partially broken away in section to reveal internal construction.
• Fig. 4A is a view similar to Fig. 4 of the modification of Fig. 3A.
• Fig. 5 is a view similar to Fig. 1 of a further modification.
• Fig. 6 is a top plan view of the structure of Fig. 5.
• Fig. 7 is a vertical sectional view taken substantially along the line 7 — 7 of Fig. 6.
• Fig. 8 is an enlarged vertical, sectional view of the assembled structure of Fig. 7 applied to a container panel and also showing an aseptic foil attached thereto.
• Fig. 9 is a schematic view showing completion of the molding of the intermediate product of Fig. 3A and a vertical sectional view through the mold for molding same.
• Figs. 10-13 are sequential views of the mold of Fig. 9 until discharge of the assembled plug and fitment.
• Fig. 14 is an enlarged sectional view of a portion of the product shown in Fig. 9.
• Fig. 14A is a sectional view taken along line 14A—14A of Fig. 14.
• Fig. 15 is a fragmentary sectional view of a portion of the core of Fig. 9 and surrounding components of a modified construction.
• Fig. 16 is a view similar to Fig. 8 of a modified foil barrier.
• Fig. 17 is a fragmentary sectional view of a further modification of Fig. 8.
• Fig. 18 is a fragmentary sectional view of another modified fitment and closure prior to assembly.
• Fig. 19 is a view similar to Fig. 18 of still another modification.
• Fig. 20 is a fragmentary sectional view of the structure of Fig. 19 assembled and installed on a carton panel.
• Fig. 21 is a view similar to Fig. 18 of another modification.
• Figs. 22 and 23 are vertical sectional views of a modification showing a different means for attachment to the container around a container orifice.
• the portion of the mold cavity which molds the fitment being connected to the portion of the cavity which molds the cap by means of a runner which, as hereinafter explained, comprises the tear tab 42.
• the tear tab 42 sliding upwardly relative to the cap 12.
• cap 12 comprises a top 16 from the periphery of which depends skirt 17.
• the exterior of the upper portion of skirt 17 is formed with external vertical ribs 18 which assist the user in unscrewing the cap after assembly.
• An outward extending flange 19 is formed at the lower ends of the ribs 18 having a shoulder 21 on its underside.
• a seat 22 which comprises an enlargement on the exterior of skirt 17.
• External threads 23 are formed on the portion of skirt 17 below the seat 22.
• Cap 12 terminates in a lower, bottom edge 24; and one of the features of the present invention is the fact that the external surface 39 of the skirt above bottom edge 24 is smooth so that it may seal against the fitment 11 in assembled position.
• Internal bead 26 may be formed on skirt 17 just above the level of flange 19.
• the bead 26 is formed by a groove in the core of the mold, as hereinafter explained.
• the function of the bead 26 is the insure that the cap 12 retracts with the core just prior to the completion of the molding operation.
• the underside of space 27 is formed with a bevel 29 below aperture 28.
• the fitment portion 11 comprises an annular flange 31 having an upward offset 32 at its inner edge merging into an annular rim 33 parallel to flange 31. Extending up from the inner edge of rim 33 is spout 34 which has an upper edge 36 with a peripheral flange 35 dimensioned to fit against the shoulder 21 in the assembled position shown in Fig. 4.
• the seat 22 of cap 12 fits immediately inside the upper edge of the spout 34.
• Internal threads 37 are formed on the interior of spout 34 shaped to mesh with the threads 23.
• the materials of which the fitment 11 and cap 12 are molded are sufficiently flexible so that when the cap 12 is pulled down relative to the fitment 11, the threads 23 and 37 slip past each other and then interengage.
• a seal ring 38 slants downward-inward to engage the smooth surface 39 on the exterior of skirt 17 below threads 23.
• the primary seal of the fitment and cap is preferably the seal of surface 38 with smooth surface 39.
• FIG. 3A and 4A A modification of the structure of Figs. 3 and 4 is shown in Figs. 3A and 4A, respectively.
• the seal ring 38a is located spaced above the lower end of the spout 34a and this and the ring 38a engages the smooth exterior 39a of skirt 17 spaced upwardly from the bottom edge of said skirt.
• Both the ring 38a and the surface 39a are smooth and are characterized by the absence of parting lines. Hence, a leak-proof seal is readily achieved.
• a flange 35 projecting outward at the upper end of spout 34 immediately below edge 36 is a flange 35 and extending vertically upwardly in alignment with aperture 28 is tear tab 42 which, as heretofore explained, functions as a runner to deliver molten plastic from the cap to the fitment during the molding process.
• a notch 43 is made in the outer, lower corner of the juncture of flange 35 and tab 42 so that the tab 42 may be torn off. So long as the tab 42 is connected to fitment 11, however, the assembly shown in Fig. 4 is tamper evident.
• tangs 44 Extending outwardly and inwardly of tab 42 above upper edge 36, at a distance slightly greater than the thickness of space 27, are tangs 44. When the two parts are drawn together as shown in Fig. 4, tangs 44 slip through the aperture 28 and lock above the space 27, preventing the parts from being disassembled so long as the tab 42 is attached to the fitment 11.
• the assembly of fitment 11 and cap 12 may be installed on a panel of container 51 having a hole 52 dimensioned therein which is approximately equal to the outside diameter of offset 32.
• the assembly of fitment and cap is inserted through hole 52 from below panel 51 as viewed in Fig. 4.
• Projections 47 on offset 32 may be used to engage the top surface of container 51 to hold fitment 11 in place.
• the flange 31 is welded or otherwise permanently secured to the polymer surface of container panel 51.
• flange 31a extends straight out from spout 34a and there is no offset such as offset 32 shown in Figs. 1-4.
• the paperboard carton 51a is welded to the flange 31a on the exterior of paperboard 51a.
• the paperboard 51a is welded to the exterior of flange 31a.
• Figs. 9-15 illustrate the molding sequence for the fitment lla and closure 12 illustrated in Fig. 3A.
• Fig. 9 shows the parts of the mold and the intermediate product consisting of fitment and cap at the conclusion of the molding operation.
• the mold parts are, of course, illustrated schematically and the means for actuating movement thereof are not shown but will be well understood by those skilled in the plastic molding art.
• Core 71, cavity 76 and slide 74 are machined to provide clearances (herein "voids") between abutting surfaces which are filled with plastic material to form the mold parts.
• voids clearances between abutting surfaces which are filled with plastic material to form the mold parts.
• Figs. 14 and 14A Steel portions of cavity 76 form the triangular voids below subgates 77. As the cavity moves from the position of Fig. 9 to the position of Fig. 10, the steel cuts between the subgates 76 and tab 42a, the subgates flexing to permit this cutting movement.
• a rim 86 is formed upstanding at its outer edge and radial gussets 87 join skirt 17 and rim 86. As shown in Fig. 11, the slides 74 retract. In this position the intermediate product of cap and fitment rest on the exterior of core 71 and above ejection ring 73.
• core 71 retracts further while ring 73 remains stationary. As this operation is performed, because of the groove 78 in core 71 (see Fig. 10) and the fact that the presence of such groove 78 has formed the internal bead 26, the cap is pulled downward toward the fitment. During this movement pull tab 42a moves upward through aperture 28 until the tangs 44a engage the upper surface of flange 35. Threads 23 and 37a slip past each other and then interengage. Shoulder 21 engages flange 35a, limiting further movement of cap 12 relative to fitment lla. The fitment and cap are now assembled. In Fig. 13, core 71 retracts further causing the ring 26a to disengage from the groove 78 thereby ejecting the end product in assembled condition.
• a groove 78 has been formed in core 71 to provide an internal bead 26a on skirt 17.
• a bead 79 is formed on the core 71a causing formation of a groove 81 in the interior wall of skirt 17A.
• the function of bead 79 and groove 81 is to provide an alternative means to pull the cap downward as the mold parts move from the position of Fig. 11 to the position of Fig. 12.
• Skirt 17c of cap 12c has an external retention bead 61 formed thereon while the interior of spout 34c has an internal retention bead 62 formed therein.
• the beads 61 and 62 fit tightly against each other.
• Top 16c is formed with a peripheral flange 56 which seats upon a peripheral flange 35c on the top edge 36c of fitment lie.
• tab 57 projects outwardly and is formed with an aperture 58 shaped to receive tear tab 42c.
• the tab 57 has an additional use: It may be used to remove the cap 16c from the fitment spout 34c when it is necessary to dispense the contents of the container.
• Fig. 8 shows a further modification of the invention.
• the container is further sealed with a barrier foil 66.
• Asceptic or hermetic packaging can be achieved in this way.
• the foil 66 is larger than the exterior of flange 31c.
• This foil 66 may be of a metal or plastic composition. Adjacent the outer edge of foil 66, it is attached, for example by means of weld 67 to the underside of the container wall 51c and is also welded to the underside of flange 31c and preferably to the bottom edge of skirt 17c.
• weld 67 Adjacent the outer edge of foil 66, it is attached, for example by means of weld 67 to the underside of the container wall 51c and is also welded to the underside of flange 31c and preferably to the bottom edge of skirt 17c.
• the foil 66 keeps the container sterile during transportation and storage.
• the weld 69 is preferably sufficiently secure so that the foil which would otherwise block the aperture is removed along with the cap. Teeth or sharp serrations 90 may be incorporated to assist rupture of the foil so that the removal force is not excessive.
• attachment means other than welds i.e. adhesives or mechanical attachment
• Fig. 8 shows the aseptic foil 66 applied to the structure of Figs. 5-7. However, it will be understood that the same principle may be used in connection with a modification of Figs. 1-4.
• foil 66 extends outwardly beyond the periphery of flange 31e so that it is welded to the underside of carton wall 51c.
• the outer edge of foil disk 66e is spaced somewhat inwardly from the periphery of flange 31e.
• annular zone indicated by X in Fig. 16 where the foil 66 engages the underside of flange 31e.
• the effective diffusion path length for gaseous substances such as oxygen, water vapor or odors is the distance X.
• This extended length combined with the relative thinness of flange 31e (approximately 0.020") produces a relatively extended path for diffusion of gaseous contaminants.
• the embodiment of Fig. 16 is suitable for extended shelf life products despite the fact that the barrier film 66e does not extend outward to engage the underside of the carton 51e.
• the foil 66 is optionally not only welded to the underside of flange 31e but also to the bottom edge 24e of cap skirt 17e.
• the barrier foil 66g is attached to the bottom of the fitment attachment flange and does not extend beyond the periphery of flange 31g.
• the barrier film 66g is attached to the exterior of the carton 51g by a suitable adhesive (not shown) if required.
• the bottom edge 24g of skirt 17g is also welded to the barrier film 66g.
• Fig. 18 illustrates an alternate construction.
• a continuous frangible web connection 96 connects the plug 12h to the top edge 97 circumferentially around the parts.
• the parts may be installed on the container in the condition shown in Fig. 18. So long as the connector 96 is intact, the consumer is assured that there has been no tampering with the container. At the time of consumption, the user fractures the connection 96 either by twisting the closure 12h or other convenient means.
• the closure 12h may be installed on the fitment llh after part of the contents of the container have been dispensed merely by screwing the closure 12h into the spout 34h.
• FIG. 19 shows assembly of the closure 12b in the fitment spout 34b and attachment to the apertured panel 51b.
• the lower end of the fitment lib has a downward extending ring 98 which fits inside the hole 22b and is retained therein by an outward extending barb 99 which engages under the panel 51b.
• an outer seal member 100 engages the top surface of the panel 51b.
• Fig. 19 the parts are shown prior to assembly of the plug to fitment spout. It will be understood that normally closure 12b is attached to the fitment lib before the ring 98 is inserted in the panel 51b.
• a tamper-evident feature is included in the structure of Figs. 19 and 20.
• Surrounding skirt 17b is a narrow tamper-evident band 116 which is connected to the lower ends of ribs 18b by bridges 117.
• At diametrically spaced positions on the underside of band 116 are depending pawls 118 which engage sockets 119 in the upper exterior of spout 34b.
• band 116 may be disconnected from closure 12b and the closure may be unscrewed from fitment lib since pawls 118 are out of sockets 119. Tearing of band 116 gives evidence of tampering with the contents of the container.
• Fig. 21 shows a very simple, tamper-evident construction. No threads are required on the closure or spout. Rather, the exterior of skirt 17d, immediately below ribs 18d is formed with a cylindrical external sealing surface 92 and below surface 92 is an undercut 93 merging into outward curved portion 94. Portion 94 extends around the circumference of closure 12d and is joined to the inner corner of top edge 97d of fitment lid by a frangible circumferential web 96d. Web 96d makes the combination tamper-evident since the container cannot be opened without breaking the same. When the consumer wishes to open the container, closure 12d is disconnected from fitment lid by breaking web 96d by any convenient means. For reclosure purposes, surface 24d contacts seal member 38d.
• fitment llf is applied to a container 101 of any convenient type such as one having an external locking bead 102 below top edge 103.
• Fitment llf has an annular top 106 having upward extending spout 34f.
• the underside of top 106 has an inner skirt or hollow plug 107 which fits inside the wall of container 101.
• Outward of plug 107 is a groove 108 which receives edge 103 and beyond groove 108 is a shoulder 109 which fits against the upper outer edge of container wall 101.
• a peripheral short skirt 111 has an internal bead 112 which locks under bead 102.
• the closure 12f is quite similar to that of Fig. 21.
• the lower edge of skirt 17f is bevelled and is initially connected by frangible connector 96f to the inner edge of the upper end of spout 34f.
• closure as shown in Fig. 22 is tamper-evident.
• the consumer grasps closure 12f, breaking connector 96f.
• closure skirt is inserted in spout 34f and pushed down to assume the closed position shown in

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)

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Family Cites Families (7)

• 1995
  • 1995-10-06 WO PCT/US1995/012983 patent/WO1997012813A1/en not_active Application Discontinuation
  • 1995-10-06 AU AU39526/95A patent/AU3952695A/en not_active Abandoned
  • 1995-10-06 EP EP95937404A patent/EP0873264A1/de not_active Withdrawn

Non-Patent Citations (1)

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