1. Field of the Invention
This invention relates to a wrap-around carrier which is held together by a secondary locking system with overlapping flaps without the necessity of using any primary locking system.
2. Background
When fabricating a carrier from a paperboard blank, opposite ends of the blank are conventionally attached to each other by glue or by mechanical locks to form the bottom panel of the carrier. In the case of a wrap-around carrier, flaps located on the ends of the blank typically are overlapped and engaged with one another by mechanical locks formed in the flaps to form the bottom panel of the carrier. Since the bottom panel must maintain its integrity throughout the use of the carrier, it is essential that the locking system be capable of supporting the weight of the packaged articles, and remain engaged during shipping and handling of the constructed carrier.
The conventional way of providing a stable mechanical lock for a wrap-around carrier utilizes both primary and secondary locks. The secondary locks are basically a “back-up” to primary locks.
When containers with flat bottoms are placed in a wrap-around carrier in two rows, it is difficult to lock a primary lock system as the male locks will be prevented from locking by the bottoms of the containers It would also be desirable to provide a wrap-around carrier which only has a single locking system as it would result in a significantly saving of the material, such as paperboard, used to construct the carrier.
This invention provides a wrap-around container carrier which is locked together by a single locking system. This carrier has a top panel, opposite side panels and a bottom panel which is formed from an inner bottom flap and an outer bottom panel which is foldably attached to an outer secondary locking flap. The outer secondary locking flap overlaps a portion of the inner bottom flap with the flaps being held together by at least one secondary male lock formed as an extension of the outer secondary locking flap. The inner bottom flap has a secondary female opening for each secondary male lock. This secondary female opening is formed by a slit and an innerconnecting fold line which forms a female flap in the female opening. This female flap leans against the secondary male lock when it has been extended through the female opening to assist in holding the secondary male lock in the vertical locked position in respect to the inner bottom flap so the lock does not become accidentally disengaged. Each secondary male lock and corresponding female opening in the carrier are located between the two rows of containers.
This container carrier is especially usefully for carrying light weight containers with flexible side walls which contain a liquid or a semi-liquid. The liquid in the containers tends to result in an outward bulging of the side walls of the container caused by the weight of the liquid in the container. When these containers are placed in two rows and the wrap-around carrier wrapped around the containers is tightly locked, the slight bulging of the side walls of the containers adjacent the side panels of the carrier results in a corresponding bulging in the side panels of the carrier which pulls and holds each secondary male lock in the vertical locked position. The bulging of the side panels of the carrier creates tension in the carrier which pulls and holds each secondary male lock in the vertical locked position in respect to the inner bottom flap so the lock does not become accidentally disengaged. The inside walls of the containers are pushed to a vertical position by the tightening of the carrier which aids in holding the secondary male locks in the vertical position.
The female flap formed from the secondary female opening may have an arcuate tab to assist in holding the secondary male lock in the vertical position.
The carrier of this invention is especially useful for carrying containers with flexible side walls which contain a liquid or semi-liquid. Examples of such containers with flexible side walls are the square PET bottles, Tetrapak® containers and yogurt containers with flexible side walls. The secondary locking system of this invention is especially usefully with light containers e.g. six to ten ounces.
The carrier of this invention preferably has means for preventing the containers from falling out of the ends of the carrier, which preferably consists of the top panel having two ends with a top end panel attached to each end of the top panel of the carrier with the top end panels being capable of being folded into a closed position on a wrap machine when the top end panel is closed by pressure from a three piece web connected by fold lines, said web interconnected by fold lines to each side panel and adjacent top end panel and consisting of a triangular shaped gusset panel connected by a fold line to a top end panel and in turn connected by a fold line to a triangular shaped web panel which in turn is connected to a tuck-in panel connected by a fold line to an adjacent side panel, said tuck-in panel having a holding tab attached away from the connection to the side panel to hold the top end panel in the closed position.
The carrier of this invention may have one or two top dispenser flaps in the top panel which extend into the adjoining side panels which may be torn open for the easy removal of the containers in the carrier. A carrying handle may be provided in the top panel adjacent to the top dispenser flap for carrying the carrier.
These and other objects, features, and advantages of the present invention will become more apparent upon reading the following specification in conjunction with the accompanying drawing figures.
Many aspects of the invention can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The present invention is intended primarily for use in wrap-around carriers for containing containers filled with a liquid or semi-liquid having flexible side walls. In the present invention, a single locking system is used in a wrap-around carrier without any “back-up” locking system. The locking system used in this invention is a secondary locking system without using any primary locking system. This secondary locking system is especially useful with containers which have flexible side walls. When these containers with flexible side walls contain a liquid or semi-liquid, the weight of the liquid pushes against the side walls of the containers which in turn push against the side panels of the carrier creating tension on the male lock which holds it in the vertical locked position. The term liquid is used to include both conventional liquids and semi-liquids.
The blank for forming the carrier of this invention is illustrated in
This carrier 10 has apertures 50 for containing the heels of containers contained therein. The tops of the containers are restrained from falling out of the ends by the top end panels. Top end panel 52 is connected to top panel 30 by fold line 54. Top end panel 52 is connected to triangular gusset panel 56 by fold line 58 which in turn is connected to triangular web panel 60 by fold line 62. Triangular web panel 60 is connected to tuck-in panel 64 by fold line 66, which in turn is connected to upper side panel 26 by fold line 68. Tuck-in panel 64 has a holding flap 70 for holding top end panel 52 in proper position in contact with the end containers in the carrier.
In a similar fashion, top end panel 72 is connected to top panel 30 by fold line 74. Tuck-in panel 72 is connected to triangular gusset panel 76 by fold line 78 and in turn connected to triangular web panel 80 by fold line 82 and finally connected to tuck-in panel 84 by fold line 86. Tuck-in panel 84 is connected by fold line 88 to upper side panel 26. Tuck-in panel 84 has a holding flap 90.
Top end panel 52 is connected to triangular gusset panel 92 by fold line 94 and in turn connected to triangular web panel 96 by fold line 98. Triangular web panel 96 is connected to tuck-in panel 100 by fold line 102. Tuck-in panel is connected to upper side panel 34 by fold line 104 and has a holding flap 106. End panel 72 is connected to triangular gusset panel 108 by fold line 110 and in turn connected to triangular web panel 112 by fold line 114. Triangular web panel 112 is connected to tuck-in panel 116 by fold line 118, which in turn is connected to upper side panel 34 by fold line 120. Tuck-in panel 116 has a holding flap 122.
As previously mentioned, the carrier of this invention is unique in that it has only a secondary locking system, and no primary locking system. Secondary male locks 124A-D are connected to outer secondary locking flap 12 by fold line 126. The secondary female locking system is located in inner bottom flap 46 and has secondary female flaps 128A-D formed by cut lines 130A-D. The secondary female flaps 128A-D have fold lines 132A-D for folding the flaps into the locked position. These secondary female flaps 128A-D assist in holding the secondary male locks 124A-D in the vertical locked position. Arcuate tabs 134A-D may be provided to assist in holding the secondary male locks 124A-D in the vertical locked position. The secondary male locks 124A-D extend through the secondary female openings as best shown in
It will be understood by those in the art that the preferable carrier is symmetrical about a horizontal line of bisection, as viewed from
Unlike conventional locking systems, the carrier of this invention does not include both a primary locking system and a secondary locking system. Rather, it has been found that a secondary locking system alone will satisfactorily hold the carrier together, especially when carrying containers with flexible side walls which are filled with a liquid.
It will be noticed from
This invention provides a single locking system, which is a secondary locking system, which securely locks the wrap-around carrier filled with containers. It is important that the secondary male locks 124A-D are held in the vertical locked position in respect to the inner bottom flap 46. The secondary female flaps 128A-D assist in holding the secondary male locks 124A-D, respectively, in their vertical locked position. The arcuate tabs 134A-D further assist in holding the secondary male locks 124A-D in their vertical locked position.
The wrap-around carrier of this invention is formed from the blank of
The blank 10 is pulled tight about the containers C1 and C2 and the outer secondary locking flap 12 is lapped over the inner bottom flap 46 with the outer secondary locking flap 12 being on the outside of the carrier. Slits 136 facilitate locking the locks one at a time. The secondary male locks 124A-D are bent along fold line 126 and are punched in where they enter into primary female openings (e.g. 127D in
As the blank 10 is pulled around the containers C1 and C2 and locked, the weight of the liquid L in the containers pushes outwardly against side walls 150A″ and 150B″ of containers C1 and C2 respectively as shown in
Top end panels 52 and 72 are pushed inwardly into the end containers by pushing tuck-in panels 64, 84, 100 and 116 and the respective triangular shaped web panels 60, 80, 96, and 112 and the triangular gusset panel 56, 76, 92 and 108. Holding flaps 70, 90, 106 and 122 hold the top end panels 52 and 72 in proper position with the holding flaps being between the container and the sides of the carrier.
The locking system of this invention consists of a single secondary locking system which works in combination with the pressure exerted directly on the secondary male locks by the liquid in the containers and on the carrier by the liquid in the containers which provides the tension on the carrier to hold the secondary male locks 124A-D in the vertical locked position. The secondary female flaps 128A-D assist in holding the secondary male locks 124A-D in the vertical lock position. Additional assistance in holding the secondary male locks 124A-D in the vertical locked position may be provided by placing arcuate tabs 134A-D on each secondary female flap 128A-D which lean against the secondary male locks 124A-D.
The secondary locking system in combination with the force provided by the liquid in containers with flexible side walls eliminates the need for having a primary locking system. It is especially useful in wrapping containers that have flat bottoms where there is no room to have a primary locking system as its locking would be impeded by the flat bottoms of the containers. This invention also permits a reduction in the amount of material, such as paperboard, used to construct the carton. The longitudinal dimension A-A′ of the blank can be reduced by two to three percent by eliminating the primary locking system, but still provide a locking system that is secure.
The locking system of this invention works best with containers with flexible side walls that have a cross-section that is square or rectangular. However, the secondary locking system of this invention also works with containers that have a round cross section and have flexible side walls.
This carrier is designed to be erected on a static feedlock system where there are no moving parts with compression fingers pulling the carrier together by the heel apertures. The carrier is pulled together somewhat beyond what is required for locking and then the locking becomes secure as the compression is relaxed allowing the pressure from the liquid in the containers being carried to secure the locks. This carrier is locked by a spring lifting inner bottom flap 46 upwardly with the secondary male locks 124A-D being pushed in by a stationary mechanism. The secondary locking panel 12 is wrapped around a rod in the packaging machine while another rod inserts the secondary male locks 124A-D into the secondary female opening (e.g. 127D) with the secondary male lock (124D) being held in the vertical position as shown in
Because of the resiliency of the containers, compression on the heel apertures can overcompensate in locking the locking mechanism which is then slightly loosened after the lock has been set. This can be arranged between the locks so that they can be locked one at a time without putting undue stress on the adjoining lock.
The carrier of this invention may have a handle and one or more dispensers.
The carrier of this invention may have one or more top dispenser flaps 164A and B as shown in
Top dispenser flap 164A has a tear line 168A that extends through middle side panel 22 into upper side panel 26. A similar tear line is located on the opposite side of the carrier (not shown). The carrier illustrated in
Using top dispenser flap 164A as an example, this flap can be torn opened by inserting the hand into aperture 172A and pulling upward along cut line 166A and towards top end panel 52. This will result in tearing along stress relieving line 162A and the corresponding stress relieving line on the other side of the carton which will extend into tear line 168A and the corresponding tear line on the other side of the carton. If the tearing along tear line 168A and corresponding tear line on the other side of the carton is completed, then top dispenser flap 164A is totally removed from the carrier. The tearing can be stopped prior to the removal of top dispenser flap 164A as long as containers C can be removed from the carrier. Top dispenser flap 164B can be opened and removed in the same fashion by pulling along cut line 166B. This carrier can be provided with one or two top dispenser flaps. It should also be realized that the handle 156 can be placed in the carrier without having any top dispenser flap. Similarly one or more top dispenser flaps can be located in the carrier without the inclusion of a handle.
While the invention has been disclosed in its preferred forms, it will be apparent to those skilled in the art that many modifications, additions, and deletions can be made therein without departing from the spirit and scope of the invention and its equivalents as set forth in the following claims.
This is a continuation-in-part application of U.S. patent application Ser. No. 10/183,935, entitled Improved Carton Lock, of which Robert L. Sutherland is the inventor, which was filed on Jun. 27, 2002, now abandoned which is hereby incorporated by reference.
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Number | Date | Country |
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Number | Date | Country | |
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20040099542 A1 | May 2004 | US |
Number | Date | Country | |
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Parent | 10183935 | Jun 2002 | US |
Child | 10703704 | US |