US3474899A

US3474899A - Making of a combined package of filled tetrahedral containers

Info

Publication number: US3474899A
Application number: US698013A
Authority: US
Inventors: Lennart Inge Carlsson; Lars Goran Andersson
Original assignee: Tetra Pak AB
Current assignee: Tetra Pak AB
Priority date: 1967-01-31
Filing date: 1968-01-15
Publication date: 1969-10-28
Anticipated expiration: 1986-10-28
Also published as: FR1551821A; SE340983B; NL6801071A

Description

O 1969 1.. l. CARLSSON ETAL MAKING OF A COMBINED PACKAGE OF FILLED TETRAHEDRAL CONTAINERS Filed Jan. 15, 1968 INVENTORS LE NNART l. CAR LSSON LARS G. ANDERSSON M [L M ATTORNEY United States Patent Office 3,474,899 Patented Oct. 28, 1969 Int. Cl. B65d 79/00 U.S. Cl. 206-47 1 Claim ABSTRACT OF THE DISCLOSURE Package of filled tetrahedron shaped containers and drinking straws held together by a film of heat shrinkable material heat shrunk therearound.

The present invention concerns the making of a combined package of filled tetrahedral containers. The purpose of the invention is primarily to facilitate the distribution and sale of small sizes of tetrahedral containers, viz. those with volumes of /2 litre or less. There has long been a great need for combined packages of the smaller sizes of package due to a variety of reasons, of which a few examples will be given.

When selling fruit drinks in self-service shops, containers are placed in the shops in the hexagonal cartons in which they are delivered from the manufacturer. It has in connection with this been found that appreciable quantities of packages disappear in the shops as a result of theft. It seems that the small size of the package is of decisive influence as far as the attractiveness of the object is concerned. An essential advantage of the invention is that theft is made very much harder by displaying the packages in larger units.

When selling fruit drinks or similar articles packed in tetrahedral containers, a straw which is to be inserted through the wall of the package is generally also included. It is usual in self-service shops for the customer to receive the straw when he passes the cash desk, in order that stealing of straws inside the shop should not be possible. The method is time-wasting and on the whole impractical, :and thus a further advantage of the invention is that this problem can be solved by the combined package being provided with the number of straws corresponding to the number of tetrahedral units, such straws being protected under the wrapping of the combined package.

A further advantage of the invention is that distribution of goods to the shops is facilitated. Tetrahedral packages have earlier been carried in hexagonal cartons which in their turn were packed in fours in outer square cartons. The number of tetrahedral packages in the hexagon cartons was usually eighteen. For many sales outlets, however, this is too large a number, half this being perhaps more suitable. It is obvious that it is time-wasting and consequently uneconomic to take a number of tetrahedral packages out of the hexagonal cartons at the time of delivery. It is however possible to dispense with the hexagonal cartons as a result of the invention, the combined packages being carried instead in the outer square cartons direct. By this means the merchandise can be delivered quicker in the desired quantity, at the same time as the total packaging cost is substantially reduced as a result of the hexagonal cartons being eliminated.

Under the invention, combined packages are fan shaped. This makes it possible for them to be packed very tight in the outer square container when properly stacked. The individual combined packages will also be very stable and durable as a result of the characteristic configuration according to the invention. Combined packages, in :accordance with a preferred form of the invention, are fixed in their fan-shaped configuration by a shrinkable film of plastic. It is best for this to be shaped like a wrapper which will run over those edges of the tetrahedrons which are turned toward the outside of the fan and over the sides of the two outer tetrahedrons in the fan which are situated opposite these edges. The sharp points of the fins on the tetrahedrons, by virtue of the fact that the shrinkable film shrinks over them and that they penetrate deep into the film without being pushed right through this, prevent the wrapper slipping out of position. The grip of the wrapper around the tetrahedral units is thus ensured under even comparatively rough handling. Sliding of the tetrahedron units relative to one another is also prevented by the friction between them being considerably increased as a result of the shrinkage.

The way in which the combined package in accordance with a preferred method can be made up is shown in the figures.

FIGURE 1 showing a side view of the combined package, and

FIGURE 2 is a view of the same package from underneath.

The combined package shown in the figures consists of three

containers

1, 2 and 3 shaped in the main as regular tetrahedrons. The tetrahedral containers have finshaped

sealing areas

4 and 7, 5 and 8 and 6 and 9 respectively. The sides to be seen on FIGURE 1 are denoted 10, 11 and 12 respectively, while the sides of

tetrahedrons

1 and 3, to be seen on FIGURE 2, are denoted 14 and 15 respectively.

A strip 13 of heat-shrinkable plastic, which is jointed 20 to form an endless wrapper, is drawn over the three tetrahedrons. The wrapper 13, as shown in the figures, runs parallel to the plane defined by

fins

4, 5 and 6 and thus surrounds the group of tetrahedrons in their longitudinal direction. Three straws 16 are placed between film 13 and

sides

14 and 15.

When the film is heated, it shrinks so as to attain the general shape shown in the figures, that is to say, to adhere onto the sides adjacent to

fins

4, 5 and 6, such as

sides

10, 11 and 12 in FIGURE 1 and onto

sides

14 and 15 opposite these fins. The points on

fins

4, 5 and 6 penetrate deep into the film without however making a hole in this, the film being thereby firmly fixed in the position attained as a result of heating. Two of the fin points acting in this way have been denoted 17 and 18 in FIGURE 1 and the portion of film between them 19. The length of the wrapper is reduced by shrinkage, causing the tetrahedrons to press against one another. Friction between individual tetrahedrons is thus increased and sliding of these relative to one another practically eliminated.

That which is claimed is:

1. A combined package of filled tetrahedron shaped containers comprising at least three tetrahedron shaped packages, said packages each having one end seal overlapping at least one end seal of the other packages, the other end seals of the packages forming a fan shape, a continuous heat shrunk film wrapper running over the edges of said tetrahedrons turned toward the outside of said fan shape and over those edges of the outer tetra- 3,217,874 11/1965 Potter. hedrons which are situated opposite those edges to hold 3,261,461 7/1966 Fontana. said packages in said fan shape, and a number of straws at least equal to the number of tetrahedrons located be- FOREIGN PATENTS tween said film and said overlapping edges of said tetra- 204,696 5/ 1966 hedrons. 5

References Cited MARTHA L. RICE, Primary Examiner UNITED STATES PATENTS c1- r 2,843,259 7/1958 Metzger 206-47 20665 3,126,680 3/1964 Baird et a1. 10