EP0205471A1

EP0205471A1 - Squared circle box for packaging and other uses

Info

Publication number: EP0205471A1
Application number: EP19850905895
Authority: EP
Inventors: Daya Ranjit Senanayake
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-12-10
Filing date: 1985-12-09
Publication date: 1986-12-30
Also published as: IN168313B; WO1986003470A1; AU5193986A

Abstract

L'invention concerne principalement le conditionnement des marchandises, etc. Elle concerne également un dispositif de résistance à la compression utilisé pour des caisses, colonnes et dans d'autres situations de soutènement. Le problème technique de l'écrasement ou de la déformation des emballages, colonnes, etc., sous des charges de compression, est résolu par la mise en oeuvre de certains principes de physique consistant à utiliser un dispositif circulaire, cylindrique ou de forme similaire placé à l'intérieur d'une caisse ou d'un dispositif carrés ou de forme similaire afin d'accroître la résistance à la compression de l'ensemble. L'invention trouve des applications principalement dans le conditionnement du thé, des poudres, liquides etc., en cartons ou conteneurs similaires, ainsi que dans le bâtiment et les travaux publiques, etc.The invention relates mainly to the packaging of goods, etc. It also relates to a compression resistance device used for boxes, columns and in other support situations. The technical problem of crushing or deformation of packaging, columns, etc., under compression loads, is solved by the implementation of certain principles of physics consisting in using a circular, cylindrical or similar device placed inside a box or a square or similar device to increase the compressive strength of the assembly. The invention finds applications mainly in the packaging of tea, powders, liquids etc., in cartons or similar containers, as well as in building and public works, etc.

Description

(1) SQUARED CIRCLE BOX FOR PACKAGING AND OTHER USES DESCRIPTION

(2) The invention relates primarily to the filed of packaging goods of all kinds in their solid,liquid or gaseous states. It also relates to compressive strength provision for boxes, columns, Pillars receptacles and other load bearing situations.

(3) The generally known methods of providing compressive strength to boxes, receptacles and other forms in load bearing situations are through the use of stronger, thicker or heavier materials or sections or through reinforcing these through use of iron or steel or wooden or other reinforcements as for reinforced concrete or in using wooden or other battens or supports as used for cardboard boxes etc.

(4) This invention consists of a circular, conical cylinder, oblong or egg shaped or similar shaped tube or device placed inside a square, Hexagonal or Polygonal, pentagonal, rectangular or triangular box or other similar form, either joined to it or loose fitted with the object of increasing the compressive strength of the whole. This applies to one or more inner devices. ( See drawings - figures 1, 2, 3 and 4).

Figure 1 shows a cutaway section of a Box without an inner cylinder or similar device.

Figure 1 number 1 shows the lines of Force, number 2 shows the Lines of Force at all points along the surface causing buckling.

Figure 2 shows a cutaway section of a Box showing an inner cylinder or similar device.

Figure 2 number 1 shows the Lines of force are distributed radially and conveyed vertically downward. Number 2 is a cutaway section of a Box showing an inner cylinder or similar device.

Figure 3 number 1 shows the direction of compressive load. Number 2 a normal box or similar shaped section, or receptacle. Number 3 the joints can be stapled, fixed by insertion or clips or flapped over. Number 4 shows the inner circular or conical shaped cylinder or tube or oblong, egg shaped or similar shaped device.

Figure 4 is a drawing showing the use of one or more inner circular or conical shaped or egg shaped or ploygonal devices placed inside a square.

In a normal hollow box when a force is applied from above the force attempts- to travel in a direct vertical plane. However the lines of force have to be changed to travel along the horizontal surface (the top surface of the box)at 90° to the original direction of the force to reach the vertical side of the box. As a result the compressive force is being applied to the top surface of the box which buckles and crushes under the force.

When a one or more hollow cylinder or similar shaped devices are placed inside the box the compressive force is transferred directly in the vertical plane along the wall of the Cylinders. It is also transferred radially along the circumference of the cylinder. This device thus becomes a conveyance of the force. The amount of compressive force that the whole can withstand is thus increased substantially. The Slenderness Rule of physics provides that the compressive strength of a cylinder or similar shaped object of a given height increases as as the diameter of the cylinder increases, provided the height and thickness and material and other variables are held constant. The crushing strength of the cardboard carton or similar receptacle in the verticle direction is increased by the provision of one or more tubular corrugated cardboard stiffening struts or struts of other materials located inside the carton on the vertical axis of symmetry of the latter. The stiffness of the strut, i.e. its resistance of buckling, derives from its tubular form, the moment of inertia of which is very much greater than that of a plain sheet of cardboard or other material.

If we consider a sheet of cardboard of a given thickness, length and height, and compare it with acylindrical tube fabricated from a sheet of cardboard of the same dimension, the tube will be found to be a

2 more effective stiffener by a factorof approximately L 2 where:

13t

L - length of the cardboard sheet C not the height) t = thickness of the cardboard i.e. 24² = 576 X 16 = 708.92 13X1/4² 13

That is, if the length of the cardboard is, say 24" and the thickness 1/4" , the tube would be stiffer, in theory, by a factor of around 700. In practice, owing to imperfections in the fabrication of the tube, this factor might more likely be around lOO in commonly encountered situations. Similar principles apply to other materials. Any circular or similar shaped device if placed inside a square, rectangular, triangular, pentagonal, hexagonal or polygonal or similar shaped object to increase the compressive strength or load bearing properties would be an infringement.

(5) The primary advantage of this invention is that it enables a box or other similar form to carry a much greater load without crushing because the inner circle or cylinder or tubular device transfer the compressive load radially and increases the load bearing capacity of the whole.

For example a 5 Ply corrugated cardboard box measuring 24" (height) X 16" x 20" can only carry a maximum load of 100 kgs (approx) placed on top of it. Any increase of weight will cause the Box to crush and buckle under, the extra weight.

A similar 5 ply corrugated box using exactly the same types of card¬ board of the same qualities and thicknesses and measurements prepared as a Squared Circle Box with a circular or conical- cylinder of 5 Ply corrugated cardboard placed inside will carry a load of 140 Kgs (approx) placed on top of it without any noticeable crushing or buckling. Additionally this invention permits a substantial increase in com¬ pressive load with only a minimal and negligible loss of packing space for the materials stored in the receptacles.

These two factors lead to substantial reductions in costs of materials and substantial increases in efficiency.

(6) The drawing Fig 3 shows a normal cylinder positioned in a rectangular shaped receptacle. The double arrows indicate the radiall transfer of the compressive load.

(7) The compressive load to be carried should be worked out and the dimensions of the inner cylinder and of a square, rectangular or triangular or Polygonal box or receptacle shape calculated and pre¬ pared. A tube or conical cylinder of the same height as the box should be prepared and placed inside the box. The box may then be filled with whatever material required to be packed and the lids closed. The unit is then ready to carry the specified compressive load. The compressive load of the whole may be increased by only increasing the load bearing capacity of the inner cylinder by increasing its strength.

(8) At present corrugated cardboard of other cardboard boxes or receptacles cannot be used to pack powders or granules of loose forms of product Such as processed loose tea, graphite powder etc., bcause the boxes or receptacles, crush or buckle under the compressive load when a number of boxes are packed one on top of each other, which is essen¬ tial for shipping. This invention can be used to pack and stock such boxes or receptacles reducing the thicknesses and strengths of the materials used, to carry the same weight. This new invention and concept is applicable to a very wide range of materials and receptacles and packages and goods. It can be applied to any compressive load bearing application to save space and materials used and costs.

Claims

THE CLAIMS:

I, Daya Ranjit Senanayake of 9, Ecrin place, Colombo 8 do hereby declare the Invention for which I pray that a patent may be granted to me and the method by which it is to be performed is particularly described in and by the statements and drawings given in application DS1/84 dated 5/12/1984 in paragraphs (4) and (5) and (6) and (7) and (8) of the Specification. WHAT I CLAIM IS :-

1) A process and/or method of producing packaging, boxes and other similar devices for packing all forms and kinds of goods in their solid, liquid or gaseous forms with greatly increased compressive strength and load bearing characteristics through the use of a cir¬ cular, conical cylinder, oblong or egg shaped tube or device placed inside a square, rectangular, triangular, Pentagonal, Hexagonal,Poly¬ gonal or similar shaped box or other similar form, either joined to it or loose fitted inside it to increase the strength and load bearing capability of the whole. This inner tube or device may be solid or perforated latticed or honeycombed.

2) A process and/or method according to Claim (1) applied to all mater¬ ials and receptacles used to pack and store goods of all types.

3) A process and/or method according to Claim (1) and Claim (2) used for compressive and load bearing situations in the building constru¬ ction and civil engineering fields and production of Bricks and other building blocks and materials.

4) A process and a method according to Claims 1) , 2) and 3) applied to packaging, building construction and civil engineering and other similar fields to increase compressive strength and load bearing capacity and to save space and materials used. 5) A process and a method according to one of the preceding claims in which Circular, Conical Cylinder, oblong, egg shaped tubes or devices or anything similar made of any material is placed inside a Square, Rectangular, Triangular, Pentagonal, Hexagonal, Polygonal or similar shaped box or other similar form made of any material either joined to it or loose fitted inside it to increase the strength, compressive strength and load bearing capability of the whole and or to save space and materials used and/or to reduce the strengths, thicknesses, quantities and amounts- of the materials used.