GB2037695A

GB2037695A - Stack-stabilizing interleaf

Info

Publication number: GB2037695A
Application number: GB7931578A
Authority: GB
Original assignee: CHAPMAN Ltd H W
Current assignee: CHAPMAN Ltd H W
Priority date: 1978-10-11
Filing date: 1979-09-12
Publication date: 1980-07-16

Abstract

A method of stacking cartons or shrink-wrapped trays so as to improve the stability of the stack comprises placing between superimposed cartons 10 an interleaving layer in the form of a board or boards 12, each board 12 having at least one face (14, figure 4, not shown) adapted to provide a high resistance to sliding of a carton 10. The high resistance may be provided by coating the face (14) with sand or a cold seal adhesive, preferably a latex solution. The board 12 may be corrugated cardboard and two such boards may be placed between superimposed cartons 10 with their corrugated faces (13) in interdigitating juxtaposition. <IMAGE>

Description

SPECIFICATION Improved method and means for stacking The invention concerns an improved method and means for stacking, and has more particular reference to a method of and a means for improving the stability of a stack of cartons orthe like.

Relative movement between cartons and the like stacked on pallets often give rise to an instability of such stack.

The object of the invention is to provide a method of and a means for improving the stability of a stack of cartons or the like.

According to the invention a method of arranging cartons and the like in stacked disposition is characterised by the inclusion of a layer of an interleaving material comprising board or the like between some, at least, of the superimposed cartons, the said interleaving material having at least one face having a high resistance to sliding motion of a carton orthe like in contact therewith relative thereto.

According to a preferred feature, the surface having a high resistance to sliding motion comprises a cold seal adhesive.

According to a still further preferred feature, the interleaving material comprises a corrugated board, the cold seal adhesive preferably being provided on the flat face of such board.

In carrying our invention into effect we propose to coat the smooth face of a conventional corrugated board, that is to say corrugated cardboard, with a known cold seal adhesive, and to include a sheet of such board between each successive layer of cartons of a stack thereof.

It has been found that the presence of the board effectively prevents movement of the cartons of one layer relative to those of the next adjacent layer, and will accordingly improve the stability of the stack.

Furthermore, the tendency of the adhesive to prevent movement of a carton relative to the coated surface will assist in holding together cartons of a given layer in closely adjacent disposition, at least at that side of the carton layer in contact with the treated surface of the interleaving material, and will accordingly facilitate the building of a steady stack of cartons.

The interleaving material may be other than corrugated board having a treated surface thereto, since solid cardboard may be similarly treated and used with like effect.

In addition to being of application to the stacking of cartons, the interleaving material may be used with advantage in the context of stacks of shrinkwrapped trays and the like.

The surface of the board will usually be coated with a cold seal adhesive, that is to say an adhesive having an affinity for bonding with a similarly coated surface subject only to the application of a light pressure, such adhesives being commonly used for sealing envelopes, but having a disaffinity for adhesion to other surfaces. However, other high friction surfaces may be utilised, if preferred, although surfaces coated with, say, particulate material may well be precluded on the grounds of cost.

It is desirable that the high resistance face or faces of the interleaving material of the invention should not be such as to cause contamination or clogging of the carton or the like in contact therewith and this can be particularly well achieved with a cold seal adhesive as mentioned above.

A suitable cold seal adhesive for use in conjunction with the above described interleaving board is a latex solution, and one embodiment of stacking method according to the present invention will now be described with reference to the accompanying drawings in which: Figure 1 is a perspective view of a stack of cartons, stacked in accordance with the method of the invention; Figure2 is a perspective plan view of an interleaving board; Figure 3 is a perspective underplan view of the board of Figure 2; and Figure 4 illustrates two of the boards of Figures 2 and 3 in interdigitating juxtaposition.

Referring now to Figure 1 there is shown cartons 10 stacked on a pallet 11 so that they can conveniently be transported by means of a fork-lift truck (not shown). Between any cartons 10 and the carton stacked immediately on top thereof are a pair of corrugated boards 12, each having a corrugated face 13 and a smooth face 14, as shown in Figures 2 and 3 and the boards 12 having their corrugated faces 13 in interdigitating juxtaposition as shown in Figure 4.

The smooth face 14 of each board 12 is coated with a latex solution or other cold seal adhesive and preferably the face of the carton with which the board is in contact in use is also coated, at least in part, with a similar adhesive. In this way the board 12 will adhere to the face of the carton 10 but may be easily removed therefrom when required. Cartons 10 stacked on top of one another with boards 12 located therebetween will move easily relative to each other until the corrugations are in interdigitating juxtaposition as shown in Figure 4 but then further relative sliding movement will be resisted. In consequence the stability of a stack of such cartons will be improved.

Obviously alternative arrangements may be used which are within the scope of the claims and which will be readily apparent to a person skilled in the art.

For example instead of corrugated board, a board having a dimpled surface or a very rough, sandpaper like surface may be used. In any case a single sheet may be used instead of the two interleaving sheets as described herein, and the single sheet may have corrugations, dimples or sandpaper like particles on one or both faces as desired, or particularly if the surfaces are flat and smooth the cold seal adhesive may be applied to both surfaces.

A further advantage of the present invention lies in the fact that the presence of the interleaving board increases the stability of the stack to an extent that the invention may be used with a stack of packages formed with shrink wrapping film, thus creating a considerable cost saving in comparison with the use of cartons or cases formed of corrugated board or the like.

Claims

1. A method of arranging cartons and the like in stacked disposition characterized in that a layer of an interleaving material comprising board or the like between some at least of the superimposed cartons, the said interleaving material having at least one face adapted to provide a high resistance to sliding motion of a carton or the like in contacttherewith relative thereto.

2. A method according to claim 1 wherein said one face is coated with a cold seal adhesive.

3. A method according to claim 2 wherein the adhesive comprises a latex solution.

4. A method according to any preceding claim wherein said interleaving material comprises corrugated board.

5. A method according to claim 4wherein a cold seal adhesive is applied to the flat surface of said board.

6. A method according to claim 5 wherein two such boards are interleaved between superimposed cartons with said corrugations in interdigitating juxtaposition.

7. A method substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.

8. A stack of cartons or the like arranged in accordance with the method as claimed in any preceding claim.