AU604298B2 - Profiled sheet for building purposes - Google Patents

Description

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i 60 42 9 8mo COMMONWEALTH OF AUSTRALIA PATENTS ACT 1952.69 COMPLETE SPECIFICATION

(ORIGINAL)

7 Class Int. Class Application Number: Lodged: 12569/88 2.3.1988 Complete Specification Lodged: Accepted: Published: Priority: r r Related Art:

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J~ Name of Applicant: Address of Applicant: S'Actual Inventor: CC C Address for Service Address for Service: PLANNJA AB S-951 88 Lulea, Sweden This document contains the amendments made under Section 49 and is correct for printing ERNST KERO EDWD. WATERS SONS, 50 QUEEN STREET, MELBOURNE, AUSTRALIA, 3000.

Complete Specification for the invention entitled: I c PROFILED SHEET FOR BUILDING PURPOSES The following statement is a full description of this invention, including the best method of performing it known to us

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Profiled Sheet for Building Purposes This invention relates to a profiled sheet for building purposes, especially as roof and facade sheeting, said sheet comprising a normal profiling and in addition, at least in certain sections, a corrugated microprofiling deviating from the normal profiling.

Profiled sheet for building purposes, especially c so-called roof sheeting and facade sheeting, are normally made with some type of profiling for the purpose of giving the S',,tt mostly relatively thin sheet enough stiffness against undesired deformation and in order to prevent penetration of water into c the joint areas and to control outflow of water. Moreover, the sheets are sometimes provided with very deep profiling so that they will qualify for instance to replace certain beams carrying a roof construction. There are a lot of different alternative profiling designs, for example roof sheeting in the market.

i When manufacturing the above-mentioned profiled C C sheet the starting material in the form of for example, a plane band of thin sheet arranged in a roller must be suitable for satisfying certain required criteria, such as material quality and yield strength. Due to said criteria one has so far been reduced to using a relatively expensive starting material for z C manufacture of the profiled sheet.

In order to improve the strength of the profiled sheet it has so far been suggested that a microprofiling further stiffening the sheet and comprising a number of corrugations of a varying appearance is arranged in addition to the normal profiling. Although this has some advantages this microprofiling has an injurious effect on the final width measure of the profiled sheet as it will require more material due to its corrugation resulting in a wider material being 2 required to start with.

It is the object of this invention to provide a profiled sheet, which substantially overcomes or ameliorates the abovementioned disadvantages.

According to one aspect of the present invention there is disclosed a profiled sheet comprising a main profiling having crest, valley and shank sections, and at least in certain sections of the sheet corrugated microprofiles superimposed on the main profiling such that the thickness of the profiled sheet varies in a direction transversely of a longitudinal direction of the microprofiles, each microprofile having respective crest, valley and shank sections 'c characterized in that the thickness of the profiled sheet is c. partially reduced by a pressed-in area in at least one of the c crest, valley and flank sections of at least some of the 3 C c I microprofiles.

Thanks to the invention a considerably greater freedom of choice is offered as far as starting material for the profiled sheet is concerned. Thus, for example, a thin sheet of "unsorted"/varying quality can be used and, if desired, the sheet thickness of the profiled products may also be reduced to some extent. Another advantage of the invention ,C C is that big plane surfaces of the profiled sheet remain plane even when a very thin starting material is used due to a contracting effect exerted by the inventive microprofiling. In Co addition it can be mentioned that the microprofiling of the sheet can be carried out, in connection with and/or after the normal profiling of the sheet. Thus, one has a great freedom of choice as to the working order in the manufacture of the inventive profiled sheet. A microprofiling station comprising rolls made for this purpose can be integrated in a process line for profiled sheet without decreasing the manufacturing capacity of the line.

A very great advantage of the invention is that the reduction of width of the sheet material arising due to the ii--zz~ corrugation of the microprofiling is counteracted and can even be eliminated thanks to the inventive flattened and/or pressed in areas in crest, valley and/or flank sections of the microprofiling. Due to the redistribution of material then taking place a further increase of the material strength is achieved meaning that the reduction of the sheet thickness arising as a consequence of the flattened and/or pressed in area need not have any negative influence on the physical properties of the profiled sheet.

Embodiments of the invention will now be' described with reference to the following enclosed drawings, wherein: Fig. 1 is a perspective view of a section of a sheet provided with a profiling; 0I r Fig. 2 3 are perspective views of sections of profiled sheets formed with corrugated microfiling; Fig. 4 shows a section of an example of the design of the microprofiling on a larger scale; and Figs. 5 12 show sections of a number of examples of the design of the inventive microprofiling on a still larger scale.

Fig. 1 shows an example of a profiled sheet 1 and c one of many possible embodiments of what is called normal profiling 2. As far as profiled sheet for building purposes is cc concerned there is a plurality of embodiments of this so-called normal profiling and, of course, the invention is useful in connection with all possible variations of this so-called Sc normal profiling.

Fig. 2 shows a profiled sheet 3 being provided with microprofiling throughout its normally profiled surface in the i Iform of small waves or corrugations 4 which, thus, extend along all surfaces thereof independently of the configuration of the normal profiling.

Fig. 3 shows an example of a profiled sheet 5 where selected section of the normal profiling are provided with microprofiling 4. In this case the crest 6 and trough 7 o£ the normal profiling are microprofiled while the lateral flanks 8 of the normal profiling do not include microprofiling. Thus, I 4 it will be appreciated that the microprofiling of course can be limited to the surfaces where best needed. Thus, many variations are possible; it can sometimes be sufficient, for example, to provide only the top surfaces 6 of normal profiling with microprofiling.

Fig. 4 shows on a larger scale an example of a microprofiling 4. However, it will be appreciated that the microprofiling can be embodied in other ways not shown here, for example sinusoidal. However, it should consist of a wave pattern of some form lying closely together. In order to detail how it is intended to perform the microprofiling it Soo should be tated that the distance A between two adjacent So°o corresponding parts thereof, for example wave crests 9, should 0000 o oo preferably be less than approximately 15 times the sheet 0 oo thickness T and most preferably be of the order of OO 0 °o °oo approximately 3 to 6 times the sheet thickness T. As a oooooo non-limiting example T 0.6mm, A 3.5mm, H 0.8mm and R can be mentioned.

The inventive profiled sheet varies in thickness in a direction transversely of the longitudinal direction of the Sooo, microprofiling and a number of examples are shown in Figs. 5-12 o000 ooo how this can be achieved. This can be done in the form of oo o flattened and/or pressed-in areas in the crest, valley and/or oooo flank sections of the microprofiling. These flattened and Spressed-in areas are preferably achieved by the tools forming the microprofiling which are also made so that they form the o flattened and pressed-in areas at the same time.

o0 In Fig. 5 a microprofiling is shown where variation of plate thickness has been obtained by the arrangement of flattened areas 10a, 10b on the convex parts on the wave crests and through sections of the microprofiling. These areas extending along the whole length of the microprofiling. It is i" marked in the figure with dashed lines how the appearance of the microprofiling should be if it was lacking the inventive flattened areas reducing the sheet thickness. This marking with dashed lines has also been used in the other figures to show differences in relation to constant sheet thickness.

Fig. 6 shows an embodiment where pressed-in areas lla, llb reducing sheet thickness have been arranged in the concave parts of the crests and troughs of the microprofiling.

Fig. 7 shows an embodiment where pressed-in areas llb only have been arranged on the concave portions of the crests only of the microprofiling which will not effect the appearance of the outside of microprofiling. This can be desirable for aesthetical reasons.

Fig. 8 shows an embodiment where both flattened and pressed-in llb areas are arranged in connection with the microprofiling As shown in Fig. 9 pressed-in areas 12b can also be arranged extending along the flank surfaces of the e f microprofiling 4.

Fig. 10 shows the possibility of arranging pressed-in areas 12a, 12b both on the upper sides and undersides of the flank surfaces.

Fig. 11 exemplifies the possibility of arranging several adjacent pressed-in areas 12b.

In Fig. 12 the possibility is exemplified to use at the same time the flattened crest areas 10a, 10b, the pressed-in valleys lla, lilb and the pressed-in flank areas 12a, a t 12b.

The combination of possibilities are unlimited and the flattened and/or pressed-in areas need of course not be arranged on all microprofiling waves.

Thus, it will be appreciated that the form and number of the flattened and pressed-in areas of course can vary within the scope of the invention.

Generally the flattened and/or pressed-in areas of course extend along the whole length of the profiling. It can be mentioned as a non-limiting example that the thickness of the profiled sheet, as a consequence of the flattened and/or pressed-in areas, for example can be varied between 70% and 100% of the original sheet thickness.

6 As to the embodiment shown in Fig. 2 it is suitable to perform the microprofiling with associated flattened and/or pressed-in areas before the normal profiling is carried out while, if desired, in the embodiment shown in Fig. 3 the microprofiling with associated flattened and/or pressed-in areas also can be carried out simply after the normal profiling has been made.

The invention is not limited to what has been shown and described, but amendments and modifications thereof are possible within the scope of the appended claims.

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Claims (4)

1. A profiled sheet comprising a main profiling having crest, valley and shank sections, and at least in certain sections of the sheet corrugated microprofiles superimposed on the main profiling such that the thickness of the profiled sheet varies in a direction transversely of a longitudinal direction of the microprofiles, each microprofile having respective crest, valley and shank sections characterised in that the thickness of the profiled sheet is partially reduced by a pressed-in area in at least one of the crest, valley and flank sections of at least some of the microprofile. c c

2. A profiled sheet as claimed in Claim 1, cr characterised in that the pressed-in areas extend in the c longitudinal direction of the microprofiles.

3. A profiled sheet as claimed in Claims 1 to 2, characterised in that the pressed-in areas are located on one side of the profiled sheet.

4. A profiled sheet as claimed in Claims 1 or 2, characterised in that the pressed-in areas are located on both sides of the profiled sheet. A profiled sheet being substantially as herein described with reference to any one of Figures 2 to 12. Dated this 31st day of August, 1990. PLANNJA AB WATERMARK PATENT TRADEMARK ATTORNEYS SSUITE 6, FLOOR 16, TOWN HALL HOUSE, 456 KENT STREET, SYDNEY, 2000. L S