Static structures (e.g. – buildings) – Lapped multiplanar surfacing; e.g. – shingle type – Interfitted sections
Reexamination Certificate
2000-03-27
2001-08-07
Chilcot, Richard (Department: 3635)
Static structures (e.g., buildings)
Lapped multiplanar surfacing; e.g., shingle type
Interfitted sections
C052S748100
Reexamination Certificate
active
06269604
ABSTRACT:
TECHNICAL FIELD
The present invention relates to roof cladding, and more specifically to roof cladding elements which are profiled in their longitudinal direction and stepped in their transverse direction.
BACKGROUND ART
In the nineties, the applicant has been marketing a roof cladding system under the trademark LindabTopline® which includes roof cladding elements of sheet metal of the type mentioned above. The LindabTopline® system is described in two Danish-language pamphlets “Gi′ dit hus en ny profil . . . ” and “Vejledning—projektering og montage” issued by Lindab Profil A/S in 1994, as well as in the German-language pamphlet “Lindab Dachpfannen” issued by Lindab VM GmbH. These known roof cladding elements are profiled in their longitudinal direction and thus have a wave-shaped cross-section. Further, the elements are stepped in their transverse direction for forming tile-like formations similar to traditional roof tiles of clay. The roof cladding elements are produced in roll-forming machines, for instance of the type described in a pamphlet “Integrated Sheet Metal Technology” issued by the Finnish company Samesor Oy.
Normally, the elements are delivered in lengths of several metres, so-called full length plates which require two people in mounting on the roof. Lately, however, there has been an increasing demand for shorter roof cladding elements of this type, so-called panels having a length of about 1-2 m which can be mounted by a single person. Such short roof cladding panels have several advantages: they can be stored in standard lengths, they can easily be placed on a small trailer for transport and they can easily be mounted on the roof by one person.
Short roof cladding panels of this principal type are disclosed in the Danish Utility Model Publication DK-U-96 00008 corresponding to the German Utility Model Publication DE-U-297 00 208. The rectangular panels shown in these publications have longitudinal waves or undulations and are stepped in the transverse direction for forming tile-like formations. Further, the upper and lower edge portions of the panel are cut generally wave-shaped.
However, the known roof cladding elements (plates and panels) sometimes suffer from some common disadvantages. When elements are used which do not extend over the full length of the roof, specific overlap problems occur. These problems are particularly noticeable when the roof cladding is built up from several short panels, in which case a plurality of four-corner joints are present on the roof. Since the panels are mounted in an overlapping manner, these four-corner joints include the corner portions of four adjacent panels. Due to the four-corner joints having four layers of sheet metal, there is a build-up in height throughout the roof cladding which makes it hard to mount the panels in a straight horizontal direction. Further, of course, the four-corner joints having four layers create the same problem in the longitudinal direction of the roof cladding.
Another disadvantage is that the person who mounts the roof cladding elements does not know where to put the fastening screws on the elements for attachment to the underlying supporting structure of the roof. The supporting structure is simply hidden by the panels.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an improved roof cladding element, by means of which the above-mentioned disadvantages can be remedied. A particular object of the invention is to simplify and improve the mounting of the roof cladding elements.
These and other objects, which will appear from the following description, have now been achieved by a roof cladding element having the features defined in appended claim
1
, preferred embodiments thereof being set forth in the subclaims
2
-
12
. The objects of the invention are also achieved by a roof cladding system and the use of roof cladding elements in accordance with appended claims
13
and
14
, respectively.
The roof cladding element of the invention is characterised in that two diagonally opposite corners thereof are obliquely cut. An upper cut corner portion of one roof cladding element is adapted to be matchingly assembled with a lower cut corner portion of another cladding element roof in a four-corner joint including also non-cut corner portions of a third and a fourth roof cladding element.
The invention confers several advantages. Since the four-corner joints only have two layers of material along the connection where the cut corner portions are put together, the former overlap inconvenience is avoided. In the area immediately adjoining said connection between the cut corner portions, there are only three layers of material. Further, the mounting of the roof cladding is simplified.
REFERENCES:
patent: 1816439 (1931-07-01), Masters
patent: 2076989 (1937-04-01), Halpham
patent: 4262462 (1981-04-01), Melbye
patent: 1148058 (1963-05-01), None
patent: 29700208 (1997-04-01), None
patent: 297 00 208 U1 (1997-04-01), None
patent: 2460378 (1981-02-01), None
patent: 11247 (1916-01-01), None
patent: 203132 (1923-09-01), None
patent: 430933 (1935-06-01), None
Keasbey & Mattison Product Brochure, Jun. 1952, pp. 25-26.*
Gi'dit hus en ny profil, Danish Lindab brochure, 1994.
Vejledning -projectering og montage, Danish Lindab brochure, 1994.
Lindab Dachpfannen, German Lindab brochure, 1994.
Montering of bølgepladetage, Dansk Eternit brochure, Aug. 1998.
Integrated Sheet Metal Technology, Samesor Oy brochure, early 1990's.
Chilcot Richard
Lindab A/S
Weingarten, Schurgin Gagnebin & Hayes LLP
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