Static structures (e.g. – buildings) – Disparate sheet lamina between exposed surfaces of wall,...
Reexamination Certificate
1999-08-19
2001-05-15
Gibson, Jr., Robert W. (Department: 3634)
Static structures (e.g., buildings)
Disparate sheet lamina between exposed surfaces of wall,...
C052S411000, C052S746110
Reexamination Certificate
active
06230461
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the installation of coverings for buildings; in particular, it relates to a novel roof covering.
PRIOR ART
Roof coverings are normally formed using sheets of zinc with butt joints. These zinc coverings have the disadvantage that they expand with heat and become fragile under conditions of severe cold. Moreover, the zinc sheets have to be ventilated from below so as to avoid abnormal ageing. Finally, zinc coverings can only be fastened to timber boards.
DE-A-23362229 and U.S. Pat. No. 5,572,843 disclose roofing systems in which a sealing membrane of synthetic material is spread over the roof, said membrane being secured by means of flat bars or section members of synthetic material. However, these bars or section members do not impart to a roof covered in this way an aesthetic appearance similar to that of a conventional zinc roofing.
SUMMARY OF THE INVENTION
The invention proposes a system for covering a roof, comprising a sealing membrane of synthetic material and a plurality of bars of synthetic material arranged parallel to one another on the surface of the sealing membrane. The latter is mechanically secured to a roofing element and each of the bars comprises a section member in one piece consisting of synthetic material welded to the sealing membrane. The base of each section member is welded to the sealing membrane
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using any suitable process.
In a preferred embodiment each section member is formed with a base and a projecting web surmounted by a portion which has profile of generally triangular shape having a rounded crest.
In addition to making it possible to provide roof coverings which do not have the drawbacks of zinc coverings, the roof covering according to the invention also has the following advantages:
(i) the roofing can be effected more easily and more rapidly than zinc roofings with butt joints;
(ii) large choice for the covering support;
(iii) reduction in the cost of the roofing in relation to a zinc covering with butt joints;
(iv) the appearance of the covering is substantially similar to that of a conventional zinc covering.
The invention will be described in more detail below with reference to the accompanying drawings.
REFERENCES:
patent: 4519172 (1985-05-01), Ristow
patent: 4718211 (1988-01-01), Russell et al.
patent: 5094043 (1992-03-01), Ristow
patent: 5479753 (1996-01-01), Williams
patent: 5572843 (1996-11-01), Jordan
patent: 2336229 (1975-02-01), None
patent: 528519 (1992-06-01), None
patent: 1335470 (1963-08-01), None
Gibson , Jr. Robert W.
Sughrue Mion Zinn Macpeak & Seas, PLLC
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