Abstract: A self-supporting heliothermal flat collector module includes a sheet metal panel; a register-type arrangement of capillary tubes separated from one another for the flow of a fluid medium that lies on the rear side of the sheet metal panel opposite that to be irradiated; and a thermally-insulating insulation core also positioned on the rear side. According to the invention, the capillary tubes of the register-type arrangement are placed into contact with the surface of the thermally-insulating insulation core, and the thermally-insulating insulation core is attached to the sheet metal panel by means of an elastic adhesive layer, whereby the capillary tubes are at least partially embedded into the adhesive layer between the sheet metal panel and the insulation core.

Abstract: The invention relates to the production of protective coatings with a dark color by pickling rolled flat objects, made from titanium zinc, for use in construction. The flat objects are pickled in an aqueous pickling bath containing a mixed acid of sulphuric acid and nitric acid and passivated after rinsing by application of a protective layer. Rolled flat objects such as those made from a titanium zinc alloy are used. The alloy comprises mainly zinc of high purity with additionally a copper content of 1.0 to 2.0 wt. %, a titanium content of 0.06 to 0.2 wt. % and a maximum aluminum contant of 0.015 wt. %.

Abstract: Holding device (100) for a roof drainage gutter (1) with gutter brackets (2.n) matched to the contour of the gutter profile, with each gutter bracket provided with a headpiece (3.n) that, in installed condition, is positioned on the end (13) of the gutter bracket toward the building, and with a securing rail (4.n) with a C- or U-shaped profile into which the headpiece may be inserted and secured. The headpiece (3.1) is inserted into the interior of the securing rail (4.n) and is tensioned between the two C- or U-shaped profile arms (8.1, 8.2) of the C- or U-shaped profile.