Abstract: An induction hob includes: a cover plate having at least one cooking area; a holding plate arranged parallel to the cover plate; at least one inductive heating coil arranged in an intermediate space between the cover plate and the holding plate; at least one electronics housing having electronics for the heating coil, which at least one electronics housing is arranged on a side of the holding plate facing away from the heating coil; a lower casing that delimits the induction hob at a bottom thereof; and at least one fan by which a cooling air flow for cooling the electronics is generatable in the lower casing. The at least one electronics housing is arranged in the lower casing, which is open at a top thereof, the holding plate covering the lower casing in an essentially airtight manner.

Abstract: The invention relates to a device and a method for producing and/or transforming a web of fibrous material, in particular a paper or cardboard web. Said device includes a heatable and rotatable cylinder, in particular a drying cylinder of a drying section, and a cylinder sleeve which can be impinged from the inside by a heating fluid. In order to improve the heating power below the external surface of the cylinder sleeve, at least one channel is provided in order to guide the heating fluid.

Abstract: In heat-setting mixtures of a polyisocyanate with a polyol which have a long shelf life at room temperature, the polyisocyanate is present, in the form of discrete particles, in the polyol, and the polyisocyanate particles are deactivated at their surface. From 0.01 to 0.499 equivalent percent of the total amount of isocyanate groups present is deactivated by a primary or secondary amine or water, or from 0.01 to 20 equivalent percent of the said isocyanate groups is deactivated with a compound containing carboxyl, phenolic hydroxyl, amide or hydrazide groups.These mixtures are useful as coating compositions, adhesives and sealant materials, particularly as undersealants for motor vehicles.