Abstract: The invention relates to a device for producing bound written material with representative covers, for marketing texts, magazines, construction plans, collections of drawings, contracts, offers and promotional literature (catalogues) as required in small to medium sizes. A heatable ceramic surface with an integrated heating element has several inductive and thermal sensors on its underside, for detecting covers with a metal inlay and for controlling the heat output. Said inductive sensors are partially also supplemented with sensors with microswitches, optical sensors and additionally, a pressure sensor if the device is to be used for binding covers consisting of non metallic materials at the same time. The very short time for heating up the ceramic heating surface made technically possible by the invention and the use of the stored temperature is made optimal use of through an internal flap system which is motor-operated.

Abstract: The invention relates to a novel book cover which is used together with the known firm bindings, that is U-shaped steel bars. According to the invention, a flexible support material is arranged in two layers and in parallel to the flanks of a U-shaped bar. The layers of the book cover that are in parallel to the flanks are intimately glued together except for a flexible connection of two layers, that is either the support material is flexibly arranged in relation to its two layers or—as shown in FIG. 1—the inner surface of the flank is flexibly arranged in relation to the layer. The resin layer usually fixes the leaves, the resin layer being applied on the transversal insert of the support material. The transversal insert rests against the base of the U-shaped bar, that is it is not firmly linked with it, when the book is closed. When the book is opened, the bound leaves are vertically moved, thereby allowing the leaves to be turned so that they lie flat.