Abstract: Printing apparatus comprising a plate carrying impression cylinder and a flexible printing plate detachably securable thereon. Because the printing plate may be large and flexible, special apparatus is provided for positioning the plate on the cylinder and removing it therefrom, comprising a suction head carried by an endless member for reciprocal movement between the cylinder and a storage cylinder on which the flexible plate can be wound.

Abstract: The invention relates to a bookbinding process in which each page is glued by its dorsal edge, characterized by the fact that a coating consistent with the used binding glue is deposited, before folding and cutting of the signatures, along one or more areas located on both sides of the folding lines of the paper sheet for forming said signatures, that after folding and assembling several signatures the dorsal part thereof is trimmed in such a manner that the coated area emerges on the dorsal edge of the pages, and that the thus obtained assembly of pages is glued by means of an appropriate binding glue, as well as to the binding obtained by this process in which the faces of the pages comprise in a zone next to the dorsal edge thereof a layer of a coating which easily binds itself with the binding glue used.