Method for producing printed products consisting of at least three sub-products

A method for producing printed products, which consist of at least three multiple-sheet sub-products which lie on one another and are connected to one another, in which method, in the case of a material web which is printed in a digital printing station, is moved in an advancing direction and has at least three printed material web sections which are arranged next one another in the longitudinal direction thereof, a first material web part which is formed by at least one material web section is collated in a first step with the remaining material web part which is formed from at least one other material web section, and the two material web parts are connected to one another by means of an adhesive in the region of a connecting line which runs in the longitudinal direction of the material web and between two adjacent material web sections, wherein in a following second step, the material web is folded once or multiple times along in each case one line which is parallel to the advancing direction of the material web and runs between two adjacent material web sections, in such a way that all material web sections come to lie above one another, in that, subsequently, multiple-sheet sub-products, the sheets of which are connected to one another in the region of the spine of the respective sub-products, are separated from the material web by way of cutting transversely with respect to the advancing direction of said material web, and in that the sub-products are placed on one another in order to form a stack, the stacked sub-products being connected to one another by means of an adhesive which is applied, before or during the placing of the sub-products on one another, to the upper side or underside of the sub-products in a manner which is adjacent to the side edges which lie in the spine of a sub-product.