FIELD: packing and storage of goods or materials.
SUBSTANCE: invention relates to the field of web separation. Device for controlling separation of sheets of paper webs rolled in the form of a log comprises guide roller. Roller cooperates with means for rolling a paper web so as to form a paper log and cooperating with means for providing pre-incision lines on the paper web so as to divide it in multiple separable sheets. Device comprises pneumatic separation means. Separation means are adapted to direct a fluid jet toward a pre-incision line. Pre-incision line separates the last sheet of a log in the course of formation from the first sheet of a subsequent log to be formed. Pneumatic separation means are located inside the guide roller. Guide roller has an outer surface with a plurality of through holes. Through holes allow the fluid jet produced by the pneumatic separation means to be directed towards the pre-incision lines. Device comprises suction means. Suction means are arranged downstream of the separation means relative to a direction of rotation of the guide roller. Suction means are inside the guide roller. Suction means provoke a suction through the holes. High accuracy of the breaking the paper web is achieved, regardless of the feed rate, reliable guiding of the edge of the sheets.
EFFECT: providing a simple and reliable device for a long operating period.
8 cl, 6 dwg
