Abstract: An improved paper guide device is disposed close to folding rollers in a folding machine of a rotary press as spaced from an outer circumference of a folding drum. During normal operation, the paper guide device is preset to allow for minute movement of the folding rollers during the folding operation. But when the folding rollers clog with paper and move apart beyond a predetermined distance, the paper guide device moves as interlocked with the folding rollers. Therefore, paper guides of the paper guide device never contact the folding rollers. Preferably, the position of the paper guides relative to the folding rollers can be changed such that the widths of the respective gaps between the paper guides and the folding rollers can be adjusted.

Abstract: In a known folding drum of a folding machine for use with a rotary press, a web to be cut on the folding drum is guided and held by a plurality of parallel bands aligned in the axial direction of the folding drum and spanning a gap of the folding drum. Tips of a folding blade project to the outside of the folding drum through the gaps between the respective bands. In the present invention, at least two bands are integrally connected by a respective band mount portion with a plurality of groups of such integrally connected bands being provided. Each band mount portion is mounted to the folding drum via respective adjusting devices such that the expansion of the bands of each group thereof in the circumferential direction of the folding drum can be adjusted. Preferably, each adjusting device includes an adjusting plate engaged with an adjusting rack to which the bands are mounted, and an adjusting shaft.

Abstract: A folding machine of a rotary press is of the type that after superposed paper sheets have been cut out by means of a folding drum and a cutting drum, a folding blade is projected from the folding drum to insert the cut paper sheets between a pair of folding rollers for folding. A gap adjusting device for the folding rollers is composed of a pair of support arms for the folding rollers which are swingable about a pair of fixed shafts. Vertically movable adjusting tables are disposed under the respective support arms and a pair of links connect the adjusting tables with the respective support arms. In a variation a pair of arms pivotably supporting the folding rollers are coupled via a pair of adjusting levers pivotably supported from a single support shaft disposed under a middle portion of the support shafts of the arms and links.