Abstract: Provided is a offset web press, particularly a variable cutoff type web press, which can reduce costs of replacement of a sleeve for a printing cylinder, which is deteriorated through printing operation. The sleeve for a printing cylinder, which is cylindrical and which is fitted on the outer periphery of a base shaft roll provided on the body side of the printing machine, is composed of an inner peripheral layer having a plurality of layers at least one of which is expandable or contractible with respect to a radial load, and an outer peripheral cylinder closely fitted on the outer peripheral surface of the inner peripheral layer, the inner peripheral layer and the outer peripheral layer being formed separate from each other so as to be separatable from each other.

Abstract: A cover for a damping roller of an offset press is comprising a tubular knitted fabric having two water-shrinkable ground yarns and the hydrophilic pile yarns. The ground yarns are intertwined and respectively form a tubular plain weft-knitted structure in which two ground yarns are alternately knitted so that wales formed by one ground yarn are interposed between two adjacent wales formed by the other ground yarn so that all the wales appear on the face of the fabric. The courses of each plain knitted structure include long sinker loops, the ground yarns being knitted into the respective plain-knitted ground fabric structure to form raised loops. The cover has high shrinking percentages both in radial and axial directions.

Abstract: An antistatic cover is composed of a tubular knitted fabric comprising water-shrinkable or heat-shrinkable ground yarns which are alternately knitted to form a needle loop in a course of a ground fabric so that each sinker loop of the ground fabric has a width longer than that of the needle loop, at least one of the ground yarns comprising charge control fibers or electrically conductive fibers. Pile yarns may be worked into each course of the ground fabric by alternately knitting together with a needle mesh of the ground fabric to form a needle loop. At least one of the ground yarns and pile yarns comprises charge control fibers or conductive fibers.