摘要:
A printed paper web or any required number of such web in superposition are cut into sections at the folding station of a rotary printing press. Each web section has its midpart subsequently pushed into one of the jaw cavities in a jaw cylinder, therein to be engaged and folded by a fixed and a movable jaw. Both jaws are mounted to separate, independently movable parts of the jaw cylinder, to which is coupled a jaw spacing adjustment mechanism for moving the jaws toward and away from each other in order to vary the spacing therebetween in any operating phase of the movable jaw relative to the fixed jaw. In order to adjust the jaw spacing to the running speed of the press, as well as to the number of webs being processed jointly, a jaw spacing adjustment circuit is provided which puts out a signal indicative of a desired jaw spacing suiting both the press speed and the web thickness, for delivery to a stepper motor driving the jaw spacing adjustment mechanism.
摘要:
A printing-cylinder bearing device for rotatably supporting a printing cylinder 12 via a frame 6 in such a manner that the printing cylinder can be moved between a printing position and a non-printing position, comprising a radial-load supporting means 3 having between the frame 6 and a shaft 2 of the printing cylinder 12 at least an eccentric part that is rotatable around the centerline of a hole 13 provided on the frame 6, a housing 5 interlocked with the eccentric part and provided in such a manner as to inhibit the axial movement of the printing cylinder 12 with respect to the frame 6, a thrust loading supporting means 4 interposed between the housing 5 and the shaft 2 of the printing cylinder 12, and an eccentric part rotating means 8 for rotating the eccentric part around the centerline of the hole 13 on the frame 6 and holding the rotated position of the eccentric part.
摘要:
A blanket cylinder used in offset lithography includes a cylinder body, a retainer spindle and a resilient member. The cylinder body has an undercut groove with a first undercut longitudinal edge for engaging a first flange of a carrier sheet and a second undercut longitudinal edge for temporarily engaging a rim of the carrier sheet. The retainer spindle is received in the undercut groove for bi-directional rotation. The retainer spindle includes a pull-in hook that engages the rim of the carrier sheet to pull a second end portion thereof into the undercut groove with rotation of the retainer spindle in a first direction and a push-out ledge abuts against the rim of the carrier sheet in order to push a second end portion thereof out of the undercut groove with rotation of the retainer spindle in a second direction. The resilient member energizes the retainer spindle in the first direction.
摘要:
A groove for receiving opposite end edges of an object, like a printing plate that extends around a printing cylinder, is formed in a printing cylinder adjacent the outer circumferential surface thereof to extend from an axially extending anchor-shaft hole to the outer circumferential surface of the cylinder body. One wall surface of the groove intersects, at an acute angle, a tangent plane passing through a line of intersection between the wall surface and the outer circumferential surface of the printing cylinder, thereby forming an edge together with the circumferential surface of the printing cylinder. When an anchor shaft inserted into the anchor-shaft hole is rotated by means of elastic force, pins studded into a cutaway surface of the anchor-shaft enter anchor holes formed in an end edge portion of the object and secure the end edge portion within the groove. Thus, the object is attached to the printing cylinder.
摘要:
Upon replenishing cleaning members 10 of a plurality of sets of cleaning means 1 of a cleaning apparatus with a cleaning solution, those sets of cleaning means 1 having the cleaning members 10 to be replenished, respectively, are fed with the cleaning solution from a cleaning solution supply source part 21 communicated with the plurality of sets of cleaning means 1 through supplying conduits 23 via supply branching part 22. The cleaning solution as fed out reaches the supply branching part through the supply pipe, and fed out from the supply branching part in a manner branched into the supplying conduits branched to feeding destinations, respectively, to thereby reach the plurality of cleaning members to be replenished. In this way, upon replenishing a plurality of cleaning members of a bearer cleaning apparatus with a cleaning solution, it becomes possible to replenish the plurality of cleaning members with the cleaning solution from a single location in an extremely simple manner.