Abstract: A printing cylinder holding apparatus for a printing machine, includes a pair of bearing holding members arranged on one of a pair of frames which rotatably support a printing cylinder via a pair of bearing members, respectively. One of the frames has a first opening for allowing a cylindrical printing member to be put on and out of the printing cylinder. The bearing holding members are movable between a holding position wherein the bearing holding members hold one of the bearing members and an unholding position wherein the bearing holding members release the one of the bearing members to form a second opening which is associated with the first opening for allowing the cylindrical printing member to be put in and out of the printing cylinder.

Abstract: A printing plate mounting apparatus is disclosed, which comprises a de-mounting and a mounting lever provided on an end of a lock shaft provided in a printing cylinder and printing plate replacement drive means including air cylinders or the like. With the printing cylinder held at a predetermined position, the drive means pushes each lever to rotate the lock shaft. In this way, the rotational driving of the lock shaft and coupling and de-coupling of the driving are effected collectively. A printing plate replacement apparatus is also disclosed, which comprises roller drive means including a roller and a cylinder or the like. When mounting a printing plate, the roller is urged against the printing cylinder via the printing plate. Otherwise, the roller is retreated by the roller drive means.

Abstract: A printing plate mounting apparatus is disclosed, which comprises a de-mounting and a mounting lever provided on an end of a lock shaft provided in a printing cylinder and printing plate replacement drive means including air cylinders or the like. With the printing cylinder held at a predetermined position, the drive means pushes each lever to rotate the lock shaft. In this way, the rotational driving of the lock shaft and coupling and de-coupling of the driving are effected collectively. A printing plate replacement apparatus is also disclosed, which comprises roller drive means including a roller and a cylinder or the like. When mounting a printing plate, the roller is urged against the printing cylinder via the printing plate. Otherwise, the roller is retreated by the roller drive means.

Abstract: An attachment is mounted and dismounted onto and from a spindle head or ram of a machine tool having a rotatable spindle by apparatus comprising a collet including a plurality of circumferentially arranged flexible members extending in parallel with the spindle from a surface on which the attachment is to be mounted, and provided with enlarged heads; a clamping rod having an opening facing the surface, a small inner diameter projection formed on the inner surface of the opening, and a large inner diameter portion adapted to receive the heads; a piston-cylinder assembly for reciprocating the clamping rod toward and away from the collet; and a release piston reciprocated in the clamping rod for radially expanding the enlarged heads of the collet.