摘要:
A printing unit (1) comprises a first roller (2) and a second roller (3) provided substantially parallel and facing with each other for transport of printing sheets between the first roller (2) and the second roller (3). The first roller (2) is rotationally mounted at only one end (10) of the first roller (2) and wherein this one end (10) is mounted to a deflector (9). The deflector (9) comprises a connection (11) to a support (12) for resiliently changing the angle of the first roller (2) relatively to the second roller (3) by bending the connection (11).
摘要:
The method comprises: a) linearly moving a printing roll (2) or an inking roll (3) towards a central, counterpressure roll (1), causing said rolls to rotate, actively or passively, and monitoring the torque thereof; b) detecting a significant change in the value of said torque as compared with the mean torque value, in correspondence with a first point of contact between the rolls; and c) continuing said linear movement towards the central, counterpressure roll (1), monitoring the increase in torque until there is a significant variation in the increase in the mean torque value, which is taken to be indicative of an optimum level of pressure (J2). The printing press is designed in order to implement said method.
摘要:
A transport device (10) for transporting printed products is provided including a first (12) and a second tape (14) for receiving and transporting the printed products (60, 62), a first (20) and second roller (21) for guiding the tapes (12, 14), a nip-adjusting device(30) adjusting a nip (70) formed by the first (12) and second tapes (14) at the first (20) and second rollers (21) and a sensor (80) determining a thickness of the printed products (60, 62), the nip adjusting device (30) being actuated as a function of the sensor (80). A method is also provided.
摘要:
A method for controlling a print-to-cut register in a shaftless web printing press having a first print unit (10) having a first plate cylinder (18) and first blanket cylinder (16) for printing a web (3), at least one independent drive (90) for the first print unit (10), and a folder (6) having a cross cutter (80) for cutting the web (3). The method includes printing the web using the first plate cylinder (18) and first blanket cylinder (16) so as to form at least one printed section of the web; sensing the print-to-cut register of the at least one printed section; and controlling the print-to-cut register of the first plate cylinder (18) during printing via the independent drive (90) as a function of the sensing. The controlling includes pulling the first plate cylinder off impression and phasing the first plate cylinder (18) with respect to the cross cutter (80) using the independent drive (90). A method for controlling circumferential register and a printing press is also disclosed.
摘要:
A tax stamp perforator and notcher (10) applies a diagonal line of spaced apart perforations (14) on a tax stamp (12) for subsequent application to a cigarette pack (24). The stamp is glued or otherwise applied to the cigarette pack normally across the back of the pack and one of the sides thereof. When the cigarette pack is opened the tax stamp is torn along the lines of perforations. In order to facilitate rapid application of tax stamps to a production line of cigarette packs, notches in the form of lines of increased densification (16) are applied to each stamp in the area where the stamp is bent around the side of the cigarette pack. These lines of increased densification are arranged parallel to the edge of the cigarette pack, and preferably one of the lines lies along the edge of the cigarette pack to thereby reduce the ability of the tax stamp to spring back away from the pack when glued to the pack. This feature enables the stamps to be applied to the packs at high production rates.
摘要:
According to the invention, four rubber cylinders (16-19) can be placed on a satellite cylinder (22) in a first production mode and two rubber cylinders (18, 19) can be respectively placed on a first (22) and a second (21) satellite cylinder in a second production mode in a printing unit of an offset printing machine.
摘要:
According to the invention, four rubber cylinders can be placed on a satellite cylinder in a first production mode and two rubber cylinders can be respectively placed on a first and a second satellite cylinder in a second production mode in a printing unit of an offset printing machine.
摘要:
The invention relates to a driving mechanism for a cylinder of a rotary printing machine. According to the invention, the rotary axis (23) of a driving pinion (18) lies approximately on a straight line (22) defined by a rotary axis (08) of the cylinder and a swivelling axis (09) of an eccentric bush (04).