摘要:
The tack of an ink that is used in a printing group of a rotating printing press, or the temperature of a rotating component in the printing group is selected or controlled. This selection or control is accomplished in a manner so that optimal printing is achieved.
摘要:
A printing group of a printing press has two forme cylinders, and two transfer cylinders which are assigned to the two forme cylinders and which, in a print-on position, cooperate to form a printing position. The forme cylinders and the transfer cylinders each have at least one groove or slit on their shell face which groove or slit is adapted to secure ends of a blanket or a dressing. The forme cylinders have circumferences which correspond to a section length of a printed page. Rotating shafts of the forme and transfer cylinders, when in the print-on position, are located in a common plane. The circumferential width of each of the grooves or slits, in the shell faces of the cylinder does not exceed 3 mm.
摘要:
A printing blanket or dressing includes a dimensionally stable carrier plate which has ends that can be secured to a transfer cylinder. A coating is applied to the carrier plate and forms the lateral surface of the transfer cylinder. A recess is located in the printing blanket or dressing intermediate the ends of the blanket or dressing.
摘要:
The contact pressure between an adjustably mounted first cylinder and a second cylinder in a printing machine, and particularly in a web-fed printing machine can be adjusted. An actuator is usable to force the first cylinder toward the second cylinder with an adjustable force. A fixing device is usable to fix the first cylinder in a desired position relative to the second cylinder.
摘要:
A rotary printing press has at least one printing group with at least one waterless planographic printing forme. An inking unit is assigned to the printing group as is provided with a screen roller for use in conveying printing ink to the printing group. The screen roller has line engraving or cross-hatchings, with an angle of inclination or an angle of rise of between 50° and 80° and preferably also has a raster frequency of less than 80 lines or cross hatchings per centimeter on its surface area.
摘要:
A rotary printing press has at least one printing group with at least one waterless planographic printing forme. An inking unit is assigned to the printing group as is provided with a screen roller for use in conveying printing ink to the printing group. The screen roller has line engraving or cross-hatchings, with an angle of inclination or an angle of rise of between 50° and 80° and preferably also has a raster frequency of less than 80 lines or cross hatchings per centimeter on its surface area.
摘要:
Transfer of printing ink is adjusted using a first roller in an inking unit of a printing machine, which transfers ink to a forme cylinder. A temperature control unit enables an outer surface of the first roller to reach a required temperature and/or to enable an outer surface of the forme cylinder to reach the required temperature. That temperature control unit can be either controlled or regulated by an adjusting device. Specific curves or reference points for an interrelationship between a production speed of a printing machine and the respective required temperature on the outer surface of the forme cylinder, or on the outer surface of the first roller are stored in a storage unit of the adjusting device for various printing inks or ink types.
摘要:
The tack of an ink that is used in a printing group of a rotating printing press, or the temperature of a rotating component in the printing group is selected or controlled. This selection or control is accomplished in a manner so that optimal printing is achieved.
摘要:
A rotary printing press is operated using temperature controls. The temperature is set in accordance with a speed at which the printing press is operating. The temperature and speed are set to attain optimum printing results.
摘要:
An adjustment of a transfer of printing ink is accomplished by arranging a first roller in an inker unit and by using that first roller to transfer ink to a forme cylinder. A temperature is adjusted on an outer surface of the first roller by the use of a first temperature control unit which includes an adjuster device. The adjuster device also adjusts a temperature to be set on an outer surface of the forme cylinder by the use of a second temperature control unit. These two temperature control units adjust parameters of the printing ink through the controls of the outer surfaces of their associated first roller and forme cylinders. The parameters of the printing ink which are adjusted are preferably the ink's tackiness and its viscosity.