摘要:
A gas collection device of a printing press includes an organic compound treatment system (33) including a gas chamber (34). The device includes a cover (3) configured to cover a print unit (2) of a printing press. The device includes a gas transfer device (4) configured to suck a gas of a volatile organic compound produced in the print unit (2) from the inside of the cover 3 and transfer the gas to the gas chamber (34). It is possible to provide a gas collection device of a printing press, which can prevent a work environment in which the printing press is installed from being deteriorated by the gas of the volatile organic compound.
摘要:
This invention discloses a numbering and imprinting machine including a number cylinder (14,15), drive motor (507), brush member (201), brush member drive device (508), phase detection device (503), and control device (501). The number cylinder includes a plurality of numbering devices (50). The drive motor (507) rotates the number cylinder (14,15). The brush member (201) is supported movably and moves in contact with the number cylinder to clean the plurality of numbering devices (50). The brush member drive device (508) moves the brush member. The phase detection device (503) detects the rotary phase of the number cylinder. The control device (501) controls the drive motor (507), based on the detection result obtained by the phase detection device (503), so as to stop the number cylinder (14,15) while the brush member (201) is in contact with one of the plurality of numbering devices (50) which form one of the plurality of numbering device lines (50d,50e) and controls the brush member drive device (508) to move the brush member (201) in contact with the plurality of numbering device lines (50d,50e).
摘要:
The machine has printing units (10), and each unit has an impression cylinder (11), rubber cylinders (12) and a form cylinder (13). A correction parameter overlies a position actual value (20) of the respective rubber cylinders for ensuring image error corrections in multi color printing at each printing unit, which takes part in the multicolor printing for the formation of a position desired value for the cylinder (13). The correction parameter is determined based on an overlapping function, whose input parameter is the actual value of the cylinder (12). An independent claim is also included for a method for operating the printing machine e.g. sheet fed printing machine.
摘要:
This invention discloses a numbering and imprinting machine including a number cylinder, moving inker, first cleaning device, second cleaning device, inker position detector, and control device. The number cylinder includes at least one numbering device. The moving inker includes a number inker which supplies ink onto the number cylinder, and is movable between a printing position at which the number inker comes into contact with the number cylinder, and a retraction position at which the number inker separates from the number cylinder. The first cleaning device cleans the number cylinder. The second cleaning device cleans the number inker. The inker position detector detects the position of the moving inker. When the inker position detector detects that the moving inker is set at the printing position, the control device rotates the number cylinder, drives the number inker and controls cleaning operations by the first cleaning device and the second cleaning device.
摘要:
In a method for setting a contact position of a printing roller with a central drum and an anilox roller with the printing roller in machines for flexographic printing, in which the printing roller and the anilox roller are activated in translation by at least an electric motor along a nearing/distancing direction between a no-contact position and a contact position and a contact position with the drum, respectively with the roller associated thereto, supply of an electric current to the electric motor (30,40) is commanded in accordance with a reference value, corresponding to a value of the current which value is just sufficient to cause translation of the roller along said nearing/distancing direction (D), to which a determined angular velocity of the electric motor corresponds. An encoder is then used to detect a lag between said angular velocity and the actual angular velocity, which sharply decreases at a moment of contact between the rollers. The electric motor is then halted and the encoder is used to measure an exact linear distance travelled by the roller up to the halting of the electric motor.
摘要:
A printing press comprising at least one exchangeable cylinder (10, 12) that is rotatably supported in a machine frame, a movable bearing member (18) froming part of a bearing (44) for the exchangeable cylinder (12), and a sensor head (26, 28, 30) that is capable of receiving signals from a signalling device (22, 24, 32) that is mounted on one of the cylinders (10, 12) of the printing press, characterised in that the sensor head (26, 28, 30) is mounted on the movable bearing member (18) and is arranged to receive the signals from a signalling device (22, 24, 32) at least when the bearing member (18) is in a predetermined position.
摘要:
The ink-agitator (1) is supported and guided by fixed means between pedestals (2) and (3) above an ink fountain containing security ink. It is driven in alternate movement on its guiding means and its tip is dipping into the ink. Bore (11) receives a detector head in the form of a transformer with primary winding arranged for normally producing a 'zero' magnetic field, adjustable ferrite core place in such a manner that the 'zero' magnetic field is obtained for a standard magnetic property of the security ink, and secondary winding going out of balance and issuing a signal if the magnetic property of the ink into which the tip of the ink-agitator is displaced undergoes modifications. The output signal is transmitted to feed line (4) with slide contact (6) whereas the ground pole is connected through wire (5) and sliding contact (7).