摘要:
Assembly for influencing inking in printing machines including a color density measuring device, a device for comparing nominal values and actual measured values, at least one electronic computer for linking the measured values with adjustment values, devices for metering ink feed zonewise to a printing plate and having ink metering elements with appertaining adjustment members and feed-back or reply devices, including a plurality of displays assigned to the ink metering elements for representing adjustment values of all ink zone adjustment members, respectively, of a printing unit, said displays providing exact recommendations to an operator of the assembly, before adjustment of the inking zone adjustment members, for adjusting the adjustment members to predetermined positioning nominal values and signaling to the operator absolute adjustment travel thereof both in magnitude and direction and a positioning device having means selective by the operator for following up the ink zone adjustment members individually and of at least one printing unit, respectively, the positioning device being coupled with the displays.
摘要:
A control system for a printing press includes inputting into a central control apparatus to which a plurality of printing presses are connected data required for controlling a given printing press for a given printing job, and transmitting the data from the central control apparatus to a control device assigned to the given printing press.
摘要:
A device for coupling additional equipment to a machine having a control system with inputs and outputs for controlling the machine. The device includes connecting lines connecting the control system and the additional equipment, with the connecting lines coming together at a central connection site. The device can be located at the central connection site for metallically isolating all of the inputs and outputs of the control system from all of the inputs and outputs of the additional equipment.
摘要:
Data entry and display apparatus for a printing machine having a plurality of control elements having actual and desired position values for controlling machine variables which include ink and dampening fluid density and register positions, the control apparatus includes a control panel having a plurality of optical first elements for displaying and controlling at least one of the machine variables; a light pen having a contact point which includes a second optical element for operatively, optically engaging the first optical elements; timing means operatively engaging the first and second optical element for timingly coordinating the position of the contact point in spaced relationship with the first optical elements for entering nominal position values for at least one of the control elements into the control apparatus.
摘要:
A filter device on electrical switch cabinets, housings for electronic systems and like equipment to be maintained free of dust and impurities while being ventilated during operation includes a labyrinth filter disposed in a travel path of ventilating air upstream of an air intake opening of the equipment to be ventilated, the labyrinth filter having means for effecting a plurality of changes in direction of flow of the ventilating air therethrough so as to function in a manner similar to that of a mechanical labyrinth seal.
摘要:
A method for regulating inking of a printing press. The method includes a first step of providing a picture taking device, a closed-loop control device, and a printed product having a surface with a printed image. A second step of printing a print control strip on the surface next to the printed image. A third step of deriving first picture signals from the print control strip and deriving second picture signals from the printed image with the picture taking device. A fourth step of using the closed-loop control device for deriving actual values representing inking of the print control strip from the first picture signals and comparing the actual values to desired values for deriving resultant comparison values. A fifth step of determining ink adjusting signals for controlling ink distribution devices from the resultant comparison values for varying inking of the print product until a desired value is reached during a printer tuning phase. A sixth step of generating an OK signal when the desired value is reached. A seventh step of using the closed-loop control device for deriving further actual values representing inking of the printed image from the second picture signals and comparing the further actual values to further desired values for creating further resultant comparison values. Lastly, one determines further ink adjusting signals for controlling the ink distribution devices from the further resultant comparison values for varying inking of the printed product.
摘要:
A method of determining printing-ink consumption in an offset printing press includes feeding printing ink to an inking unit of a printing press via an ink duct having adjustable ink-gap openings, and via an ink-duct roller which absorbs the ink emerging from the ink-gap openings; determining ink-film thicknesses (s.sub.F) from the ink-gap openings, and ink-strip length (l.sub.F) and ink-strip width (b.sub.F) per unit time from the rotational speed of the ink-duct roller, and calculating therewith the quantity of printing ink supplied per unit time of per number of printed products in accordance with the equationM.sub.F =K.times.s.sub.F .times.l.sub.F .times.b.sub.F .times.fwherein K represents a constant specific to the printing-press and f represents both a function specific to an adjustment of the press and also a function specific to the material, and displaying the determined ink consumption.
摘要:
A measuring and/or color matching table having a sheet support surface, including a device for assessing printing quality of a printed sheet deposited on the sheet support surface, and a lighting fixture disposed above and spaced from the sheet support surface, the table having a front side from which the device is operable by an operator, a front part of the sheet supported surface facing towards the operator at the front side of the table and being inclined upwardly at an obtuse angle to a rear part of the sheet support surface.
摘要:
Device for cleaning at least one of a plate and a blanket cylinder of an offset printing machine, includes a plurality of cleaning elements disposed adjacent one another in a direction parallel to a cylindrical peripheral surface of at least one of a plate and a blanket cylinder; a driving device for positioning each of the cleaning elements towards and away from the at least one cylinder; and an input and control device for actuating a respective cleaning element; and method of operating the device.