摘要:
In a method to produce a printing form for rotogravure, in particular for heliorotogravure, a surface of the formis provided with a wear-resistant layer and the surface is provided with cups. Furthermore, a printing form is provided whereby the surface of the printing form comprises a wear-resistant layer in which the cups, with regard to their depth, are at least partially provided therein. The printing form may be used in a printing device for heliorotogravure.
摘要:
An orifice for coupling a highly-evacuated electron beam gun to a rotating print form cylinder for engraving is provided such that the gun has a rigid cover with an opening for the electron beam at its end facing the print form cylinder and a flexible band is arranged at the cover which partially surrounds the print form cylinder. The band is pivoted at the cover and at least one of the pivot points is elastically designed and pivoting occurs with the aid of springs which are adjustable with respect to the spring force.
摘要:
In a method for operating an engraving member in an electronic engraving machine to engrave printing forms, especially printing cylinders for intaglio printing, a stylus of the engraving member is controlled by an engraving signal and engraves a sequence of cups arranged in a gravure screen in the rotating printing cylinder. The engraving signal is formed by superimposing the image signal representing the tone gradations to be engraved. In order to obtain good quality engraving, the engraving member is heated to a temperature that is close to operating temperature before engraving starts and/or during an interruption of engraving. For this purpose, the engraving member is driven with a periodic signal whose frequency is preferably located inside the ultrasonic range in order to avoid noise disturbances.
摘要:
Lenses are brought individually or in pairs on a transport device (12) to a continuous vacuum apparatus (1) equipped with a rotating substrate carrier (3). The eyeglass lenses (13) are introduced through a system of locks (15) into the continuous vacuum apparatus (1), where they are coated in at least one controllable coating station (5, 6, 7) with at least one transparent layer and then sent back to the transport device (12). The eyeglass lenses (13) are given codes (18), and the codes are read by a code reader (19). The coating parameters of the individual coating stations (5, 6, 7) and the drive of the substrate carrier (3) are controlled by the code reader (19).
摘要:
The invention relates to an arrangement for the production of a plasma as well as for applying charged and uncharged particles onto a substrate. Two areal electrodes connected to a voltage source are provided between which a plasma volume excited by high-frequency energy is ignited. The areal ratio of the two electrodes is variable in order to influence the energy of the ions impinging on a substrate. Furthermore, supplying of process gas distributed over the entire substrate area is possible.
摘要:
In a method and an apparatus for coating a substrate (26) with electrically nonconductive coatings from an electrically conductive target (25) in a reactive (e.g., oxidizing) atmosphere, with a cathode (17) disposed in an evacuable coating chamber (16) and electrically cooperating with the target (25), the cathode (17), for the purpose of suppressing arcs, is connected to a DC power source and can be brought to a positive potential for brief time periods by means of an additional circuit (22, and 3 to 15, respectively), the frequency of this periodical polarity reversal being adjustable, depending on the coating to be deposited
摘要:
A vacuum chamber contains means for transferring a substrate for an information disc such as a CD from a loading station to a coating station, where material such as aluminum in wire form is evaporated in order to coat the substrate from above. An evaporation nozzle is continuously supplied with wire at a rate according to the coating thickness. The nozzle may be heated either resistively in order to evaporate the wire therein, or the wire may be directly heated by an induction coil.
摘要:
Apparatus for generating and controlling an electron gun in a vacuum envelope comprising, a cathode, means for controlling the temperature of the cathode to control its current emission, an auxiliary electrode with an aligned opening mounted adjacent to said cathode and with the electron beam from the cathode passing through said aligned opening, means for maintaining the voltage of said auxiliary electrode slightly more negative than said cathode, and an annular anode mounted in a spaced relationship from said cathode and said auxiliary electrode.
摘要:
An electron-optical lens arrangement for electron beam apparatus having a static and a dynamic focussing lens system, in which the dynamic focussing lens system is situated inside the static focussing lens system.
摘要:
An electron beam generator designed for engraving surfaces of printing form cylinders is switched to microscope operation during engraving pauses in order to make engraved cups visible immediately and without additional auxiliary equipment. During microscope operation, deflection parameters and an intensity of an electron beam produced by the electron beam generator are changed for appropriate scanning. An image signal is acquired by detecting secondary electrons generated by the beam interacting with the cups in the printing form surface.