摘要:
The resonant frequencies of a rotor supported on magnetic bearings, in particular a rotor of a turbomolecular vacuum pump, are determined. While the rotor is stationary or the rotor is rotating at a relatively low rotation frequency, mechanical oscillations of the rotor are generated by electromagnets in the magnetic bearing. The rotor oscillations are detected by rotor-position sensors in the magnetic bearing. The resonant frequencies of the rotor are determined from the detected rotor-position oscillations.
摘要:
A method and apparatus for treating the surface of substrates such as printed sheets, with improved surface quality. The apparatus includes a first roller (2, 7) rotatable in a first direction and forming a placement surface for traveling printed sheets, one or more second rollers (4, 5, 6) mounted parallel to the first roller (2, 7) for defining a roller nip with the first roller through which the sheets are directed and for exerting a predetermined radial pressing force against the sheets, the second rollers (4, 5, 6) being rotatable in a direction opposite to the direction of rotation of the first roller (2, 7) and at least some of the second rollers (4, 5, 6) having a heating device for heating the printed sheet in the area of the roller nip between the first and second rollers.
摘要:
Temperature control of the coating medium is performed to influence the processability of coating media in an applicator system. In order to operate without losing efficiency, devices acting directly from the inside or the outside for heat supply or dissipation are connected to the elements guiding the coating medium. The temperature of the coating medium is influenced by measuring the temperature within the coating medium and, if necessary, at the elements guiding the coating medium.
摘要:
A method and an apparatus for an exact measurement of the thickness of a plurality of individual semi-conductor and insulation layers and the determination of the centricity/eccentricity of a medium-voltage and/or high-voltage insulated conductor. The individual semi-conductor and insulation layers of the insulated conductor emerging from an extrusion device are penetrated with X-rays in at least two directions laying within a plane orthogonal to the axis of the insulated conductor. On carrying out a line-scan intensity detection of the X-rays having penetrated the insulated conductor, the thickness of the individual layers as well as the position of the conductor is computed. These values are compared with target ones, and, if necessary, the position of the extruder heads can be corrected accordingly.
摘要:
A method and apparatus for applying a liquid medium to a printing carrier in offset printing machines. It is suitable for processing media of different viscosity, such as low-viscosity dispersion lacquers or higher-viscosity bronze and effect printing inks. In order to guarantee precise metering, two function modules are assigned in an exchangeable manner to a forme cylinder in two bearings. If processing of low-viscosity media is required, the first function module, consisting at least of a metering roller and an applicator roller, is used. For processing higher-viscosity media, the second function module, consisting at least of a screened applicator roller and a chamber-type doctor, is used.
摘要:
An operating table includes a support surface with several support surface sections hydraulically adjustable relative to one another, a support column for the support surface with a column head (16) on which head the support surface is supported for pivotal movement and hydraulic adjustment and with a column foot (14) which is connected with the column head (16) through a hydraulic lifting apparatus (18), and a hydraulic unit (24) for operating the lifting apparatus and the work cylinders for adjusting the support surface sections. The hydraulic unit (24) is arranged on the column head (16). The lifting apparatus (18) includes two antiparallel lifting cylinders (26, 28) arranged next to one another and connected in parallel with one another having similar interior cross sections, the piston rod (30) of one cylinder being connected with the column head (16) and the piston rod (32) of the other cylinder being connected with the column foot (14). The pressure fluid supply and exhaust for the lifting apparatus (18) takes place through the piston rod (30 ) connected with the column head (16).
摘要:
An operating table for operations on extended extremities of patients includes a frame 10, a support plate 18 and a counterbar 32 at one end of the support plate 18 for propping the patient. Two vertical receiving openings 64, in which the counterbar 32 can be selectively inserted, are arranged outwardly from the longitudinal middle plane of the support plate 18, whereby the operation field is increased for better transmission of X-rays and whereby the counterbar 32 may also be used as a groin support for a patient lying on his side. The vertical receiving openings 64 are formed in an adaptor 84 which also similarly has transversely directed receiving openings 92,94 for supplemental devices laterally attached to the end of the support plate 18 and longitudinally directed receiving openings 104,106 for supplemental plates which effect a lengthening of the support plate 18.
摘要:
A supercharged diesel engine having at least one charged air conduit for distributing charged air and having a first chamber for conveying the charged air. Air inlet openings of the cylinder head are connected to the first chamber in a gastight manner. The charged air conduit has at least one second chamber, which is separate from the first chamber and has a removable lid. The fuel reservoir is secured in the second chamber, which is provided with a first passage allowing the high pressure fuel line and the fuel reservoir to communicate with one another. The second chamber has at least one second passage, facing the cylinder head, allowing the fuel injection lines and fuel connections on the cylinder head to communicate with one another. With the lid in place, the second chamber encloses the fuel reservoir, the fuel injection lines and the fuel connections such that in the event of leakage at any of them, leaking fuel flows into the second chamber.
摘要:
A method and apparatus for processing a printing ink containing inhibitors and oligomers in a printing unit of a rotary printing machine in which the drying times of the printing ink on the printing material is shortened and the printing quality improved. In the illustrated embodiments, the printing unit includes two cylinders that form a press nip in which the printing ink is applied to passing printing material, and a catalyst mixture is applied to the printing material either by one of the cylinders or through an applicator device downstream of said press nip. A heating device is located in the conveying direction immediately downstream of the press nip or the applicator device.
摘要:
The invention relates to a sheet-fed rotary printing machine with printing units for multi-color printing and with at least one coating unit. The object of the invention is, inter alia, to provide a sheet-fed rotary printing machine of the type described in the introduction, in which at least one coating unit can be used more universally and set-up times are reduced. This is achieved in that the coating unit 2, 3 is formed from an impression cylinder 10, a form cylinder 12 and a metering system 14 with a screened applicator roller 13. The applicator roller 13 has a circular segment congruent to the cylinder pit of the form cylinder 12, is at least the same size as the form cylinder 12 and can be imaged as a rough intaglio printing form.