Heidelberger Druckmaschinen Ag

Eastman-kodak Company

Heidelberger Druckmaschinen

Zylum Beteiligungsgesellschaft Mbh & Co Patente Ii Kg

Thomas Zelenka

Wolfgang Eberhard Luxem

Eggert Joachim Jung

Eckhard Lindemann

Gerd Stange

Holger Runkowske

Rainer Bollmann

Wolfgang Stade

Johann Weigert

A measuring device () is provided for measuring the flow rate of a medium () flowing through measuring tube (). The measuring device () contains means for generating a constant magnetic field (B) perpendicular to the flow direction (v) of the medium () and at least two decoupling regions (') which are disposed in a plane (E) perpendicular to the flow direction (v) of the medium () on the wall () of the measuring tube (). Each decoupling region (&#x2032;) comprises an electrode (&#x2032;) which has a non-metal porous layer () on the side facing the medium () and a measuring unit () for detecting a measuring signal. In the measuring device (), the porous layer (&#x2032;) comprises an oxidic and/or non-oxidic ceramic material.

Measuring device and method for measuring the flow rate of a medium flowing through a measuring tube

Recognizing a substrate stock by light-sensitive sensors inside a printing unit, by a sensor that can recognize several ranges of light wavelengths. By separate recognition of various ranges of light wavelengths, a substrate stock is recognized whenever the total reflection capabilities of surface and substrate stock determined across all light wavelengths coincide.

Process and device for recognition of substrate stock by means of light-sensitive sensors

To regulate the gloss on a print material, and avoid excess release oil, the properties of the fusing medium are measured, and the gloss on the print material is determined on the basis of the measured properties of the fusing medium.

Procedure and device for adjusting gloss in print material

In a method and a circuit arrangement for driving laser diodes arranged in close proximity to one another in a laser recording device, video signals modulated with the information to be recorded generate driver currents for the laser diodes. The light powers output by the laser diodes drop due to crosstalk between the laser diodes. For compensation of the crosstalk, correction units are connected between first laser diodes that form crosstalk sources and second laser diodes that form crosstalk sinks. In the correction units, the driver currents of the first laser diodes are converted into correction signals according to the transfer functions of the correction units, the correction signals correcting the driver currents of the second laser diodes such that the crosstalk is compensated. For determining the transfer functions of the correction units, the time curves of the light powers in the crosstalk sinks are measured and approximately electrically simulated as transfer functions.

Method and circuit arrangement for driving laser diodes

A method and an apparatus for exposing photosensitive material, in particular for exposing a printing form, in which a surface to be exposed of the photosensitive material is scanned by at least one light beam. The light beam is emitted by a light source and, before striking the photosensitive material, is optionally modulated, interrupted and/or deflected. An exposure head is provided and moved at a constant distance from the surface in relation to the latter and to the light source in order to scan the surface of the photosensitive material with the light beam. In order to make the exposure head as light as possible, after the light beam has emerged from the light source substantially parallel to the surface to be exposed, the light beam is deflected through a gaseous medium toward the exposure head and there should be reflected onto the surface.

Method and apparatus for exposing printing forms

A device for detecting the position of rotating objects, having an optical signal transmitter and an optical sensor, includes a stationary light source provided in the optical signal transmitter for generating along an optical axis a light beam directed onto a rotating object, the optical sensor being stationary and being arranged on the optical axis on a side of the rotating object located opposite the optical signal transmitter, in the region of the optical axis of the signal transmitter and the sensor, the rotating object being formed with a diametrically extending bore having an entrance window for the light beam and an opposite exit window for the light beam, a slit diaphragm arranged in vicinity of the exit window, and an objective for focusing the light beam onto the slit diaphragm arranged in vicinity of the entrance window, the slit of the slit diaphragm being aligned with a transverse extent thereof at least approximately perpendicularly to an axis of rotation of the rotating object.

Growing community of inventors

Mönkeberg, Germany

Thomas Zelenka