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| Number | Title | Issue Date |
| 7102794 | Method for engraving printing cylinders In a method and apparatus for engraving printing cylinders in an electronic engraving machine, an engraving control signal is formed from an image signal, which represents the tonal values of the cups to be engraved, and from a raster signal for generating a printin... | 09/05/2006 |
| 7102795 | Method for engraving printing cylinders In a method and apparatus for engraving printing cylinders in an electronic engraving machine, an engraving control signal is formed from an image signal that represents tonal values of cups to be engraved and from a periodic raster signal for generating a printing ... | 09/05/2006 |
| 7085018 | Method for engraving printing cylinders In a method for engraving printing cylinders in an electronic engraving machine, printing densities are matched in individual engraving lanes by engraving cups in the printing lanes with which the prescribed characteristic rated printing densities are to be achieved... | 08/01/2006 |
| 7031027 | Method and apparatus for setting the idle distance of an engraving stylus from the cylinder surface of a rotogravure printing cylinder An idle distance of an engraving stylus for engraving a rotogravure printing cylinder is set from the cylinder surface of the rotogravure printing cylinder by use of a sliding element that is provided for the guidance of the engraving stylus connected to the sliding... | 04/18/2006 |
| 6985264 | Method for calibrating an engraving amplifier In a method for calibrating an engraving amplifier in an electronic engraving machine, whereby a vibration signal is used to control the engraving of an engraving element by using engraving tone values representing desired tone values ranging from “light” to “... | 01/10/2006 |
| 6950212 | Method for making and evaluating a sample cut In a method for making and evaluating a sample cut in an engraving machine, an engraving control signal for guiding a stylus is formed from engraving data. The stylus cuts a series of cups. During a trial engraving trial cups are engraved and a video image is made. ... | 09/27/2005 |
| 6940622 | Method for generating and evaluating a sample engraving In a method for making and evaluating a sample engraving in an electronic engraving machine for engraving printing cylinders for rotogravure, during a sample engraving, trial cups are engraved for predetermined tone values by an engraving element. After the sample e... | 09/06/2005 |
| 6940621 | Engraving member An engraving element of an electronic engraving machine for engraving printing forms is formed of a shaft oscillating around a longitudinal axis with small rotational angles. A drive system is provided for the shaft with a lever attached to one end of the shaft. An ... | 09/06/2005 |
| 6888853 | Laser radiation source A system and method for selectively process material on a processing surface of a printing form to create a fine structure or pattern for images or text. At least one fiber laser comprising a pump source and a laser fiber is provided. A laser gun is mounted adjacent... | 05/03/2005 |
| 6877423 | Method to produce a printing form for rotogravure, printing form for rotogravure and their use 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 printi... | 04/12/2005 |
| 6789470 | Cooling device for cooling an engraving system In a cooling device and method for cooling an engraving system of an engraving device given engraving devices for engraving printing form surfaces, the cooling device comprises a plurality of cooling units wherein each cooling unit is allocated to respectively cool ... | 09/14/2004 |
| 6771390 | Method for modifying the size of line elements In a method for changing the size of line elements on a printed page, first the nature of the size change is determined and a positive/negative identifier identifying the nature (positive/negative) of the line elements is determined for each pixel of the printed pag... | 08/03/2004 |
| 6768561 | Method for signal processing In a method for processing signals in an electronic engraving machine for engraving printing forms, in particular printing cylinders used for rotogravure, an engraving control signal is obtained by superimposing engraving data, representing tone values between “wh... | 07/27/2004 |
| 6747750 | Method for operating an engraving member In a method for engraving a printing cylinder using an engraving member in an electronic engraving machine, an engraving tool of an engraving member controlled by an engraving signal engraves a sequence of grooves arranged in a printing screen in a rotating printing... | 06/08/2004 |
| 6741369 | Method for the operating an engraving member 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 arr... | 05/25/2004 |
| 6736035 | Engraver In an engraver of an electrical engraving machine for engraving pressure cylinders, the engraver comprises a rotating system which oscillates around small angles. The engraver further comprises a drive system for the rotating system and of an engraving element that ... | 05/18/2004 |
| 6717701 | Signal processing method In a method for processing signals in an electronic engraving machine for engraving printing forms, engraving control signals for guiding the stylus of an engraving element are obtained from engraving data representing predetermined tone values between “light” (... | 04/06/2004 |
| 6634286 | Engraving mechanism for electronic engraving machines An engraving element of an electronic engraving machine for engraving printing cylinders as a shaft oscillating with small rotational angles around the longitudinal axis, a restoring element, a shaft bearing, a damping mechanism, a drive for the shaft, a ... | 10/21/2003 |
| 6570603 | Multi-beam exposure method In a method for multi-beam exposure of a printing form, preferably with laser beams, a computer transmits printing form data to a distributor via a data line as a sequence of recording lines and the distributor cyclically distributes the recording lines o... | 05/27/2003 |
