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| 20090023567 | Coated Member, Especially Roller, Made of Carbon Fiber-Reinforced Plastic (CFK) for Paper Machines and Printing Presses, and Method for the Production of such a Member - Coated body of carbon fiber reinforced plastic (CFP) for paper machines and printing machines, particularly roller, comprising an adhesion promoter layer and a wear protective layer of hard metal or oxide ceramics which is applied onto the adhesion promoter layer, characterized in that the adhesion promoter layer consists of ductile metal selected from the group consisting of copper, nickel, iron, lead and tin and is applied by plasma spraying or flame spraying. | 01-22-2009 |
| 20110048260 | ROLLER BODY HAVING A ROLLER COATING FOR IMPROVED INK-WATER-EMULSION FORMATION IN PRINTING UNITS OF WET OFFSET MACHINES AND METHOD FOR THE MANUFACTURING THEREOF - There is provided a roller body made of steel, aluminium or carbon fibre reinforced plastic material, which, in printing units of wet offset machines, are in direct contact to the dampening form roller and which serve the formation of a stable ink-water-emulsion. There is further provided a method for producing such roller bodies. In conformity with the invention the roller body is provided with a porous coating of highly wear-resistant oxide ceramics or of wear-resistant hard metal, wherein pores that are open towards the circumferential surface of the roller body, are formed in the layer matrix of the coating preferably by applying the porous coating by a thermal spray process or an other coating process, and by subsequently grinding the coating to size to thereby open pores in the layer matrix. The surfaces produced in this manner preferably have a stable roughness of | 03-03-2011 |
| 20110053741 | CORONA ROLLER AND METHODS FOR PRODUCING A CORONA ROLLER - Corona roller comprising a cylindrical base body and a roller cover of dielectric material, and method for producing it. The roller cover includes a layer of thermoplastic material, e.g. polyamide, applied onto the outer surface of the base body. Solid (powder) particles having electrically insulating characteristics are imbedded in the material matrix of said layer in the vicinity of the surface thereof in a form-locking manner such that merely a partial region of said particles protrudes from said inner layer. A hard, wear- and corrosion-resistant surface is formed at the outer side of the layer of plastic material, said hard, wear- and corrosion-resistant surface likewise having electrically insulating characteristics. For producing the corona roller, the layer of thermoplastic material is heated to a viscosity similar to that of honey. Preferably, a layer of oxide ceramic then is applied by thermal spraying, wherein the first powder particles thereof are shot into the heated layer of plastic material and subsequent particles form an outer functional layer. Alternatively, insulating particles of solid material may be dispersed into the heated layer of plastic material and may be ground thereby forming the wear-resistant surface. | 03-03-2011 |
| 20110123767 | COATING OF A BODY MADE OF STEEL OR CARBON-FIBER REINFORCED PLASTIC MATERIAL, AND METHOD FOR PRODUCING SUCH A COATING - There is provided a coating for a body of steel or a carbon fiber reinforced plastic material, particularly a roller, with an adhesion-promoting layer of thermoplastic that is deposited on the body, in the surface near material matrix of which solid (powder) particles are embedded in a form-fitting adhering manner such that only a partial region of these particles projects from the adhesion promoting layer, as well as with a functional layer of oxide ceramic or wear-resistant hard metal overlaying the adhesion-promoting layer, in which the partial regions of the particles projecting from the adhesion-promoting layer are embedded. For producing such a coating, the adhesion-promoting layer preferably is heated to a honey-like viscosity, and powder particles are injected, for example by thermal spraying, into the surface near material matrix of the heated adhesion-promoting layer in a form-fitting adhering manner such that only the tips of these particles project. These tips connect to subsequently deposited powder particles which form the functional layer of oxide ceramic such as Al | 05-26-2011 |
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| 20080252505 | Read and Write Interface Communications Protocol for Digital-to-Analog Signal Converter with Non-Volatile Memory - A mixed signal device, e.g., digital-to-analog converter (DAC) device has a serial interface communication protocol that accesses volatile and/or nonvolatile memory and allows a preprogrammed output voltage whenever the mixed signal device is powered-up. However, unlike conventional DAC devices, DAC devices with non-volatile memory may need special interface communication protocols for effective operation of the DAC device and communications between a system master controller unit (MCU). Interface communications protocols that do not violate standard serial bus communications protocols are provided for communicating between the volatile and non-volatile memories of the DAC device so that the MCU may access the DAC device's memories (non-volatile and/or volatile memories). | 10-16-2008 |
| 20090179785 | Read and Write Interface Communications Protocol for Digital-to-Analog Signal Converter with Non-Volatile Memory - A mixed signal integrated circuit device, e.g., digital-to-analog converter (DAC), has a serial interface communication protocol that accesses volatile and/or non-volatile memory and allows a preprogrammed output voltage whenever the mixed signal device is powered-up. However, unlike conventional DACs, DACs with non-volatile memory may need special interface communication protocols for effective operation of the DAC and communications between a system master controller unit (MCU). Interface communications protocols that do not violate standard serial bus communications protocols are provided for communicating between the volatile and non-volatile memories of the DAC so that the MCU may access the DAC's memories (non-volatile and/or volatile memories). The mixed signal integrated circuit device has a user programmable address. | 07-16-2009 |
| 20110074495 | COMPENSATED BANDGAP - An integrated circuit has an untrimmed bandgap generation circuit; and a bandgap generation circuit coupled to the untrimmed bandgap generation circuit. The bandgap generation circuit has a current source controlled by the untrimmed bandgap generation circuit and coupled in series with a resistor and a first bipolar diode device, one or more of bipolar diode devices, each bipolar diode device coupled in parallel with the first bipolar diode device, wherein a trimmed bandgap reference voltage output of the integrated circuit is a function of the number of bipolar diode devices. | 03-31-2011 |
| 20110163901 | 2-PHASE GAIN CALIBRATION AND SCALING SCHEME FOR SWITCHED CAPACITOR SIGMA-DELTA MODULATOR USING A CHOPPER VOLTAGE REFERENCE - A sigma-delta modulator has a chopper voltage reference providing a reference signal having a clock dependent offset voltage, a single-bit or a multi-bit digital-to-analog converter (DAC); a plurality of capacitor pairs; a plurality of switches to couple any capacitor pair to an input or reference signal; and a control unit controlling sampling through said switches to perform a charge transfer in two phases wherein any capacitor pair can be selected to be assigned to the input or reference signal, wherein after a plurality of charge transfers a gain error cancellation is performed by rotating the capacitor pairs cyclically, and wherein a DAC output value and a reference offset state define switching sequences wherein each switching sequence independently rotates said capacitor pairs and wherein at least one switching sequence is selected depending on a current DAC output value and a current reference offset state. | 07-07-2011 |
