# TEWS ELEKTRONIK GMBH & CO. KG

TEWS ELEKTRONIK GMBH & CO. KG Patent applications | ||

Patent application number | Title | Published |
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20150012228 | METHOD FOR ONLINE MEASUREMENT OF A PLASTICIZER IN AN ENDLESS FILTER ROD AND A DEVICE FOR PRODUCING AN ENDLESS FILTER ROD OF THE TOBACCO PROCESSING INDUSTRY - A method for online measurement of a plasticizer in an endless filter rod, includes: measuring a resonance shift (A) and line broadening (B) with a microwave resonator at a passing endless filter rod, determining a mass per length of plasticizer from the measurement variables (A, B), measuring a reference mass of plasticizer applied per time with the application of the plasticizer onto the filter tow band, determining an averaged reference mass per length of plasticizer from the measured mass applied over a time period, averaging the values for mass per length of plasticizer, determined using the measurement variables over the same time in which the reference mass of plasticizer is determined, determining a deviation between the averaged reference value for the mass per length and averaged mass per length and correcting the mass per length, determined from the measurement variables of the microwave resonator, according to the determined deviation. | 01-08-2015 |

20140043045 | Method and Device for Measuring the Position of Segments with Absorbing Substances in Multi-segment Filter Rods of the Tobacco Processing Industry - A method and device for measuring the position of sections with an absorbing substance in multi-segment filter rods of the tobacco processing industry by measuring a varying shift of the resonance frequency A and/or spread of the resonance line B during movement of the rod in the longitudinal direction, using a microwave resonator, which has a field concentration in a spatial area, wherein this spatial area is smaller in the rod direction than the segment length to be determined, forming a difference quotient ΔA of the resonant frequency shift A and/or ΔB of the resonance line spread B relative to the longitudinal direction, determining local extreme values of the respective difference quotients, and assigning local extreme values as a position of a transition from a section with higher content of absorbing substance to a section without, or with lower content, of absorbing substance, and vice versa. | 02-13-2014 |

20120006338 | Device for Producing Cigarettes in the Tobacco Processing Industry and a Method Therefore - A device for producing cigarettes in the tobacco processing industry that has a tobacco processing unit and a paper feeding unit, which feeds a paper having LIP strips to the tobacco processing unit, wherein the paper feeding unit has a measurement device, which continuously detects the LIP strips, wherein the measurement device has a microwave resonator, through whose measurement region the paper having the LIP strip is passing, and which detects a shift of the resonance curve and/or a broadening of the resonance frequency. | 01-12-2012 |

20100295556 | Method and Device for Humidity and/or Density Measurement - The invention relates to a method for humidity and/or density measurement in a sample material, using a microwave transmitter, a microwave receiver and an analytical unit which can determine the phase and amplitude of microwave radiation from the microwave transmitter received by the microwave receiver and n which a complex transmission function for the measuring arrangement can be stored. Said method comprises the following steps: the phase and amplitude are determined for a number of frequencies of the microwave radiation transmitted through the sample material, using the complex transmission function for the measuring arrangement the complex transmission function sample material is calculated from the determined values and transformed into the time domain as a complex time domain function, the maximum value of the main pulse is determined as parameter A from the time domain function, the width of the main pulse is calculated as parameter B from the time domain function and/or the amplitude value for the main pulse is determined as parameter H and a humidity and/or density of the sample material is determined based on the parameter A and the parameter B and/or H. | 11-25-2010 |

20100176818 | Apparatus and method for the measurement of mass and density and/or for the measurement of the humidity of portioned units - Method and apparatus for the measurement of mass or density and/or for the measurement of the humidity in a plurality of portioned units in a non-metallic carrier material, which provides the following: a microwave measuring instrument, consisting of at least one microwave resonator for generating at least one resonance mode in a spatially limited measurement area and an analysing unit for analysing at least one variable of the at least one resonance mode, a conveying device for the carrier material, which transports the carrier material with the portioned units through the measurement area, the microwave measuring instrument measures at least one variable of the at least one resonance mode at a time when only the carrier material without portioned unit is in the measurement area, and at a time when the portioned unit is at least partially in the measurement area, the analysing unit subtracts the variable measured for the carrier material from the measurement values for the portioned unit, and determines a value of the humidity and/or of the mass or density of the portioned unit from at least one difference by way of an input-output map. | 07-15-2010 |