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Daalmans
Gabriel Daalmans, Höchstadt DE
| Patent application number | Description | Published |
|---|---|---|
| 20090251137 | Method for determining the layer thickness of an electrically conductive coating on an electrically conductive substrate - An embodiment of the present invention discloses a method for determining the layer thickness of an electrically conductive coating which is applied on an electrically conductive substrate of a test object. First, the induced voltage of an eddy current sensor is collected in the air as a function of the frequency of an exciter field. The majority of coated reference objects which have been provided each contains a substrate and coating from the same materials, such as the substrate and coating of the test object. The reference objects display various known layer thicknesses. A reference voltage can be detected for each reference object as a function of the frequency of the exciter field with the eddy current sensor. Subsequently, a material induced voltage can be determined from the reference voltage and the induced voltage of the eddy current sensor in the air for each reference object. Afterwards, standard amplitude of the material induced voltage can be generated for each reference object. Thus, a calibration curve results, which represents the standard amplitude of the material induced voltage as a function of layer thickness of the coating. The standard amplitude is also determined in the same way for test objects. Thus, the layer thickness of the coating of the test object is determined by the calibration curve. | 10-08-2009 |
Gabriel Daalmans, Höchstadt DE
| Patent application number | Description | Published |
|---|---|---|
| 20090251137 | Method for determining the layer thickness of an electrically conductive coating on an electrically conductive substrate - An embodiment of the present invention discloses a method for determining the layer thickness of an electrically conductive coating which is applied on an electrically conductive substrate of a test object. First, the induced voltage of an eddy current sensor is collected in the air as a function of the frequency of an exciter field. The majority of coated reference objects which have been provided each contains a substrate and coating from the same materials, such as the substrate and coating of the test object. The reference objects display various known layer thicknesses. A reference voltage can be detected for each reference object as a function of the frequency of the exciter field with the eddy current sensor. Subsequently, a material induced voltage can be determined from the reference voltage and the induced voltage of the eddy current sensor in the air for each reference object. Afterwards, standard amplitude of the material induced voltage can be generated for each reference object. Thus, a calibration curve results, which represents the standard amplitude of the material induced voltage as a function of layer thickness of the coating. The standard amplitude is also determined in the same way for test objects. Thus, the layer thickness of the coating of the test object is determined by the calibration curve. | 10-08-2009 |
Johannes Henricus Theodorus Daalmans, Geleen NL
| Patent application number | Description | Published |
|---|---|---|
| 20100313605 | Process for Producing Long Glass Fibre-Reinforced Thermoplastic Compositions - The invention relates to a process for producing a long glass fibre-reinforced thermoplastic polymer composition, comprising the subsequent steps of a) unwinding from a package of at least one continuous glass multifilament strand containing at most 2% by mass of a sizing composition; b) applying from 0.5 to 20% by mass of an impregnating agent to said at least one continuous glass multifilament strand to form an impregnated continuous multifilament strand; and c) applying a sheath of thermoplastic polymer around the impregnated continuous multifilament strand to form a sheathed continuous multifilament strand, wherein the impregnating agent is non-volatile, has a melting point of at least 20° C. below the melting point of the thermoplastic matrix, has a viscosity of from 2.5 to 100 cS at application temperature, and is compatible with the thermoplastic polymer to be reinforced. This process allows trouble-free handling and unwinding of packages, no fouling of the equipment used, stable and constant production and good reproducibility during the sheathing step, and results in long glass fibre-reinforced thermoplastic products that can be made into articles having good mechanical properties and high quality surface appearance. | 12-16-2010 |