Apparatus for the detection of holes and plugged spots
September 18, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3577767 3762211 Method and apparatus for measuring the permeability of a material Portable instrument for measuring the permeability of a papermaker's felt Method and apparatus for nonsteady state testing of permeability Method for measurement of the permeability to water Method and device for measuring permeability/penetrability of fabric in a paper machine Apparatus for measuring the condition of a felt in a paper machine Apparatus for determining the air permeability of a cloth web Patent #: 5412976 InventorsApplicationNo. 710519 filed on 09/18/1996US Classes:162/263, Measuring, testing, inspecting, indicating or illuminating73/37.7, Sheet or filament73/38, Porosity or permeability162/198, With measuring, inspecting and/or testing162/275Means applying fluidExaminersPrimary: Chin, PeterAssistant: Fortuna, Jose A. Attorney, Agent or FirmInternational ClassesG01N 015/08D21F 007/06 AbstractThe invention relates to an apparatus for detecting plugged sites and holes and for measuring of the water permeability properties of pervious machine fabrics. Plugged sites in a permeable fabric are detected by sensing water pressure pulses occurring in the nozzle at the moment when a stream of water flowing through the nozzle contacts a plugged site on a fast running fabric. The apparatus can be used on-line to simultaneously detect plugged sites and holes on a moving pervious fabric while monitoring its water permeability properties. | |
