Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Extrusion shaping means
Patent
1990-09-04
1992-03-10
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Extrusion shaping means
264 401, 264 402, 425140, 425141, B29C 4702, B29C 4792
Patent
active
050946005
ABSTRACT:
An apparatus for measuring eccentricities of a rod of plastic material extruded from an extruder includes an optical sensor arrangement having a central axis, the arrangement including a pair of optical sensor devices circumferentially spaced at 90 degrees to one another about the central axis and a pair of light sources disposed on sides of the central axis opposite to the respective optical sensor devices for providing shadows of the rod on the optical sensor devices. A mounting fixture supports the sensor arrangement with its central axis aligned with the nozzle axis of the extruder so that the extruded rod will travel along the central axis of the sensor arrangement. An output device is connected to the sensor devices for measuring deviations of the shadows from predetermined positions indicating concentricity of the rod.
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Matney, Jr. W. J.
Sikora Industrieelektronik GmbH
Woo Jay H.
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