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    Thermoplast viscosity testing machine - with weight operated plunger expelling material through nozzle
    1.
    发明专利
    Thermoplast viscosity testing machine - with weight operated plunger expelling material through nozzle 未知

    公开(公告)号：DE2140619A1

    公开(公告)日：1973-02-22

    申请号：DE2140619

    申请日：1971-08-13

    Applicant: BASF AG

    Inventor： NOETZEL WOLFRAM DR ,  DAUR THEODOR DR

    IPC: G01N11/04 ,  G01N11/06

    Abstract: The parent patent covers a viscosity testing machine where weights actuate a thrust rod expelling the material from a testing cylinder through a nozzle, the rate of expulsion being measured. The addition comprises the following automatically controlled improvements; a motor driven feed screw in the feed duct supplying plastics to the unit; a wiper which keeps the plunger shaft clean of plastics spilling through the gland of the cylinder, but is removed from this shaft during the measureing run; and a two-part weight, comprising a heavy weight for tamping the material and a determined weight which is used alone during the test operation.

    Blown tube optically examined - continuously without contact before being flattened
    5.
    发明专利
    Blown tube optically examined - continuously without contact before being flattened 未知

    公开(公告)号：DE2158376A1

    公开(公告)日：1973-05-30

    申请号：DE2158376

    申请日：1971-11-25

    Applicant: BASF AG

    Inventor： NOETZEL WOLFRAM DR ,  DAUR THEODOR DR ,  JANSEN GERHARD DIPL ING

    IPC: G01N21/952 ,  G02B27/54 ,  G01N33/44

    Abstract: A method for continuously, automatically examining a plastics tube to detect inhomogeneities is as follows: the tube after leaving the cooling ring of the extruder passes without contact perpendicularly to the line through the diaphragms of an optical detector between two symmetrically arranged lenses; the light beam passing through the apparatus is projected onto a screen and converted into electrical signals which are continuously recorded. The method enables point-type faults such as "fish-eyes" to be detected in preference to longitudinal streaks, while the tube is still in its blown state before being flattened into a sheet.

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