Patents Assigned to Arova Schaffhausen AG
  • Patent number: 6805939
    Abstract: The areally extended composite material (1) contains fibers (20, 30) which are impregnated with plastic (21). The composite material comprises at least two arrays of parallel fiber cords (2, 3) which extend in different directions and which form a web, mesh or grid. The fiber cords can be bundle-like or band-like. The fibers (20) of a first array (2) are impregnated with substantially more plastic (21) than the fibers (30) of a second and possibly of a further array (3). The composite material (1) is stiff in the direction of the fibers of the first array and is flexible transversely to this direction. Openings advantageously exist between the fiber cords.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: October 19, 2004
    Assignee: Arova Schaffhausen AG
    Inventors: Albert Maria Vodermayer, Wolfram Fritz. W. Auersch
  • Patent number: 6589377
    Abstract: The method for the manufacture of sections of fiber-plastic compound materials is carried out by means of at least one draw nozzle (10). In this nozzle, fibers (41) which are impregnated with flowable plastic (42) are formed under pressure to a product (41) with a predetermined cross-section and consolidated with the withdrawal of heat. The cross-sectional surface of the draw nozzle is periodically increased and decreased in time in its entire shape imparting region, with a value for the frequency of the oscillating cross-sectional surface being chosen less than 1 kHz, preferably less than 100 Hz.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: July 8, 2003
    Assignee: Arova Schaffhausen AG
    Inventors: Albert Maria Vodermayer, Jens Kärger, Hans Erlach
  • Patent number: 6528611
    Abstract: The method for forming a finely divided polymerizate in the form of a dispersion (D) of particles (50, 51) for the purpose of manufacturing powder lacquers or fiber compound materials comprises two steps: 1) In a first step a solution (S1) of a polymer (P), which is dissolved in a first liquid (L1), is emulsified in a second liquid (L2). The polymer is not soluble in the second liquid. The first liquid has a lower boiling point than the second and it is soluble in the second only to a limited extent. Owing to the limited solubility the polymer remains dissolved in the droplets which arise during the emulsification. Under the influence of mechanical means—in particular of a high speed stirring apparatus (31, 32)—and by shear forces caused by the latter, droplets are formed, the average diameter (d) of which corresponds to one of the named uses and is preferably less than 0.03 mm.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: March 4, 2003
    Assignee: Arova Schaffhausen AG
    Inventors: Albert Maria Vodermayer, Lothar Kuhnert