J. M. Voith Gmbh

Hartmut Waldvogel

Robert Wolf

Friedrich Kuhn

Gunter Rohde

Franz Krautzberger

Heinrich Flaig

Kurt Brandauer

Georg Honold

A coating apparatus for coating a moving web is disclosed. A scraper element is provided, transverse to the direction of travel of the web, for scraping excess coating material therefrom. The scraper element has three positions: a rest position, in which it is relatively distant from the web; a ready position, in which it is maintained a short distance from the surface of the web, preferably about 1 mm; and an operating position, in which it is pressed against the web. A positioning member includes a first subsystem for moving the scraper element from the rest position to the ready position and a second subsystem for moving the scraper element from the ready position to the operating position. The second subsystem preferably contains a pneumatic pressure element, and the first includes either a pneumatic or a hydraulic pressure element. The two subsystems are connected to each other in series. Adjustable stops are preferably provided to limit the motion of the scraper element toward the web, thereby defining the operating position. In the preferred embodiment, independently adjustable stops are provided at both ends of the scraper edge, so that the pressure of the scraper element on the web can be made to vary across the width thereof.

Coating apparatus

An apparatus and process are disclosed for scraping excess coating substance from a running web by moving the web past a scraper blade that is oriented transversely to the running direction of the web. The blade is pressed against the web with a variable force. A motor automatically moves the blade to maintain the angle between the scraping surface thereof and the web approximately constant when the force varies, preferably by rotating the blade about an axis which is located near the scraping surface, is transverse to the running direction of the web and extends generally parallel to the blade direction of extension across the web. The amount of movement of the blade that is necessary to maintain the angle constant is preferably determined by monitoring either the thickness of the coating on the web or the degree to which the force on the blade deforms the blade from an undeformed shape. The automatic system can preferably be disabled to permit the blade angle to be set at a selected value manually.

Apparatus for scraping excess coating substance off a running web

A rolling device for rolling up a sheet onto roll formers or spools: a roll former is inserted between and supported on two supporting rollers and a sheet is wound on it; the finished wound roll on its roll former is lifted off one of the supporting rollers looping the sheet, and the slack loop section is stapled to the next roll former; the sheet is cut off at the new roll former.

Device and method for rolling up continuous sheets

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Heidenheim, Germany

Hartmut Waldvogel