Agfa-gevaert Ag

Basf Magnetics Gmbh

Siegfried Rieger

Albert Pertzsch

Reinhard Kratschmer

Johann Baarfusser

Lothar Langer

Reinhard Kraetschmer

Reinhold Nentwich

Joachim Mittmeyer

Franz-Xaver Wagner

Michael Breitsameter

Friedrich Ankenbrand

In an extrusion coater having at least two coating slots (8, 8'), the central line between the coating slots is arranged perpendicular to the plane of the substrate (1) and the terminating edge (15) of the separator (16) between the two coating slots is a downward-sloping surface. Opposite the extruder orifice and behind the substrate is the edge (5) of a magnet (2) which draws the magnetizable layers out of the coater outlet orifice (3), the edge (5) being arranged at the height of the common outlet orifice of the coating slots (8, 8'). By means of this arrangement, a uniform coating is achieved even in the case of very thin double layers and even at high coating speeds.

Apparatus for the production of a magnetic recording medium

Production of a magnetic recording medium

An apparatus by which layer thickenings formed transversely to the direction of movement of a coated web are removed after the continuously moving web has been coated with liquids or dispersions, for example a web of photographic film or paper or magnetic recording carrier, are described. A deflecting roller (4) over which the web travels with its coated side facing the roller is situated downstream of the coating and drying devices. When a layer thickening approaches, a cleaning roller (2) covered with a fleece is swung into contact with the web, whereupon the web travels only over the cleaning roller.

Apparatus for the removal of thickenings formed in coatings transversely

Elimination of beads created along the edge during coating magnetic binder containing dispersions on a flexible support by subjecting the coated dispersion to the stray field of a magnetic circuit consisting of permanent magnets and soft magnetic conductor elements, the central line of the gap of the magnetic circuit extending downstream the moving support at an angle up to 10.degree. in the direction towards the border of the support.

Method for coating magnetic, binder-containing dispersions on flexible

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Groebenzell, Germany

Siegfried Rieger