Method of applying a liquid to a moving web

Details Method of applying a liquid to a moving web Method of applying a liquid to a moving web

1990-06-21

1991-04-30

Pianalto, Bernard

Coating processes

Immersion or partial immersion

Running lengths

427128, H01F 1002, B05D 118

Patent

active

050117149

ABSTRACT:
A method and apparatus for coating a magnetic liquid onto a moving substrate to form a magnetic recording medium having an improved product yield and reduced streaking. Coating liquid is fed to an extruder by a second pump, while excess coating liquid is extracted from the extruder and returned to a storage tank with a second pump. When the coating operation is to be stopped, the extruder is bypassed between the first and second pumps and a portion of the output from the first pump is returned directly to the storage tank so that the flow rates through both pumps are the same during coating and idling times.

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