Method and apparatus for manufacturing magnetic recording medium

Details Method and apparatus for manufacturing magnetic recording medium Method and apparatus for manufacturing magnetic recording medium

1990-03-12

1991-01-08

Wityshyn, Michael G.

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

239127, 425215, B05C 318, B05C 502

Patent

active

049826875

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.

REFERENCES:
patent: 2651586 (1953-09-01), Cooper et al.
patent: 4367249 (1983-01-01), Bloom et al.
patent: 4416214 (1983-11-01), Tanaka et al.
patent: 4424762 (1984-01-01), Tanaka et al.
patent: 4675208 (1987-06-01), Kageyama et al.
patent: 4831961 (1989-05-01), Chino et al.

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