Apparatus for producing magnetic recording medium

Details Apparatus for producing magnetic recording medium Apparatus for producing magnetic recording medium

1987-07-10

1989-09-19

Morgenstern, Norman

Coating apparatus

Gas or vapor deposition

Running length work

118715, 55100, 209215, 2092231, 15DIG13, C23C 1600, B03C 100

Patent

active

048671010

ABSTRACT:
Contaminant magnetic dust particles and flakes generated during the thin film coating of a substrate 9 in a vacuum chamber 1 are gravitationally collected in catch pans or troughs 8 disposed below the deposition zones. Magnets 10 are provided under the bottoms of the pans to enhance the attraction and retention of the particles. The contaminants may alternatively or additionally be removed directly from an upper surface of the substrate web by sandwiching one or more of its horizontal conveyance runs between a pair of magnets 22, 23, with the pole face area of the lower magnet being larger than that of the upper one.

REFERENCES:
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patent: 4166789 (1979-09-01), Imai et al.
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patent: 4254585 (1981-03-01), Schoettle et al.
patent: 4378754 (1983-04-01), Rasekhi et al.
patent: 4380211 (1983-04-01), Shinohara
patent: 4420390 (1983-12-01), Carr
patent: 4457838 (1984-07-01), Carr
patent: 4565591 (1986-01-01), Shannon
patent: 4578280 (1986-03-01), Greiner et al.

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