Coating processes – Magnetic base or coating – Magnetic coating
Patent
1991-06-12
1992-07-21
Pianalto, Bernard
Coating processes
Magnetic base or coating
Magnetic coating
478694, 478900, H01F 1002
Patent
active
051321327
ABSTRACT:
An apparatus for coating on a support a first magnetic coating solution so as to form a lower layer on the support continuously travelling and then coating a second magnetic coating solution on the first magnetic coating solution, which is in a non-dried state, so as to form an upper layer thereon to thereby produce a two-layer type magnetic recording medium. The apparatus comprises a first die for coating the first magnetic coating solution which includes first and second lip portions, the second lip portion having a top surface curved. The apparatus further comprises a second die for coating the second magnetic coating solution which includes first and second lip portions, the second lip portion similarly having a top surface curved. The first lip portion of each of said first and second dies has an edge A and the second lip portion has at both ends of the curved top surface edges B and C. The edge B is formed to be in confronting relation to the edge A of the first lip portion. The edge A of the first lip portion is arranged to be substantially on a tangential line of the edge B of the second lip portion and the support is arranged to be travelled so as to approach each die at a loading angle to be substantially parallel to the tangential line of the edge B of the second lip portion and to be separated therefrom at an unloading angle to be substantially parallel to an tangential line of the edge C of said second lip portion.
REFERENCES:
"Tosokogaku"; vol. 21 No. 10, pp. 475-479; 1986.
Hirose Satoshi
Watanabe Masaru
Matsushita Electric - Industrial Co., Ltd.
Pianalto Bernard
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