Method and apparatus for applying a thin film of magnetic liquid

Coating processes – With post-treatment of coating or coating material – Solid treating member or material contacts coating

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Details

4274342, 427128, 118410, 118413, B05D 312, B05D 126

Patent

active

052021645

ABSTRACT:
A method of applying a liquid to a flexible substrate and more particularly to a method in which a magnetic liquid or the like is applied to a flexible area so that a thin liquid film is disposed on the carrier for manufacturing an application-type magnetic recording medium. The method includes positioning carrier and a back edge portion of an application head near each other, discharging the liquid from a slot provided in the head and lapping the carrier and the doctor edge portion of the head, located downstream of the slot, with each other at a predescribed lap angle for the application, and thereafter performing the application. The method further includes moving a path roller which is disposed upstream of the head and to adjust the lap angle, discharging the liquid from the slot of the head and moving the carrier to the head. According a further aspect of the invention, a downstream roller is moved in the direction of the carrier to further adjust the lap angle of the doctor edge portion. According to a further aspect of the invention, rather than translating the path rollers, the head is rotated a predescribed angle such that the back edge portion of the head is first placed near the carrier. Thereafter, liquid is discharged from the slot and the head is rotated so as to properly set the lap angle of the doctor edge portion.

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patent: 4995338 (1991-02-01), Morita et al.
patent: 5028450 (1991-07-01), Naka et al.

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