Coating method and apparatus, method of making substrate roll, and magnetic tape
AssigneeFUJIFILM Corporation
InventorsToshihiro MANDAI, Tomohiro SATOU, Satoshi NAGANO
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Abstract
A method of coating a moving web of a substrate with a coating, includes applying the coating to the substrate to provide a coating thickness distribution curve along a width direction of the substrate such that: the coating thickness decreases from a position where the thickness is the maximum to the opposite ends of the curve and that the distribution curve has the least curvature at the position with the maximum thickness and contains an end portion having a larger curvature than that of the position with the maximum thickness on both sides of the position with the maximum thickness.
Claims9
A method of coating a moving web of a substrate with a coating, comprising applying the coating to the substrate to provide a coating thickness distribution curve along a width direction of the substrate such that:
- the coating thickness decreases from a position where the thickness is the maximum to the opposite ends of the curve and that
- the distribution curve has the least curvature at the position with the maximum thickness and contains an end portion having a larger curvature than that of the position with the maximum thickness on both sides of the position with the maximum thickness.
A coating apparatus for coating a moving web of a substrate with a coating, comprising:
- a cavity for containing a coating,
- a slot connecting to the cavity and having an opening through which the coating is applied to the substrate, and
- a configuration for adjusting the weight of the coating to be applied to the substrate to provide a coating weight distribution curve across the substrate such that the coating weight decreases from a position where the coating weight reaches the maximum to the opposite ends of the curve and that the distribution curve has a first portion including the position with the maximum coating weight and having the least curvature and a second portion which is located on each side of the first portion and has a larger curvature than the position with the maximum coating weight.
A method of making a wound roll of a web of a substrate coated with a coating layer, comprising:
- applying a coating to the substrate to provide a coating thickness distribution curve across the substrate such that the coating thickness decreases from a position where the thickness is the maximum to the opposite edges of the substrate along the width direction of the substrate and that the distribution curve has a first portion including the position with the maximum thickness and having the least curvature and a second portion which is located on each side of the first portion and has a larger curvature than the position with the maximum thickness and
- winding the web of the substrate coated with the coating into roll form.
Dependencies are inferred from the claim text.