Magnetic recording medium and method of smoothing surface of magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorsNobuyuki Kobayashi, Masanori Yamamoto
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Abstract
In manufacturing a magnetic tape, a long web of non-magnetic base material is coated with a magnetic layer and, thereafter, subjected to a smoothing process, wherein the surface of the magnetic layer is abraded, ground, and then wiped out. For grinding, sapphire blades are kept in contact with the surface of the magnetic layer with their edges oriented in a transverse direction to the magnetic tape, and are moved back and forth in the transverse direction to the magnetic tape, while the magnetic tape is being conveyed in a lengthwise direction of the magnetic tape. Of the sapphire blades, adjacent two are moved in opposite directions to each other.
Claims9
A magnetic recording medium manufactured by coating a long web of non-magnetic base material with a magnetic layer, wherein a surface of said magnetic layer of said magnetic recording medium is ground by at least a grinding tool that is moved back and forth in a transverse direction to said long web, while said magnetic recording medium is being conveyed in a lengthwise direction of said long web.
A method of smoothing a surface of a magnetic layer of a magnetic recording medium after manufacturing said magnetic recording medium by coating a long web of non-magnetic base material with said magnetic layer, said smoothing method comprising:
- putting at least a grinding tool on the surface of said magnetic layer with an edge of said grinding tool oriented in a transverse direction to said long web;
- and
- moving said grinding tool back and forth in the transverse direction while conveying said magnetic recording medium in a lengthwise direction of said long web.
Dependencies are inferred from the claim text.