Magnetic tape surface treatment method and apparatus
AssigneeSony Corporation
InventorsKazuo Takahashi, Mitsuhiro Ono, Takumi Honma
Life of this patent
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Abstract
In a magnetic tape surface treatment method and apparatus for rubbing together a magnetic tape and a lapping tape and thereby removing projections and adhered matter from the magnetic surface to the magnetic tape pressurized air is blown onto the tapes to prevent the formation of an air film between the contacting surfaces of the two tapes. This enhances the contact quality and improves the surface treatment efficiency. Also uniformity of the surface treatment effect is enhanced by simultaneously controlling the tensions in the magnetic tape before and after the two tapes make contact.
Claims18
A magnetic tape surface treatment method for transporting a magnetic tape and a lapping tape relative to each other while causing them to make contact thereby to remove projections and adhered matter from a magnetic surface of the magnetic tape, said method comprising the steps of:
- blowing air onto the magnetic tape at a position where the magnetic tape and the lapping tape make contact to inhibit formation of an air gap between the tapes;
- and
- regulating with respect to each other a force of the blowing air, a tension of the magnetic tape on an entrance side on which it is let out, and a tension of the magnetic tape on an exit side on which it is taken up.
A magnetic tape surface treatment apparatus for rubbing a magnetic tape with a lapping tape and removing projections and adhered matter from a magnetic surface of the magnetic tape, said apparatus comprising:
- regulating means for regulating a tension of the magnetic tape;
- and
- pressurized air means for blowing air onto the tapes at a position where the magnetic tape and the lapping tape make contact to inhibit formation of an air gap between the tapes;
- said regulating means comprising controlling means for simultaneously feedback controlling a tension of the magnetic tape on an entrance side on which the magnetic tape is let out and a tension of the magnetic tape on an exit side on which the magnetic tape is taken up.
Dependencies are inferred from the claim text.