Method of manufacturing magnetic tape
View Patent ↗When a magnetic tape material is slit into a plurality of magnetic tapes, projections are formed in edge portions of side surfaces of the magnetic tapes. The projections are removed by pressing cutting tools against the edge portions of the side surfaces of the magnetic tape while transporting the magnetic tape. Thus, product quality of the magnetic tape is improved.
1. A method of manufacturing magnetic tape, comprising the steps of:
slitting a magnetic tape material by a slitter;
transporting a magnetic tape made by slitting the magnetic tape material by the slitter; and
pressing a cutting tool against a corner of an edge portion of a side surface of the transported magnetic tape after the slitting, thereby removing a projection formed in the corner of the edge portion of the side surface of the magnetic tape due to the slitting,
wherein the cutting tool is a blade which is separately provided from the slitter.
2. The method as defined in claim 1 , wherein the cutting tool to remove the projection on a magnetic layer of the magnetic tape is a rotary circular blade rotating on an axis substantially parallel to a running direction of the transported magnetic tape.
3. The method as defined in claim 1 , wherein the cutting tool to remove the projection on a nonmagnetic backing layer of the magnetic tape is a fixed blade made of a hard material.
4. The method as defined in claim 1 , wherein the cutting tool scrapes the edge portion of the side surface of the magnetic tape.
5. The method as defined in claim 1 , wherein the cutting tool to remove the projection on a magnetic layer of the magnetic tape is a rotary circular blade and a direction of a tangential velocity of the rotary circular blade at a point of contact between the rotary circular blade and the magnetic tape is not parallel to a conveying direction of the magnetic tape at the point of contact.
6. The method as defined in claim 3 , wherein fixed blade is disposed against the edge portion of the side surface so that the fixed blade is not parallel to a width of the magnetic tape, the width of the magnetic tape being substantially perpendicular to the running direction.
7. The method as defined in claim 1 , wherein the cutting tool removes the projection by applying a shearing force against the projection in a direction substantially parallel to a conveying direction of the magnetic tape at a point of contact with the cutting tool.