Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1993-11-19
1995-05-30
Sluby, P. C.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428490, 428910, 428694ST, 428694B, 428694SL, B32B 3300, G11B 5704
Patent
active
054199611
ABSTRACT:
The present invention provides a magnetic recording medium such as a magnetic tape suitable for long play with the thickness of the magnetic tape bring less than or equal to 12.5 without degrading the electro-magnetic conversion characteristic of the head-tape contact characteristic of the magnetic tape. The magnetic tape comprises a non-magnetic film base of thickness dA and a magnetic layer on the non-magnetic film base of thickness dM with the ratio of dA/dM.ltoreq.3.6 and a cupping rate defined as a ratio (A/B.times.100%) of a height A of a curled tape to a width B of curled tape in the traversing direction of .ltoreq.10%. The non-magnetic film vase has a first Young's modulus Y(MD) is a longitudinal direction of the magnetic recording medium and a second Young's modulus Y(TD) in a traversing direction thereof, wherein the first and second Young's modulusli y(MD) and Y(TD) respectively satisfy inequalities (1), (2) defined as follows:
REFERENCES:
patent: 5196265 (1993-03-01), Ryoke et al.
Deno Takayuki
Kobayashi Osamu
Matsumoto Ikuo
Abraham David
Meller Michael N.
Sluby P. C.
Victor Company of Japan Ltd.
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