US 9,812,167 B2
Magnetic tape cartridge
Yosuke Sumiya, Kanagawa (JP); and Katsuki Asano, Kanagawa (JP)
Assigned to FUJIFILM CORPORATION, Tokyo (JP)
Filed by FUJIFILM CORPORATION, Minato-ku, Tokyo (JP)
Filed on Dec. 2, 2016, as Appl. No. 15/367,192.
Claims priority of application No. 2016-068490 (JP), filed on Mar. 30, 2016.
Prior Publication US 2017/0287526 A1, Oct. 5, 2017
Int. Cl. G11B 23/107 (2006.01); G11B 23/04 (2006.01)
CPC G11B 23/107 (2013.01) [G11B 23/042 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A magnetic tape cartridge comprising:
a case that is substantially rectangular box shaped and that houses, inside a housing area, a single reel wound with a magnetic tape and equipped with a reel plate that is attracted and held by magnetic force when loaded into a drive device; and
a metal-containing block that is disposed inside the case and outside the housing area of the reel, and has a proportion of metal by mass to a total mass of metal provided inside the case including the reel equipped with the magnetic tape and the reel plate of 18% or greater; wherein
metal particles of an iron-based metal, an iron cobalt metal alloy, a stainless steel, or nickel are contained in a mistaken-erasure prevention member made of resin that is provided to the case.