Patent ID: 6712303
Filing Date: 2004-03-30
Classification: G11B

Abstract:
A magnetic tape cartridge comprising a cartridge casing formed by upper and lower casing halves mated together, a single reel which is housed in the cartridge casing for rotation and around which a magnetic tape is wound, a leader pin which is fixed to the leading end of the magnetic tape in order to draw out the magnetic tape from the cartridge casing, a lock member which is adapted to removably hold opposite ends of the leader pin inside an opening of the cartridge casing, and a sliding door for opening and closing the opening,wherein a coiled spring member extends through the sliding passage of the sliding door and a hole extending from the sliding passage in the direction in which the sliding door is opened along the mating surfaces of the upper and lower casing halves, and a plug is inserted into the hole to push the end of the coiled spring member remote from the sliding door so that the coiled spring urges the sliding door to its closing position.