Magnetic tape cassette with dust-excluding front cover - has front and rear flaps whose surfaces meet along contact face describing circular arc during opening

摘要

Upper and lower portions (12,14) of the cassette are screwed together leaving a frontal opening (16) sepd. by a partition (22) from the interior in which the tape (20) is wound between two reels (18) via small apertures (24) in the sides of both portions (12,14). Front and rear flaps (26,28) are pinned together (30) and have their faces (34,36) turned towards each other when the opening (16) is covered by the front flap (26). USE/ADVANTAGE - For video and audio recorder. With overlap between front and rear flaps reduced or eliminated, housing is closed more effectively and cassette held more securely.