Magnetic tape cassette

Claim 1

In a tape cassette including a rotatably mounted core having a cylindrical surface for supporting tape wound thereon, and a guide member defining the path of tape to the outer convolution of tape on the core, tape guiding and tensioning means comprising: a. a brake arm having one end pivotally mounted adjacent said guide member and having on the opposite end means defining a brake surface adapted to engage the outer convolution of tape on the core at substantially the same tangent point at which tape is directed onto said outer convolution from said guide member; b. means for resiliently biasing said brake surface into engagement with tape wound on the core, said bias means including means defining a bearing surface and a resilient arm attached to said brake arm and extending into resilient sliding engagement against said bearing surface, said resilient arm being attached to said brake arm nearer to the brake surface end than the pivot axis end and extending from the brake arm at an acute angle generally toward said pivot axis; and c. guide means on said brake arm defining a pair of guide surfaces for guiding the tape edges to maintain alignment of the tape with the convolutions of tape wound on said core.