Device for preventing sticking of a magnetic tape to a rotating magnetic head drum
AssigneeClarion Co., Ltd.
InventorsTetsuya Suzuki, Yukio Ito, Kiyoshi Zogo
Life of this patent
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Abstract
In a magnetic recording/reproducing apparatus of the helical scanning type the rotation speed of the reels in operation is detected and it is judged to be abnormal, if the rotation speed exceeds the upper limit thereof. This upper limit can be varied, depending on various operating modes. When an abnormality is detected, the brake of the reels is driven and the rotation of the drum is stopped. After the tape has been stopped, the tape is unloaded while rotating the supply side reel and the take-up side reel, the drum remaining not rotated.
Claims8
A tape protection device for use with a magnetic recording/reproducing apparatus of the helical scanning type, said player including take-up and supply reel drive means, a rotatably mounted magnetic drum head, means for rotating said supply reel, said take-up reel, and said head, and loading means for drawing a portion of magnetic tape from a cassette into engagement with said head, said device comprising:
- detecting means for providing a rate-indicating signal condition indicative of the rate of rotation of one of said reels;
- comparison means responsive to said detecting means for producing a head-stopping signal condition upon receipt of a rate-indicating signal condition indicative of a rate of reel rotation beyond a given value;
- and
- head-stopping means responsive to said detecting means for stopping the rotation of said head upon receipt of said head-stopping signal condition.
A tape protection device for use with a magnetic recording/reproducing apparatus of the helical scanning type, said player including take-up and supply reel drive means, a rotatably mounted magnetic drum head, means for rotating said supply reel, said take-up reel, and said head, and loading means for drawing a portion of magnetic tape from a cassette into engagement with said head, said device comprising:
- detecting means for providing a rate-indicating signal condition indicative of the rate of rotation of said supply reel;
- comparison means responsive to said detecting means for producing a head-stopping signal condition upon receipt of a rate-indicating signal condition indicative of a rate of supply reel rotation beyond a first given value during loading and beyond a second given value during play;
- and
- head-stopping means responsive to said detecting means for stopping the rotation of said head upon receipt of said head-stopping signal condition.
Dependencies are inferred from the claim text.