Tape tension control apparatus for video cassette recorder

Details Tape tension control apparatus for video cassette recorder Tape tension control apparatus for video cassette recorder

1994-02-02

1995-10-24

Nguyen, John Q.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Carrier speed or tension control

2424217, 242422, 2424228, 360 85, G11B 1543, B65H 2308

Patent

active

054603340

ABSTRACT:
A tape tension control apparatus for a VCR capable of variously and precisely controlling the tension of a tape in accordance with the using purpose by sensing the tension of a tape by sensing device such as a photosensor or a Hall sensor, driving tension member driving device, based on a sensing signal from the sensing device, thereby electrically controlling the tension of the tape. The apparatus includes a tension sensing unit for sensing the tension of a tape, a tension member partially received in an annular groove formed on a peripheral surface of the supply reel of a tape cassette and adapted to apply a variable frictional force to the supply reel, a tension member driving unit operatively connected to the tension member to control the tension member and thereby control the variable frictional force applied to the supply reel in accordance with a sensing signal from the tension sensing unit, and an electrical control unit adapted to control the tension member driving device in accordance with the sensing signal from the tension sensing device.

REFERENCES:
patent: 4614315 (1986-09-01), Gerrits et al.

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