Tape medium running device

Details Tape medium running device Tape medium running device

2005-02-08

2005-02-08

Rivera, William A. (Department: 3654)

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Carrier speed or tension control

Reexamination Certificate

active

06851639

ABSTRACT:
A tape medium running device which can more correctly detect erroneous detection of a winding diameter, prevent an approach from being made to the end of the magnetic recording tape at high running speed and causing a damage on the tape, and can shorten fast forwarding/rewinding time. In this device, a winding diameter change detecting unit detects a change in winding diameter, and a ratio of a detected change in diameter and a maximum value of changes in winding diameter having been detected previously is compared with a predetermined winding diameter change comparison reference to detect abnormality. Thus, it is possible to prevent any approach from being made to the end of the magnetic recording tape at a high running speed based on an erroneous detection to causing a damage on the tape, and to shorten time for fast forwarding and rewinding.

REFERENCES:
patent: 4553182 (1985-11-01), Narita
patent: 5330118 (1994-07-01), Yoshikawa
patent: 5400980 (1995-03-01), Yoshikawa
patent: 5600504 (1997-02-01), Seo
patent: 5808824 (1998-09-01), Kaniwa et al.
patent: 6079652 (2000-06-01), Akitaya
patent: 6193183 (2001-02-01), Yoshizawa

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