Tinted tape cassette having an optical tape sensing construction

Details Tinted tape cassette having an optical tape sensing construction Tinted tape cassette having an optical tape sensing construction

1984-07-23

1988-04-26

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record medium

In container

242198, G11B 578, G11B 2302, G11B 2304, G03B 104

Patent

active

047408570

ABSTRACT:
A colorful and aesthetically desirable tape cassette constructed to allow a tape end sensing device, which is built in an audio or video tape recording and playback apparatus, to optically sense an end of a magnetic tape with accuracy and without malfunctions. A housing of the tape cassette shows transmittance lower than 0.05 percent at a thickness of 0.05 millimeter and reflectivity lower than about 7 percent for wavelengths of 400-1100 nanometers. Transparent windows through which one can see the tape inside the cassette are made of a transparent material containing an agent which is absorptive for near-infrared rays in the wavelength range of 400-1100 nanometers.

REFERENCES:
patent: 4032987 (1977-06-01), Singer et al.
patent: 4072995 (1978-02-01), Sato
patent: 4343024 (1982-08-01), Kawai
patent: 4363059 (1982-12-01), Matsuzawa et al.
patent: 4452408 (1984-06-01), Sasaki
patent: 4484248 (1984-11-01), Ogiro et al.
patent: 4530475 (1985-07-01), Buerkle et al.

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