Stock material or miscellaneous articles – Structurally defined web or sheet – Edge feature
Patent
1990-09-04
1993-06-01
Thibodeau, Paul J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Edge feature
428178, 428412, 428913, 430945, 346 76L, 3461351, B32B 2302
Patent
active
052158080
ABSTRACT:
An optical tape recording medium is provided with a transparent flexible membrane which covers the recording surface of the tape and is bonded to its edges so as to trap a small bubble of fluid, e.g., gas or liquid. During recording, the trapped bubble displaces dust particles resting on the film's upper surface to a location out of the zone of focus of a read/write beam. As the tape is longitudinally transported, the trapped bubble is held stationary at the read/write station of the recording apparatus. In a tape cassette, the optically writable tape is wound around two reels with sufficient tension to trap the bubble in that portion of the tape stretched between the supply and take-up reels. In one embodiment of the invention, the bubble contains a transparent magnetic liquid which can be properly positioned by a magnet when the cassette is first inserted into an optical recording or playback apparatus. The invention is generally useful with any optically writable media, including optical and magneto-optical write/read media.
REFERENCES:
patent: 5006422 (1991-04-01), Sakurai et al.
Eastman Kodak Company
Follett R.
Holloway William W.
Thibodeau Paul J.
LandOfFree
Optical tape recording media with integral dust-defocusing trans does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical tape recording media with integral dust-defocusing trans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical tape recording media with integral dust-defocusing trans will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1813224