Recorders – Record receivers and/or driving means therefor – Disc
Patent
1996-09-11
1997-11-11
Cummings, Scott
Recorders
Record receivers and/or driving means therefor
Disc
277 3, 277 15, 277 80, F16J 1553
Patent
active
056869410
ABSTRACT:
There is provided an information recording apparatus having a vacuum system. The apparatus includes a vacuum chamber connected with a first evacuator device. An electronic beam producing device is partially enclosed in the vacuum chamber for emitting an electronic beam for recording information on a recording medium. A moving stage is provided in the vacuum chamber for linearly moving the recording medium in a vacuum atmosphere within the vacuum chamber. A spindle is disposed in the vacuum chamber for rotating the recording medium. The spindle is supported on an air bearing and is rotatably driven by a spindle motor. A magnetic fluid seal producing device is provided around the spindle close to the vacuum chamber side. A pressure differential chamber is provided around the spindle close to the air bearing side. The pressure differential chamber is connected with a second evacuator device.
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patent: 4407518 (1983-10-01), Moskowitz et al.
patent: 4844138 (1989-07-01), Kokubu
patent: 4898480 (1990-02-01), Raj et al.
patent: 5108715 (1992-04-01), Jekat et al.
patent: 5340122 (1994-08-01), Toboni et al.
Cummings Scott
Pioneer Electronic Corporation
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