Patent ID: 6455815
Filing Date: 2002-09-24
Classification: F27B,F27M

Abstract:
A magnetic annealing oven comprising:a) a vacuum chamber formed of non-magnetic material and having a vacuum port with a vacuum seal through which magnetic media may be loaded and unloaded; b) a heat exchanger formed of non-magnetic material and supported in the vacuum chamber, the heat exchanger having a first compartment having an opening for receiving magnetic media to be treated in the oven, and a second compartment in thermally conductive relationship with the first compartment, the second compartment having an airtight volume hermetically sealed from the first compartment and the vacuum chamber, and the heat exchanger being spaced from said vacuum port so as to avoid heating of the vacuum seal to seal-damaging temperatures; c) heat transfer conduits hermetically sealed from the vacuum chamber and the first compartment for circulating a heat transfer gas to and from the second compartment, and d) an exterior magnet positioned to induce a magnetic field in magnetic media disposed in the heat exchanger.