Method for defrosting logs and a defrosting apparatus
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United States of America Patent
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Feb 11, 2003
Grant Date -
Jan 16, 2003
app pub date -
Jul 5, 2001
filing date -
Jun 29, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention concerns a method and an apparatus for defrosting frozen wood prior to debarking. The defrosting method of logs of the invention is based on bringing heat zone-specifically to logs in transfer motion on a conveyor according to their heat receiving capacity immediately from the moment of starting of the defrosting, and at the end of the defrosting process, the heat volume per time unit, supplied at a higher temperature, is only a part of the heat volume of the starting phase of the defrosting process. For instance, it is possible to spray water on the wood to be defrosted so that the row interval of the showers in the initial part of the piping is a fraction of the row Interval in the tail end of the piping. In the tall end of the defrosting conveyor steam can also be supplied.
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