A - Human Necessities – 21 – D
Patent
A - Human Necessities
21
D
99/119, 99/122
A21D 13/00 (2006.01) A21D 15/02 (2006.01)
Patent
CA 1059823
METHOD AND APPARATUS FOR REDUCING THE TEMPERATURE OF BAKERY PRODUCTS Abstract of the Disclosure Method for reducing the temperature of bakery products immediately after the discharge thereof from the oven, by means of vacuum. The bakery products are first subjected to a substantially linear pressure reduction as a function of time at a rate of not more than 60 mm Hg per second through at least half of the total pressure drop employed. The pressure reduction rate is then allowed to increase substantially for terminating vacuum treatment. Apparatus for carrying out the method comprises at least one vacuum chamber adapted to be connected to a source of vacuum through a vacuum conduit and a valve, and a closeable opening for bringing bakery products into and out of the chamber. In the vacuum conduit in parallel to a servo-valve serving to applying full vacuum effect from the source of vacuum during said remaining portion of the total pressure drop, there is inserted a by-pass conduit having a permanently open flow cross-section adjusted to give said substantially linear pressure reduction.
220292
Knutrud Leif B.
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