Patent Number: 6,297,479

Title: Method and apparatus for drying or heat-treating products

Abstract: The invention relates to a method and an apparatus for drying or heat-treating substances or products at a pressure other than atmospheric pressure. The invention relates furthermore to banana chips dried by means of this method and banana powder produced therefrom. For drying or heat-treating, the products to be treated are loaded in transport receptacles which are subsequently charged via charging lock chambers into a treatment chamber and discharged therefrom via discharging lock chambers. For drying or heat-treating, at least one microwave source is provided in the treatment chamber. Furthermore an infrared heating source may be provided. After heat-treating or drying a resting period may be scheduled. More particularly for this purpose a vertically oriented conveying system is provided in the treatment chamber when a longish resting period is involved. The transport receptacle is configured dished and may comprise nets on which the products are applied. The method is employed preferably for drying or heat-treating basic food materials, e.g. for food products or medicinal drugs.

Inventors: Wefers; Michael (D-81929 Munich, DE)


International Classification: A23B 7/02 (20060101); A23L 1/212 (20060101); A23L 3/40 (20060101); A23L 3/54 (20060101); F26B 15/10 (20060101); F26B 5/04 (20060101); F26B 15/00 (20060101); A23B 007/01 (); A23L 003/01 (); F26B 021/10 (); F27B 009/04 (); H05B 006/78 ()

Expiration Date: 10/02/2018