Freeze drying apparatus with inflatable platen contact heating

• US 3,199,217 A
• Filed: 03/28/1962
• Issued: 08/10/1965
• Est. Priority Date: 03/28/1962
• Status: Expired due to Term

• Current Assignee: Henry A. Oldenkamp, Robert F. Small
• Original Assignee: Henry A. Oldenkamp, Robert F. Small
• Inventors: Oldenkamp, Henry A., Small, Robert F.
• Application Number:
  US04/183,213
• Time in Patent Office: 1,231 Days
• US Class Current: 34/92
• CPC Class Codes: A23L 3/44 Freeze-drying
• CPC Class Codes: F26B 5/06 the process involving freezing

Claims

1. APPARATUS FOR SUBLIMING THE ICE IN FROZEN PRODUCTS COMPRISING A VACUUM CHAMBER, MEANS FOR MAINTAINING THE VAPOR PRESSURE IN SAID CHAMBER BELOW THE TRIPLE POINT PRESSURE OF WATER, PRODUCT HEATING MEANS IN SAID CHAMBER FOR CONDUCTING HEAT TO THE LOWER AND UPPER SURFACES OF THE PRODUCT, SAID PRODUCT HEATING MEANS COMPRISING LOWER AND UPPER SPACED HOLLOW INFLATABLE PLATEN,S CORRUGATED MEMBERS ON OPPOSED FACES OF SAID PLATENS FOR ENGAGING THE PRODUCT AND CONDUCTING HEAT THERETO WHILE PROVIDING FOR VAPOR ESCAPE, ONE OF SAID PLATENS HAVING A FLEXIBLE WALL, MEANS FOR SUPPORTING THE PLATENS IN SAID CHAMBER, LIQUID SUPPLY MEANS FOR DIRECTING HEATED LIQUID TO SAID PLATENS AT A PRESSURE SUFFICIENT TO FLEX THE FLEXIBLE