| 摘要 |
1,196,300. Freeze - drying apparatus. NESTLE'S PRODUCTS Ltd. 1 Dec., 1969 [23 Dec., 1966], No. 52921/69. Divided out of 1,196,299. Heading F4G. A freeze-drying apparatus comprises an elongated vacuum chamber comprising a fixed hood 20 connected to a vibrating elongated ribbed tray 23 by flexible seals 29, the tray being mounted on supports 24 supported on springs 25 and vibrated by a pneumatically or electromagnetically operated vibrator 27. The apparatus comprises heating pipes 30, gas or oil burners or electric heaters. The chamber has a vapour outlet connected to condenser(s) 21. The chamber comprises a filter 35 for removing fine particles from the sublimed vapours. The filter 35 comprising one or more parts, is connected to perforated chassis 36 supported by vibrator 37. The filter is connected to tray 23 by flexible seals 38. In use, material is fed into one end of the chamber through an airlock and discharged at the other end through an airlock. |
