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US 3,936,952 AGranted
Apparatus for freeze-drying
AssigneeKrauss-Maffei Aktiengesellschaft
InventorJorg Schimpfle
Life of this patent
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Abstract
A freeze-dryer, especially for comestibles such as coffee extract, is connected to a condenser with a dust separator interposed therebetween. The discharge opening of the dust separator communicates with an after-drying device with its own discharge arrangement for the freeze-dried dust. The vapor produced in the freeze-dryer is introduced into a passage connecting the main dryer with the dust separator.
Claims10
An apparatus for the freeze-drying of a product comprising, in combination:
- a main dryer adapted to receive a frozen product and provided with means for heating said frozen product in vacuo to release vapor from said product and form a freeze-dried granulate therefrom;
- a dust separator communicating with said dryer for separating dust from the vapor emerging therefrom;
- a condenser connected to said dust separator for condensing the vapor upon separation of dust therefrom;
- an after-dryer connected to said dust separator for receiving separated dust therefrom and drying said separated dust independently of said granulate;
- and
- discharge means connected to said after-dryer and operable independently of the main dryer for discharging the dry dust from the apparatus as a product separate from said granulate.
3 more elements
Dependencies are inferred from the claim text.