Freeze Drying Bacteria for Preservation

Jeremy Carson carsonj at
Tue Jul 11 07:38:22 EST 1995

For the freeze drying of bacteria, Edwards High Vacuum in England used to make
a device to automatically constrict the glass ampoules prior to final drying
and sealing under vacuum. Unfortunately they no longer make the device. I
believe it consisted of a small electric motor to turn the ampoule and a gas
jet to melt the glass. We constrict our ampoules by hand which is very time

Does anyone know of a manufacturer of an automatic or semi-automatic device for
constricting glass ampoules?

Thank you for any assistance.

Jeremy Carson

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