Eisai Company, Limited

Micro Denshi Co., Ltd.

Kenichi Iijima

Minoru Kudo

Toshiyasu Ehara

Washiro Honda

Katsumi Shimizu

In the microwave oven of square waveguide type or coaxial tube type, the waveguide or inner conductor of the tube type is gradually declined from the inlet toward the outlet of the oven. A top slot is provided so that containers may be moved along the slot with their bottom portions being received in the oven and the contents heat sterilized. There is laid on a bottom surface of the oven a support rail for the bottoms of the containers, and this rail is gradually thickened from the inlet toward the outlet. More preferably, two or more such microwave ovens may be serially connected and the containers may be moved therethrough to heat sterilize medical fluids within each container in a stepwise manner.

Sterilizer for sealed container utilizing microwave

An irradiator furnace is connected to a square waveguide for propagation of microwaves and provided through a top wall with a slot. A conveyor bucket conveys sealed containers along the slot with lower portions of the sealed containers being inserted through the slot into the irradiator furnace. The irradiator furnace includes therein a rail which extends from a lower level of the furnace thereof at the inlet thereof to a higher level of the furnace at the outlet so as to support the sealed containers in a vertical direction. A hot air furnace is provided above the irradiator furnace. A narrow passage extending from the outlet of the irradiator furnace is directly followed by a thermostatic station utilizing an IR heater. So the sealed containers are sterilized.

Method and apparatus for sterilizing sealed containers utilizing

A rectangular waveguide is provided in communication with a microwave generator, and an irradiation furnace formed in its top wall with a slot is provided in communication with the rectangular waveguide. Ampules having only lower portions inserted through the slot into the irradiation furnace are transported by conveyor means along the slot. A depth of the irradiation furnace and/or a distance between the ampules and a surface of the slot may be adjusted to control sterilizing effect for medical fluid filling the ampule.

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Isezaki, Japan

Kenichi Iijima