Method and apparatus for fumigation of materials

Apparatus for fumigating material with a fumigant agent in gas or vapour form, which comprises a flexible enclosure device within which the material may be totally enclosed and sealed, the enclosure device having a port and, connectable to the port, means, including a pump, for transmitting gas or vapour to an outlet remote from the device, the pump comprising a chamber for containing a heat reservoir of particulate matter and being capable, in operation, of causing the agent to impinge on the particulate matter and of pumping gas or vapour to and from the enclosure device through said port.

Fumigation apparatus which comprises an enclosure device capable of totally enclosing and sealing an article to be fumigated, the device comprising flexible substantially gas and vapour-impermeable base and cover sheet joined by a substantially gas and vapour-impermeable sliding clasp fastener, the interior of the device being connected by a port to an outlet of a pump, the pump having an inlet chamber for containing a heat reservoir of particulate matter, means for introducing a fumigant into the chamber to impinge on particulate matter therein, and an air inlet to the chamber, whereby a mixture of air and fumigant may be introduced into the device.

Fumigation apparatus, which comprises an enclosure device capable of totally enclosing and sealing an article to be fumigated, the device comprising flexible substantially gas- and vapour-impermeable base and cover sheets joined by a substantially gas- and vapour-impermeable sliding clasp fastener, the device having a first port and a second port, and a pump having an inlet and an outlet, the first port being connected by an inlet line to the inlet of the pump and the second port being connected by an outlet line to the outlet of the pump, whereby air may be circulated by the pump in a path into and out of the enclosure and through the pump, a desiccant being provided in the circulation path.

A pump having a housing, a first inlet and an outlet, and a second inlet connected to means, outside the pump housing, for supplying a gas or vapour to a chamber in the pump, the chamber also containing a heat reservoir of particulate matter, the second inlet being arranged to direct the gas or vapour toward the heat reservoir.

Apparatus for treating material with a fumigating agent in gas or vapour form, which comprises an enclosure device within which the material may be totally enclosed and sealed, the enclosure device having first and second ports and, connectable to the ports, means, including a pump, for transmitting gas or vapour to an outlet remote from the device, the pump comprising a chamber for containing a heat reservoir of particulate matter and being capable, in operation, of causing the agent to impinge on the particulate matter and of pumping gas or vapour to the enclosure device through said first port and from the enclosure device through said second port.