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US 3,977,091 AGranted
Tempering and sterilizing device
AssigneeHoechst Aktiengesellschaft
InventorsHans-Peter Hortig, Hans Pfeiffer
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AssigneeHoechst Aktiengesellschaft
InventorsHans-Peter Hortig, Hans Pfeiffer
Estimating the term…
A device for tempering and/or sterilizing objects which must be kept free of contamination by foreign particles, such as for example, ampules sterilized in pharmaceutical preparations, has a housing and means for supporting the objects in the housing. A pair of gas distribution plates are mounted in the housing in spaced relationship to each other, on either side of the support means, and cooperate with means for supplying conditioned air to produce a laminar flow of the conditioned air downwardly over the objects being treated. The conditioned air has a substantially different temperature than the objects being treated and can be either heated or cooled depending upon whether the device is used for sterilizing or tempering. Because of the maintenance of laminar flow in the housing, the number of contaminating particles per space unit which can come into contact with the objects being treated is decreased.
A device for tempering objects which are to be kept free from contamination by foreign particles which comprises, a housing, means for supporting said objects in said housing, a first gas distribution plate mounted in said housing above said supporting means and having a plurality of relatively small apertures therein, a second gas distribution plate mounted in said housing, below and in spaced relation to said supporting means and having a plurality of relatively small apertures therein, said first and second plates cooperating to define a work space in said housing about the objects to be treated on said supporting means, means for supplying conditioned air to said housing at the side of said first plate remote from said supporting means at sufficient pressure for said conditioned air to flow into said work space, said conditioned air having a substantially different temperature than said objects, and said first and second plates providing a predetermined pressure drop between their opposite faces to produce a laminar flow of conditioned air downwardly from said first plate over the objects on said supporting means through said supporting means and second plate for discharge from said housing;
A device for sterilizing objects which are to be kept free from contamination by foreign particles which comprises, a housing, means for supporting said objects in said housing, a first gas distribution plate mounted in said housing above said supporting means and having a plurality of relatively small apertures therein, a second gas distribution plate mounted in said housing, below and in spaced relation to said supporting means and having a plurality of relatively small apertures therein, said first and second plates cooperating to define a work space in said housing about the objects to be treated on said supporting means, means for supplying conditioned air to said housing at the side of said first plate remote from said supporting means at sufficient pressure for said conditioned air to flow into said work space, said conditioned air having a substantially different temperature than said objects, and said first and second plates providing a predetermined pressure drop between their opposite faces to produce a laminar flow of conditioned air downwardly from said first plate over the objects on said supporting means through said supporting means and second plate for discharge from said housing;
Dependencies are inferred from the claim text.