Closed system and container for dust free loading and unloading of powdered materials
AssigneeSemi-Bulk Systems, Inc.
InventorCharles S. Alack
Life of this patent
Estimating the term…
Abstract
A closed system for filling a container with a load of powdered, granular, or other dry fluent material and for unloading the load substantially without the emission of dust to the atmosphere. The container has an opening in its top which may be sealingly secured to a filling head during during filling and closed by a removable cover. The filling head is connected to a dust receiver for removing dust laden air displaced from within the container as the load is delivered to the container. The container used with this system may be adapted for fluidized unloading of the powder substantially without the release of dust.
Claims26
A closed system for filling a container with a load of powdered or granular fluent material substantially to prevent the escape of dust during filling of the container, said container having an opening at its top, said opening being defined by a substantially rigid collar, said collar having a sleeve, the upper portion of said container being secured to said sleeve in sealed relation, said system further comprising delivery means comprising filling means for delivery of said fluent material through the opening into said container and means for removing air from within said container displaced upon filling of the container substantially without the emission of dust to the atmosphere, said delivery means further comprising a delivery head including a first conduit that communicates with the filling means and a second conduit that communicates with the air removing means, and means for releasably securing said collar to said delivery means during filling, said delivery head engaging said collar in sealed relation, and both said first and second conduits being in communication with the interior of the container through the opening therein when said collar is secured to said delivery means.
A closed system for filling a container with a load of powdered or granular fluent material, and for unloading the load from the container substantially without the escape of dust, said system comprising a container defining an enclosed volume for containing said load and being adapted for the pneumatic or fluidized unloading of the powdered load, an opening at the top of the container in communication with said volume, a porous diaphragm within the container at the bottom thereof defining the bottom of said volume, a plenum chamber between said diaphragm and the bottom of said container, an inlet in said container for the introduction of compressed gas into said plenum chamber, said gas permeating through said diaphragm so as to fluidize said fluent material, an outlet in said container for the discharge of fluidized material from the container, said opening at the top of the container being defined by a substantially rigid collar, said system further comprising delivery means comprising a delivery head that is adapted to be secured to said collar in sealed relation, said delivery means further comprising means communicating with said head for filling said container through said opening therein with said fluent material and for removing air through said opening therein from within said container displaced upon filling of the container substantially without the emission of dust, and means adapted for communication with said volume for venting said volume during fluidization of said load and for maintaining the pressure within said volume within a predetermined pressure range during unloading substantially without the emission of dust.
A closed system for filling a container with a load of powdered or granular fluent material, and for unloading the load from the container substantially without the escape of dust, said system comprising a container adapted for receiving and containing said load and for fluidized unloading of said load, said container including a substantially rigid base, a bag of flexible sheet material sealably secured to said base for containing said load, a porous diaphragm in said container overlying said base and constituting the bottom of said bag, a plenum chamber between said diaphragm and said base, an inlet for the introduction of compressed gas into said plenum chamber, said compressed gas permeating through said diaphragm and fluidizing said load, an outlet in said container for the discharge of fluidized material, an opening in the top of the bag in communication with said bag, said opening being defined by a substantially rigid collar secured to said bag in sealed relation, said system further comprising delivery means comprising means for filling said container with said fluent material and means for removing dust and air from within said container displaced during filling, said delivery means further comprising a delivery head adapted to engage said collar in sealed relation, said head having a conduit therein in communication with the filling means for the delivery of said fluent material through said opening in said bag, said head being adapted to be operably connected to said air and dust removing means for controlling dust in the displaced air, said system further comprising a scale for weighing the fluent material delivered into the container during filling, said scale including means attachable to the bag for supporting the bag in an erect position with its collar secured to said head in sealed relation during filling.
A container into which a load of powdered granular, or other fluent material may be readily loaded and from which said load may be readily unloaded substantially without the escape of dust, said container comprising a substantially rigid base, a flexible wall bag secured to said base in sealed relation defining a volume for containing said load, a porous diaphragm in said container overlying said base and substantially constituting the bottom of said volume, a plenum chamber between said diaphragm and said base, an inlet for the introduction of compressed gas into said plenum chamber, said compressed gas permeating through said diaphragm and fluidizing said load, an outlet in said container for the discharge of fluidized material, an opening in the top of the bag in communication with said volume through which said load is delivered into said container during filling, said opening being defined by a substantially rigid collar secured to said bag in sealed relation, and a cover removably securable to said collar in sealed relation for closing said opening after the filling operation is completed.
Dependencies are inferred from the claim text.