A method for filtering a gas includes passing a gas into a compartment of a casing that includes a polymeric film, the casing having: a first sleeve having a first outlet opening, a first filter being at least partially disposed within the first sleeve so that gas passing through the first sleeve must pass through the first filter; and a second sleeve having an second outlet opening, a second filter being at least partially disposed within the second sleeve so that gas passing through the second sleeve must pass through the second filter, the second sleeve being closed so that the gas passing into the compartment of the casing passes through the first sleeve and the first filter and directly contacts at least a portion of the first sleeve comprised of the polymeric film but does not pass through the second sleeve. Opening the second sleeve when a predetermined condition is met so that the gas passes through the second sleeve and the second filter.

A method for filtering a gas includes passing a gas into a compartment of a casing that includes a polymeric film, the casing having: a first sleeve having a first outlet opening, a first filter being at least partially disposed within the first sleeve so that gas passing through the first sleeve must pass through the first filter; and a second sleeve having an second outlet opening, a second filter being at least partially disposed within the second sleeve so that gas passing through the second sleeve must pass through the second filter, the second sleeve being closed so that the gas passing into the compartment of the casing passes through the first sleeve and the first filter and directly contacts at least a portion of the first sleeve comprised of the polymeric film but does not pass through the second sleeve. Opening the second sleeve when a predetermined condition is met so that the gas passes through the second sleeve and the second filter.

A mixer for combining food constituents into a homogeneous mass includes an eccentric drive mounted on a mixing head of the mixer, where the eccentric drive is configured to rotate around a central axis of a mixing area and rotate an offset rotational axis of a drive shaft in an orbit about the central axis of the mixing area. An angled beater attachment for the mixer further includes a top mounting portion operably coupled to the drive shaft of the stand mixer, a bottom beater portion disposed above the mixing area, and a beater support member operably coupled with a support shaft of the bottom beater portion. The bottom beater portion is driven by the drive shaft about an angled rotational axis that extends at an acute angle relative to the central axis of the mixing area.

A mixer for combining food constituents into a homogeneous mass includes an eccentric drive mounted on a mixing head of the mixer, where the eccentric drive is configured to rotate around a central axis of a mixing area and rotate an offset rotational axis of a drive shaft in an orbit about the central axis of the mixing area. An angled beater attachment for the mixer further includes a top mounting portion operably coupled to the drive shaft of the stand mixer, a bottom beater portion disposed above the mixing area, and a beater support member operably coupled with a support shaft of the bottom beater portion. The bottom beater portion is driven by the drive shaft about an angled rotational axis that extends at an acute angle relative to the central axis of the mixing area.

The present disclosure provides advantageous rotary interfaces for fluid assemblies (e.g., rotary interfaces for fluid flow in bioreactor applications), and related methods of fabrication and use. More particularly, the present disclosure provides improved rotary interfaces for fluid flow through porous impellers for filtration and/or sparging for fluid assemblies (e.g., bioreactor applications), and related methods of fabrication and use. Disclosed herein is a fluid assembly (e.g., bioreactor) that includes a porous impeller which is in fluid communication with a hollow shaft that can be used to transport a reaction fluid to an external storage tank or the like. The fluid assembly/bioreactor can include a coupling mechanism that transmits rotary motion from a motor to a primary shaft and then to a hollow secondary shaft, while at the same time permitting removal of a filtrate from the fluid assembly or bioreactor via the hollow secondary shaft and a porous impeller.

The present disclosure provides advantageous rotary interfaces for fluid assemblies (e.g., rotary interfaces for fluid flow in bioreactor applications), and related methods of fabrication and use. More particularly, the present disclosure provides improved rotary interfaces for fluid flow through porous impellers for filtration and/or sparging for fluid assemblies (e.g., bioreactor applications), and related methods of fabrication and use. Disclosed herein is a fluid assembly (e.g., bioreactor) that includes a porous impeller which is in fluid communication with a hollow shaft that can be used to transport a reaction fluid to an external storage tank or the like. The fluid assembly/bioreactor can include a coupling mechanism that transmits rotary motion from a motor to a primary shaft and then to a hollow secondary shaft, while at the same time permitting removal of a filtrate from the fluid assembly or bioreactor via the hollow secondary shaft and a porous impeller.

A bag assembly for use with a heat exchanger includes a flexible bag having of one or more sheets of polymeric material, the bag having a first end that bounds a first compartment and an opposing second end that bounds a second compartment, a support structure being disposed between the first compartment and the second compartment so that the first compartment is separated and isolated from the second compartment. A first inlet port, a first outlet port, and a first drain port are coupled with the flexible bag so as to communicate with the first compartment. A second inlet port, a second outlet port, and a second drain port are coupled with the flexible bag so as to communicate with the second compartment.

A bag assembly for use with a heat exchanger includes a flexible bag having of one or more sheets of polymeric material, the bag having a first end that bounds a first compartment and an opposing second end that bounds a second compartment, a support structure being disposed between the first compartment and the second compartment so that the first compartment is separated and isolated from the second compartment. A first inlet port, a first outlet port, and a first drain port are coupled with the flexible bag so as to communicate with the first compartment. A second inlet port, a second outlet port, and a second drain port are coupled with the flexible bag so as to communicate with the second compartment.

A method for filtering a gas comprises passing a gas through a compartment of a filter assembly, the filter assembly comprising: an inlet opening; a first outlet opening; a casing comprising polymeric film and bounding the compartment, the compartment communicating with the inlet opening and the first outlet opening; and a first filter at least partially disposed within the compartment. The method further comprising forming a first seal across a first section of the casing at a location between the inlet opening and the first filter to form a first sub-compartment within the casing and severing the casing at a first location.

A method for filtering a gas comprises passing a gas through a compartment of a filter assembly, the filter assembly comprising: an inlet opening; a first outlet opening; a casing comprising polymeric film and bounding the compartment, the compartment communicating with the inlet opening and the first outlet opening; and a first filter at least partially disposed within the compartment. The method further comprising forming a first seal across a first section of the casing at a location between the inlet opening and the first filter to form a first sub-compartment within the casing and severing the casing at a first location.