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 filter assembly includes a casing having of a polymeric film and bounding a compartment, the casing having an inlet opening communicating with the compartment and a first outlet opening communicating with the compartment. A first filter includes a porous filter body through which gas can pass and has a pore size smaller than 1 m, the first filter being coupled with the casing so that the filter body is at least partially disposed within compartment of the casing and so that gas passing through the compartment of the casing from the inlet opening to the first outlet opening must pass through the filter body.

The system includes a cup, a lid, a stir, and one or more bags. The cup is configured to hold fluids. The lid includes a top portion and a bottom portion configured to couple to and cover an open portion of the cup. The stir includes a knob, a longitudinal shaft, and a distal shaft extending outwardly from the longitudinal shaft. The knob is disposed on the top portion of the lid and coupled to the longitudinal shaft threaded through the bottom portion of the lid. The one or more bags are coupled along the length of the longitudinal shaft.

Described is a stirrer of a machine for making and dispensing ice cream products, the stirrer rotating about an axis inside a mixing and cooling cylinder and comprising: a body defining a plurality of helical scraping blades extending around the axis and acting on an inside wall of the mixing and cooling cylinder to be scraped; a shaft for rotating the stirrer about the axis of rotation; a plurality of scraping members, each designed to be coupled to a blade and equipped with elastic coupling means for the blade adapted to be elastically deformed in order to allow it to be coupled to the blade.

A method for processing a fluid includes removably securing a retention member to a vessel that bounds a chamber; inserting a collapsible bag within the chamber of the vessel; securing the bag to the retention member so that the bag is supported within the chamber of the vessel; and dispensing a fluid into a compartment of the collapsible bag supported within the chamber of the vessel. The fluid can be mixed within bag while the bag is disposed within the vessel.

A device and apparatus for mixing and dispersing a solid and a liquid are provided. The device includes a powder pulverizing mechanism fixedly connected to a main shaft. The powder pulverizing mechanism is located in a powder feed chamber. The powder feed chamber is provided with a powder feed port. A liquid feed chamber is arranged on an outer side of the powder feed chamber. The liquid feed chamber is provided with a liquid feed port, and the liquid feed chamber is provided therein with a dispersing mechanism fixedly connected to the main shaft. A lower portion of the liquid feed chamber and a lower portion of the powder feed chamber are separately in communication with an upper portion of a mixing chamber. The mixing chamber is provided therein with an impeller fixedly connected to the main shaft.

A fluid mixing system includes a flexible bag having a first end, an opposing second end, and an interior surface bounding a compartment; a retainer coupled to the second end of the flexible bag, the retainer having a retention cavity formed thereon that communicates with the compartment of the flexible bag; and an elongated member having a first end rotatably coupled to the first end of the flexible bag and an opposing second end freely disposed within the retention cavity of the retainer so that the second end of the elongated member can rotate within the retention cavity relative to the retainer.

A fluid mixing system includes a flexible bag having a first end, an opposing second end, and an interior surface bounding a compartment; a retainer coupled to the second end of the flexible bag, the retainer having a retention cavity formed thereon that communicates with the compartment of the flexible bag; and an elongated member having a first end rotatably coupled to the first end of the flexible bag and an opposing second end freely disposed within the retention cavity of the retainer so that the second end of the elongated member can rotate within the retention cavity relative to the retainer.

The present invention concerns a mixing shaft comprising a tool holder and a mixing blade, wherein the tool holder has a recess in which a portion of the mixing blade is fixed. To provide a simple mixing shaft, there is proposed a clamping portion fitted into the recess for fixing the mixing blade portion in the recess, wherein the clamping portion, the recess and the mixing blade portion are of such a configuration that a force-locking connection of the mixing blade in the recess is implemented by means of the clamping portion.