Container for use in treatment of liquid

Claim 2

A container for use in treatment of liquid, particularly in centrifugal separation of liquid into fractions of different densities, comprising walls of flexible sheet material, the walls defining between them a closed annular compartment for holding a discrete quantity of liquid, said walls further defining a central area located radially inwardly of the inner edge of the compartment, said central area being fixed with respect to the compartment, the walls forming said central area further defining a collapsible conduit through which liquid may be conveyed into or out of the container compartment, said conduit being integrally connected with central area and hence also with the container walls so as to be fixed relative to the walls, one end of the conduit connected to the interior of the compartment, the conduit extending from said one end within the central area to a further open end also within the central area for communication with a further fluid transporting means the fixed section of the conduit thus being disposed and arranged to serve as the liquid conveying member of peristaltic pump.

Claim 3

A container as set forth in claim 1 in which the conduit is defined by heat seals joining the walls.

Claim 4

A container as set forth in claim 1 in which a connecting tube is attached to one of the walls and communicates with the conduit.

Claim 5

A container as set forth in claim 1 in which the walls are generally circular and include an upper wall, a central wall and a lower wall, the upper and central walls defining between them a first generally annular compartment and a first conduit communicating at one end thereof with the first compartment and at the other end with a connecting tube secured to the upper wall, the central and lower walls defining between them a second generally annular compartment and a second conduit communicating at one end thereof with the second compartment and at the other end with the connecting tube, portions of the first and second conduits extending along portions of respective ones of two concentric circles and being adapted to cooperate with respective ones of two concentric rotors of a peristaltic pump to pass liquid into and out of the compartments.

Claim 6

A container as set forth in claim 1 in which the conduit extends along a portion of a circular path.

Claim 7

A container for use in treatment of liquid, particularly in centrifugal separation of liquid into fractions of different densities, comprising walls of flexible sheet material, the walls defining between them a closed compartment for holding a discrete quantity of liquid and a collapsible conduit through which liquid may be conveyed into or out of the container compartment, at least a section of the conduit being integrally connected with the container wall so as to be fixed relative to the walls and such that the fixed section of the conduit is disposed and arranged to serve as the liquid conveying member of a peristaltic pump, said walls being generally circular and including an upper wall, a central wall and a lower wall, the upper and central walls defining between them a first generally annular compartment and a first conduit communicating at one end thereof with the first compartment and at the other end thereof with a connecting tube secured to the upper wall, the central and lower walls defining between them a second generally annular compartment and a second conduit communicating at one end thereof with the second compartment and at the other end with the connecting tube, portions of the first and second conduits extending along portions of respective ones of two concentric circles and being adapted to cooperate with respective ones of two concentric rotors of a peristaltic pump to pass liquid into and out of the compartments.

Claim 8

A container for use in treatment of liquid, particularly in centrifugal separation of liquid into fractions of different densities, comprising walls of flexible sheet material, the walls defining between them a closed compartment for holding a discrete quantity of liquid and a collapsible conduit through which liquid may be conveyed into or out of the container compartment, at least a section of the conduit being integrally connected with the container wall so as to be fixed relative to the walls and such that the fixed section of the conduit is disposed and arranged to serve as the liquid conveying member of a peristaltic pump, said walls being generally circular and including an upper wall, a central wall and a lower wall, the upper and central walls defining between them a first generally annular compartment and a first conduit communicating at one end thereof with the first compartment and at the other end thereof with a connecting tube secured to the upper wall, the central and lower walls defining between them a second generally annular compartment and a second conduit communicating at one end thereof with the second compartment and at the other end with the connecting tube, portions of the first and second conduits extending along portions of respective ones of two concentric circles and being adapted to cooperate with respective ones of two concentric rotors of a peristaltic pump to pass liquid into and out of the compartments.