Mixer-container and method for assembling a mixer-container including a telescopic shaft

A mixer-container intended to be assembled, the mixer-container comprising:

• a container having a wall defining an inner space suitable for filling with biopharmaceutical fluid, the wall being a flexible wall, the container further comprising a mixing device comprising a shaft having an adjustable length along a main axis;
• a drive motor located outside the container, the drive motor being suitable for rotating the shaft of the mixing device;
• and
• a rigid outer containment device comprising a bottom wall and a peripheral wall defining a housing adapted to receive the container,
• wherein the container extends in the rigid outer containment device with the flexible wall of the container being arranged on the bottom wall of the rigid outer containment device,
• wherein the container further comprises a first bearing attached to the wall, the shaft extending at least into the inner space from the first bearing, the first bearing comprising a flange provided with an outer annular collar that forms an annular external groove outside the container, the outer annular collar inwardly delimiting a cavity provided outside the container,
• wherein the shaft comprises a first part away from the first bearing and a second part that is a hollow upper part in contact with the flange, the shaft being adapted to rotate at least one mixing member attached to the first part,
• wherein the drive motor is adapted to enable magnetically driving the shaft and comprising a rotary driving disc located outside the container, the rotary driving disc operatively engaging with a rotary driven disc attached to the shaft, the drive motor being connected with the outer annular collar of the flange so that, in a connected state between the drive motor and the outer annular collar, the rotary driving disc of the drive motor is inserted inside the flange to fill the cavity,
• wherein the drive motor is connected with the outer annular collar of the flange outside the rigid outer containment device, and
• wherein the length of the shaft along the main axis being adjusted to be increased by selective upward displacement of the second part toward an extended configuration without displacing the first part, in order to position the shaft facing the drive motor to enable the drive motor to rotate the shaft, the extended configuration of the second part being maintained by a clamp, the flange being clamped by the clamp extending in the annular external groove for maintaining the connected state and the extended configuration.