Filling and covering machine for centrifuge tubes with tethered caps

A filling and covering machine for centrifuge tubes with tethered caps, each of the centrifuge tubes with tethered caps including a tube body and a cap connected to the tube body, said filling and covering machine adapted for filling a fluid into the tube body of each of the centrifuge tubes with tethered caps and covering the cap of each of the centrifuge tubes with tethered caps, said filling and covering machine comprising:

• a conveying device that is adapted for conveying the centrifuge tubes with tethered caps, that includes a plurality of positioning members spaced apart from each other and each adapted for positioning the tube body of one of the centrifuge tubes with tethered caps, and that has an upper end surface;
• a cap-flapping device that has
• an upper planar surface substantially parallel to said upper end surface, and
• a cap-guiding member disposed adjacent to said conveying device and having
• a starting end portion,
• an ending end portion that is opposite to said starting end portion, and
• a guiding surface that extends from said starting end portion to said ending end portion, and that cooperates with said upper planar surface to define an included angle therebetween decreasing gradually from said starting end portion to said ending end portion, each of said positioning members of said conveying device being movable relative to said guiding surface of said cap-guiding member from said starting end portion to said ending end portion;
• a filling device that is disposed between said starting end portion and said ending end portion of said cap-guiding member and that is adapted for injecting the fluid into the tube body of each of the centrifuge tubes with tethered caps;
• and
• a cap-pressing device that is disposed adjacent to said ending end portion of said cap-guiding member and that is adapted for pressing the cap of one of the centrifuge tubes with tethered caps on the tube body.