Treatment installation for straws for packaging animal semen, comprising a supply and positioning device for said straws

The installation (1) comprises a treatment machine (12) and a supply and positioning device (16) configured to receive the straws (2) and dispose them one by one in a predetermined orientation for their treatment by said machine. The device (16) comprises a curved ramp (52) having a reception portion (64) for the straws (2) and an ejection portion (65) for the straws, the ramp being configured to convey, to the ejection portion (65), a straw (2) received on the reception portion (64) and sliding on the ramp (52), the ramp having a concave profile such that said profile has an orientation closer to the vertical in the reception portion (64) than in the ejection portion (65), such that a straw received on the reception portion (64) is accelerated to the ejection portion (65) at which the straw is guided and ejected with a predetermined orientation.