DEVICE FOR DECREASING VOLUME OF VESSEL

PROBLEM TO BE SOLVED: To provide a device for decreasing volume of vessels having an enhanced capacity of compression of vessels by shortening a required time for one cycle of compression of vessels. SOLUTION: This device is equipped with a device body 1 having a charging inlet for charging vessels into the inside, with a compressing and volume- decreasing means in which a pair of compression bodies 51, 52 in this device body are installed and relatively approach or recede, a pair of compressing bodies come into contact with vessels between the pair of compressing bodies by relatively approaching them, to compress the vessels by further relative approach, and after the compression the pair of compressing bodies relatively recede to release the compressive state of the vessels, and furthermore with a recovery part to recover the vessels compressed by the compressing and volume-decreasing means; thus, the velocity of a process of relative approach of the pair of compressing bodies 51, 52 in the compressing and volume- decreasing means and the velocity of a process of relatively receding after the compression are faster than the velocity at the time when the pair of compressing bodies brought into contact with the vessels further relatively approach to compress the vessels.