| 摘要 |
<P>PROBLEM TO BE SOLVED: To promptly decrease pressure in the storage part of a PET bottle when introduction of gas into the storage part is stopped. <P>SOLUTION: A pump device for the PET bottle includes: a casing 21 in which the pump device 40 is housed; an insertion pipe 23 to enter the inner part of the storage part 1 of the PET bottle P; an exhaust pipe 25 communicating with the insertion pipe 23 and extending to the external part of the PET bottle P; a gas feeding pipe 57 introducing gas into the storage part 1; and a connection part 30 fixing the casing 21 to an opening part 2. The pump device 40 has a function to introduce gas into the storage part 1 through the gas feeding pipe 57 by driving force of a motor M, liquid in the storage part 1 is discharged through the insertion pipe 23 and the exhaust pipe 25 by introduction of gas into the storage part 1, a ventilation hole 56 communicating with the external part of the PET bottle P is provided to the gas feeding pipe 57, and the ventilation hole 56 is closed when the gas is introduced into the storage part 1 by the pump device 40 and opened when introduction of the gas by the pump device 40 is stopped. <P>COPYRIGHT: (C)2012,JPO&INPIT |
