| 摘要 |
PURPOSE: An air intake pump is provided to prevent a plastic bag from becoming torn in the thermal sealing of the plastic bag. CONSTITUTION: An air intake pump comprises a base member(10), a housing(20), a piston member(60), a first heat wire, a power supply unit(70), a main gasket and a stopper. The housing is mounted on the base member to be able to move up and down. The piston member is arranged in the housing to be able to move up and down. The top of the piston member is exposed to outside through the top of the housing. The first heat wire is mounted on the bottom of the housing to be exposed to outside. The power supply unit supplies the power to the first heat wire. The main gasket is protruded upwardly from the top of the base member or downwardly from the bottom of the housing. The stopper is protruded upwardly from the top of the base member or downwardly from the bottom of the housing. When the housing descends, the main gasket compresses the plastic bag arranged between the base member and the housing until the descending of the housing stops by the stopper.
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