| 摘要 |
A chuck for a plastic packaging bag, comprises: a male member having a male claw portion; a female member having a female claw portion; and a mechanism for causing the male claw portion to engage and disengage from the female claw portion, wherein one of the male claw portion and the female claw portion has one or more linear protrusions which extend in longitudinal directions in a contact portion in which the male claw portion engages the female claw portion, and wherein the male claw portion contacts the female claw portion in the contact portion by a line contact, by which the one or more linear protrusions of the one of the male claw contact the other claw portion of the male claw portion and the female claw portion and by a surface contact, by which that the male claw portion contacts the female claw portion.
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