| 摘要 |
PROBLEM TO BE SOLVED: To provide a method in which the removal of foreign matters from a preform is made easier.SOLUTION: Provided is a method for removing foreign matters within a preform in which, while continuously running a preform (1) in the inverted state with a mouth part (2a) facing downward, a filtered air is blown into the preform (1) from the mouth part (2a) of the preform (1), and at the same time the air is sucked from the mouth part (2a) of the preform (1); and thereby making it easier to discharge the foreign matters to the outside of the preform (1) by the air flow and the self-weight of the foreign matters, becomes possible.SELECTED DRAWING: Figure 1 |
