| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a tube cleaner which can surely remove the dust attached to the surface of the tube. SOLUTION: This tube cleaner has a penetration hole 41 whose diameter is smaller than the outward shape of the tube. Flexible cleaner sheets 4, on which plural number lines of notching 42 are formed radically from a penetration hole 41 at regular intervals, are placed at least 2 pieces along the feed direction of the tube so that the phases of the notching part 42 don't accord to each other.</p> |
