| 摘要 |
The invention relates to a gathered tubular film ( 12 ), especially consisting of artificial sausage skin, which is concertinaed to form a tubular caterpillar-type element. Until now, in order to gather as large a length as possible of the tubular film ( 12 ) to form a tubular caterpillar-type element of a certain length, methods have involved increasing the compression of the tubular caterpillar-type element. The aim of the invention is to achieve the same objective by providing a tubular caterpillar-type element having an outside diameter which is at least 10% larger than the outside diameter of the tubular film ( 12 ). In order to achieve this, the tubular film ( 12 ) is caught at certain points by suction nozzles on the gathering tool, and is pulled radially outwards.
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