Device comprises a tool lying with its lower side on a covering layer in its operating position and formed as a partially flexible mat-like element having chambers which are open to the lower side of the mat element

摘要

Device comprises a tool lying with its lower side (21) on a covering layer (35) in its operating position and formed as a partially flexible mat-like element (11) having chambers (24) which are open to the lower side of the mat element. Preferred Features: The mat element has protrusions (23) on its lower side. The chambers have an opening width which corresponds to the average size of additives. The chambers are 2.5-3 cm in size. The mat element is a rubber mat.