In respect of the hazards listed in clause 4 and dealt with in clause 5, this European Standard contains safety requirements for the design and construction of the following kinds of haul-offs used in extrusion lines for processing plastics and rubber: - caterpillar haul-offs, - belt haul-offs, - capstan haul- offs, - belt capstan haul-offs, - roller haul-offs. The machine begins at the material inlet opening and ends at the material outlet.