| CPC B65H 19/1873 (2013.01) [B65H 2301/4631 (2013.01)] | 20 Claims |

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1. A roll exchange chamber for exchanging a substrate roll, comprising:
a rotatable base construction being rotatable around a central axis, the base construction comprising:
a first roll holder for holding a first substrate roll;
a second roll holder for holding a second substrate roll; and—a wall for providing a first compartment and a second compartment in the roll exchange chamber, the wall being arranged between the first roll holder and the second roll holder.
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