Patent ID: 7127975

Claim:
A rotary cutter comprising: a first roll rotatable about a first roll axis; and a second roll rotatable about a second roll axis which is parallel to the first roll axis; a first cutting blade and a first abutment which are provided on a periphery of the first roll and a second cutting blade and a second abutment which are provided on a periphery of the second roll; synchronizing means for synchronizing each rotation of the first roll and the second roll so that when the first roll and the second roll rotate in synchrony the first cutting blade of the first roll opposes the second abutment of the second roll and the first abutment of the first roll opposes the second cutting blade of the second roll; and distance setting means for setting a distance between the first cutting blade and the second abutment and between the first abutment and the second cutting blade, wherein the first roll and the second roll rotate in synchrony to receive a fibrous product, and the first cutting blade and the second abutment are configured to hold and cut the fibrous product partway through the thickness from one side thereof and the first abutment and the second cutting blade are configured to hold and cut the fibrous product partway through the thickness from the other side thereof at a location different from the cut made by the first cutting blade and the second abutment, wherein a first rib is provided to project radially from the periphery of the first roll and the first cutting blade and the first abutment are formed in the first rib, and a second rib is provided to project radially from the periphery of the second roll and the second cutting blade and the second abutment are formed in the second rib.