(57) The invention is concerned with the technical field of bookbinding machines, and
in particular with a device for piercing sheets and webs along fold lines thereof.
A device (1) is provided which comprises cutting members (2) defined by a punch wheel
(9) having teeth whose thickness is equal to the width of sheet portions (8) to be
cut off, anvil members (3) defined by a pair of discs (15) flanking said punch wheel
(9), on opposed sides thereof, and a sleeve (17) carrying said disks (15) mounted
for angular rotation and axial oscillation on a secondary shaft (16) parallel to a
primary shaft (10) carrying said punch wheel (9).
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