Apparatus and method for cutting web

An apparatus for cutting a web from a take-up core, comprising a rotary cutter positionable adjacent the take-up core, the rotary cutter including:

• a stationary shaft;
• a cutter drum mounted for rotation about the stationary shaft wherein said cutter drum is configured to rotate between at least a standby position, a cutting position and a post-cutting position;
• means mounted to said stationary shaft for forming a gas suction chamber within said cutter drum and for respectively forming inlet and outlet gas discharge chambers supplying a gas at a positive pressure at upstream and downstream sides of said gas suction chamber in a direction of rotation of the cutter drum;
• a knife mounted to an outer periphery of the cutter drum, wherein an outer periphery of the cutter drum comprises first gas jet holes positioned upstream of the knife in the direction of rotation of the cutter drum, and second gas jet holes upstream of the first gas jet holes in the direction of rotation of the cutter drum;
• and
• wherein said suction chamber and said inlet and outlet chambers are positioned such that;
• the second gas jet holes of the cutter drum are communicated with at least one of the web inlet and outlet air discharge chambers when said cutter drum is in the standby position;
• a first portion of the first gas jet holes of the cutter drum are communicated with the web inlet side air discharge chamber while a second portion of the first gas jet holes are communicated with the gas suction chamber when said cutter is in the cutting position and
• the first gas jet holes of the cutter drum are communicated with the web outlet side gas discharge chamber when said cutter drum is in the post cutting position.