Paper making machine and a method of cutting a fibrous web in a paper making machine

A paper making machine (1) comprising:

• a forming section (2) in which a fibrous web (W) can be formed;
• a drying section (5) in which a formed fibrous web (W) can be dried;
• a reel-up (11) on which a dried fibrous web (W) can be wound into a roll (12);
• at least one water jet cutting device (17, 18, 19);
• and
• at least one blowing device (20, 21, 22) configured to blow gas or air in an area of the at least one water jet cutting device (17, 18, 19),
• wherein:
• a machine direction (MD) is defined as the direction from the forming section (2) toward the reel-up (11) and the paper making machine (1) is configured to carry a fibrous web (W) in the machine direction (MD) along a predetermined path (P),
• the at least one water jet cutting device (17, 18, 19) is configured to cut the fibrous web (W) that is moving in the machine direction (MD) such that the fibrous web (W) is divided into at least one waste part (23a, 23b, 30) and a remaining part (24, 29),
• the paper making machine (1) is configured to direct the at least one waste part (23a, 23b, 30) away from the predetermined path (P) and to convey the remaining part (24, 29) further in the machine direction (MD) along the predetermined path (P),
• the at least one blowing device (20, 21, 22) is configured to blow the gas or air against the water jet cutting device (17, 18, 19) in a direction toward the remaining part of the fibrous web (24, 29) such that fiber particles that have been released by the cutting action of the water jet cutting device (17, 18, 19) are blown onto the surface (25) of the remaining part (24, 29) of the fibrous web (W) and follow the remaining part (24, 29) of the fibrous web along the predetermined path (P),
• the at least one blowing device (20, 21, 22) comprises a nozzle with an exit opening (41) through which the air or gas is ejected in a stream (47), the nozzle being oriented at an angle (α) relative to the machine direction (MD) such that the stream (47) of air or gas that is blown out of the exit opening (41) is directed in its entirety at an angle to the machine direction (MD), and
• the nozzle of the at least one blowing device (20, 21, 22) is configured to a create a circular cylindrical or cone-shaped stream (47) of air or gas toward the water jet cutting device (17, 18, 19).