Machine for the manufacture or treatment of a material web

Abstract

A machine for the manufacture or treatment of a material web, in particular of a paper or cardboard web, including a rope guide for the threading of a marginal web strip. The rope guide has two endless ropes which can be brought together to form a rope nip and whose run course can be correspondingly changed for the positioning of the rope nip in a threading position within a plane extending in the machine running direction and perpendicular to the material web.

What is claimed is:  
     
         1 . A machine for the manufacture or treatment of a material web, comprising a rope guide including two endless ropes forming a rope nip therebetween, said rope guide being configured for threading a marginal web strip, said rope guide having a run course, said run course being changeable for positioning said rope nip in a threading position within a plane extending in a machine running direction and perpendicular to the material web.  
     
     
         2 . The machine of  claim 1 , wherein a position of said rope nip is changeable within said plane extending in said machine running direction and perpendicular to the material web.  
     
     
         3 . The machine of  claim 1 , wherein said two ropes are guided independently of a position of said rope nip, both said ropes guided exclusively in a plane extending in said machine running direction and perpendicular to the material web.  
     
     
         4 . The machine of  claim 1 , wherein a position of said rope nip is changeable in said machine running direction.  
     
     
         5 . The machine of  claim 1 , wherein said two ropes are guideable for a first positioning of said rope nip in said threading position and into a region of a web scanning device, said two ropes being retractable to a second positioning for a release of said device.  
     
     
         6 . The machine of  claim 5 , wherein said web scanning device includes a frame, and said two ropes are guideable through said frame.  
     
     
         7 . The machine of  claim 5 , wherein said web scanning device includes a frame, and said rope nip is adjustable between said threading position in which said two ropes are guided through said frame of said web scanning device and a retracted position in which said web scanning device is released.  
     
     
         8 . The machine of  claim 1 , wherein said rope guide includes a front guide section disposed in front of a web scanning device as viewed in said machine running direction, a rear guide section disposed after said web scanning device as viewed in said machine running direction, said two ropes are guided mutually separated between said front guide section and said rear guide section and on mutually opposite sides of said web scanning device, the material web including a material web tip, said rope nip is formed at the start of said rear guide section and is adjustable into a takeover position to take over said material web tip from said front guide section through a frame of a web scanning device and returning to a retracted position disposed behind said web scanning device, as viewed in the machine running direction, to transfer the material web into said rear guide section.  
     
     
         9 . The machine of  claim 1 , further comprising two sheaves and an adjustment device for positioning said two sheaves to form a rope nip, and wherein said two ropes are guided over said two sheaves.  
     
     
         10 . The machine of  claim 1 , further comprising a dryer section, and wherein said rope guide is provided for a threading of the marginal web strip into a said dryer section.