Bridge of a corrugating machine

Abstract

A bridge of a corrugating machine controls corrugated fiberboard single-face webs fed from single-face corrugating machines. The bridge comprising a stored web supply formed by the bottom-most of the single-face webs, the stored web supply loosely-lying; a fixed guide element introducing a first reversal of direction of the web in the direction opposite a course of fabrication; a fixed redirecting element; a redirecting roller mounted in a frame swivelable about a vertical axis, the redirecting roller cooperating with the fixed redirecting element to cause a second reversal of direction of the web back in the direction of the course of fabrication, wherein the redirecting roller is disposed above the fixed redirecting element such that a web course section is created running parallel to the swivel axis; and a steering frame having a braking roller feeding the web to a preheating station, the braking roller creates a desired web tension load.

1 . A bridge of a corrugating machine for controlling one or more corrugated fiberboard single-face webs feeding in from one or more single-face corrugating machines, the bridge comprising:
 a stored web supply formed by the bottom-most of the single-face webs, the stored web supply is loosely-lying;   a fixed guide element, wherein a first reversal of direction of the web occurs via the fixed guide element in the direction opposite a course of fabrication;   a fixed redirecting element;   a redirecting roller mounted in a frame swivelable about a vertical axis the redirecting roller cooperating with the fixed redirecting element to cause a second reversal of direction of the web back in the direction of the course of fabrication, wherein the redirecting roller is disposed above the fixed redirecting element such that a web course section is created running parallel to the swivel axis; and   a steering frame having a braking roller feeding the web to a preheating station, wherein the braking roller operates to create a desired web tension load.   
     
     
         2 . The bridge according to  claim 1 , wherein the rotational axis of the redirecting roller is offset relative to its swivel axis in the direction of the course of fabrication. 
     
     
         3 . The bridge according to  claim 1 , wherein at least one of the fixed guide element and the fixed redirecting element is a fixed redirection rod. 
     
     
         4 . The bridge according to  claim 1 , wherein the fixed guide element and the fixed redirecting element is a fixedly mounted roller. 
     
     
         5 . The bridge according to  claim 1 , wherein a friction-enhancing coating is applied to the redirecting roller. 
     
     
         6 . The bridge according to  claim 1 , whereby a structured surface of the redirecting roller corresponds to a corrugation path of the single-face web running over the redirecting roller. 
     
     
         7 . The bridge according to  claim 1 , wherein a mechanical swivel-motion link is disposed between the redirecting roller and the steering frame. 
     
     
         8 . The bridge according to  claim 7 , wherein the mechanical swivel-motion link is formed by one or more tension elements. 
     
     
         9 . The bridge according to  claim 1 , wherein the redirecting roller further comprises an actuating-motor swivel drive and the steering frame further comprises an angular-position measuring sensor producing an signal, wherein the actuating-motor swivel drive is controlled by the signal from the measuring sensor such that the swivel position of the redirecting roller follows that of the steering frame. 
     
     
         10 . The bridge according to  claim 9 , wherein the redirecting roller further comprises an angular-position sensor producing a signal, the signal is processed with the signal from the angular-position measuring sensor of the associated steering frame in a summing node to obtain the control signal for the actuating-motor swivel drive. 
     
     
         11 . The bridge according to  claim 10 , wherein a correction signal is fed to a third input of the summing node, the correction signal being obtained from the signal of the angular-position measuring sensor associated with the redirecting roller and a signal derived from the speed of the single-face corrugated fiberboard web. 
     
     
         12 . The bridge according to  claim 1 , wherein a twin roller is disposed between the redirecting roller and the steering frame, the twin roller operating to increase the wrap angle. 
     
     
         13 . A method of controlling one or more corrugated fiberboard webs feeding in from one or more single-face corrugating machines, using a bridge, comprising the steps of:
 feeding the bottom-most of the single-face webs into a stored web supply, the stored web supply is loosely-lying;   passing the web from the stored web supply around a fixed guide element to introduce a first reversal of direction of web in the direction opposite a course of fabrication;   passing the web along a fixed redirecting element;   passing the web along a redirecting roller, the redirecting roller being mounted in a frame swivelable about a vertical axis, the fixed redirecting element cooperating with the redirecting roller to introduce a second reversal of direction of web back in the direction of the course of fabrication, wherein the redirecting roller is disposed above the fixed redirecting element such that a web course section is created running parallel to the swivel axis, the fixed redirecting element and redirecting roller further cooperating to generate a desired web tension load; and   passing the web through a steering frame having a braking wheel, the braking wheel operating to feed the web in a braked fashion to a preheating station.   
     
     
         14 . The method of  claim 13 , further comprising the step of adjusting the steering frame wherein the center of the translational-rotational path of motion coincides with the swivel axis of the redirecting roller.