Patent Publication Number: US-6708859-B2

Title: Device for infeeding a web

Description:
FIELD OF THE INVENTION 
     The present invention is directed to a device for drawing in a web in a printing press. A web draw-in device is supported by a guide. This guide can be moved to divert the draw-in device transversely with respect to the conveying direction of the web. 
     BACKGROUND OF THE INVENTION 
     It is generally known to fasten or to mount guide devices for paper web draw-in devices, for example guide devices for paper web draw-in devices such as cables, belts or roller chains to the inside of at least one of the lateral frames of a web-fed rotary printing press. For example, in DE-OS 22 41 127 the guide devices are fastened to the inside of the lateral frame by the use of forked supports. 
     SUMMARY OF THE INVENTION 
     The object of the present invention is directed to providing a device for drawing in a web. 
     The object is attained in accordance with the invention by providing guide devices that support the web draw-in device. These guide devices are supported so that they can move transversely with respect to the conveying direction of the web. 
     The advantages which can be achieved by the present invention lie, in particular, in creating a guide device for paper web draw-in devices which can be adapted to the width of the roll changer. In the course of this, holders for the guide devices can be adjusted in such a way that the alignment of the guide devices and thus of the paper web draw-in devices is in agreement with the paper web width. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     A preferred embodiment of the present invention is represented in the sole drawing and will be described in greater detail in what follows. 
     The sole drawing show a perspective representation of a device in accordance with the present invention for the axial adjustment of guide devices for paper web draw-in devices. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Rollers  03 ,  04 , which may be, for example, paper guide rollers, are rotatably seated between lateral frames  01 ,  02  of a web-fed rotary printing press. Spaced-apart guide rails  08 ,  09 , which point in a direction parallel to the direction A of the axes of rotation  06 ,  07  of rollers  03 ,  04 , are fastened on at least one lateral frame  02 . The guide rails  08 ,  09  can, for example, consist of C-shaped profiled sections and, as depicted in the sole drawing, can also be embodied traverse-like between both lateral frames  01 ,  02 . 
     Slidable crossheads, which are not specifically represented in the sole drawing, are provided with threaded bores. These slidable crossheads are arranged in the C-shaped profiled sections of the guide rails  08 ,  09 . 
     A holder  11 , which can be infinitely variably displaced in the axis parallel direction A, is supported by the guide rails  08 ,  09 . Holder  11  supports one or several guide devices  12 , such as, for example, guide rollers  12 , which guide rollers  12  are used for receiving or diverting a paper web draw-in device  13 . The paper web draw-in device  13  may be, for example, a belt system which can be pulled forward and back. 
     The holder  11  can consist of, for example, a plate which has brackets  14 ,  16  facing in the axis-parallel direction A, and through which the plate-shaped holder  11  is in connection, by the use of holding screws, which are not specifically represented, with the slidable crossheads of the guide rail  08 ,  09 . In this way, the paper draw-in devices  13  are arranged to be slidable in the axis-parallel direction A in respect to a lateral edge of a paper web, not represented, which is to be drawn in. 
     The draw-in device  13  is arranged, in a first position, in the vicinity of a lateral edge of a first web of a first width, and the draw-in device  13  can be arranged, in a second position, in the vicinity of a lateral edge of a second web of a second width. 
     Each of the holders  11  can receive the guide devices  12  for one or for several paper draw-in devices  13 , as shown in the sole drawing figure. 
     The guide devices  12  can also consist of curved C-shaped hollow profiled sections for receiving a finite length paper draw-in device  13 , for example a roller chain. 
     The start of a paper web to be drawn into the press is fastened in a known manner to the paper web draw-in device  13 . The paper web draw-in device  13  is guided by the guide devices  12 , supported by the holder  11 , to turn through approximately 180° about the paper web guide roller  03 ,  04  with which each paper web draw-in device  13  cooperates. 
     While a preferred embodiment of a device for infeeding a web in accordance with the present invention has been set forth fully and completely hereinabove, it will be apparent to one of skill in the art that various changes in, for example the drive for the draw-in devices, the type of printing press used, and the like could be made without departing from the true spirit and scope of the present invention which is accordingly to be limited only by the following claims.