Winding – tensioning – or guiding – Material guide or guard – Fluid suspension
Patent
1998-05-08
1999-10-19
Mansen, Michael R.
Winding, tensioning, or guiding
Material guide or guard
Fluid suspension
226 91, 226172, B65H 2000
Patent
active
059674563
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The present invention relates to a turning rod for deflecting a material web. The turning rod can be charged with compressed air and has air outlet openings on an outer guide tube which is supported for rotation about its longitudinal axis.
DESCRIPTION OF THE PRIOR ART
It is known to divide paper webs, for example, in web-fed rotary printing presses, after printing of the webs into two or more partial paper webs by means of one or more longitudinal cutting devices. These partial paper webs are placed one above the other by means of turning rods, with or without reversing them and in variable sequences, to form a train. As a rule, the turning rods are horizontally arranged in a lateral frame at an angle of 45.degree..
If, in connection with a path of travel of a partial paper web parallel with the lateral frame, feeding of the partial paper web takes place on the right side of the frame instead of feeding of the partial paper web taking place on the left side of frame, for example for the purpose of merging paper webs, it is disadvantageous, in connection with the above mentioned turning rod arrangement, that it is necessary to either convert the turning rod or to replace it, so that an air cushion is provided between the turning rod and the partial paper web.
A turning rod is furthermore known from DE 41 30 678 A1, which has a helical groove for guiding a draw-in belt that is arranged next to the guide area of the partial paper web.
In this case, it is disadvantageous that the draw-in belt must overcome a large frictional resistance when traveling around this turning rod. The high tensile forces acting on the draw-in belt, can lead to tearing apart of the draw-in belts.
SUMMARY OF THE INVENTION
It is the object of the invention to create a turning rod which can be encircled by a paper web from "two sides".
In accordance with the invention, this object is attained by providing a turning rod that has an outer guide tube which has air outlets on a portion of its surface. The guide tube is supported between two holders and is rotatable about its longitudinal axis. Such rotation relocates the guide tube air outlets so that they will be properly situated in respect to the direction of travel of a paper web being turned by the turning rod.
The advantages which can be achieved by the present invention reside in that the turning rod can be encircled from both sides, i.e. from a left side or half or from a right side or half by a paper web. The half of the tube facing the paper web respectively has air outlet openings which can be moved with little effort by half a turn of the tube. It is therefore possible to eliminate the need for a conversion or replacement of turning rods particularly in those cases where the partial paper webs are merged at a different place in so-called merging towers, i.e. on another level of the merging tower. It furthermore is advantageous that a helically-shaped guide groove, on which compressed air is blown, is provided on a holder portion of the turning rod of the present invention for the smooth guidance of a moving draw-in belt. Discharge or blowing of air on the guide groove advantageously only takes place for the period of time of the actual passage of the draw-in belt through the guide groove.
Further than that, it is also advantageous, for the universal use of the turning rod, if a second guide groove, which is arranged in the opposite direction to the first guide groove, is provided on the holder.
BRIEF DESCRIPTION OF THE DRAWINGS
An exemplary embodiment of the invention present is represented in the drawings and will be described in more detail in what follows.
FIG. 1, a front elevation view of a turning rod in accordance with the invention, partially cut along the line I--I in FIG. 2;
FIG. 2, a cross section through a turning rod in accordance with the present invention, wherein the cross section runs through the air outlet openings of the guide tube and of the connecting tube, such as is represented along the section line II--II in FIG. 1; the guide
REFERENCES:
patent: 4154386 (1979-05-01), Kawada
patent: 4453465 (1984-06-01), Heller et al.
patent: 4467950 (1984-08-01), Karlsson et al.
patent: 4889269 (1989-12-01), Long et al.
patent: 5273201 (1993-12-01), Hambrecht et al.
patent: 5357859 (1994-10-01), Eckert
patent: 5520317 (1996-05-01), Eckert et al.
patent: 5525602 (1996-06-01), Mamberer et al.
Koenig & Bauer--Albert Aktiengesellschaft
Mansen Michael R.
LandOfFree
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