Winding – tensioning – or guiding – Convolute winding of material – With cutting – perforating – or notching
Reexamination Certificate
1999-01-15
2001-03-27
Walsh, Donald P. (Department: 3653)
Winding, tensioning, or guiding
Convolute winding of material
With cutting, perforating, or notching
C242S525600
Reexamination Certificate
active
06206321
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application claims priority under 35 U.S.C. § 119 of German Patent Application No. 198 02 310.3, filed Jan. 22, 1998.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a reel cutter for a material web and method of using the same, and more specifically to a reel cutter and method that provides a cut edge with a clean cut.
2. Discussion of Background Information
In the production of paper webs, the desired smooth edge end face in the winding roll, which is ultimately sold, is not always achieved. In the production of paper webs, the desired smooth edge resulting in an even end face in the winding roll which is ultimately sold is not always achieved. Generally, after being manufactured, the paper webs are ultimately cut into a number of partial webs to a width which can be used by a consumer, for example a printing plant. Therefore, this process of cutting the paper web into a number of partial webs can be used to also cut the edges of the paper web at the same time. Blades, or other cutting tools, are disposed in the cutting device, generally, in the region of the two longitudinal edges of the paper web, and are intended to smooth the edges of the paper web by virtue of the fact that they cut off a relatively narrow edge strip. The edge strips can be supplied directly to the paper plant in order to once more enter the production circuit.
At higher production speeds, it is observed that the cut edges do not exhibit the desired quality.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to a reel cutter for a material web and method of using the same that substantially obviates one or more of the problems arising from the limitations and disadvantages of the related art.
It is an object of the present invention to improve the quality of the edge cut.
It is another object of the present invention to allow higher production speeds while still achieving a clean edge cut.
Accordingly, one aspect of the present invention is directed to a reel cutter for a material web that includes an inlet section, an outlet section, and a cutting device. The cutting device is between the inlet section and the outlet section. The cutting device includes an edge cutting device disposed in a region of at least one edge of the material web for producing at least one edge strip.
According to another aspect of the present invention, the edge cutting device is associated with a tensioning device that acts on the at least one edge strip.
According to yet another aspect of the present invention, the tensioning device includes a pinch roll pair.
In a further aspect of the present invention, the two rolls of the pinch roll pair protrude laterally beyond the at least one edge strip. The two rolls of the pinch roll pair act on a region of the material web extending laterally next to the one or more edge strips.
In another aspect of the present invention, a first roll of the pinch roll pair includes a guide roll for the material web after being cut.
In yet another aspect of the present invention, a second roll of the pinch roll pair includes a pinch roll, the second roll of the pinch roll pair acts only on the one or more edge strip and a neighboring strip of the material web.
According to a further aspect of the present invention, an edge strip receptacle is disposed after the tensioning device in a travel direction of the material web.
In still another aspect of the present invention, the edge strip receptacle includes a suction device.
According to yet another aspect of the present invention, a spreader device is disposed after the tensioning device.
According to a further aspect of the present invention, the tensioning device is followed by a subsequent treatment device. The subsequent treatment device treats the material web without the one or more edge strips.
In another aspect of the present invention, the tension of the subsequent treatment device and the tension of the tensioning device are matched to each other by a control device.
According to yet another aspect of the present invention, the invention includes a method for producing a clean edge cut from a material web that includes: passing a material web to a reel cutter; cutting the material web, the material web is cut into at least one partial web and at least one edge strip, the cutting is along at least one cutting line;
and providing a tension on the at least one partial web and the at least one edge strip. The tension is uniform on both sides of the at least one cutting line. Thereby, a clean cut is produced even at higher production speeds.
In still a further aspect of the present invention, the at least one edge strip is removed from the cut material web.
According to another aspect of the present invention, the at least one partial web is separated apart for subsequent treatment.
According to yet another aspect of the present invention, subsequent treatment for the at least one partial web is provided.
In a further aspect of the present invention, the subsequent treatment includes winding the at least one partial web.
In still another aspect of the present invention, the at least one edge strip is removed from the at least one partial web.
According to yet another aspect of the present invention, the removing includes using suction to remove the at least one edge strip from the at least one partial web.
In still a further aspect of the present invention, the tension is provided by a pinch roll pair.
In another aspect of the present invention, the tension on the at least one partial web and the at least one edge strip is matched to a subsequent treatment tension.
According to yet another aspect of the present invention, the tension on the at least one partial web and the at least one edge strip is controlled based on the subsequent treatment tension.
Other exemplary embodiments and advantages of the present invention may be ascertained by reviewing the present disclosure and the accompanying drawings.
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Greenblum & Bernstein P.L.C.
Voith Sulzer Papiertechnik Patent GmbH
Walsh Donald P.
Webb Collin A.
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