Package making – Methods – Wrapping contents including cover forming
Reexamination Certificate
1999-08-23
2002-04-16
Smith, Scott A. (Department: 3721)
Package making
Methods
Wrapping contents including cover forming
C053S587000
Reexamination Certificate
active
06370848
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
The present invention claims priority under 35 U.S.C. §119 of German Patent Application No. 198 37 981.1, filed on Aug. 21, 1998, the disclosure of which is expressly incorporated by reference herein in its entirety.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a process and device for the production and packaging of material web rolls, and more particularly, to a device having a slitting station for slitting a material web into several strips, and further having a winding bed for accommodating a stack of material web rolls arranged next to one another.
2. Discussion of Background Information
In one of the final manufacturing steps, a paper web is wound into a transportable winding roll and is then packaged. It is necessary to slit the finished paper web to a certain width during this process. Paper webs are manufactured in fairly large widths of up to approximately 10 meters (m). However a consumer (e.g., a printer), only needs a roll width of up to a current maximum of approximately 3.8 m. In many cases, rolls have an even smaller width, down to approximately 0.8 m. Accordingly, the paper web is unwound from a master roll having a large width, runs first through a slitting device that produces web subsections which are then wound up into the individual winding rolls. The rolls have diameters in the range from approximately 1 to 2.5 m.
Once the material web rolls have been wound, they still must be packaged. These rolls are customarily ejected from the winding station and delivered to a packaging station, where they are wrapped in a packaging web. As soon as the rolls have been ejected, the winding station can again be prepared for the accommodation of new material web rolls (e.g., winding tubes can be inserted onto which the material web strips can be wound).
Because of long setup times required, a single winding station is not normally enough for the manufacture of material web rolls. Such a single helical winding roll packaging is described in German patent document No. DE 19535 746 C2. However, two winding stations often wastefully provide too great a capacity. Thus, the winding stations often operate with excess capacity.
SUMMARY OF THE INVENTION
The present invention provides a device and process for the production and packaging of material web rolls. The device includes a slitting station configured to slit a material web into a plurality of strips and a winding bed adapted to accommodate a stack of individual material web rolls next to one another. Also included is a packaging web dispenser adapted to travel, in at least one direction, parallel to the axis of the stack of individual material web rolls, and further adapted to dispense a packaging web at a predetermined angle to a circumferential direction of rotation of the stack of individual material web rolls. Additionally, a cutting device adapted to cut the packaging web parallel to the end faces of the material web roll may be provided.
Also, the packaging web dispenser may be adapted to travel in two directions parallel to the axis of the stack.
The packaging web dispenser may be arranged on a rail above the winding bed, and the cutting device may be also be arranged on the rail. Also, the cutting device may have a circular blade adapted to be moved at least toward the stack in a generally radial direction. Further, the circular blade may move away from the stack in a generally radial direction
Additionally, the rail may carry a loading roller which forms a nip with the stack of individual material web rolls during winding, and the nip may be adapted to accept the packaging web therethrough.
The packaging web and the material web may further travel along at least a portion of the same path.
Also, the cutting device may be formed by the slitting station. Additionally, the slitting station may include a sensor adapted to detect the passage of a leading side edge of the packaging web.
The circular blade may be further adapted to be moved away from the stack in a generally radial direction.
The process of the present invention includes winding the material web rolls about an axis, from strips created by a longitudinal slit, helically wrapping a packaging web about the circumference of the stack of material web rolls, the stack of material web rolls being in substantially the same position in which they are wound. The process also includes separating the packaging web at a position corresponding to the respective end faces of each material web roll.
The process may further include guiding the packaging web from before one roll stack end face, to past another roll stack end face, and cutting the packaging web parallel to the roll stack end faces.
Additionally, the process may include cutting the packaging web located on the circumference of the roll stack.
Further, the process may include cutting the packaging web after completion of packaging.
Also, the process may include cutting the packaging web as it is supplied, coordinating the feed rate of the packaging web with the movement of the packaging web parallel to the axis of rotation of the stack, and forming at least one separating line parallel to the end faces of the individual material web rolls.
Further, the packaging web may be passed through the same slitting device through which the material web passes.
The process may yet still further include holding together, at least in the region of a leading edge of a packaging web, adjacent packaging web sections on both sides of the separating line.
The present invention packages material web rolls in a cost-effective manner.
In the present invention, the circumference of the material web rolls lying next to one another are in the form of a horizontal stack, in the same positions as for winding, and the rolls are wrapped by a packaging web guided about the stack in a helical curve. The packaging web is separated at each position corresponding to the end faces of the material web rolls.
This configuration has several advantages. The winding station can be used to produce the circumferential packaging of the material web rolls. Not only are the material web rolls rotated during winding, but are also rotated during the application of the packaging web, which is drawn onto the circumference as the material web rolls rotate. Since this rotary drive for the material web rolls must already be used for winding, the rotary drive may also be used for creating the circumferential packaging.
The present invention also advantageously uses a special packaging web guide. Because the packaging web is wound about the stack in the form of a helix, only a single strip of packaging web is needed, regardless of the width (i.e., the axial length) of the stack. The invention may further advantageously be used when the widths of the material web rolls vary a great deal and/or are significantly larger than the width of the packaging web. With a relatively large stack, the packaging merely takes a little longer because the helical curve is longer, but the process remains the same. It is only necessary to cut the packaging web at the end faces of each material web roll so that the web rolls may be handled individually. If a number of material web rolls, for example, two, are combined in one shared package, then it is not necessary to make a cut at each end face of the material web rolls, but rather only in those locations where one wishes to separate groups of material webs from one another. Once the circumference of the material web rolls has been packaged and the material web rolls are available individually or in groups, they can be ejected from the winding station and transported to an end face packaging unit. During this transport, however, the circumference of the material web rolls is already protected so that the risk of subsequent damage during transport is kept to a minimum. At the end face packaging unit, end covers may be applied. If necessary, an edge strip can additionally be used to protect the edges of the material web roll and/or to hold the end
Cramer Dirk
Goddemeier Ludger
Schölzke Volker
Greenblum & Bernstein P.L.C.
Paradiso John
Smith Scott A.
Voith Sulzer Papiertechnik Patent GmbH
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