Presses – With additional treatment of material – Winding or folding sheet – web or strand
Reexamination Certificate
1999-07-15
2001-06-19
Gerrity, Stephen F. (Department: 3721)
Presses
With additional treatment of material
Winding or folding sheet, web or strand
C100S16200R, C100S16200R, C100S304000, C248S679000
Reexamination Certificate
active
06247398
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application claims priority under 35 U.S.C. § 119 of German Patent Application No. 198 32 065.5, filed on Jul. 16, 1999, 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 calender arrangement for manufacturing a web of paper or similar material. More particularly, the present invention is directed to a calender having a frame supported from below and at least live rolls mounted oil it, whose axes lie in a common plane running roughly parallel to the frame.
2. Discussion of Background Information
In a known calender arrangement of this type, such as DE 196 33 671 A1, two 5-roll stacks are arranged on a frame, one above the other, in a common vertical plane. The frame rests with its bottom on a footing.
DE 195 34 911 C2 shows an 8-roll stack whose center plane is inclined approximately 60° relative to the horizontal.
SUMMARY OF THE INVENTION
The present invention provides a calender with a frame that minimizes vibrations in the calender.
The present invention has a common plane parallel to a frame that extends at an angle relative to the horizontal. The angular inclination of the frame permits support at both the bottom and the top. With a 2-point support, the tendency to vibrate is significantly reduced compared to a frame which is supported only at the bottom. Moreover the frame can be produced more easily and less expensively.
Preferably, the frame is supported both at the top and at the bottom on bearing surfaces solidly attached to a building. Relatively strong forces can be dissipated by these bearing surfaces.
Preferably, the bearing surfaces extend horizontally. Thus, vertical forces, which are the most common, can be readily dissipated.
Preferably, the upper and lower bearing surfaces are formed by concrete footings (a pillar, a pedestal, or the like). Such concrete footings can be provided as part of the structure of the building in a significantly more cost effective manner than as supports installed on the frame.
An upper support surface is preferably designed on a support foot which is arranged on the frame near its upper end. A lower support surface is also preferably constructed directly on the frame.
Preferably the common plane extends at an angle of approximately 30 to 60° relative to the horizontal plane of the calender, and particularly approximately 45°. With such an angle, the height of the frame is less than a 10-roll calender having rolls vertically arranged one above the other, and the length is shorter than a calender having two 5-roll stacks arranged parallel to each other.
The frame can be arranged between the last drying cylinder and a winder, which are located at roughly the same height. By the angular inclinations the height of the frame is reduced enough such that the web can run between the drying cylinder and the calender, as well as between the calender and a winder, with a slight gradient. This in turn facilitates the feeding of the web, which is beneficial for online operation.
Preferably, the rolls are arranged on the inclined top of the frame. At least one roll is preferably displaceable at a right angle to the plane by an adjustment device. The roll can be moved out a relatively short distance such that it can be gripped directly by a crane and removed.
The present invention is directed to a calender for manufacturing a material web. A frame is supported at the top and bottom. At least five rolls are mounted on the frame such that axes of the rolls lie in a substantially common plane extending substantially parallel to the frame. The common plane extends at an acute angle relative to a horizontal plane.
According to features of the above embodiment, both the top and bottom of the frame are supported by bearing surfaces fixed to a floor. The bearing surfaces extend horizontally, and are formed by concrete footings. The frame has an upper support surfaces formed on a support foot, which is arranged near an upper end of the frame. A lower support surface is constructed directly on the frame.
The acute angle of the above embodiment preferably extends approximately 30 to 60° relative to the horizontal plane, and particularly approximately 45° relative to the horizontal plane.
Preferably, the frame is disposed between a drying cylinder and a winder, which are located at approximately the same height.
Also preferably, the at least five rolls are arranged on the top of the frame, and at least one of the at least five rolls is displaceable at a right angle to the common plane by an adjustment device.
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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Helmus Mathias
Hinz Joachim
Kayser Franz
Stock Gerhard
Gerrity Stephen F.
Greenblum & Bernstein P.L.C.
Voith Sulzer Papiertechnik Patent GmbH
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