US 7,243,404 B2 · Web-spreading process and web-spreading device

Abstract

A web-spreading device and a web-spreading process are provided. The web-spreading device, is provided whereby a first web strand being conveyed and a second web strand being conveyed next to the first web strand in a web-processing machine can be offset in parallel to one another in order to set a spread. A frame supports a first deflecting device (5r; 5r′), which forms a first deflection axis for the first web strand (Br), and a second deflecting device (6r; 6r′), which forms a second deflection axis for the first web strand (Br), which deflection axis is the next deflection axis for the first deflection axis in the conveying direction (F). The first web strand (Br) is offset in parallel by wrapping around the deflecting device (5r, 6r; 5r′, 6r′) and the spread (X; X+Y) is thus set in its entirety or in part. At least one of the deflecting devices (5r, 6r; 5r′, 6r′) is mounted adjustably along an adjustment path in the frame (2) in order to set the spread (X; X+Y). The adjustment path is straight in its entirety or at least in one section and extends in the conveying direction (F) which the first web strand (Br) has between the deflecting device (5r, 6r; 5r′, 6r′).

Claims23

Dependent claims

A web-spreading process, comprising the steps:

a) conveying a first web strand and a said second web strand next to one another in a web-processing machine and offset in parallel to one another by a spread;
b) wrapping the first web around a first deflecting means, which forms a first deflection axis, and a second deflecting means, which is a next deflecting means downstream along the web and forms a second deflection axis, each of the first deflecting means and the second deflecting means having a wrapping angle and providing a first web parallel offset;
c) adjusting at least one of the first deflecting means and second deflecting means from a first position into a new, second position, in which the first web strand travels between the first deflecting means and the second deflecting means over a path length that is different from that in the first position, but maintaining a conveying direction so that the spread is adjusted, but said wrapping angle is not changed by the adjustment of said at least one of the first deflecting means and second deflecting means.

A web-spreading device by which a first web strand being conveyed and a second web strand being conveyed next to the first web strand in a processing machine can be offset in parallel to one another in order to set a spread therebetween, the web-spreading device comprising:

a frame;
a first deflecting means which forms a first deflection axis for the first web strand;
a second deflecting means which forms a second deflection axis for the first web strand, said deflection axis being the next deflection axis to the first deflection axis in a conveying direction of the first web strand, the first web strand being offset in parallel by wrapping around the first deflecting means and second deflecting means to set the spread in its entirety or partially;
an adjustment device with adjustment path, at least one of said first deflecting means and second deflecting means being mounted adjustably along an adjustment path in the frame in order to make it possible to adjust the spread, said adjustment path being straight in its entirety or at least straight in one section and extending in a conveying direction of the first web strand between the first and second deflecting means.

1 more element

Dependencies are inferred from the claim text.

Web-spreading process and web-spreading device

Life of this patent

Web-spreading process and web-spreading device

Life of this patent

Abstract

Claims23