SU929777A1 - Paper web greasing device - Google Patents

Description

(W) DEVICE FOR FASTENING A PAPER CLOTH

The invention is intended for crafting a paper web in an extended direction and will find use in the pulp and paper industry. A device is known comprising pivoting rollers covered with a conveyor made of an elastic material installed along the movement of the paper web and a cylinder that presses the web to the ij conveyor. However, in connection with so that the elastic of the conveyor belt is stretched along the web movement, creping is carried out across the web, and the paper in the longitudinal direction has the greatest fullness. Thus, additional creping of paper in the same direction does not give the desired effect, since in the transverse direction the paper still does not have the necessary strength and is subject to the danger of tearing. Closest to the invention is a device for creping a paper web, comprising two conveyors with tension rollers, the endless bands of which are provided with reinforcing ropes. The device has caissons containing compression chambers, which are installed on the side of the working branch of the conveyor, which is opposite to the paper web. With the pressure of the compression chambers on the conveyor belt, the tape is stretched in the transverse direction; in the longitudinal direction, the tape is not stretchable due to the ropes. When squeezed, the ribbon increases or decreases relative to the paper tightness. Due to this, the paper web that is passed through between the belts of the upper and lower conveyor is stretched or compressed 2. Although the creping on this device is carried out in the longitudinal direction, it is not of sufficient quality. This is due to the fact that the clamping force of the swivel rollers is removed.

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leads to tape narrowing and crepe wrinkling. However, the folds formed are not compacted and the quality of creping decreases. If, however, the efforts are not reduced, the tape will not be narrowed in this area, and folds will not be formed either.

In addition, the device has a complex structure due to the presence of caissons. ..

The purpose of the invention is to simplify the design of the device and increase the value of its work. .

. This goal is achieved by the fact that in the device for creping no, containing two. a conveyor with tension rollers, the endless elastic bands of which are provided with reinforcing ropes, the reinforcing ropes are attached to the inner surface of the elastic conveyor belts, and the tension-ridges have grooves in which the reinforcing ropes are placed, and the distance between the grooves first the movement of the creped web of the rollers exceeds the distance between the grooves of the next rollers.

FIG. 1 shows the device, a general view; in fig. 2 is a sectional view: L-A in FIG. one; in fig. 3 a section BB-B in FIG. one.

The device contains conveyors 1 installed one above the other above and under the paper web. Conveyors bend around rotary rollers 2 and 3. .. Conveyor belts are made of elastic material. Under the conveyor belts in the longitudinal direction are ropes C fixed on the belts. Valiki .2 and 3 are provided with grooves, and the pitch between the grooves of the shaft 3 exceeds the pitch between the grooves on the shaft 2. In the grooves are ropes k.

The device works as follows.

A sheet of paper with a moisture content Q% is fed into the gap between the two belt conveyors under the front rollers 3 where the belts are in the stretched state (ropes k, are in the grooves, push the ribbon out of elastic material). .

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The paper being clamped between the two branches of the conveyors narrows as they move, as the belts also taper from roller 3 to roller 2. Rope k, switching to roller 2, shortens the distance between them.

The paper, narrowing between the conveyor belts, becomes wrinkled along the web of paper (creped). In this case, the longitudinal folds formed on the paper are fixed under the action of the pressing force of the rollers 2.

The size of the support depends on the difference in distance between the grooves of the front 3 and rear 2 rollers. Consequently, the size of the folds can vary in a large range, and since the crepe is fixed by rotating rollers, the quality of creping on the proposed device is higher than on the known ones.

With the improvement of creping, sack paper will increase its strength, which will allow making paper bags in which instead of four layers of paper there will be three layers.

Claims (1)

1. US Patent No. ZOPZ B, cl. G62-361, TE. 2, USSR Author's Certificate No., cl. D 21 F 11/00, 1965 (prototype). WW-W  I, I I f II ; N H Figure 1 Ф11 & .3