DE28145C - Dewatering rollers on the wire of the paper machine - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS S§: Paper manufacture.

Patented in the German Empire on January 30, 1884.

In Fig. Ι, which represents a known device of the paper machine, A denotes the lower wire, B the upper wire, C the upper couch roll, D the lower couch roll, E and E ¹ the pre-couch roll pair, FGH and J pre-pressure roll pairs, LL ... IS guide rollers for the lower wire, MM guide rollers for the lower wire A, and NN guide rollers for the upper wire B; O Tension roller for the top wire B.

Fig. Ζ is a schematic representation of the innovation. In this arrangement, only lower sieve A is used; the lower couch roll D is set in motion as usual by a belt and drives the upper couch roll C, the two pre-pressure rolls P and Q and the pre-couch E ¹ by friction in the direction indicated by arrows.

Under the action of the pre-pressure rollers P and Q , so much water is priced out of the still loose whole fabric that the material can no longer be squeezed or shifted between the couch rollers, an arrangement which enables the production of paper or light cardboard on one and the same different rollers described above allowed.

The whole product arrives at the guide roller Z, FIG. 2, from the last roller J, FIG. 1.

In Fig. 3 a similar arrangement is shown, only here an upper sieve B is used in the manner shown.

It is also used to produce paper and, at the same time, thin or medium-strength cardboard. With this arrangement, the sieves have little to pull because the pressure rollers are all set in motion by friction from the lower couch and drive roller D , and very greasy materials can be processed on this machine without interference.

Fig. 4 shows a schematic representation of the arrangement of dewatering rollers, pre-pressure rollers, Pre-couch and couch rollers, which are used in the manufacture of thick cardboard (up to 5 mm thick).

As can be seen, the rollers FGH are laid out in such a way that screens A and B make an undulating motion as they pass through these rollers.

The known device shown in FIG. 1 can be modified by running away the upper rollers FG HJ and bringing three of them approximately into the position shown in dotted lines.

In Fig. 4, the first two drip rollers F and G are each provided with one of the known devices in order to be able to press them more or less against the sieves and the material passing between them, which may also apply to the other rollers GH .

The water is successively withdrawn from the substance between the two sieves and can dissolve as a result, no longer eat or move afterwards.

From the last lower drip roller J the fabric passes between the first pair of form rollers RR ^x and from there to the second pair of form rollers .S .S '. From here it goes again over a drip roller T, which tensions the sieves and the fabric one last time, to and from the pre-couches

further through between the couch rolls, d. H. the upper and lower sieve go over hers respectively Guide or guide rollers back to the tension roller, the paper or cardboard to the Drying cylinders.

To the first drip roller respectively. between the upper and lower sieve Ä * B ¹ , Fig. 4, the fabric comes from the last guide or guide ^{roller Z 1 of} the known device, Fig. 1. So that the sieves do not need to pull the Vorgautschwalzen, the lower Vorgau Tsch roller set in motion by a friction roller V which is pressed by some known mechanism against the direct drive roller, the lower couch D.

Claims (2)

Patent Claims: 1. The use of the special dewatering rollers PQE ¹ , Fig. 2 and 3, on the upper couch roll. 2. On paper machines with an upper wire, the use of dewatering rolls, such as FGH, Fig. 4, which lie on the wire without a supporting lower roll, as well as the drive of the pre-rubber press EE 'by the friction roll. 1 sheet of drawings.