DE211651C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 55 ^. GROUP

Screen cylinders for paper machines. Patented in the German Empire on December 10, 1908.

For this registration, the examination according to the Union Treaty of

March 20, 1883

the priority

Recognized on December 14, 1900 on the basis of its registration in the United States of America on January 22, 1908.

The new screen cylinder is shown in the drawing

Fig. Ι shown in a diagrammatic side view.

Fig. 2 is a cross-section of a broken part on an enlarged scale.

The grid-like frame b are on the shaft α of the screen cylinder. attached. With this frame, the known longitudinal partitions b ^{1 are} connected, which rest at their inner end on the shaft α and which form the individual intermediate compartments b ² . This frame supports the sieve pad. The outer edges of the partitions b ¹ are slotted in order to receive the rings ^ which are grooved on their periphery for the purpose of receiving the rods e . These rods e run in the direction of the axis of the cylinder. On their outer sides, as indicated at e ¹ , they are provided with grooves on which a wire f is wound over the rod. The edges of the partitions b ¹ protrude a little over the upper edge of this rod e and are grooved so that the depth of the grooves is at least equal to or slightly larger than the diameter of the wire /, so that the through the grooves in the edges of the partitions b ¹ through wire at least flush with

the edges of the partitions and thus the edges of the partitions are the highest

Make points around the perimeter of the frame. A fine sieve h (fine wire gauze or even better silk fabric) is arranged on this frame. This sieve h is firmly applied and attached at its edges so that it is immovable.

On the sieve h over each edge of each partition b ¹ packing material m is provided, for example cotton tape, which is held in place by a wire or thread i wound over the sieve drum, so that the strips m against the sieve h and this tightly against the edges of the partition walls b ^{1 is} pressed.

These screen cylinders are used under conditions in which the various compartments δ ² , which are formed by the partitions b ¹ , are exposed to a suction and blowing effect at different times of the rotation of the screen cylinder. It is essential here that each compartment b ² is isolated from the neighboring one in such a way that the force of the blowing or suction does not act from one compartment over the edges of the partitions and under the sieve after the other. This isolation of the individual departments has presented extraordinary difficulties so far. According to the present invention, however, any leakage of each section with respect to the other by the use of packing strips m prevents

which are passed directly on the surface of the sieve h over the edge of the partitions δ ¹ and are attached to the sieve h by external wires or threads i.

Claims (1)

Patent claim: Screen cylinder for paper machines, in which individual cells are formed by radial partitions, characterized in that a strip (m) of packing material is placed on the edge of each individual partition (b ^l ) directly above the screen (h), which strip (m) of packing material is placed through a wire that is led around or thread (i) is held and the sieve (h ) presses against the longitudinal edge of the septum (b ^1). 1 sheet of drawings.