DE1295455B - Device for loosening a continuously crimped fiber strand to be used as a cigarette filter - Google Patents

Description

1 2

The invention relates to a device for applying the continuously crimped fiber strand 13 with the aid

loosening a continuously crimped fiber strand from cooperating tension rollers 14

for cigarette filters using needles, and 15 is pulled through. The one between the

which engage in the fiber strand. Bands 1 and 2 existing gap can be with

It is already known to use a multilayer 5 aid of the front rollers 3 and 4, the intermediate filter body perforate with needle rollers to rolls 5 and 6 and the rear rolls 7 and 8 on the one hand change the fiber layer with the carrier layer according to the thickness of the fiber strand. Yes connect and on the other hand the filter properties but the gap between the bands 1 and 2 is of by lengthening the smoke path to the front rollers 3 and 4 to the intermediate improvers (German interpretation document 1 087 959). Io rolls 5 and 6 essentially the same, this device is therefore not the filter material while it is from the intermediate rollers 5 and 6 to the loosened up, but rather connected to one unit. rear rollers 7 and 8 by adjusting the

There is also already a method of tearing rolls 7 and 8 gradually increasing to make the fiber pure Part of the fibers in a fiber strand with strand in its advance between the ribbons on the aid a needle roller known (Swiss 15 loosen.

Patent 353 296). A partially torn ligament can be tensioned with the help of the As a cigarette filter, however, the strand must set control or tensioning rollers 9 and 10 under strong pressure. Of the or be strengthened again in another way, as the drive mechanism operates at an uneven speed otherwise the torn fibers close to the causes in addition to the intermittent uneven Filter end would be sucked out when smoking. 20 speed, which is determined by the Maltese cross gear 11,12 If any loosening is achieved at all, and using it (as shown) their effect is canceled out in the finishing of a crank mechanism, an elliptical tooth, at least weakened. wheel or some other mechanism for a

The invention is based on the problem of an uneven speed of cooperating tooth device to create that comes about with simple means 25 wheels, the forward movement of the an intermittent longitudinal compression and an upper and lower band within one Combing the fiber strand allows. such range that the difference between the

To solve the problem, it is proposed that the forward speed of the tape in question and

the needles at a certain distance from each other on the forward speed of the fiber strand as a result

each side of two endless belts are arranged, 30 the action of the tension rollers and the difference

with the belts facing each other, in the forward speed between the upper one

Fiber strand engaging needles over a first and the lower band the crimped state of the

Do not let the section with a substantially constant distance fiber material be lost and the

and over a second section with a steady winding through the needles 16 and 17 of the respective band

Larger distance from each other and loosen 35 held fiber strand 13. For example

are driven intermittently. if one takes the circumferential speed of the

Such a device allows rolling with simpler than the standard speed, with itself Means a loosening of the fiber strand without the upper and the lower belt in their leading application the conventional working through at speed compared to the standard speed compressed air or special vibrators. The invention can be changed by ± 8% and also appropriate Device delivers one that can be driven alternately so that at loosened, uninjured fiber strand. high speed of the upper belt the lower

The invention will hereinafter be revolved by means of a low speed belt so that In the exemplary embodiment shown in the figures, the fiber strand is explained in more detail in an intermittent and finely dimensioned manner. It shows 45 is tightened or loosened.

F i g. 1 is a schematic side view of the invention. As shown in FIGS. 2 and 3 shown have the

according to the device, bands 1 and 2 each have a base on which with the help

2 shows a partial section through the needles 16 and 17 in the case of the fastening means 18 according to the invention

proper device to be used, are attached. If the needles are too thick,

Needles occupied tape and 5 ° arise in the fiber strand knobs, d. H. bead-

F i g. 3 is a partial side view showing an example of a type of elevation so that one preferably

Illustrated needle part of the needle tape. thinner needles used, expediently

The in F i g. 1 shown prior to those with a length of approx. 5 mm, since the needles

direction for loosening the fiber material is too deep in the fiber strand if the length is too great

from the belts 1 and 2, the front rollers 3 55 penetrate and cause the fibers to tear

and 4, the intermediate rollers 5 and 6, the rear ones and they, on the other hand, if the length is too short, none

Rollers 7 and 8 and the control or tensioning rollers 9 loosen the fiber strand sufficiently

and 10, which can essentially act opposite one another. The needles are preferably as in

borrowed are arranged symmetrically, as well as the F i g. 3 shown in the direction of advance of the tapes

Maltese cross gear 11, 12 for the intermittent 60 opposite direction slightly inclined. the

the drive of the upper and lower belt. in Fig. 3 needle shown with an approximately in the

This gear contains a pin wheel 12 with two reinforced ones beginning at half the height of the needle

at the symmetrically opposite inclination of the upper part of the needle in

Pins for alternating drive from two in the same direction as the inclination or

lamellar gears 11, one of which is the 65 inclination of the entire needle causes a better

upper band 1 is assigned, while the other holding the fiber strand and is to achieve the

the lower band 2 with the help of two loosening the fiber material together very advantageous,

acting gears 19 and 20 is assigned and on the other hand, an angle of inclination that is too large is

opposite direction not desired, otherwise the fibers will tear.

To increase the loosening ability, for example, two according to FIG. 1 shown Devices according to the invention according to the condition of the fiber strand and the intended one Purpose of use can be combined with each other.

Claims (1)

Claim: Device for loosening a continuously crimped fiber strand for cigarette filters using needles that engage in the fiber strand, characterized in, that the needles (16, 16) are arranged at a certain distance from one another on each side of two endless belts (1,2), wherein the bands (1, 2) with facing needles engaging in the fiber strand over a first section (3, 4 to 5, 6) with a substantially constant distance and over a second section (5, 6 to 7, 8) arranged with a constantly increasing distance from one another and are driven intermittently. 1 sheet of drawings