DE166023C - - Google Patents

Description

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The present invention has an apparatus for cutting a rod of cigarettes which is uniformly advanced in a cigarette machine to the subject. It is well known in such devices required that the knife or knives during penetration in ilen and during retreat from the evenly advanced cigarette rod of the longitudinal movement of the latter must follow in order to achieve a straight and exactly right-angled cut. For this it is important that even with large Speed and, if there are large fluctuations in the machine, a corner or

»5 Tilting of the knife frame and the slide made impossible, or at least on one harmless measure is pressed down. Furthermore, it is always necessary to achieve a correct one Cut required that the through a pre-

ao thrust curve taking place displacement of the knife carriage that of the evenly the strand to be cut off, can be adapted to different cigarette lengths without that an undesired exchange of the feed curve is necessary for this After all, for a clean cut it is also necessary that the one for the cutting indispensable nodding movement of the knife or knives at the right time and

3 «» is carried out in such a way that damage of the strand being moved cannot occur.

In the known cutting devices in which the carriage by only one lifting '.

datimen is moved lengthways, you can only corner or tilt through j

can prevent very strict fitting of all parts, which, however, the operation of the device very difficult and causes rapid wear of the parts.

According to the present invention, a corner or tilting of the not strictly fitted knife carriage is eliminated in that the feed curve causing the longitudinal displacement is provided with two or more displaceably acting points and that two or more mutually offset lifting thumbs are arranged in such a way that the feed curve simultaneously against it works and thereby displaces the measuring slide quite evenly. The lifting thumbs are connected to one another by a closed housing which can be slid tightly and without jolts on a cylinder carrying the feed cams and suitable guides. Moreover, the cam lever such ^are arranged so that the advance of the blade carriage can be increased or decreased by the fact that the Hcbcdaumcn are eccentrically mounted and moved toward the cam by rotation during the passage against the feed curve or can be turned away therefrom. , ·

Lifting thumbs are also provided for the nodding movement of the knives the main shaft obtained from rotation by means of the same gears and so relative to the the displacement of the slide causing cam are adjustable that the knife penetrate the strand in good time with every change in the carriage stroke, while a tension spring the knives before the start of the carriage return

Claims (4)

> ■ j. I 'I 'Ii ! I. ganges from the path of the moved Strand brings. In the drawing is an embodiment of the present cutting device shown. Fig. 1 shows an order view with partial cross-section, Fig. 2 shows a longitudinal section with the knife and their carriers completely free, and Fig. 3 shows an end view with partial cross-section, while Fig. 4 shows a detail. On the main ^{drive shaft 1} sits a cylinder, which on its one end face carries the thrust curves α provided with two or more simultaneously acting points and is enclosed by a housing b , on which the cutting knife h and at the same time the guide tube i ^l for forming the counter-knife the strand i to be cut (Fig. 3) ao are arranged. The housing b rests, except on the shaft a ^% and the feed cylinder, on the rods b * b " and supports two (or more) Hcbcdaumcn c in such a way that the feed curve α simultaneously against all, "25 acts, for example, through the action of a spring / (Fig. 2) on the former pressed lifting thumb to achieve a very even longitudinal displacement of the slide. The housing b is partially filled with oil and thus enables, besides a dust-free closure , a constant oiling of the cams and lifting thumbs, whereby their wear is reduced as far as possible. The lifting thumbs c are eccentrically mounted on their support d rotatable in the housing b and can be moved back or away from the curve α during the course by rotating their support d in order to achieve a change in the carriage stroke corresponding to the respective desired cigarette length without having to change the feed cam. The adjustment of the lifting thumb c is effected by a stone d ¹ seated on its carrier d , which slides in a groove k arranged outside the carriage, which can be opened as required, e.g. B. as Fig. 3 and 4 show, by means of a rack and pinion / can be brought from the horizontal in a more or less inclined position. If the groove k is horizontal, as shown in full lines in FIG. 4, the lifting thumb position does not change when the slide is displaced, whereas the groove k is rotated upwards into the position shown in dotted lines in FIG. 4, S ^ the stone d ¹ must slide upward in the groove k when the slide is displaced, which results in such a rotation of the carrier d that the lever thumb c is moved towards the curve α ; this leads to an increase in the slide stroke. By moving the grooves k downwards, the lifting arms c are more turned away from the curve α when the slide is displaced, and consequently the slide stroke 6g is reduced. Instead of the lifting thumb by spring action with the VoPsclnibkurvc in contact hold *, the latter can be in the form of a groove which the lifting arms at the fore and aft Reverse gears. It goes without saying that with one revolution of the curve. the sled like that is often pushed back and forth, attached as curve peaks and valleys in the cylinder are. The cutting knives It sit on frames g which are pivotably mounted at m and which are held in the position shown in FIG. 3 by a spring η. In order to ensure that the knives h safely penetrate the strand in good time during the Schlittcnvorganges and cut it, but are outside the area of the advancing strand when the carriage retreats, a shaft e ^l equipped with a lifting thumb c is provided. The latter is driven from the main ^{drive shaft α 1} by means of the same gears. The Hcbf claumcn c act in their rotation in the Pfcilrichtung Fig. 3 alternately against a roller arranged on the back of the knife frame in such a way that the knives perform the nodding movement required for cutting and, after the thumb c has released the roller, the spring η in the rest position, Fig. 3 are brought back. In the present arrangement, the two gears on the cam disk shaft and on the thumb shaft offer a very convenient means of changing the position in good time ^! to bring about the lifting thumb e corresponding to the respective Schliftehub. It is sufficient for this to disengage the two wheels and to move one tooth further in one direction or the other as required and to re-establish the engagement, so that an adjustment of the Hebcdaumcn relative to the cam disk is effected in a short time and thus the point in time for the execution of the nodding movement can be determined as required for the respective cigarette length to be achieved. The wear of the circular knives is counteracted by the adjustable ability of the knife frame rearward extension sufficiently taken into account. ___ ■ Patent claims: i. Device for cutting a steadily moving cigarette Strand, characterized in that several curves on the Mcsserschlittcn arranged Ilebedaumcn at the same time and move evenly, for the purpose of always having a perfectly even longitudinal displacement to achieve the sled. 2. Device for cutting a uniformly advanced cigarette rod according to claim i, characterized in that the lifting thumbs are connected to one another by a closed housing, which allows a dust-free closure and constant oiling of the curves and lifting thumbs, for the purpose of the wear of curves and Hebc- 'dauinen as possible to reduce. 3. A device for cutting a uniformly advanced cigarette rod according to claim 1, characterized in that the lifting thumb is eccentrically mounted and BEZW in the slide . are adjustable in the latter forming housing so that the stroke of the slide can be changed as desired without having to replace the curve as causing the slide displacement. 4. An apparatus for cutting a uniformly ^N continues moving Zigareltcnslrangcs according to claim 1, characterized in that the Daumcnschcibc fer to Ilervorrufung (pitching motion of the blade-supporting shaft is driven from the main shaft by means of the same gears to the purpose of achieving timely pitching motion of one of the TEI. depended on the gears to quickly effect the adjustment of the thumb disc relative to the cam disc. 1 sheet of drawings.