EP1161888A2 - Method and device for feeding a connecting band with perforated zones for ventilated cigarettes - Google Patents

Abstract

Phase positions of first and second signal sequences are compared to detect a phase difference. If this difference deviates from a preset value, feed-in speed for perforated paper strip coatings (2) is changed. Each paper strip coating is pulled at a pre-adjusted speed off a rotating storage roller (4) with the help of two delivering rollers (6,8), one of which is driven by a driving mechanism (11) via a toothed belt (7). An Independent claim is also included for the device applying the method.

Description

The invention relates to a method for feeding a perforated section Covering paper strip in a filter attachment machine to a gluing device for Apply glue pictures with the perforated sections corresponding glue-free zones and to a cutting device that periodically from the Tipping paper strips Cut off tipping paper sections. The invention relates above In addition, a device for feeding a strip of covering paper perforated in sections in a filter attachment machine, with a gluing device for Apply glue pictures with the perforated sections corresponding glue-free zones, with a feed device for feeding the covering paper strip to the gluing device, with a cutting device for periodic separation of tipping paper sections from the tipping paper strip, with a first sensor for grasping the perforated sections or from them in a fixed assignment Markings arranged on the covering paper strip.

Such methods and devices are known from the prior art. For example, US 5,735,292 shows such a method and one such device.

From this state of the art it is known, after the gluing of the covering paper strip to record the position of the glue sections and in the event of a deviation of the Should the position of these glue sections be corrected accordingly. Two options are disclosed, such as the location of glue sections or glue images on a tipping paper strip relative to the cut, i.e. to Cutting frequency of a cutting device in a filter attachment machine, controlled can be.

To do this, in a certain position between a circumferential, accordingly the glue pictures to be applied with recesses Glue applicator roller and one revolving one Knife roller having cutting device the location of the glue-free zones or a perforation on the covering paper strip relative to the respective angle of rotation the knife roller detected. Deviations from a target position can then either by changing the angular position of the glue application roller relative to the angular position the knife roller and / or by changing the length of the conveying path for the Corrected covering paper strips between gluing device and cutting device become.

A disadvantage of this prior art is that when the position is corrected Glue patterns for cutting the position of the glue patterns to the perforated sections is also changed and a correction is now required here again and vice versa.

The above problem can arise with a monitoring and control arrangement according to US Pat. No. 5,735,292, only solved with considerable control expenditure , but the Scriptures do not contain any information.

The invention has for its object a method and an apparatus to improve the type mentioned at the beginning.

The above object is achieved by the method and the device according to the Claims 1 and 10 solved.

The invention makes use of the knowledge that with a fixed path length between Glueing device and cutting device for the synchronization of the working methods of the two devices only one matched to the respective topping sheet length one-time basic setting is necessary. Thereby, both for the phase difference between the frequency of occurrence of the perforated sections and the Cutting frequency of the cutting device as well as for the feed speed Preset values. The latter is based on the production performance of the filter attachment machine Voted. After this basic setting, it is possible thanks to the invention only by changing the feed speed of the tipping paper strip Glueing device and cutting device also during the continuous operation of the Machine tailored to the position of the perforations on the covering paper strip to let work. The invention thus ensures with little effort that both the position of the perforated sections and the glue patterns in or on the Covering paper strips to each other as well as to cut through the cutting device are correctly positioned.

According to a preferred embodiment of the invention, the position of the perforated sections in the covering paper strip before applying the glue patterns and ensures that the topping paper strip with synchronized accordingly Positioning of the perforated sections of the cutting device is fed, so is - due to the fixed by the basic setting made Synchronization between gluing device and cutting device - without one further monitoring and control also the synchronization of the perforated Given sections to the gluing device.

A preferred embodiment of the invention is characterized in that for synchronous positioning of the perforated sections to the cutting device The feed speed of the covering paper strip is changed by briefly pressing the Circumferential speed of the covering paper strips from a supply roll pulling take-off roller is changed accordingly. In this way realize the invention particularly easily.

Another advantageous embodiment of the invention changes the feed rate of the covering paper strip only if the deviation of the Phases from the given value a given tolerance amount exceeds. This way, an unnecessary one - because on a tolerable one Deviation Based - Avoid changing feed speed.

In an advantageous embodiment of the invention, at the same time the detection of the perforated sections or the associated markings Distances of the perforated sections or the associated markings detected. Here too, if the distances deviate from a predefined setpoint The supply speed of the tipping paper strip changed. This embodiment offers the advantage that a changed compared to the basic setting Distance between the perforated sections or the associated markings can be compensated on the covering paper strip.

So it is no longer necessary as in the prior art, with each change of a new basic setting for the bobbin provided with the covering paper strips the machine. Rather, thanks to the invention Deviations in the spacing of the perforations, including sample length (mostly about 27 mm), on the fresh bobbin opposite the bobbin with which the Basic setting of the machine has been made, can be tolerated. This is in State of the art not possible. Because the travel of the in US 5,735,292 disclosed stamp to enlarge the distance between there Glueing device and the cutting device there is limited. Such one Stamp is therefore not able without a long machine downtime basic setting required to compensate for the use of bobbins, whose pattern length differs from the basic setting. This is because Such deviations in the pattern length are mostly constant on the bobbins are present, so that with usual lengths of the covering paper strip on the Bobine of about 3,000 meters the deviations in the pattern length so add up that the known punch reaches its travel limits.

Is preferred as a sensor both for detecting the perforated sections or the assigned markings as well as for detecting the pattern length Double light barrier used.

Alternatively, the compensation described above can be changed Also achieve pattern lengths by moving the sensor in the direction of movement of the covering paper strip at a specified distance from the cutting device behind the gluing device, but in front of the cutting device, further preferred dense (i.e. a few sample lengths), is arranged in front of the cutting device and delivers the first signals. In this way there may be a deviation in the pattern length compared to the basic setting due to the proximity of the cutting device Do not add up the arranged sensor significantly. To in this embodiment to achieve a synchronization with the gluing is like with the embodiment mentioned above also a sensor in front of the gluing device for detecting the perforated sections or the assigned markings arranged. However, the first signals are only in this embodiment with a sequence corresponding to the application frequency of the gluing device third signals compared. In this embodiment there is therefore a Synchronization of the appearance of the perforated sections with the cut through Control of the feed speed of the covering paper strip with the help of the sensor behind the gluing device, while synchronizing the occurrence of the perforated sections with the glue pattern by controlling the application frequency of the Gluing device with the help of the sensor arranged in front of the gluing device takes place.

Further preferred embodiments of the invention are in the subclaims described.

The following is an embodiment of the invention with reference to the drawing explained.

Fig. 1

eine erste Ausführungsform einererfindungsgemäßen Vorrichtung in einer schematischen Seitenansicht;

Fig. 2

einen Abschnitt eines Belagpapierstreifens gemäß Fig. 1; und

Fig. 3

eine zweite Ausführungsform einer erfindungsgemäßen Vorrichtung in einer schematischen Seitenansicht.

The drawing shows:

Fig. 1

a first embodiment of an inventive device in a schematic side view;

Fig. 2

a portion of a covering paper strip according to FIG. 1; and

Fig. 3

a second embodiment of a device according to the invention in a schematic side view.

Fig. 1 shows a schematic side view of a first embodiment 1 of the Device according to the invention for feeding a section perforated Covering paper strip 2 in a filter attachment machine with a production output machine-coordinated speed. The device 1 is in following described using the path of the tipping paper strip 2.

The covering paper strip 2 is rotated about an axis 5 according to arrow 3 Supply roll 4 drawn off at a preset speed. The stripping of the covering paper strip 2 from the supply roll 4 is done with the help of a Draw roller pair 6 and 8. One of the two draw rollers, here the draw roller 6, is driven by a drive 11 via a toothed belt 7.

Before the covering paper strip 2 reaches the take-off rollers 6 and 8, it is over a deflecting roller 12 passed to a crusher 14. The crusher 14 breaks it Tipping paper strip 2 paper so that it later becomes easier around the filter-cigarette groups can be wrapped around.

A sensor 16 is arranged downstream of the take-off rollers 6 and 8 and is used for detection of the perforated sections 18 shown in FIG. 2 on the covering paper strip 2 serves. The sensor 16 is a light scanner, which is in the transmitted light or reflection method works on the perforated sections 18 or possibly the markings to recognize the covering paper strip 2.

Alternatively, the sensor 16 can be designed as a double light barrier in order to To detect the speed of the perforated sections, so as to turn together with the detected frequency of occurrence of the perforated sections 18 the distance L in the direction of movement 20 of the covering paper strip 2 (see FIG. 2) to be able to determine the perforated sections 18.

A gluing device is located at a fixed distance downstream from the sensor 16 22 for applying glue images to the covering paper strips 2 intended. The gluing device 22 has a glue nozzle 24, as it does for example in DE 44 37 764 A1, which corresponds to US 5,769,947 is. With the help of the glue nozzle 24, glue images are placed on the covering paper strips 2 applied, which have glue-free zones, the perforated sections 18 on the covering paper strip 2 correspond, so that on the perforated Sections 18 no glue is applied.

The covering paper strip 2 passes downstream of the gluing device 22 Deflection rollers 26, 27 and 28 to a cutting device 30 for periodic Separate not shown topping paper sections from the tipping paper strip 2. The cutting device 30 is in a fixed path length in the direction of movement 20 of the covering paper strip 2 arranged behind the glue nozzle 24. at always the same length of the covering paper strip 2 between the glue nozzle 24 and the Cutting device 30 is during the cut by a one-time basic setting the control of the glue nozzle 24, the glue pattern generated for the location of the Cut aligned.

The cutting device 30 has a knife drum 32 on its circumference arranged, slightly angled relative to the radial knives 34, and a counter-rotating drum 36 receiving the covering paper strip 2. The drum 36 has recesses 38 into which the knife due to the Distance of the drums 32 and 36 to each other during the rotation of the two Drums 32 and 36 can be immersed around the circumference of drum 36 separate seated covering paper strips 2. Below that on the scope of the Drum 36 provided support surfaces 40 has the drum 36 with a Suction device related suction holes 42 for holding the Covering paper strip 2 and the separated covering sheets 39 on the drum 36 on.

In a manner known from the prior art, a between the Deflection rollers 26 and 28 arranged and with the covering paper strip 2 in Contact oscillator 44 arranged and with the drums 32 and 36 synchronized to the covering paper strip 2 after each cut through one of the Knife 34 slightly against the direction of movement 20 relative to the drum surface hold back so that there is a gap between each cut Sections of the covering paper strip 2 arises. The oscillator 44 thus converts the uniform supply of the covering paper strip 2 to the gluing device 22 in one non-uniform feed to the cutter 30 µm. Details of the cutting device 30 and the oscillator 44 can DE 39 18 137 C2 (that of US 5,054,346 corresponds).

The device 1 works as follows:

Before applying the glue patterns with the aid of the glue nozzle 24, the in one fixed distance from the glue nozzle 24 arranged sensor 16 the sequence of perforated sections 18 on the covering paper strip 2 detected. Alternatively, it would be possible, in fixed association with the perforated sections 18 in the illustrated Embodiment not used on the topping paper strip 2 to detect arranged markings with the aid of the sensor 16. From that of that Sensor 16 detects sequence of perforated sections 18 on the tipping paper strip 2, with the aid of a computer and control unit 50, a sequence of first signals formed.

At the same time, with the help of a sensor 52, the peripheral speed of the Drum 36 and thus the cutting cycle of the cutting device 30 is detected and a corresponding sequence of second signals to the computer and control unit 50 issued. The sensor 52 is a proximity initiator that works with a clock disc 51 cooperates. In the computer and control unit 50 the phase position of the sequence of first signals from sensor 16 with the phase position the sequence of second signals from the sensor 52 compared. If this becomes a Deviation of the phase positions from a reference value is determined using the computer and also acting as a control device for the drive 11 Control unit 50 briefly the number of revolutions via an electrical connection 53 of the drive 11 changed so as to move the tipping paper strip 2, i.e. its feeding speed by changing the peripheral speed of the Pull roller 6 to synchronize with the cut.

In this way, it is ensured according to the invention that the knife 34 introduced separating cuts in synchronism with the perforation sections 18 on the Base paper strips 2 are executed. By the through the oscillator 44 varying between the individual cuts of the knife drum 32 when respective section of the knife drum 32, however, the same length of each Covering paper strip 2 between the glue nozzle 24 and the position of the cut the knife drum 32 has the advantage of the invention that due to the synchronization of the positions of the perforated sections 18 with the Cutting device 30 also synchronizes the perforated sections 18 with the glue images applied by the glue nozzle 24 is achieved without a further monitoring and controlling the positions of the perforated sections 18 relative to the glue nozzle 24 is necessary.

Line 54 symbolizes the electrical control of a not shown Valve of the glue nozzle 24 to synchronize this valve with the help of the Knife drum 32 in the covering paper strips 2 introduced cutting sequences Control cutter 30. If the gluing device 22 is is a gluing device with a glue roller, this is with the machine drive the device 1 kinematically firmly connected.

2 shows a piece of a covering paper strip 2 which is not to scale perforated sections 18 and with imperforate sections 18a. Perforated and imperforate sections together form a pattern with a pattern length L.

3 shows a second embodiment 100 of a device according to the invention in a schematic side view. Parts related to the embodiment of the figure 1, are denoted by the same reference numerals and are here not described again.

Deviating from the embodiment 1 acc. Figure 1 is in the embodiment 100 acc. Figure 3 in addition to the sensor 16 for detecting the perforated Sections or the assigned markings on the topping paper strip 2 Sensor 55 downstream of the gluing device 22, but upstream of the cutting device 30 provided. The sensor 55 also detects the perforated Sections 18 and the associated markings on the topping paper strip 2. In this way there is a deviation of the pattern length L from a preset one Value tolerable because sensor 55 is so close to cutting device 30 finds that such deviations are not beyond a tolerance can add up. Alternatively, such a deviation can also be measured the length L and its use to change the feed speed of the Covering paper strip 2 can be compensated, for example by the sensor 16 (as above mentioned) also measures the speed of the covering paper strip 2.

In embodiment 100, therefore, two sequences of the sequence of the perforated sections 18 corresponding first signals generated. In the Embodiment 100, however, only the first signals from sensor 55 are applied to the described with reference to Figure 1 with the sequence of second Signals of the sensor 52 compared and used to control the drive 11.

The first signals of the sensor 16, on the other hand, are in a further control unit 17 only with that supplied to the control unit 17 via a line 19 Application frequency of the glue nozzle 24 compared. That lies out of this comparison Resulting phase difference between the frequency of the passing through the sensor 16 perforated sections 18 and the application frequency of the glue nozzle 24 outside a predetermined tolerance value, the gluing device 22 is over the Line 21 by means of the control device 17 causes the order frequency to change accordingly.

Claims (17)

Method for feeding a piece of perforated covering paper strip (2) in a filter attaching machine to a gluing device (22, 24) for applying glue images with glue-free zones corresponding to the perforated sections (18) and to a cutting device (30) which is periodically separated from the covering paper strip (2 ) Cut off the covering paper sections,
characterized in that the perforated sections (18) or markings arranged in a fixed association therewith on the covering paper strip (2) are detected at at least one location and a corresponding sequence of first signals is formed in each case,
that a sequence of second signals corresponding to the cutting frequency of the cutting device (30) is formed,
that the phase positions of the sequences of first and second signals are compared to determine a phase difference between the phase positions, and
that if the phase difference deviates from a predetermined value, the feed speed of the covering paper strip (2) is briefly changed. Method according to claim 1,
wherein to form the sequence of first signals, the perforated sections (18) or the associated markings are recorded at a fixed distance from the gluing device (22, 24) before the glue images are applied. Method according to one of the preceding claims,
the distances (L) of the perforated sections (18) or the associated markings being determined,
and if the distances (L) deviate from a predetermined value, the feed speed of the covering paper strip (2) is changed. Method according to claim 3,
wherein to determine the distances (L) of the perforated sections (18) or the associated markings, the instantaneous speed of the covering paper strip (2) is detected. Method according to claim 1,
wherein to form the sequence of first signals, the perforated sections (18) or the associated markings after the application of the glue images, but before the separation of the covering paper sections (2) are detected at a fixed distance from the cutting device (30). Process according to claims 2 and 5,
wherein a sequence of third signals corresponding to the application frequency of the gluing device (22, 24) is formed,
the phase position of the sequence of first signals recorded prior to the application of the glue images is only compared with the phase position of the sequence of third signals for determining a phase difference between the phase positions,
if the phase difference deviates from a predetermined value, the application frequency of the gluing device (22, 24) is briefly changed,
the phase position of the sequence of first signals recorded after the application of the glue images is only compared with the phase position of the sequence of second signals for determining a phase difference between the phase positions, and
if the phase difference deviates from a specified value, the feed speed of the covering paper strip (2) is briefly changed. Method according to one of the preceding claims,
the feed speed being changed by controlling the peripheral speed of a take-off roller (6, 8) pulling the covering paper strip (2) off a supply roll (4). Method according to one of the preceding claims,
wherein the feed rate is changed only when the deviation of the phase difference from the predetermined value exceeds a predetermined tolerance amount. Method according to one of the preceding claims,
the feed speed serving as an actuator of a control circuit for regulating the position of the perforated sections (18) or the associated markings relative to a cutting position of the cutting device (30). Device for feeding a strip of covering paper (2) perforated in sections in a filter attachment machine,
with a gluing device (22, 24) for applying glue images with the glue-free zones corresponding to the perforated sections (18),
with a feed device (6, 8) for feeding the covering paper strip (2) to the gluing device (22, 24),
with a cutting device (30) for periodically separating covering paper sections from the covering paper strip (2),
characterized by at least one sensor (16, 55) for detecting the perforated sections (18) or of markings arranged in a fixed association therewith on the covering paper strip (2),
first signal generating means (50) for generating in each case one of the sequence of first signals corresponding to the perforated sections (18) detected by the at least one sensor (16, 55) or the associated markings, second signal generating means for generating one of the cutting frequency of the cutting device (30) corresponding sequence of second signals,
first comparison means (50) for comparing the phase positions of the sequences of first and second signals and for generating first comparison signals, and first control means (50) connected to the first comparison means (50) for briefly changing the feed speed of the covering paper strip (2) depending on Deviations of the first comparison signals from a predetermined value. Apparatus according to claim 10,
wherein the sensor (16) is arranged in the direction of movement (20) of the covering paper strip (2) at a fixed distance from the gluing device (22, 24) in front of the gluing device (22, 24). Device according to one of claims 10 or 11,
the sensor (16) being designed such that the distances (L) between the perforated sections (18) or the associated markings can also be determined with its help in the direction of movement (20) of the covering paper strip (2),
with second comparison means for comparing the distances (L) with a predetermined value and for generating second comparison signals, and
with second control means connected to the second comparison means for briefly changing the feed speed of the covering paper strip (2) as a function of deviations of the second comparison signals from a predetermined value. Device according to claim 12,
wherein the sensor (16) for determining the distances (L) is designed to detect the instantaneous speed of the perforated sections (18) or the associated markings. Device according to one of claims 12 or 13,
wherein the second comparison means and / or the second control means are at least partially identical to the first comparison means (50) and / or the first control means (50). Apparatus according to claim 10,
wherein the sensor (55) is arranged in the direction of movement (20) of the covering paper strip (2) at a fixed distance from the cutting device (30) behind the gluing device (22, 24), but in front of the cutting device (30). Device according to claims 11 and 15,
with third signal generating means (22) for generating a sequence of third signals corresponding to the application frequency of the gluing device (22, 24),
with third comparison means (17) for comparing the phase positions of the sequence of first signals detected by means of the sensor (16) arranged in front of the gluing device (22, 24) only with the phase position of the sequence of third signals and for generating third comparison signals,
with third control means (17) connected to the third comparison means (17) for briefly changing the application frequency of the gluing device (22, 24) as a function of deviations of the third comparison signals from a predetermined value,
the first comparison means (50) only comparing the phase position of the sequence of first signals detected by means of the sensor (50) arranged behind the gluing device (22, 24) with the phase position of the sequence of second signals. Device according to one of claims 10-16,
the control means (50) including a take-off roller (6, 8) for pulling off the covering paper strip (2) from a supply roll (4).

Images