EP1161888B1 - 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 sectionally perforated Tipping paper strip in a filter attachment to a Beleimeinrichtung for Applying glued images corresponding to the perforated sections glue-free zones and to a cutting device that periodically from the Tipping paper strip Separates tipping paper sections. The invention relates to it an apparatus for feeding a partially perforated tipping paper strip in a filter attachment machine, with a Beleimeinrichtung for Applying glued images corresponding to the perforated sections glue-free zones, with a feeding device for feeding the tipping paper strip to the gluing device, with a cutting device for periodic separation tipping paper sections from the tipping paper strip, with a first sensor for grasping the perforated sections or of them in fixed association Markings arranged on the tipping paper strip.

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

From this prior art, it is known, after gluing the tipping paper strip to record the position of the gluing sections and in the case of a deviation of the Sollage these gluing sections to correct the position of the glue sections accordingly. There are two ways disclosed, such as the location of glue sections or glue patterns on a tipping paper strip relative to the cut, i. to Cutting frequency of a cutting device in a Filteransetzmaschine, controlled can be.

This is done in a certain position between a one circumferential, corresponding provided with recesses on the glued images to be applied Glue applicator having Beleimeinrichtung and a circulating Knife roller having cutting device, the location of the glue-free zones or a perforation on the tipping paper strip relative to the respective angular position the knife roller detected. Deviations from a desired position can then either by changing the angular position of the glue applicator roll relative to the angular position the knife roller and / or by changing the length of the conveying path for the Taper paper strip between Beleimeinrichtung and cutter corrected become.

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

The aforementioned problem can be found in a monitoring and control arrangement solved according to the US-PS 5,735,292 only with considerable technical control effort what the scripture contains but no clues.

The invention is based on the object, a method and an apparatus of to improve the type mentioned above.

The above object is achieved by the method and apparatus according to the Claims 1 and 10, respectively.

The invention makes use of the knowledge that with a fixed path length between Gluing device and cutting device for the synchronization of operations the two institutions only one matched to the respective pad length one-time basic setting is necessary. In doing so, both for the phase difference between the frequency of occurrence of the perforated sections and the Cutting frequency of the cutter as well as for the feed rate Values specified. The latter is based on the production capacity of the filter attachment machine Voted. After this basic setting, it is possible thanks to the invention only by changing the feeding speed of the tipping paper strip Beleimeinrichtung and cutting device even during continuous operation of the Machine matched to the location of the perforations on the tipping paper strip to work. The invention thus ensures with little effort that both the location of the perforated sections and the glue patterns in and on the Tipping paper strips to one another as well as to the section through the cutting device are positioned correctly.

If, according to a preferred embodiment of the invention, the position of the perforated sections in the tipping paper strip before applying the glue images and ensures that the tipping paper strip with appropriately synchronized Positioning the perforated sections of the cutting device is supplied, is so - due to the established by the default setting Synchronization between gluing device and cutting device - without one further monitoring and control also the synchronization of the perforated Sections given to Beleimeinrichtung.

A preferred embodiment of the invention is characterized in that the Synchronous positioning of the perforated sections to the cutting device Feeding speed of the tipping paper strip is changed by briefly pressing the Circumferential speed of a tipping paper strip from a supply roll withdrawing take-off roller is changed accordingly. In this way can be realize the invention particularly simple.

A further advantageous embodiment of the invention changes the feed rate of the tipping paper strip only if the deviation of the Phase angles of the predetermined value a predetermined tolerance amount exceeds. This can be an unnecessary - because on a tolerable Deviation based - changing the feed speed can be avoided.

In an advantageous embodiment of the invention are simultaneously with the detection of the perforated sections or the associated markings the Detects distances of the perforated sections or the associated markings. Again, when departing from a predetermined setpoint the Feeding speed of the tipping paper strip changed. This embodiment offers the advantage that even one compared to the default setting changed Distance between the perforated sections or the associated markings can be compensated for on the tipping paper strip.

So it is no longer necessary, as in the prior art, with each change of the tipping paper strip provided Bobine a new default setting to make the machine. Rather, thanks to the invention Deviations of the distances of the perforations, also sample length (mostly approx 27 mm), on the fresh bobbin opposite the bobbin, with which the Basic setting of the machine was tolerated. This is in State of the art not possible. Because of the travel path in US 5,735,292 disclosed stamp for increasing the distance between the there Beleimeinrichtung and the local cutting device is limited. Such a Stamp is thus unable to without a longer machine downtime required default setting to compensate for the use of bobbins whose pattern length deviates from the basic setting. This is because Such deviations of the pattern length mostly constant on the bobbins are present, so that at usual lengths of the tipping paper strip on the Bobine of about 3,000 meters the deviations in pattern length such Add up that the known stamp encounters its travel limits.

It is preferred as a sensor both for detecting the perforated sections or the assigned markers as well as to capture the pattern length one Double photocell used.

Alternatively, the above-described compensation can be changed Pattern lengths also accomplish that the sensor in the direction of movement the tipping paper strip at a fixed distance from the cutter behind the gluing device, but before the cutting device, more preferred dense (i.e., a few pattern lengths) is placed in front of the cutter and first signals. In this way, there may be a deviation in the pattern length compared to the basic setting due to the near the cutting device do not significantly add up arranged sensor. To in this embodiment synonymous to achieve a synchronization with the gluing, as in the also mentioned before embodiment of the Beleimeinrichtung a sensor for detecting the perforated sections or the associated markings arranged. However, its first signals in this embodiment only with one of the order frequency of Beleimeinrichtung corresponding sequence of compared to third signals. In this embodiment thus finds a Synchronization of the occurrence of the perforated sections with the section through Regulation of the speed of the tipping paper strip with the help of the sensor behind the Beleimeinrichtung instead, while a synchronization of the occurrence of perforated sections with the glue pattern by controlling the order frequency of Beleimeinrichtung using the arranged in front of the Beleimeinrichtung sensor takes place.

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

In the following 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 a device according to the invention in a schematic side view;

Fig. 2

a portion of a tipping 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 Device according to the invention for feeding a section-wise perforated Tipping paper strip 2 in a filter tipping machine with one on the production output the machine tuned speed. The device 1 is in described below with reference to the path of the tipping paper strip 2.

The tipping paper strip 2 is rotated by an arrow 3 about an axis 5 Supply roll 4 withdrawn at a preset speed. The peeling off the tipping paper strip 2 from the pre-board roll 4 is done by means of a Take-off roller pair 6 and 8. One of the two take-off rollers, here the take-off roller 6, is driven by a toothed belt 7 by a drive 11.

Before the tipping paper strip 2 comes to the draw-off rollers 6 and 8, it is about a guide roller 12 is passed to a crusher 14. The breaker 14 breaks that Paper of tipping paper strip 2, so that it later easier around the filter cigarette groups can be wrapped around.

Downstream of the take-off rolls 6 and 8, a sensor 16 is arranged, which is for detecting the perforated portions 18 shown in Fig. 2 on the tipping paper strip 2 serves. The sensor 16 is a light scanner, the transmitted light or reflection method works to the perforated sections 18 or possibly the markings on to recognize the tipping paper strip 2.

Alternatively, the sensor 16 may be formed as a double light barrier to the Speed of the perforated sections to capture, in turn together with the detected frequency of occurrence of the perforated sections 18 in the direction of movement 20 of the tipping paper strip 2 the distance L (see FIG. 2) to be able to determine the perforated portions 18.

At a fixed distance downstream of the sensor 16 is a Beleimeinrichtung 22 for applying glue images on the tipping paper strip 2 intended. The gluing device 22 has a glue nozzle 24, as they For example, in DE 44 37 764 A 1, which corresponds to US 5,769,947 disclosed is. With the help of the glue nozzle 24 glue images on the tipping paper strip. 2 applied, which have glue-free zones that the perforated sections 18 on the tipping paper strip 2, so that on the perforated Sections 18 no glue is applied.

Downstream of the gluing device 22, the tipping paper strip 2 passes over Deflection rollers 26, 27 and 28 to a cutter 30 for periodic Separating uncovered tipping 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 tipping paper strip 2 behind the glue nozzle 24 is arranged. at always the same length of the tipping paper strip 2 between the glue nozzle 24 and the Cutting device 30 is during the cut by a one-time default the control of the glue nozzle 24, the glue image produced to the position of the Cut aligned.

The cutting device 30 has a cutterhead 32 at its periphery arranged, with respect to the radial slightly angled knives 34, and a counter-rotating, the tipping paper strip 2 receiving drum 36. The drum 36 has recesses 38 into which the blades due to the Distance of the drums 32 and 36 to each other during the rotation of the two Drum 32 and 36 can dive to that on the circumference of the drum 36th to separate sitting tipping paper strip 2. Below the on the perimeter of Drum 36 provided support surfaces 40, the drum 36 with a Suction device communicating suction holes 42 for holding the Tipping paper strip 2 and the separated tufts 39 on the drum 36th on.

In a manner known from the prior art is between the Guide rollers 26 and 28 arranged and with the tipping paper strip 2 in Contact standing oscillator 44 and arranged with the drums 32 and 36th synchronized to the tipping paper strip 2 after each cut by one of Knife 34 slightly counter to the direction of movement 20 relative to the drum surface withhold a gap between each cut Sections of the tipping paper strip 2 is formed. The oscillator 44 thus converts the uniform supply of the tipping paper strip 2 to the gluing device 22 in a non-uniform supply to the cutting device 30 um. Details of the cutting device 30 and the oscillator 44 can DE 39 18 137 C2 (the US 5,054,346).

The device 1 operates as follows:

Before applying the glue images using the glue nozzle 24 is with the in a fixed distance to the glue nozzle 24 arranged sensor 16, the sequence of perforated portions 18 detected on the tipping paper strip 2. Alternatively it would be possible, in fixed relation to the perforated portions 18 in the illustrated Embodiment not used, on the tipping paper strip. 2 arranged markings using the sensor 16 to detect. From the one of the Sensor 16 detected sequence of perforated sections 18 on the tipping paper strip 2 is using a computer and control unit 50 is a sequence of formed first signals.

At the same time by means of a sensor 52, the peripheral speed of Drum 36 and thus the cutting stroke of the cutting device 30 detected and a corresponding sequence of second signals to the computer and control unit 50 issued. The sensor 52 is an approximation initiator with a timing disk 51 cooperates. In the computer and control unit 50 is the phase position of the sequence of first signals of the sensor 16 with the phase position the sequence of second signals of the sensor 52 compared. Will this one Deviation of the phase positions of a reference value is determined, so with help which also acts as a control device for the drive 11 computer and Control unit 50 via an electrical connection 53 briefly the number of revolutions of the drive 11 so as to change the movement of the tipping paper strip 2, i. its feeding speed by changing the peripheral speed of Synchronize take-off roller 6 with the cut.

In this way, the invention ensures that the through the knife 34th introduced separation cuts synchronous to the perforation 18 on the Tipping paper strips 2 are performed. By through the oscillator 44 though between the individual sections of the cutterhead 32 varying during respective section of the cutterhead 32, however, each same length of the Tipping paper strip 2 between the glue nozzle 24 and the position of the cut the cutterhead 32 results in the advantage of the invention that thus due to the synchronization of the positions of the perforated portions 18 with the Cutting device 30 and a synchronization of the perforated sections 18 with achieved by the glue nozzle 24 Leimbildern is achieved without a further monitoring and control of the positions of the perforated sections 18 is necessary relative to the glue nozzle 24.

The line 54 symbolizes the electrical control of a not shown Valve of the glue nozzle 24 to synchronize this valve with the with the help of Cutter drum 32 introduced into the tipping paper strip 2 cutting sequences of To control cutting device 30. When it is at the gluing device 22 um a Beleimeinrichtung with a glue roller is, so this is with the machine drive the device 1 kinematically fixed.

Fig. 2 shows a not to scale piece of tipping paper strip 2 with perforated sections 18 and with imperforate sections 18a. Perforated and Unperforated 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 associated with the embodiment of FIG 1 are denoted by the same reference numerals and will be here not described again.

Notwithstanding the embodiment 1 gem. Figure 1 is in the embodiment 100 gem. Figure 3 in addition to the sensor 16 for detecting the perforated Sections or the associated markings on the tipping paper strip 2 a 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 tipping paper strip. 2 In this way, a deviation of the pattern length L from a preset one Value tolerable because the sensor 55 so close to the cutting device 30th finds that such deviations do not exceed tolerance can add up. Alternatively, such a deviation can also be measured length L and their use for changing the feed rate of the Taper paper strip 2 are compensated, for example. By the sensor 16 (as above mentioned) also measures the speed of the tipping paper strip 2.

In the embodiment 100, therefore, two sequences of the sequence of perforated portions 18 corresponding first signals generated. In the Embodiment 100, however, only the first signals of the sensor 55 on the with the sequence of second described with reference to the figure 1 way 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 supplied only with the via a line 19 of the control unit 17 Order frequency of the glue nozzle 24 compared. Is that out of this comparison resulting phase difference between the frequency of the sensor 16 passing perforated portions 18 and the order frequency of the glue nozzle 24 outside a predetermined tolerance value, the gluing device 22 on the Line 21 caused by the controller 17, the order frequency change accordingly.

Claims (17)

1. A method of feeding a portion-wisely perforated covering paper strip (2) in a filter-fitting machine to a glueing device (22, 24) for applying glue patterns with glue-free zones corresponding to the perforated portions (18), and to a cutting device (30) which penodically severs covering paper portions from the covering paper strip (2),
      characterised in that the perforated portions (18) or markings arranged on the covering paper strip (2) in fixed association therewith are detected at at least one location and a respective corresponding sequence of first signals is formed,
      a sequence of second signals corresponding to the cutting frequency of the cutting device (30) is formed,
      the phase positions of the sequences of first and second signals is compared to ascertain a phase difference between the phase positions, and
      upon deviations in the phase difference from a predetermined value the feed speed of the covering paper strip (2) is briefly altered.
2. A method according to claim 1 wherein to form the sequence of first signals the perforated portions (18) or the associated markings are detected prior to application of the glue patterns, at a fixed spacing relative to the glueing device (22, 24).
3. A method according to one of the preceding claims wherein the spacings (L) of the perforated portions (18) or the associated markings are determined and, when the spacings (L) deviate from a predetermined value, the feed speed of the covering paper strip (2) is altered.
4. A method according to claim 3 wherein, to determine the spacings (L) of the perforated portions (18) or the associated markings, the instantaneous speed of the covering paper strip (2) is detected.
5. A method according to claim 1 wherein, to form the sequence of first signals, the perforated portions (18) or the associated markings are detected after application of the glue patterns but prior to severing of the covering paper portions (2), at a fixed spacing relative to the cutting device (30).
6. A method according to claims 2 and 5 wherein a sequence of third signals corresponding to the application frequency of the glueing device (22, 24) is formed, the phase position of the sequence of first signals which is detected prior to application of the glue patterns is compared only to the phase position of the sequence of third signals for ascertaining a phase difference between the phase positions, when the phase difference deviates from a predetermined value the application frequency of the glueing device (22, 24) is briefly altered, the phase position of the sequence of first signals which is detected after application of the glue patterns is compared only to the phase position of the sequence of second signals for ascertaining a phase difference between the phase positions, and when the phase difference deviates from a predetermined value the feed speed of the covering paper strip (2) is briefly altered.
7. A method according to one of the preceding claims wherein the feed speed is altered by controlling the peripheral speed of a draw-off roller (6, 8) which draws the covering paper strip (2) off a supply roll (4).
8. A method according to one of the preceding claims wherein the feed speed is altered only when the deviation of the phase difference from the predetermined value exceeds a predetermined tolerance amount.
9. A method according to one of the preceding claims wherein the feed speed serves as a setting value for a regulating circuit for regulating the position of the perforated portions (18) or the associated markings relative to a cutting position of the cutting device (30).
10. Apparatus for feeding a portion-wisely perforated covering paper strip (2) in a filter-fitting machine, comprising
       a glueing device (22, 24) for applying glue patterns with glue-free zones corresponding to the perforated portions (18),
       a feed device (6, 8) for feeding the covering paper strip (2) to the glueing device (22, 24), and
       a cutting device (30) for periodically severing covering paper portions from the covering paper strip (2),
       characterised by
       at least one sensor (16, 55) for detecting the perforated portions (18) or markings arranged on the covering paper strip (2) in fixed association with said portions,
       first signal-producing means (50) for producing a respective sequence of first signals corresponding to the succession, detected by the at least one sensor (16, 55), of the perforated portions (18) or the associated markings,
       second signal-producing means for producing a sequence of second signals, which corresponds to the cutting frequency of the cutting device (30),
       first comparison means (50) for comparing the phase positions of the sequences of first and second signals and for producing first comparison signals, and
       first control means (50) connected to the first comparison means (50) for briefly altering the feed speed of the covering paper strip (2) in dependence on deviations of the first comparison signals from a predetermined value.
11. Apparatus according to claim 10 wherein the sensor (16) is arranged upstream of the glueing device (22, 24) at a fixed spacing relative to the glueing device (22, 24) in the direction of movement (20) of the covering paper strip (2).
12. Apparatus according to one of claims 10 and 11 wherein the sensor (16) is such that the spacings (L) of the perforated portions (18) or the associated markings can also be determined by means of the sensor in the direction of movement (20) of the covering paper strip (2),
       comprising second comparison means for comparing the spacings (L) to a predetermined value and for producing second comparison signals, and
       further comprising second control means connected to the second comparison means for briefly altering the feed speed of the covering paper strip (2) in dependence on deviations of the second comparison signals from a predetermined value.
13. Apparatus according to claim 12 wherein the sensor (16) for determining the spacings (L) is adapted to detect the instantaneous speed of the perforated portions (18) or the associated markings.
14. Apparatus according to one of claims 12 and 13 wherein the second comparison means and/or the second control means are at least in part identical to the first comparison means (50) and/or the first control means (50).
15. Apparatus according to claim 10 wherein the sensor (55) is arranged at a fixed spacing relative to the cutting device (30) downstream of the glueing device (22, 24) but upstream of the cutting device (30) in the direction of movement (20) of the covering paper strip (2).
16. Apparatus according to claims 11 and 15 comprising
       third signal-producing means (22) for producing a sequence of third signals, which corresponds to the application frequency of the glueing device (22, 24),
       third comparison means (17) for comparing the phase positions of the sequence of first signals, which is detected by means of the sensor (16) arranged upstream of the glueing device (22, 24), only to the phase position of the sequence of third signals, and for producing third comparison signals,
       third control means (17) connected to the third comparison means (17) for briefly altering the application frequency of the glueing device (22, 24) in dependence on deviations of the third comparison signals from a predetermined value,
       wherein the first comparison means (50) compare the phase positions of the sequence of first signals, which is detected by means of the sensor (50) arranged downstream of the glueing device (22, 24), only to the phase position of the sequence of second signals.
17. Apparatus according to one of claims 10 to 16 wherein the control means (50) include a draw-off roller (6, 8) for drawing the covering paper strip (2) off a supply roll (4).

Images