WO2018189645A1 - Device, method and apparatus for inspecting embossed filter segments - Google Patents

Device, method and apparatus for inspecting embossed filter segments Download PDF

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Publication number
WO2018189645A1
WO2018189645A1 PCT/IB2018/052449 IB2018052449W WO2018189645A1 WO 2018189645 A1 WO2018189645 A1 WO 2018189645A1 IB 2018052449 W IB2018052449 W IB 2018052449W WO 2018189645 A1 WO2018189645 A1 WO 2018189645A1
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WO
WIPO (PCT)
Prior art keywords
embossed
embossed filter
filter segment
drum
image
Prior art date
Application number
PCT/IB2018/052449
Other languages
French (fr)
Inventor
Fulvio Pastore
Lorenzo SELMI
Maria Eleonora CESARINI
Massimo Sartoni
Luca Federici
Original Assignee
G.D S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by G.D S.P.A. filed Critical G.D S.P.A.
Priority to KR1020197029973A priority Critical patent/KR102640310B1/en
Priority to JP2019555838A priority patent/JP7157076B2/en
Priority to EP18718523.6A priority patent/EP3609353A1/en
Priority to CN201880022175.9A priority patent/CN110519999B/en
Publication of WO2018189645A1 publication Critical patent/WO2018189645A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
    • A24C5/3412—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes by means of light, radiation or electrostatic fields
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/322—Transporting cigarettes during manufacturing
    • A24C5/326—Transporting cigarettes during manufacturing with lateral transferring means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/025—Final operations, i.e. after the filter rod forming process
    • A24D3/0258—Means for making grooves

Definitions

  • This invention relates to a device for inspecting embossed filter segments.
  • the invention also relates to a method and an apparatus for inspecting embossed filter segments.
  • a filter segment for a smoking article consists of a cylinder of filter material (for example, cellulose acetate) and tipping paper which covers the cylinder of filter material.
  • filter material for example, cellulose acetate
  • embossed filters or, more precisely, partly embossed filters used as alternatives to this type of filter segment to provide different sensations during a smoke.
  • an embossed filter segment includes embossed tipping paper placed between the cylinder of filter material and the tipping paper. More specifically, the embossed tipping paper comprises portions of embossed tipping paper alternated with portions of smooth tipping paper.
  • an embossed filter segment comprises at least a first portion which is embossed (that is, which comprises a portion of embossed tipping paper) and at least a second portion, adjacent and contiguous to the first portion, which is not embossed (that is, which does not comprise any portion of embossed tipping paper).
  • an embossing station which comprises embossing means for embossing a tape of tipping paper to obtain a tape of embossed tipping paper which has portions of embossed tape, alternated along the tape, with portions of non-embossed (or smooth) tape;
  • a first wrapping station which wraps a rod of filter material with the tape of embossed tipping paper to obtain a semi-finished rod
  • the embossed portion of the embossed filter segment In order to obtain a good quality product, it is important for the embossed portion of the embossed filter segment to be of the right length. In other words, the length of the embossed portion of the embossed filter segment must not differ from a reference value by more than a certain tolerance. This is not always the case, however, especially on account of the elasticity of the tape of embossed tipping paper (especially the embossed parts of the tape).
  • patent EP 2 841 481 (B1 ) discloses a device for inspecting the embossed filter rod.
  • This prior art device comprises a camera which is located upstream of the cutting means of the machine for making the embossed filter segments and which captures, at a certain frequency, circumferential images of the embossed filter rod as it moves towards the cutting means.
  • the device also comprises a processing unit which receives the images captured by the camera and which, based on these images, calculates the length of the embossed filter segment after the action of the cutting means, !n order to calculate the length, the processing unit must necessarily receive not only the images captured by the camera but also a phase signal relating to the real cutting position. Lastly, based on the calculated length, the processing unit drives the cutting means of the embossed filter segment production machine and, if necessary, adjusts the position where the embossed filter rod is cut.
  • the embossed filter rod moves towards the cutting means, however, the embossed filter rod tends to move uncontrollably. Consequently, the circumferential images captured at this stage do not always allow the length of the embossed stretches to be calculated to an adequate degree of precision.
  • This invention has for an aim to provide a device, a method and an apparatus for inspecting embossed filter segments to overcome the above mentioned drawbacks.
  • FIG. 1 is a schematic view of a machine for making embossed filter segments
  • FIGS. 3, 6A, 8 and 10 are views of embossed filter segments corresponding to - Figures 2, 5, 7 and 9, respectively, and highlighting the first part of the embossed filter segment whose image is captured;
  • Figures 4 and 8B are views similar to those of Figures 3 and 6A, respectively, and highlighting the second part of the embossed filter segment whose image is captured;
  • FIG. 1 1 is a top view of part of the apparatus of this invention for inspecting embossed filter segments
  • FIG. 12 is a front view of an embodiment of the device of this invention for inspecting embossed filter segments
  • FIG. 13 shows an enlarged view of a part of the device of Figure 12;
  • FIG. 14 shows an enlarged view of a part of the device of Figure 12, with some parts cut away to better illustrate others;
  • FIG. 15 is a cross section through line XV-XV of Figure 12.
  • the numeral 1 genericaily denotes a device for inspecting embossed filter segments.
  • An embossed filter segment 2 is a cylindrical element extending longitudinally along an axis of extension X.
  • An embossed filter segment 2 may be coupled, for example, to a tobacco segment to make a smoking article.
  • An embossed filter segment 2 is usually obtained from an embossed filter rod 108, the embossed filter rod 108 being in turn obtained by wrapping a rod of filter material 104 first in a tape of embossed tipping paper 102 and then in a tape of smooth tipping paper 107.
  • the tape of embossed tipping paper 102 is a tape which extends longitudinally and which has portions of embossed tape, transverse to the extension of the tape and alternated with portions of non-embossed (or smooth) tape.
  • a production machine 100 for making embossed filter segments 2 comprises:
  • embossing station which comprises embossing means 101 (for example, a pair of embossing rollers) for embossing the tape of tipping paper to obtain a tape of embossed tipping paper 1 02 which has portions of embossed tape, alternated with portions of non-embossed (or smooth) tape;
  • embossing means 101 for example, a pair of embossing rollers
  • a first wrapping station 103 which wraps a rod of filter material 104 with the tape of embossed tipping paper 102 to obtain a semi-finished rod 105;
  • the second wrapping station 106 may be located downstream of the first wrapping station 103. Alternatively, the first wrapping station 103 and the second wrapping station 106 may substantially coincide so that the tape of embossed tipping paper 102 and the tape of tipping paper 107 are applied to the rod of filter material 104 substantially simultaneously.
  • embossed filter segment may be used to mean a piece of embossed filter 2 equal in length to the filter tip of a smoking article.
  • embossed filter segment may be used to mean a piece of embossed filter which is twice the length of the filter tip of a smoking article.
  • FIGS 2-10 schematically illustrate different embodiments of an embossed filter segment 2.
  • an embossed filter segment 2 comprises at least a first portion 20 and a second portion 21 , each having a first end 20a, 21 a and a second end 20b, 21 b.
  • the second end 20b of the first portion 20 is adjacent and contiguous to the first end 21 a of the second portion 21.
  • first portion 20 or the second portion 21 is embossed.
  • the embossed filter segment 2 illustrated has a first portion 20 which is embossed and a second portion 21 which is not embossed.
  • the embossed filter segment 2 illustrated has a first portion 20 which is embossed, a second portion 21 which is not embossed and third portion 22 which is embossed and is contiguous and adjacent to the second portion 21 .
  • the embossed filter segment 2 illustrated has a first portion 20 which is not embossed, a second portion 21 which is embossed and third portion 22 which is not embossed and is contiguous and adjacent to the second portion 21 .
  • the embossed filter segment 2 illustrated has a first portion 20 which is not embossed, a second portion 21 which is embossed and third portion 22 which is embossed; the first portion 20 is disposed between the second portion 21 and the third portion 22.
  • the embossed filter segment 2 illustrated has a first portion 20 which is embossed, a second portion 21 which is not embossed and third portion 22 which is not embossed; the first portion 20 is disposed between the second portion 21 and the third portion 22.
  • the device 1 comprises: a drum 3 rotatabie about a rotation axis Y and comprising a plurality of seats 30 for receiving in each one an embossed filter segment 2; image capturing means 4 for capturing an image of a first part 5 of the embossed filter segment 2 disposed in the seat of the drum 3, the first part 5 extending parallel to the axis of extension X of the embossed filter segment 2 and at least from the first end 20a of the first portion 20 to the first end 21 a of the second portion 21 ; a processing unit 8 for processing the aforesaid image and which, based on the image, calculates the length Li of the first portion 20 of the embossed filter segment 2.
  • length Li of the first portion 20 of the embossed filter segment 2 is meant the length of the first portion 20 in the direction of the axis of extension X.
  • the proposed device 1 captures the image of the first part 5 of the embossed filter segment 2 while the latter is being held in the seat 30 of the drum 3.
  • the drum 3 may comprise suction means which hold the embossed filter segments 2 in the respective seats 30.
  • the embossed filter segment 2 is stable and the image captured is such as to allow the length Li to be calculated accurately.
  • the first part 5 of the embossed filter segment 2 whose image is captured extends preferably longitudinally, !n other words, the first part 5 of the embossed filter segment 2 is greater in length in the direction parallel to the axis of extension X than it is in height in the direction at right angles to the axis of extension X.
  • the image captured of the first part 5 of the embossed filter segment 2 is an image from the front (this image being at most equal to 180 degrees of the circle of the embossed filter segment 2; preferably, the image is equal to 150 degrees of the circle of the embossed filter segment 2).
  • the drum 3 can receive the embossed filter segments 2 from the above described production machine 100 for making embossed filter segments
  • the processing unit 8 can be connected to the cutting means 109 and/or to the embossing means 102 of the production machine 100 which makes embossed filter segments 2, so as to drive the cutting means 109 and/or the embossing means 102 on the basis of the calculated length Li.
  • the proposed device 1 with feedback control can be implemented with traditional electronic circuitry, advantageously allowing costs to be limited.
  • the proposed device 1 may comprise rejection means 7 which are connected to the processing unit 6 and which are driven by the processing unit 6 to reject the embossed filter segments 2 on the basis of the calculated length Li ( Figure 12).
  • the image capturing means 4 comprise a first camera 40 which captures the image of the first part 5 of the embossed filter segment 2 disposed in the seat 30 of the drum 3,
  • the image capturing means 4 may also comprise a first illuminator 41 which illuminates at least the aforesaid first part 5 of the embossed filter segment 2 disposed in the seat 30 of the drum 3.
  • illuminating the first part 5 allows capturing a clearer image so that the length Li can be calculated more accurately.
  • the first camera 40 and the first illuminator 41 are driven in phase, or simultaneously.
  • the first camera 40, the first illuminator 41 and the drum 3 are mutually disposed so that, during image capture, the embossed filter segment 2 is positioned between the first camera 40 and the first illuminator 41 .
  • the light from the illuminator 41 passes through at least the first part 5 of the embossed filter segment 2 so as to allow capturing a clear image. More specifically, by processing the image it is possible to accurately calculate the length Li of the first portion 20 of the embossed filter segment 2. Also, the fact that the light passes through the first part 5 of the embossed filter segment 2 makes it possible to inspect internal features, that is, those below the surface of the embossed filter segment 2.
  • the image capturing means 4 may also comprise a first diaphragm 44 between the first camera 40 and the first illuminator 41 .
  • the light from the first illuminator 41 is concentrated on the first part 5 of the embossed filter segment 2.
  • each seat 30 of the drum 3 is configured to receive only partially the embossed filter segment 2 so that at least the first part 5 of the embossed filter segment 2 protrudes from the drum 3.
  • the first camera 40 and the first illuminator 41 are counterposed to each other and side by side with the drum 3. This arrangement of first camera 40 and first illuminator 41 allows using a drum 3 of a kind well known in the tobacco industry. Consequently, this solution is simple in construction and inexpensive.
  • the first illuminator or the first camera is disposed at least partly inside the first drum (preferably, the first illuminator is disposed at least partly inside the drum).
  • each seat of the drum is shaped to allow the passage of the light at least at the aforesaid first part 5 of the embossed filter segment 2 (for example, the seat of the drum may be made of a transparent material or it may be formed in a slit, slot or opening in the drum.
  • this embodiment of the device 1 is particularly compact.
  • the embossed filter segment 2 comprises a third portion 22 having a first end 22a, which is adjacent and contiguous to the second end 21 b of the second portion 21 , and a second end 22b. More specifically, if the first portion 20 is embossed, then the third portion 22 is also embossed; if the first portion 20 is smooth (that is, not embossed), then the third portion 22 is also smooth.
  • the image capturing means 4 may be configured to capture an image of a second part 8 of the embossed filter segment 2 disposed in the seat 30 of the drum 3, the second part 8 being counterposed to the first part 5 and extending parallel to the axis of extension X of the embossed filter segment 2 at least from the second end 22b of the third portion 22 to the second end 21 b of the second portion 21 .
  • the second part 8 is diametrically opposite to the first part 5 and offset, in the direction of extension of the embossed filter segment 2, relative to the first part 5 ( Figure 6B), Alternatively, the second part 8 might be facing and diametrically opposite to the first part 5.
  • An embossed filter segment 2 comprises a splice line on the tape of tipping paper 102 wrapped around the rod of filter material 104; the splice line is paraliei to the direction of extension of the embossed filter segment 2. Consequently, if the image captured is at the splice line, it might be complicated to calculate the length Li to an adequate degree of precision.
  • capturing an image both of the first part 5 and the second part 8 ensures that the length Li can be calculated accurately.
  • the second part 8 is counterposed (that is, diametrically opposite) to the first part 5 and extends parallel to the axis of extension X of the embossed filter segment 2 at least from the first end 20a of the first portion 20 to the first end 21 a of the second portion 21 ( Figure 4).
  • the second part 8 might be counterposed to the first part 5, that is, facing and diametricaiiy opposite to the first part 5.
  • the second part 8 may extend at least from the second end 20b of the first portion 20 to the second end 21 b of the second portion 21 .
  • the second part 8 is diametricaiiy opposite to the first part 5 and offset, in the direction of extension X, relative to the first part 5.
  • the second part 8 of the embossed filter segment 2 whose image is captured extends preferably longitudinally.
  • the second part 8 of the embossed filter segment 2 is greater in length in the direction parallel to the axis of extension X than it is in height in the direction at right angles to the axis of extension X.
  • the image captured of the second part 8 of the embossed filter segment 2 is an image of the second part 8 from the front (this image being at most equal to 180 degrees of the circle of the embossed filter segment 2; preferably, the image is equal to 150 degrees of the circle of the embossed filter segment 2).
  • the image capturing means 4 comprise: a second camera which captures the image of the second part 8 of the embossed filter segment 2 disposed in the seat 30 of the drum 3; a second illuminator which illuminates at least the second part 8 of the embossed filter segment 2 disposed in the seat 30 of the drum 3.
  • the second camera and the second illuminator are driven in phase, or simultaneously.
  • the image capturing means 4 may also comprise a second diaphragm between the second camera and the second illuminator.
  • the light from the second illuminator is concentrated on the second part 8 of the embossed filter segment 2.
  • the production machine 100 for making embossed filter segments can make two embossed filter rods and feeds out pairs of embossed filter segments 2.
  • the device 1 may comprise a pair of (counter-rotating) conveyor drums - a first drum 70 and a second drum 71 - each of which receives one embossed filter segment 2 of the pair of embossed filter segments 2 feeding out of the machine 100.
  • the first conveyor drum 70 transfers the embossed filter segments to the drum 3 on which at least the image of the first longitudinal portion 5 of the embossed filter segment 2 is captured.
  • the second conveyor drum 71 transfers the embossed filter segments 2 to a further drum 72, which is similar to the drum 3 and near which there is at least one camera 42 and one illuminator 43 to capture an image of at least a first longitudinal portion of the embossed filter segment 2 disposed in the seat of the drum 72.
  • the spacing between the seats 30 on the drum 3 is double the spacing between the seats on the drum 72; the device 1 may comprises further conveyor drums 73, 74 (for example, two) disposed between the drum 3 and the further drum 72 to transfer the embossed filter segments 2 from the drum 3 to the further drum 72,
  • Described below is a method according to this invention for inspecting embossed filter segments 2.
  • the method can be implemented by any of the embodiments of the device 1 described above.
  • the method comprises the following steps:
  • embossed filter segment 2 extends longitudinally along an axis of extension X and comprises at least a first portion 20 and a second portion 21 each having a first end 20a, 21 a and a second end 20b, 21 b; the second end 20b of the first portion 20 being adjacent and contiguous to the first end 21 a of the second portion 21 ; the first portion 20 or the second portion 21 being embossed;
  • the proposed method allows calculating the length Li because the image is captured after the embossed filter segment 2 has been suitably placed in the seat 30 of the drum 3.
  • the embossed filter segment 2 may be disposed in the seat 30 of the drum 3 by a production machine 100 which makes embossed filter segments 2, the machine 100 comprising embossing means 101 for embossing a tape of tipping paper and cutting means 109 for cutting an embossed filter rod 108 to obtain embossed filter segments 2.
  • the method comprises the step of driving the cutting means 109 and/or the embossing means 101 of the production machine 100 which makes embossed filter segments 2, on the basis of the calculated length Li .
  • an adequate length Li of the first portion 20 of the embossed filter segment 2 is ensured at all times. Furthermore, compared to the prior art, this method can be implemented easily and with inexpensive electronic circuitry, since the inspection is performed on the embossed filter segment 2 (and not on the filter rod) and a phase signal indicating the real position of the cut is not therefore necessary.
  • the method may also comprise the step of comparing the calculated length Li with a reference value. This step may be performed before the step of driving the cutting means 109 and/or the embossing means 101 of the production machine 100 which makes embossed filter segments 2, on the basis of the calculated length Li .
  • the method may also comprise the step of rejecting the embossed filterc segments whose length Li differs from the reference value; preferably, this step is performed after the step of comparing the calculated length Li with a reference value.
  • the step of capturing the image of the first part 5 of the embossed filter segment 2 comprises the step of illuminating the first part 5 of the embossed filter segment 2. More specifically, the step of illuminating the first part 5 of the embossed filter segment 2 is performed in such a way that the light passes through the first part 5.
  • the image captured is particularly clear.
  • the method may comprise the step of capturing an image of a second part 8 of the embossed filter segment 2.
  • the second part 8 is counterposed to the first part 5 and extends parallel to the axis of extension X of the embossed filter segment 2 at least from the second end 22b of the third portion 22 to the second end 21 b of the second portion 21 .
  • the tape of tipping paper 102 wrapped around the rod of filter material 104 to form the embossed filter segment 2 has a splice line on it which is parallel to the direction of extension of the embossed filter segment 2, capturing the image both of the first part 5 and of the second part 8 ensures that the length Li can be calculated accurately.
  • the second part 8 might be facing and diametrically opposite to the first part 5.
  • the second part 8 is counterposed (that is, diametrically opposite) to the first part 5 and extends parallel to the axis of extension X of the embossed filter segment 2 at least from the first end 20a of the first portion 20 to the first end 21 a of the second portion 21 ( Figure 4),
  • the second part 8 might be counterposed to the first part 5, that is, facing and diametrically opposite to the first part 5.
  • the second part 8 may extend at least from the second end 20b of the first portion 20 to the second end 21 b of the second portion 21 .
  • the second part 8 is diametrically opposite to the first part 5 and offset, in the direction of extension X, relative to the first part 5,
  • the step of capturing the image of the second part 8 of the embossed filter segment 2 comprises the step of illuminating the second part 8 of the embossed filter segment 2.
  • the step of illuminating the second part 8 of the embossed filter segment 2 is preferably performed in such a way that the light passes through the second part 8.
  • This invention also addresses an apparatus 10 for inspecting embossed filter segments 2.
  • the apparatus 10 comprises: a production machine 100 which makes embossed filter segments 2, the machine 100 comprising embossing means 101 for embossing a tape of tipping paper and cutting means 109 for cutting an embossed filter rod 108 to obtain embossed filter segments 2; a device 1 for inspecting embossed filter segments 2 according to any one of the embodiments described above. More specifically, the processing unit 6 of the device 1 is connected to the cutting means 109 and/or to the embossing means 102 of the production machine 100 which makes embossed filter segments 2, so as to drive the cutting means 109 and/or the embossing means 102.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Image Analysis (AREA)

Abstract

This invention relates to a device, a method and an apparatus for inspecting embossed filter segments. Each embossed filter segment (2) extends longitudinally and comprises at least a first portion (20) and a second portion (21) each having a first end (20a, 21a) and a second end (20b, 21b). The second end (20b) of the first portion (20) is adjacent and contiguous to the first end (21a) of the second portion (21). The first portion (20) or the second portion (21) is embossed. The device (1) comprises: a rotary drum (3) comprising a plurality of seats (30) for receiving in each one an embossed filter segment (2); image capturing means (4) for capturing an image of a first part (5) of the embossed filter segment (2) disposed in the seat of the drum (3), the first part (5) extending parallel to the axis of extension (X) of the embossed filter segment (2) and at least from the first end (20a) of the first portion (20) to the first end (21a) of the second portion (21); a processing unit (6) for processing the aforesaid image and which, based on the image, calculates the length (L1) of the first portion (20) of the embossed filter segment (2).

Description

DESCRIPTION
Figure imgf000003_0001
Technical field
This invention relates to a device for inspecting embossed filter segments. The invention also relates to a method and an apparatus for inspecting embossed filter segments.
Background art
In its most traditional form, a filter segment for a smoking article consists of a cylinder of filter material (for example, cellulose acetate) and tipping paper which covers the cylinder of filter material.
Known in the tobacco industry are embossed filters (or, more precisely, partly embossed filters) used as alternatives to this type of filter segment to provide different sensations during a smoke.
In addition to the traditional filter segment, an embossed filter segment includes embossed tipping paper placed between the cylinder of filter material and the tipping paper. More specifically, the embossed tipping paper comprises portions of embossed tipping paper alternated with portions of smooth tipping paper.
In other words, an embossed filter segment comprises at least a first portion which is embossed (that is, which comprises a portion of embossed tipping paper) and at least a second portion, adjacent and contiguous to the first portion, which is not embossed (that is, which does not comprise any portion of embossed tipping paper).
A prior art production machine for making embossed filter segments comprises:
- an embossing station which comprises embossing means for embossing a tape of tipping paper to obtain a tape of embossed tipping paper which has portions of embossed tape, alternated along the tape, with portions of non-embossed (or smooth) tape;
- a first wrapping station which wraps a rod of filter material with the tape of embossed tipping paper to obtain a semi-finished rod;
- a second wrapping station, downstream of the first wrapping station, which wraps the semi-finished rod with a tape of tipping paper to obtain an embossed filter rod;
- cutting means which are located downstream of the second wrapping station and which cut the embossed filter rod into embossed filter segments.
In order to obtain a good quality product, it is important for the embossed portion of the embossed filter segment to be of the right length. In other words, the length of the embossed portion of the embossed filter segment must not differ from a reference value by more than a certain tolerance. This is not always the case, however, especially on account of the elasticity of the tape of embossed tipping paper (especially the embossed parts of the tape).
In this regard, patent EP 2 841 481 (B1 ) discloses a device for inspecting the embossed filter rod.
This prior art device comprises a camera which is located upstream of the cutting means of the machine for making the embossed filter segments and which captures, at a certain frequency, circumferential images of the embossed filter rod as it moves towards the cutting means.
The device also comprises a processing unit which receives the images captured by the camera and which, based on these images, calculates the length of the embossed filter segment after the action of the cutting means, !n order to calculate the length, the processing unit must necessarily receive not only the images captured by the camera but also a phase signal relating to the real cutting position. Lastly, based on the calculated length, the processing unit drives the cutting means of the embossed filter segment production machine and, if necessary, adjusts the position where the embossed filter rod is cut.
As the embossed filter rod moves towards the cutting means, however, the embossed filter rod tends to move uncontrollably. Consequently, the circumferential images captured at this stage do not always allow the length of the embossed stretches to be calculated to an adequate degree of precision.
Moreover, having to provide the processing unit with the phase signal relating to the real cutting position makes it necessary to use an electronic system capable of responding sufficiently quickly to ensure an accurate result. Consequently, the prior art device is relatively expensive.
Disclosure of the invention
This invention has for an aim to provide a device, a method and an apparatus for inspecting embossed filter segments to overcome the above mentioned drawbacks.
The above aim is achieved by a device, a method and an apparatus for inspecting embossed filter segments according to the accompanying claims.
Brief description of the drawings
The invention is described below with reference to the accompanying drawings, which illustrate non-limiting embodiments of it, and in which: - Figure 1 is a schematic view of a machine for making embossed filter segments;
- Figures 2, 5, 7 and 9 are side views of respective embodiments of an embossed filter segment;
- Figures 3, 6A, 8 and 10 are views of embossed filter segments corresponding to -Figures 2, 5, 7 and 9, respectively, and highlighting the first part of the embossed filter segment whose image is captured;
- Figures 4 and 8B are views similar to those of Figures 3 and 6A, respectively, and highlighting the second part of the embossed filter segment whose image is captured;
- Figure 1 1 is a top view of part of the apparatus of this invention for inspecting embossed filter segments;
- Figure 12 is a front view of an embodiment of the device of this invention for inspecting embossed filter segments;
- Figure 13 shows an enlarged view of a part of the device of Figure 12;
- Figure 14 shows an enlarged view of a part of the device of Figure 12, with some parts cut away to better illustrate others;
- Figure 15 is a cross section through line XV-XV of Figure 12.
With reference to the accompanying drawings, the numeral 1 genericaily denotes a device for inspecting embossed filter segments.
An embossed filter segment 2 is a cylindrical element extending longitudinally along an axis of extension X. An embossed filter segment 2 may be coupled, for example, to a tobacco segment to make a smoking article.
An embossed filter segment 2 is usually obtained from an embossed filter rod 108, the embossed filter rod 108 being in turn obtained by wrapping a rod of filter material 104 first in a tape of embossed tipping paper 102 and then in a tape of smooth tipping paper 107. More in detail, the tape of embossed tipping paper 102 is a tape which extends longitudinally and which has portions of embossed tape, transverse to the extension of the tape and alternated with portions of non-embossed (or smooth) tape.
With reference to Figure 1 , a production machine 100 for making embossed filter segments 2 comprises:
- an embossing station which comprises embossing means 101 (for example, a pair of embossing rollers) for embossing the tape of tipping paper to obtain a tape of embossed tipping paper 1 02 which has portions of embossed tape, alternated with portions of non-embossed (or smooth) tape;
- a first wrapping station 103 which wraps a rod of filter material 104 with the tape of embossed tipping paper 102 to obtain a semi-finished rod 105;
- a second wrapping station 106 which wraps the semi-finished rod 105 with a tape of tipping paper 107 to obtain an embossed filter rod 108:
- cutting means 109 which are located downstream of the second wrapping station 106 and which cut the embossed filter rod 108 into embossed filter segments 2,
The second wrapping station 106 may be located downstream of the first wrapping station 103. Alternatively, the first wrapping station 103 and the second wrapping station 106 may substantially coincide so that the tape of embossed tipping paper 102 and the tape of tipping paper 107 are applied to the rod of filter material 104 substantially simultaneously.
The term "embossed filter segment" may be used to mean a piece of embossed filter 2 equal in length to the filter tip of a smoking article. Alternatively, the term "embossed filter segment" may be used to mean a piece of embossed filter which is twice the length of the filter tip of a smoking article.
Figures 2-10 schematically illustrate different embodiments of an embossed filter segment 2.
Generally speaking, an embossed filter segment 2 comprises at least a first portion 20 and a second portion 21 , each having a first end 20a, 21 a and a second end 20b, 21 b. The second end 20b of the first portion 20 is adjacent and contiguous to the first end 21 a of the second portion 21.
Further, the first portion 20 or the second portion 21 is embossed.
With reference to Figures 2, 3 and 4, the embossed filter segment 2 illustrated has a first portion 20 which is embossed and a second portion 21 which is not embossed.
With reference to Figures 5 and 6, the embossed filter segment 2 illustrated has a first portion 20 which is embossed, a second portion 21 which is not embossed and third portion 22 which is embossed and is contiguous and adjacent to the second portion 21 .
With reference to Figures 7 and 8, the embossed filter segment 2 illustrated has a first portion 20 which is not embossed, a second portion 21 which is embossed and third portion 22 which is not embossed and is contiguous and adjacent to the second portion 21 .
With reference to Figure 9, the embossed filter segment 2 illustrated has a first portion 20 which is not embossed, a second portion 21 which is embossed and third portion 22 which is embossed; the first portion 20 is disposed between the second portion 21 and the third portion 22.
With reference to Figure 10, the embossed filter segment 2 illustrated has a first portion 20 which is embossed, a second portion 21 which is not embossed and third portion 22 which is not embossed; the first portion 20 is disposed between the second portion 21 and the third portion 22.
Described below with reference to Figures 1 1 -15 is an embodiment of the device 1 of this invention for inspecting embossed filter segments 2.
The device 1 comprises: a drum 3 rotatabie about a rotation axis Y and comprising a plurality of seats 30 for receiving in each one an embossed filter segment 2; image capturing means 4 for capturing an image of a first part 5 of the embossed filter segment 2 disposed in the seat of the drum 3, the first part 5 extending parallel to the axis of extension X of the embossed filter segment 2 and at least from the first end 20a of the first portion 20 to the first end 21 a of the second portion 21 ; a processing unit 8 for processing the aforesaid image and which, based on the image, calculates the length Li of the first portion 20 of the embossed filter segment 2.
By "length Li of the first portion 20 of the embossed filter segment 2" is meant the length of the first portion 20 in the direction of the axis of extension X.
The proposed device 1 captures the image of the first part 5 of the embossed filter segment 2 while the latter is being held in the seat 30 of the drum 3. For this purpose, the drum 3 may comprise suction means which hold the embossed filter segments 2 in the respective seats 30. In any case, the embossed filter segment 2 is stable and the image captured is such as to allow the length Li to be calculated accurately.
The first part 5 of the embossed filter segment 2 whose image is captured extends preferably longitudinally, !n other words, the first part 5 of the embossed filter segment 2 is greater in length in the direction parallel to the axis of extension X than it is in height in the direction at right angles to the axis of extension X.
More specifically, the image captured of the first part 5 of the embossed filter segment 2 is an image from the front (this image being at most equal to 180 degrees of the circle of the embossed filter segment 2; preferably, the image is equal to 150 degrees of the circle of the embossed filter segment 2).
The drum 3 can receive the embossed filter segments 2 from the above described production machine 100 for making embossed filter segments
2.
In such a case, the processing unit 8 can be connected to the cutting means 109 and/or to the embossing means 102 of the production machine 100 which makes embossed filter segments 2, so as to drive the cutting means 109 and/or the embossing means 102 on the basis of the calculated length Li.
Advantageously, since the inspection is performed on the embossed filter segment 2 (and not on the filter rod), a phase signal indicating the real position of the cut is not necessary. Consequently, the proposed device 1 with feedback control can be implemented with traditional electronic circuitry, advantageously allowing costs to be limited.
Further, the proposed device 1 may comprise rejection means 7 which are connected to the processing unit 6 and which are driven by the processing unit 6 to reject the embossed filter segments 2 on the basis of the calculated length Li (Figure 12).
With reference in particular to Figure 12, the image capturing means 4 comprise a first camera 40 which captures the image of the first part 5 of the embossed filter segment 2 disposed in the seat 30 of the drum 3, The image capturing means 4 may also comprise a first illuminator 41 which illuminates at least the aforesaid first part 5 of the embossed filter segment 2 disposed in the seat 30 of the drum 3.
Advantageously, illuminating the first part 5 allows capturing a clearer image so that the length Li can be calculated more accurately.
The first camera 40 and the first illuminator 41 are driven in phase, or simultaneously.
Preferably, the first camera 40, the first illuminator 41 and the drum 3 are mutually disposed so that, during image capture, the embossed filter segment 2 is positioned between the first camera 40 and the first illuminator 41 .
Thus, during image capture, the light from the illuminator 41 passes through at least the first part 5 of the embossed filter segment 2 so as to allow capturing a clear image. More specifically, by processing the image it is possible to accurately calculate the length Li of the first portion 20 of the embossed filter segment 2. Also, the fact that the light passes through the first part 5 of the embossed filter segment 2 makes it possible to inspect internal features, that is, those below the surface of the embossed filter segment 2.
The image capturing means 4 may also comprise a first diaphragm 44 between the first camera 40 and the first illuminator 41 . Advantageously, the light from the first illuminator 41 is concentrated on the first part 5 of the embossed filter segment 2.
With reference in particular to Figure 15, each seat 30 of the drum 3 is configured to receive only partially the embossed filter segment 2 so that at least the first part 5 of the embossed filter segment 2 protrudes from the drum 3. In such a case, the first camera 40 and the first illuminator 41 are counterposed to each other and side by side with the drum 3. This arrangement of first camera 40 and first illuminator 41 allows using a drum 3 of a kind well known in the tobacco industry. Consequently, this solution is simple in construction and inexpensive.
Alternatively, in an embodiment not illustrated, the first illuminator or the first camera is disposed at least partly inside the first drum (preferably, the first illuminator is disposed at least partly inside the drum). In such a case, each seat of the drum is shaped to allow the passage of the light at least at the aforesaid first part 5 of the embossed filter segment 2 (for example, the seat of the drum may be made of a transparent material or it may be formed in a slit, slot or opening in the drum. Advantageously, this embodiment of the device 1 is particularly compact.
With reference to the embodiments of the embossed filter segments 2 illustrated in Figures 5-10, the embossed filter segment 2 comprises a third portion 22 having a first end 22a, which is adjacent and contiguous to the second end 21 b of the second portion 21 , and a second end 22b. More specifically, if the first portion 20 is embossed, then the third portion 22 is also embossed; if the first portion 20 is smooth (that is, not embossed), then the third portion 22 is also smooth.
The image capturing means 4 may be configured to capture an image of a second part 8 of the embossed filter segment 2 disposed in the seat 30 of the drum 3, the second part 8 being counterposed to the first part 5 and extending parallel to the axis of extension X of the embossed filter segment 2 at least from the second end 22b of the third portion 22 to the second end 21 b of the second portion 21 . In such a case, the second part 8 is diametrically opposite to the first part 5 and offset, in the direction of extension of the embossed filter segment 2, relative to the first part 5 (Figure 6B), Alternatively, the second part 8 might be facing and diametrically opposite to the first part 5.
An embossed filter segment 2 comprises a splice line on the tape of tipping paper 102 wrapped around the rod of filter material 104; the splice line is paraliei to the direction of extension of the embossed filter segment 2. Consequently, if the image captured is at the splice line, it might be complicated to calculate the length Li to an adequate degree of precision. Advantageously, capturing an image both of the first part 5 and the second part 8 ensures that the length Li can be calculated accurately. With reference to the embodiment of the embossed filter segment 2 illustrated in Figures 2-4, the second part 8 is counterposed (that is, diametrically opposite) to the first part 5 and extends parallel to the axis of extension X of the embossed filter segment 2 at least from the first end 20a of the first portion 20 to the first end 21 a of the second portion 21 (Figure 4). In such a case, the second part 8 might be counterposed to the first part 5, that is, facing and diametricaiiy opposite to the first part 5.
Alternatively, the second part 8 may extend at least from the second end 20b of the first portion 20 to the second end 21 b of the second portion 21 . In such a case, the second part 8 is diametricaiiy opposite to the first part 5 and offset, in the direction of extension X, relative to the first part 5.
The second part 8 of the embossed filter segment 2 whose image is captured extends preferably longitudinally. In other words, the second part 8 of the embossed filter segment 2 is greater in length in the direction parallel to the axis of extension X than it is in height in the direction at right angles to the axis of extension X.
More specifically, the image captured of the second part 8 of the embossed filter segment 2 is an image of the second part 8 from the front (this image being at most equal to 180 degrees of the circle of the embossed filter segment 2; preferably, the image is equal to 150 degrees of the circle of the embossed filter segment 2).
In this embodiment, in which the image of the second part 8 is captured, the image capturing means 4 comprise: a second camera which captures the image of the second part 8 of the embossed filter segment 2 disposed in the seat 30 of the drum 3; a second illuminator which illuminates at least the second part 8 of the embossed filter segment 2 disposed in the seat 30 of the drum 3.
The second camera and the second illuminator are driven in phase, or simultaneously. The image capturing means 4 may also comprise a second diaphragm between the second camera and the second illuminator. Advantageously, the light from the second illuminator is concentrated on the second part 8 of the embossed filter segment 2.
With reference in particular to Figure 1 1 , the production machine 100 for making embossed filter segments can make two embossed filter rods and feeds out pairs of embossed filter segments 2. In such a case, the device 1 may comprise a pair of (counter-rotating) conveyor drums - a first drum 70 and a second drum 71 - each of which receives one embossed filter segment 2 of the pair of embossed filter segments 2 feeding out of the machine 100. The first conveyor drum 70 transfers the embossed filter segments to the drum 3 on which at least the image of the first longitudinal portion 5 of the embossed filter segment 2 is captured.
The second conveyor drum 71 transfers the embossed filter segments 2 to a further drum 72, which is similar to the drum 3 and near which there is at least one camera 42 and one illuminator 43 to capture an image of at least a first longitudinal portion of the embossed filter segment 2 disposed in the seat of the drum 72.
According to the embodiment of the device 1 illustrated in the drawings, the spacing between the seats 30 on the drum 3 is double the spacing between the seats on the drum 72; the device 1 may comprises further conveyor drums 73, 74 (for example, two) disposed between the drum 3 and the further drum 72 to transfer the embossed filter segments 2 from the drum 3 to the further drum 72,
Described below is a method according to this invention for inspecting embossed filter segments 2. In particular, the method can be implemented by any of the embodiments of the device 1 described above.
The method comprises the following steps:
- placing an embossed filter segment 2 in a seat 30 of a drum 3, where the embossed filter segment 2 extends longitudinally along an axis of extension X and comprises at least a first portion 20 and a second portion 21 each having a first end 20a, 21 a and a second end 20b, 21 b; the second end 20b of the first portion 20 being adjacent and contiguous to the first end 21 a of the second portion 21 ; the first portion 20 or the second portion 21 being embossed;
- capturing an image of a first part 5 of the embossed filter segment 2, the first part 5 extending parallel to the axis of extension X of the embossed filter segment 2 at least from the first end 20a of the first portion 20 to the first end 21 a of the second portion 21 ;
- processing the image and calculating the length Li of the first portion 20 of the embossed filter segment 2 on the basis of the captured image.
Advantageously, the proposed method allows calculating the length Li because the image is captured after the embossed filter segment 2 has been suitably placed in the seat 30 of the drum 3.
The embossed filter segment 2 may be disposed in the seat 30 of the drum 3 by a production machine 100 which makes embossed filter segments 2, the machine 100 comprising embossing means 101 for embossing a tape of tipping paper and cutting means 109 for cutting an embossed filter rod 108 to obtain embossed filter segments 2. Preferably, the method comprises the step of driving the cutting means 109 and/or the embossing means 101 of the production machine 100 which makes embossed filter segments 2, on the basis of the calculated length Li .
Advantageously, an adequate length Li of the first portion 20 of the embossed filter segment 2 is ensured at all times. Furthermore, compared to the prior art, this method can be implemented easily and with inexpensive electronic circuitry, since the inspection is performed on the embossed filter segment 2 (and not on the filter rod) and a phase signal indicating the real position of the cut is not therefore necessary.
The method may also comprise the step of comparing the calculated length Li with a reference value. This step may be performed before the step of driving the cutting means 109 and/or the embossing means 101 of the production machine 100 which makes embossed filter segments 2, on the basis of the calculated length Li .
The method may also comprise the step of rejecting the embossed filterc segments whose length Li differs from the reference value; preferably, this step is performed after the step of comparing the calculated length Li with a reference value.
Preferably, the step of capturing the image of the first part 5 of the embossed filter segment 2 comprises the step of illuminating the first part 5 of the embossed filter segment 2. More specifically, the step of illuminating the first part 5 of the embossed filter segment 2 is performed in such a way that the light passes through the first part 5.
Advantageously, the image captured is particularly clear.
If the embossed filter segment 2 comprises a third portion 22 having a first end 22a, which is adjacent and contiguous to the second end 21 b of the second portion 21 , and a second end 22b, and if the third portion 22 is embossed only if the first portion 20 is embossed, then the method may comprise the step of capturing an image of a second part 8 of the embossed filter segment 2. The second part 8 is counterposed to the first part 5 and extends parallel to the axis of extension X of the embossed filter segment 2 at least from the second end 22b of the third portion 22 to the second end 21 b of the second portion 21 .
Thus, since the tape of tipping paper 102 wrapped around the rod of filter material 104 to form the embossed filter segment 2 has a splice line on it which is parallel to the direction of extension of the embossed filter segment 2, capturing the image both of the first part 5 and of the second part 8 ensures that the length Li can be calculated accurately.
Alternatively, the second part 8 might be facing and diametrically opposite to the first part 5.
With reference to the embodiment of the embossed filter segment 2 illustrated in Figures 2-4, the second part 8 is counterposed (that is, diametrically opposite) to the first part 5 and extends parallel to the axis of extension X of the embossed filter segment 2 at least from the first end 20a of the first portion 20 to the first end 21 a of the second portion 21 (Figure 4), In such a case, the second part 8 might be counterposed to the first part 5, that is, facing and diametrically opposite to the first part 5. Alternatively, the second part 8 may extend at least from the second end 20b of the first portion 20 to the second end 21 b of the second portion 21 . In such a case, the second part 8 is diametrically opposite to the first part 5 and offset, in the direction of extension X, relative to the first part 5, Preferably, the step of capturing the image of the second part 8 of the embossed filter segment 2 comprises the step of illuminating the second part 8 of the embossed filter segment 2. Further, the step of illuminating the second part 8 of the embossed filter segment 2 is preferably performed in such a way that the light passes through the second part 8. This invention also addresses an apparatus 10 for inspecting embossed filter segments 2. The apparatus 10 comprises: a production machine 100 which makes embossed filter segments 2, the machine 100 comprising embossing means 101 for embossing a tape of tipping paper and cutting means 109 for cutting an embossed filter rod 108 to obtain embossed filter segments 2; a device 1 for inspecting embossed filter segments 2 according to any one of the embodiments described above. More specifically, the processing unit 6 of the device 1 is connected to the cutting means 109 and/or to the embossing means 102 of the production machine 100 which makes embossed filter segments 2, so as to drive the cutting means 109 and/or the embossing means 102.

Claims

1 . A device (1 ) for inspecting embossed filter segments (2), where each embossed filter segment (2) extends longitudinally along an axis of extension (X) and comprises at least a first portion (20) and a second portion (21 ) each having a first end (20a, 21 a) and a second end (20b, 21 b); the second end (20b) of the first portion (20) being adjacent and contiguous to the first end (21 a) of the second portion (21 ); the first portion (20) or the second portion (21 ) being embossed;
the device (1 ) being characterized in that it comprises:
a drum (3) rotatable about a rotation axis (Y) and comprising a plurality of seats (30) for receiving in each one an embossed filter segment (2);
image capturing means (4) for capturing an image of a first part (5) of the embossed filter segment (2) disposed in the seat of the drum (3), the first part (5) extending parallel to the axis of extension (X) of the embossed filter segment (2) and at least from the first end (20a) of the first portion
(20) to the first end (21 a) of the second portion (21 );
a processing unit (6) for processing the aforesaid image and which, based on the image, calculates the length (L i) of the first portion (20) of the embossed filter segment (2).
2. The device (1 ) according to claim 1 , wherein:
the drum (3) receives the embossed filter segments (2) from a production machine (100) which makes embossed filter segments (2), the machine (100) comprising embossing means (101 ) for embossing a tape of tipping paper and cutting means (109) for cutting an embossed filter rod (108) to obtain embossed filter segments (2);
the processing unit (6) is connectable to the cutting means (109) and/or to the embossing means (101 ) of the production machine (100) which makes embossed filter segments (2), so as to drive the cutting means (109) and/or the embossing means (101 ) on the basis of the calculated length (Li).
3. The device (1 ) according to either of the preceding claims, wherein the image capturing means (4) comprise: a first camera (40) which captures the image of the first part (5) of the embossed filter segment (2) disposed in the seat (30) of the drum (3); a first illuminator (41 ) illuminating at least the first part (5) of the embossed filter segment (2) disposed in the seat (30) of the drum (3).
4. The device (1 ) according to claim 3, wherein the first camera (40), the first illuminator (41 ) and the drum (3) are mutually disposed so that, during image capture, the embossed filter segment (2) is positioned between the first camera (40) and the first illuminator (41 ).
5. The device (1 ) according to claim 3 or 4, wherein:
each seat (30) of the drum (3) is configured to receive only partially the embossed filter segment (2) so that at least the first part (5) of the embossed filter segment (2) protrudes from the drum (3);
the first camera (40) and the first illuminator (41 ) are counterposed to each other and side by side with the drum (3).
6. The device (1 ) according to claim 3 or 4, wherein the first illuminator or the first camera is disposed at least partially inside the drum and wherein each seat of the drum is shaped to allow the passage of the light at least at said first part (5) of the embossed filter segment (2).
7. The device (1 ) according to any one of the preceding claims, wherein:
the embossed filter segment (2) comprises a third portion (22) having a first end (22a), which is adjacent and contiguous to the second end (21 b) of the second portion (21 ), and a second end (22b);
the third portion (22) is embossed only if the first portion (20) is embossed; the image capturing means (4) are configured to capture an image of a second part (8) of the embossed filter segment (2) disposed in the seat (30) of the drum (3), the second part (8) being counterposed to the first part (5) and extending parallel to the axis of extension (X) of the embossed filter segment (2) at least from the second end (22b) of the third portion (22) to the second end (21 b) of the second portion (21 ).
8. The device (1 ) according to claim 7, wherein the image capturing means (4) comprise:
a second camera which captures the image of the second part (8) of the embossed filter segment (2) disposed in the seat (30) of the drum (3); a second illuminator illuminating at least the second part (8) of the embossed filter segment (2) disposed in the seat (30) of the drum (3).
9. The device (1 ) according to any one of the preceding claims, comprising rejection means (7) which are connected to the processing unit (6) and which are driven by the processing unit (6) to reject the embossed filter segment (2) on the basis of the calculated length (Li).
10. A method for inspecting embossed filter segments (2), characterized in that it comprises the following steps in sequence:
placing an embossed filter segment (2) in a seat (30) of a drum (3), where the embossed filter segment (2) extends longitudinally along an axis of extension (X) and comprises at least a first portion (20) and a second portion (21 ) each having a first end (20a, 21 a) and a second end (20b, 21 b); the second end (20b) of the first portion (20) being adjacent and contiguous to the first end (21 a) of the second portion (21 ); the first portion (20) or the second portion (21 ) being embossed;
capturing an image of a first part (5) of the embossed filter segment (2), the first part (5) extending parallel to the axis of extension (X) of the embossed filter segment (2) at least from the first end (20a) of the first portion (20) to the first end (21 a) of the second portion (21 );
processing the image and calculating the length (Li) of the first portion (20) of the embossed filter segment (2) on the basis of the captured image.
1 1 . The method according to claim 10, wherein the embossed filter segment (2) is disposed in the seat (30) of the drum (3) by a production machine (100) which makes embossed filter segments (2), the machine (100) comprising embossing means (101 ) for embossing a tape of tipping paper and cutting means (109) for cutting an embossed filter rod (108) to obtain embossed filter segments (2);
the method comprising the step of driving the cutting means (109) and/or the embossing means (101 ) of the production machine (100) which makes embossed filter segments (2), on the basis of the calculated length (Li). 12. The method according to claim 10 or 1 1 , wherein the step of capturing the image of the first part (5) of the embossed filter segment (2) comprises the step of illuminating the first part (5) of the embossed filter segment (2).
13. The method according to claim 12, wherein the step of illuminating the first part (5) of the embossed filter segment (2) is performed in such a way that the light passes through the first part (5).
14. The method according to any one of claims from 10 to 13, wherein the embossed filter segment (2) comprises a third portion (22) having a first end (22a), which is adjacent and contiguous to the second end (21 b) of the second portion (21 ), and a second end (22b); the third portion (22) being embossed only if the first portion (20) is embossed; the m ethod comprising the step of capturing an image of a second part (8) of the embossed filter segment (2), the second part (8) being counterposed to the first part (5) and extending parallel to the axis of extension (X) of the embossed filter segment (2) at least from the second end (22b) of the third portion (22) to the second end (21 b) of the second portion (21 ).
15. An apparatus (10) for inspecting embossed filter segments (2), comprising:
a production machine (100) which makes embossed filter segments (2), the machine (100) comprising embossing means (101 ) for embossing a tape of tipping paper and cutting means (109) for cutting an embossed filter rod (108) to obtain embossed filter segments (2);
a device (1 ) for inspecting embossed filter segments (2) according to any one of claims 1 to 9;
the processing unit (6) of the device (1 ) being connected to the cutting means (109) and/or to the embossing means (101 ) of the production machine (100) which makes embossed filter segments (2), so as to drive the cutting means (109) and/or the embossing means (101 ).
PCT/IB2018/052449 2017-04-11 2018-04-09 Device, method and apparatus for inspecting embossed filter segments WO2018189645A1 (en)

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KR1020197029973A KR102640310B1 (en) 2017-04-11 2018-04-09 Apparatus, method and apparatus for inspecting embossed filter segments
JP2019555838A JP7157076B2 (en) 2017-04-11 2018-04-09 Device, method and apparatus for inspecting embossed filter segments
EP18718523.6A EP3609353A1 (en) 2017-04-11 2018-04-09 Device, method and apparatus for inspecting embossed filter segments
CN201880022175.9A CN110519999B (en) 2017-04-11 2018-04-09 Device, method and apparatus for inspecting embossed filters

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KR20190136013A (en) 2019-12-09
JP7157076B2 (en) 2022-10-19
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JP2020512826A (en) 2020-04-30
CN110519999B (en) 2022-09-30

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