EP2765876A1 - Conveyor for transferring rod-shaped smokers' articles - Google Patents

Conveyor for transferring rod-shaped smokers' articles

Info

Publication number
EP2765876A1
EP2765876A1 EP12784712.7A EP12784712A EP2765876A1 EP 2765876 A1 EP2765876 A1 EP 2765876A1 EP 12784712 A EP12784712 A EP 12784712A EP 2765876 A1 EP2765876 A1 EP 2765876A1
Authority
EP
European Patent Office
Prior art keywords
flute
tubular element
drum
conveyor
articles
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP12784712.7A
Other languages
German (de)
French (fr)
Other versions
EP2765876B1 (en
Inventor
Massimo Sartoni
Fulvio Pastore
Lorenzo SELMI
Nicola VISCANTI
Paolo Campo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GD SpA
Original Assignee
GD SpA
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 GD SpA filed Critical GD SpA
Priority to PL12784712T priority Critical patent/PL2765876T3/en
Publication of EP2765876A1 publication Critical patent/EP2765876A1/en
Application granted granted Critical
Publication of EP2765876B1 publication Critical patent/EP2765876B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • A24C5/322—Transporting cigarettes during manufacturing
    • A24C5/327—Construction details of the cigarette transport drum

Definitions

  • This invention relates to a conveyor for transferring rod- shaped smokers' articles.
  • the invention has for an object a conveyor for transferring cigarettes or filters or filter plugs, to which reference is hereinafter made without thereby limiting the scope of the invention.
  • Drums of the above mentioned type are commonly used, for example, in machines for attaching filter tips to cigarettes and in machines for making filter plugs.
  • Each flute on these drums is provided with a plurality of radial holes, each of which has one end facing outside the drum and the other end, positioned inside the drum and, during the period in which a smokers' article must be held in contact with the flute itself, in communication with a chamber which is in turn in communication with a source of suction.
  • a first disadvantage lies in the fact that the respective holes of all the flutes which, at any given time, are holding a smokers' article, are connected to the same suction chamber. Under these conditions, if one smokers' article becomes detached from the respective flute for any reason, the holes which previously applied suction to it suddenly come into communication with the outside atmosphere, reducing the suction effect of all the other holes in the flutes which are holding other smoker's articles at that moment, with the possible result that the suction applied through the other holes becomes insufficient to hold the other smokers' articles.
  • a further disadvantage lies in the fact that the pneumatic circuits which, internally of the drum, lead to the suction holes are, inevitably, relatively long and large in volume, with the result that the response times for increasing or decreasing the suction applied through the selfsame holes, especially in the event of critical conditions for the machine in which the drum is installed, are relatively long.
  • This invention has for aim to provide a conveyor for transferring rod-shaped smokers' articles which wholly or partly overcomes the disadvantages described above with reference to the prior art and which is at once relatively simple and inexpensive to construct.
  • a conveyor for transferring rod- shaped smokers' articles as claimed in the appended claims is provided.
  • FIG. 1 is a cross section of a conveyor for transferring rod-shaped smokers' articles according to this invention
  • FIG. 1 is a schematic front view of the conveyor of Figure 1;
  • FIG. 3 is a schematic view, partly in perspective and partly in cross section, of the conveyor of Figures 1 and 2;
  • FIG. 4 is a perspective view of a detail shown in cross section in Figures Detailed Description of the Preferred Embodiments of the Invention
  • the numeral 1 denotes in its entirety a conveyor, comprising a drum which revolves continuously about a horizontal axis A and which can be used, for example in a machine for attaching filter tips to cigarettes or in a machine for making filter rods (not illustrated).
  • the conveyor 1 might, however, be of a different type, for example a conveyor like the one described in patent IT1293300 (called “transferred device” in that patent), or even a belt conveyor, or it might revolve about a non-horizontal axis.
  • drum drum conveyor
  • the drum 1 is provided, on its cylindrical peripheral surface, with a plurality of elongate flutes 2 which are angularly equispaced and which run parallel to the axis A.
  • Each flute 2 is designed to receive and hold within it by suction a smokers' article 3 consisting, for example, of a cigarette or a filter plug.
  • Each flute 2 (or row of flutes 2 mutually aligned axially, shown in Figure 1) has, associated with it, a suction means 4 which is preferably interposed between the selfsame flute 2 and the axis A of the drum 1.
  • Each suction means 4 is enclosed and coaxially fixed in a respective elongate housing 5 which is formed in the drum 1 parallel to the axis A and whose ends are open and in communication with respective sides of the drum 1 itself. More specifically, preferably, each suction means 4 is interposed between the flute 2 associated therewith and the axis of rotation A of the drum 1.
  • Each suction means 4 comprises a Venturi-effect tubular element 6, that is to say, an element which is internally shaped in such a way as to create the Venturi effect.
  • the tubular element 6 is open at its two opposite ends and is provided, on its cylindrical peripheral surface, with a plurality of holes 7 (six holes in the example illustrated in Figure 4).
  • the tubular element 6 has three portions 14 which are positioned in cascade and in which the Venturi effect is created. Each of the three portions 14 communicates with the outside through two holes 7.
  • each tubular element 6 enclosed within a housing 5 is surrounded by a chamber 8 whose volume is as a small as possible, also extending into a portion of the drum 1 without the tubular element 6, and which communicates with the inside of the respective tubular element 6 through the holes 7.
  • Each chamber 8 communicates with the outside of the drum 1 only through some tubular ducts or holes 9 of small length and diameter, each of which constitutes a hole having one end giving onto the chamber 8 itself and the other end giving onto a surface of the flute 2 associated with the tubular element 6 surrounded by the selfsame chamber 8.
  • Each flute 2 may have one or more holes 9 associated with it, as required.
  • each tubular element 6 are, in use, occupied by air at a pressure below atmospheric pressure and communicate, through the holes 7 and the chamber 8, with one end of at least one of the tubular ducts or holes 9.
  • each tubular element 6 through which compressed air is fed in is sealedly connected to a valve by means of a fixed sealing ring 13.
  • the ring 13 is mounted on a fixed wall 11 placed alongside the drum 1.
  • the valve is defined by a slot 10 formed in the wall 11 and communicates ( Figure 3) with a source of compressed air schematically represented as a block 12.
  • the slot 10 covers only one angular sector of the drum 1 so it feeds compressed air only in the tubular elements 6 which are in transit in the zone where the smokers' article 3 must be held within respective elongate flutes 2 ( Figure 2).
  • the smokers' articles 3 which reach the elongate flutes 2 of the drum 1 are captured by the flutes 2 thanks to the suction applied, on the bottom of the selfsame flutes 2, by the holes 9.
  • the suction is created by the delivery of compressed air by the compressed air source 12 to the slot 10. From the slot 10, the air flows into the tubular elements 6 associated with the flutes 2 which must receive the smokers' articles 3, generating negative pressure in the chambers 8 and in the holes 9 associated with those flutes 2.
  • each tubular element 6 may be made to flow either into a silenced manifold (not illustrated), or into the atmosphere (after being made to pass through suitable silencers.
  • suction means 4 comprising the tubular elements 6 makes it possible to avoid detachment of one smokers' article 3 from the respective flute 2 from having negative effects on the retaining action applied to other smokers' articles 3 in contact with the respective flutes 2.
  • the tubular elements 6 in the drum 1 can operate substantially independently of each other although they receive compressed air from a common slot 10 since their operation is not affected by whether or not a smokers' article 3 is present in the flutes 2.
  • the zones covered by the air used to hold the smokers' articles 3 within the flutes 2 are self-cleaned.
  • the compressed air jets contribute to continuously cleaning the ducts in these zones.
  • the conveyor 1 described also fully achieves the preset aims first of all because the pneumatic circuits leading to the holes 9 inside the drum 1 are short and small in volume, with the result that the response times for increasing or decreasing the suction applied through the holes 9 themselves, especially in the event of critical conditions for the machine in which the drum 1 is installed, are extremely short.
  • the resulting reduced suction does not affect all the flutes 2 which are holding a smokers' article 3 at that moment, which means that the negative pressure that must be generated by the tubular elements 6 is less than that normally required in prior art conveyors, which in turn means less noise produced by the conveyor 1, lower energy consumption and a reduction in the risk that the suction applied through the holes 9 is insufficient to hold the other smokers' articles 3.

Landscapes

  • Specific Conveyance Elements (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Belt Conveyors (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)

Abstract

A conveyor (1) for transferring rod-shaped smokers' articles (3) comprises a plurality of flutes (2) suitable for receiving respective smokers' articles (3) and holding them within by suction applied, for each flute (2), through at least one hole (9) having a first end which opens onto a surface of the flute (2) itself; each flute (2) has, associated with it, a suction means (4) comprising a Venturi-effect tubular element having one end connected to a compressed air source (12); the tubular element is provided with at least one internal portion (14) which, in use, is occupied by air at a pressure below atmospheric pressure, and that internal portion (14) communicates with the second end of the hole (9).

Description

Conveyor for transferring rod- shaped smokers' articles
Description
Technical Field
This invention relates to a conveyor for transferring rod- shaped smokers' articles.
More specifically, the invention has for an object a conveyor for transferring cigarettes or filters or filter plugs, to which reference is hereinafter made without thereby limiting the scope of the invention.
This description refers, without limiting the scope of the invention, to a drum conveyor rotatable about a respective axis and peripherally provided with a plurality of seats, angularly equispaced from each other and consisting of flutes running parallel to the drum axis and able to hold the smokers' articles within them by applying suction to them. Background Art
Drums of the above mentioned type are commonly used, for example, in machines for attaching filter tips to cigarettes and in machines for making filter plugs.
Each flute on these drums is provided with a plurality of radial holes, each of which has one end facing outside the drum and the other end, positioned inside the drum and, during the period in which a smokers' article must be held in contact with the flute itself, in communication with a chamber which is in turn in communication with a source of suction.
The solution described has several disadvantages.
A first disadvantage lies in the fact that the respective holes of all the flutes which, at any given time, are holding a smokers' article, are connected to the same suction chamber. Under these conditions, if one smokers' article becomes detached from the respective flute for any reason, the holes which previously applied suction to it suddenly come into communication with the outside atmosphere, reducing the suction effect of all the other holes in the flutes which are holding other smoker's articles at that moment, with the possible result that the suction applied through the other holes becomes insufficient to hold the other smokers' articles. A further disadvantage lies in the fact that the pneumatic circuits which, internally of the drum, lead to the suction holes are, inevitably, relatively long and large in volume, with the result that the response times for increasing or decreasing the suction applied through the selfsame holes, especially in the event of critical conditions for the machine in which the drum is installed, are relatively long.
Yet another disadvantage is due to the noise created by the suction system. That is because in prior art conveyors the suction applied through the holes must be very high, greater than strictly necessary, in order to compensate for a possible reduction in the suction effect of all the flutes leading to the smokers' articles in all the flutes falling out as a result of one smoker's article becoming detached from the respective flute for any reason.
Moreover, the use of such a high suction level obviously involves wasteful expenditure of energy, with excessive costs due to higher than necessary electricity consumption of the oversize pumps needed to generate the suction.
Disclosure of the Invention
This invention has for aim to provide a conveyor for transferring rod-shaped smokers' articles which wholly or partly overcomes the disadvantages described above with reference to the prior art and which is at once relatively simple and inexpensive to construct.
According to the invention, a conveyor for transferring rod- shaped smokers' articles as claimed in the appended claims is provided.
Brief Description of the Drawings
The invention is described below with reference to the accompanying drawings, which illustrate a non-limiting embodiment of it, and in which:
- Figure 1 is a cross section of a conveyor for transferring rod-shaped smokers' articles according to this invention;
- Figure 2 is a schematic front view of the conveyor of Figure 1;
- Figure 3 is a schematic view, partly in perspective and partly in cross section, of the conveyor of Figures 1 and 2; and
- Figure 4 is a perspective view of a detail shown in cross section in Figures Detailed Description of the Preferred Embodiments of the Invention
With reference to Figures 1-3, the numeral 1 denotes in its entirety a conveyor, comprising a drum which revolves continuously about a horizontal axis A and which can be used, for example in a machine for attaching filter tips to cigarettes or in a machine for making filter rods (not illustrated). The conveyor 1 might, however, be of a different type, for example a conveyor like the one described in patent IT1293300 (called "transferred device" in that patent), or even a belt conveyor, or it might revolve about a non-horizontal axis.
For brevity, the description below refers to a drum conveyor which will be called "drum" for short, but it will be obvious to one skilled in the trade that the description might apply to any other type of conveyor.
As shown in particular in Figure 2, the drum 1 is provided, on its cylindrical peripheral surface, with a plurality of elongate flutes 2 which are angularly equispaced and which run parallel to the axis A. Each flute 2 is designed to receive and hold within it by suction a smokers' article 3 consisting, for example, of a cigarette or a filter plug.
Each flute 2 (or row of flutes 2 mutually aligned axially, shown in Figure 1) has, associated with it, a suction means 4 which is preferably interposed between the selfsame flute 2 and the axis A of the drum 1.
Each suction means 4 is enclosed and coaxially fixed in a respective elongate housing 5 which is formed in the drum 1 parallel to the axis A and whose ends are open and in communication with respective sides of the drum 1 itself. More specifically, preferably, each suction means 4 is interposed between the flute 2 associated therewith and the axis of rotation A of the drum 1.
Each suction means 4 comprises a Venturi-effect tubular element 6, that is to say, an element which is internally shaped in such a way as to create the Venturi effect. The tubular element 6 is open at its two opposite ends and is provided, on its cylindrical peripheral surface, with a plurality of holes 7 (six holes in the example illustrated in Figure 4). When compressed air is fed in at one end of the tubular element 6 (the right-hand end in Figures 1, 3 and 4), the air pressure in at least one internal portion 14 drops below atmospheric pressure as a result of the tubular element 6 itself being made in a suitable size, which can be easily calculated by one skilled in the art. More specifically, as better illustrated in Figure 4, the tubular element 6 has three portions 14 which are positioned in cascade and in which the Venturi effect is created. Each of the three portions 14 communicates with the outside through two holes 7.
As shown in Figures 1 and 3, the radially peripheral surface of each tubular element 6 enclosed within a housing 5 is surrounded by a chamber 8 whose volume is as a small as possible, also extending into a portion of the drum 1 without the tubular element 6, and which communicates with the inside of the respective tubular element 6 through the holes 7. Each chamber 8 communicates with the outside of the drum 1 only through some tubular ducts or holes 9 of small length and diameter, each of which constitutes a hole having one end giving onto the chamber 8 itself and the other end giving onto a surface of the flute 2 associated with the tubular element 6 surrounded by the selfsame chamber 8. Each flute 2 may have one or more holes 9 associated with it, as required.
In accordance with the above, the internal portions 14 of each tubular element 6 are, in use, occupied by air at a pressure below atmospheric pressure and communicate, through the holes 7 and the chamber 8, with one end of at least one of the tubular ducts or holes 9.
The end of each tubular element 6 through which compressed air is fed in is sealedly connected to a valve by means of a fixed sealing ring 13. The ring 13 is mounted on a fixed wall 11 placed alongside the drum 1. The valve is defined by a slot 10 formed in the wall 11 and communicates (Figure 3) with a source of compressed air schematically represented as a block 12.
The slot 10 covers only one angular sector of the drum 1 so it feeds compressed air only in the tubular elements 6 which are in transit in the zone where the smokers' article 3 must be held within respective elongate flutes 2 (Figure 2).
In use, the smokers' articles 3 which reach the elongate flutes 2 of the drum 1 are captured by the flutes 2 thanks to the suction applied, on the bottom of the selfsame flutes 2, by the holes 9. The suction is created by the delivery of compressed air by the compressed air source 12 to the slot 10. From the slot 10, the air flows into the tubular elements 6 associated with the flutes 2 which must receive the smokers' articles 3, generating negative pressure in the chambers 8 and in the holes 9 associated with those flutes 2.
The air leaving each tubular element 6 may be made to flow either into a silenced manifold (not illustrated), or into the atmosphere (after being made to pass through suitable silencers.
It should be noted that the described use of suction means 4 comprising the tubular elements 6 makes it possible to avoid detachment of one smokers' article 3 from the respective flute 2 from having negative effects on the retaining action applied to other smokers' articles 3 in contact with the respective flutes 2. Indeed, it has been found, in this regard, that the tubular elements 6 in the drum 1 can operate substantially independently of each other although they receive compressed air from a common slot 10 since their operation is not affected by whether or not a smokers' article 3 is present in the flutes 2.
It should be noted that in the conveyor 1 for transferring rod-shaped smokers' articles 3 according to the invention the zones covered by the air used to hold the smokers' articles 3 within the flutes 2 are self-cleaned. In effect, the compressed air jets contribute to continuously cleaning the ducts in these zones.
The conveyor 1 described also fully achieves the preset aims first of all because the pneumatic circuits leading to the holes 9 inside the drum 1 are short and small in volume, with the result that the response times for increasing or decreasing the suction applied through the holes 9 themselves, especially in the event of critical conditions for the machine in which the drum 1 is installed, are extremely short.
Moreover, if one smokers' article 3 is detached from the respective flute 2, the resulting reduced suction does not affect all the flutes 2 which are holding a smokers' article 3 at that moment, which means that the negative pressure that must be generated by the tubular elements 6 is less than that normally required in prior art conveyors, which in turn means less noise produced by the conveyor 1, lower energy consumption and a reduction in the risk that the suction applied through the holes 9 is insufficient to hold the other smokers' articles 3.

Claims

Claims
1. A conveyor for transferring rod- shaped smokers' articles, comprising a plurality of flutes (2) suitable for receiving respective smokers' articles (3) and holding them within by suction applied, for each flute (2), through at least one hole (9) having a first end which opens onto a surface of the flute (2) itself, characterized in that each flute (2) has, associated with it, a suction means (4) comprising a Venturi-effect tubular element (6) having one end connected to a compressed air source (12); the tubular element (6) being provided with at least one internal portion (14) which, in use, is occupied by air at a pressure below atmospheric pressure, the internal portion communicating with the second end of the at least one hole (9).
2. The conveyor according to claim 1, characterized in that it comprises a rotary drum (1) which revolves about an axis (A) and whose peripheral cylindrical surface is furnished with a plurality of elongate flutes (2), spaced at equal angular intervals from each other and running parallel to the selfsame axis (A); each flute (2) having, associated with it, a suction means (4) comprising a Venturi-effect tubular element (6).
3. The conveyor according to claim 2, characterized in that the suction means (4) of each flute (2) is positioned between the flute (2) itself and the axis of rotation (A) of the drum (1).
4. The conveyor according to claim 2 or 3, characterized in that each suction means (4) is enclosed within a respective housing (5) formed in the drum (1).
5. The conveyor according to claim 4, characterized in that the housing (5) formed in the drum (1) extends parallel to the axis (A) of the selfsame drum (5).
6. The conveyor according to claim 4 or 5, characterized in that each suction means (4) comprises a tubular element (6) which is open at the two opposite ends of it and whose peripheral surface is in communication with a chamber (8) which communicates both with the inside of the tubular element (6) itself and with the at least one hole (9) having a first end opening onto a surface of the flute (2) associated with the selfsame suction means (4).
7. The conveyor according to claim 6, characterized in that one end of each tubular element (6) is connected by an airtight joint to a valve (10) which communicates with a compressed air source (12).
EP12784712.7A 2011-10-10 2012-09-28 Conveyor for transferring rod-shaped smoker's articles Not-in-force EP2765876B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12784712T PL2765876T3 (en) 2011-10-10 2012-09-28 Conveyor for transferring rod-shaped smoker's articles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000578A ITBO20110578A1 (en) 2011-10-10 2011-10-10 CONVEYOR FOR THE TRANSFER OF SMOKE ARTICLES IN THE FORM OF A FINGER.
PCT/IB2012/055185 WO2013054222A1 (en) 2011-10-10 2012-09-28 Conveyor for transferring rod-shaped smokers' articles

Publications (2)

Publication Number Publication Date
EP2765876A1 true EP2765876A1 (en) 2014-08-20
EP2765876B1 EP2765876B1 (en) 2017-12-27

Family

ID=44936348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12784712.7A Not-in-force EP2765876B1 (en) 2011-10-10 2012-09-28 Conveyor for transferring rod-shaped smoker's articles

Country Status (5)

Country Link
EP (1) EP2765876B1 (en)
CN (1) CN103889255B (en)
IT (1) ITBO20110578A1 (en)
PL (1) PL2765876T3 (en)
WO (1) WO2013054222A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014204707A1 (en) * 2014-03-13 2015-09-17 Hauni Maschinenbau Ag Receiving device for receiving articles of the tobacco processing industry
DE102015110147A1 (en) * 2015-06-24 2016-12-29 Hauni Maschinenbau Gmbh Rotary conveying device for conveying articles of the tobacco processing industry and method for conveying such articles
ITUA20161484A1 (en) * 2016-03-10 2017-09-10 Gd Spa Device and method of rolling cigarettes, cigarettes with filter or filters.
IT201900003553A1 (en) * 2019-03-12 2020-09-12 Gtk Timek Group Sa "HANDLING BAR FOR LAMINATED OR FILM SUPPORTS"

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Publication number Priority date Publication date Assignee Title
DE2121366A1 (en) * 1971-04-30 1972-11-02 Hauni-Werke Körber & Co KG, 2050 Hamburg Method and device for testing rod-shaped articles in the tobacco processing industry that are conveyed transversely axially
DE2234094C2 (en) * 1972-07-12 1986-01-16 Hauni-Werke Körber & Co KG, 2050 Hamburg Method and device for testing the wrapping of rod-shaped articles in the tobacco processing industry
DE2359193A1 (en) * 1973-11-28 1975-06-12 Hauni Werke Koerber & Co Kg CIGARETTE STRANDING MACHINE
DE2833346A1 (en) * 1978-07-29 1980-02-14 Hauni Werke Koerber & Co Kg DEVICE FOR PROMOTING ARTICLES FROM THE TOBACCO PROCESSING INDUSTRY
DE4329084A1 (en) * 1993-08-30 1995-03-02 Hauni Werke Koerber & Co Kg Device for transferring rod-shaped articles of the tobacco processing industry from a supply into a pneumatic conveying line
IT1293300B1 (en) 1997-08-06 1999-02-16 Gd Spa CIGARETTE CUTTING TRANSFER DEVICE.
DE102010010075B3 (en) * 2010-02-25 2011-06-22 Hauni Maschinenbau AG, 21033 Apparatus and method for transferring rod-shaped articles of the tobacco processing industry from a magazine into a delivery line

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Title
See references of WO2013054222A1 *

Also Published As

Publication number Publication date
PL2765876T3 (en) 2018-06-29
CN103889255A (en) 2014-06-25
ITBO20110578A1 (en) 2013-04-11
EP2765876B1 (en) 2017-12-27
WO2013054222A1 (en) 2013-04-18
CN103889255B (en) 2017-04-12

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