EP2704979B1 - Container closure sterilising unit - Google Patents

Container closure sterilising unit Download PDF

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Publication number
EP2704979B1
EP2704979B1 EP12717768.1A EP12717768A EP2704979B1 EP 2704979 B1 EP2704979 B1 EP 2704979B1 EP 12717768 A EP12717768 A EP 12717768A EP 2704979 B1 EP2704979 B1 EP 2704979B1
Authority
EP
European Patent Office
Prior art keywords
closures
helical coil
unit
sterilising
guides
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.)
Not-in-force
Application number
EP12717768.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2704979A1 (en
Inventor
Andrea Trevisan
Emilio GAINOTTI CAVAZZINI
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.)
Sidel SpA
Original Assignee
Sidel 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 Sidel SpA filed Critical Sidel SpA
Publication of EP2704979A1 publication Critical patent/EP2704979A1/en
Application granted granted Critical
Publication of EP2704979B1 publication Critical patent/EP2704979B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
    • B65B55/02—Sterilising, e.g. of complete packages
    • B65B55/04—Sterilising wrappers or receptacles prior to, or during, packaging
    • B65B55/08—Sterilising wrappers or receptacles prior to, or during, packaging by irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B3/00—Closing bottles, jars or similar containers by applying caps
    • B67B3/003—Pretreatment of caps, e.g. cleaning, steaming, heating or sterilizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B3/00—Closing bottles, jars or similar containers by applying caps
    • B67B3/02—Closing bottles, jars or similar containers by applying caps by applying flanged caps, e.g. crown caps, and securing by deformation of flanges
    • B67B3/06—Feeding caps to capping heads

Definitions

  • the present invention relates to the field of container processing, with particular reference to the bottling industry.
  • the present invention relates to a unit for sterilising closures to be applied on relative containers.
  • sterilisation of closures is obtained by means of ionising radiation or of chemical agents.
  • Ionising radiation consists of particles or electromagnetic waves that are energetic enough to detach electrons from atoms or molecules, thus ionising them.
  • Direct ionisation induced by single particles or single photons produces free radicals, i.e. atoms or molecules containing unpaired electrons, that tend to be especially chemically reactive due to their electronic structure.
  • interaction between a particle or photon and an atom or molecule also frees one or more electrons, which are, in turn, capable of generating additional ions.
  • electron beam emitters are commonly used in the art.
  • electron beams are directed on the object to be sterilised in such a manner that electrons can act directly on pathogenic agents, such as viruses, funguses or bacteria, in order to damage the DNA thereof and deactivate the proteins and enzymes necessary to their survival.
  • Sterilisation by means of ionising sources has the important advantage of reducing operating costs of filling/bottling plants, since consumption of chemical agents, water and sterilising substances is greatly reduced if not eliminated altogether.
  • sources of ionising radiation as the sterilising agent positively affects environmental issues such as chemical residue disposal.
  • Apparatus of this type have a major drawback in that they do not guarantee complete, reliable sterilisation.
  • shadow zones tend typically to form where the surfaces of two adjacent closures arranged in single file on the feed chute contact each other.
  • ionising radiations fail to fully perform their function. Consequently, pathogenic agents present in those shadow zones are very likely to not be eliminated, the overall sterility of the closures, be they caps or stoppers, being thus greatly compromised.
  • WO2009/139013 discloses a sterilising unit associated with a device for feeding container closures, the device comprising guides for conveying the closures to a treatment station and a star wheel with a plurality of projections and recesses suitable for receiving the closures, operatively associated with the guides, and adapted to deliver the closures to the treatment station at evenly spaced time intervals.
  • the star wheel can move alternatively between a position for blocking the queue of closures approaching the sterilising station and a position enabling the forward movement thereof towards the sterilising station.
  • the star wheel needs to be actuated in such a manner that a sufficient initial velocity is imparted to each and every closure. Besides, for ensuring that adjacent closures are properly evenly spaced, actuation of the star wheels needs to be carefully timed and controlled.
  • a solution such as the one known from WO2009/139013 has therefore the drawback of certain inherent design constraints, and it is only by precisely controlling how the star wheel is actuated, both in terms of the frequency with which it is alternately rotated and stopped, as well as of the speed imparted by the star wheel on every single closure.
  • a sterilising unit of this type may become complicated to adapt a sterilising unit of this type to closures of a different size or with different characteristics (e.g. material and, consequently, friction coefficient with respect to the guide surfaces; a different minimum exposure time to the sterilising agent, and so forth). Furthermore, difficulties could arise if the plant productivity had to be increased, in that the settings determining the star wheel actuation cycles would have to be carefully revised. In other words, a sterilisation unit of this type may not be fully satisfactory in terms of adjustability and adaptability.
  • Number 1 in Figure 1 indicates as a whole a container closure sterilising unit, in particular for caps and stoppers to be applied to relative containers, such as bottles.
  • Sterilising unit 1 comprises at least one closure treatment station 2 and a device 3 for feeding a plurality of container closures 100 (see Figures 2 and 3 ) to closure treatment station 2.
  • feeding device 3 comprises guiding means 4 defining: an entrance 5 for closures 100, which entrance 5 communicates with loading means or a closure storage unit (not shown) from which closures 100 to be sterilised are supplied; a conveying path P comprising at least one linear tract P1 (i.e. one tract having constant inclination relative to the vertical direction) and along which the at least one treatment station 2 is arranged; and an exit 6 for closures, which exit 6 communicates with a further unit (not shown) arranged downstream from sterilising unit 1.
  • guiding means 4 defining: an entrance 5 for closures 100, which entrance 5 communicates with loading means or a closure storage unit (not shown) from which closures 100 to be sterilised are supplied; a conveying path P comprising at least one linear tract P1 (i.e. one tract having constant inclination relative to the vertical direction) and along which the at least one treatment station 2 is arranged; and an exit 6 for closures, which exit 6 communicates with a further unit (not shown) arranged downstream from ster
  • the feeding device 3 comprises (see Figure 2 ) conveying means 7 operatively active on a single file of closures 100 to advance them towards treatment station 2 evenly spaced from one another along conveying path P.
  • conveying means 7 are operatively associated with guiding means 4.
  • the conveying means 7 comprise a helical coil 8 (see also Figure 3 ) which is operatively active on a queue of closures 100 to cause said closures to advance along conveying path P and to be fed to the at least one treatment station 2 evenly spaced from one another along conveying path P.
  • a longitudinal axis H of helical coil 8 extends parallel to tract P1 of conveying path P.
  • helical coil 8 is born by a shaft 9 substantially coaxial with coil 8 and driven by motor means 10. More particularly, helical coil 8 is preferably fixed to shaft 9 by a plurality of support elements 11 extending radially from shaft 9 and arranged evenly spaced along the latter. In turn, shaft 9 is rotatably mounted at shaft end mount portions.
  • conveying means 7 are preferably driven by a brushless-type electric motor
  • driving means of a mechanical type e.g. by means of gears
  • guiding means 4 preferably comprise a plurality of guides 12.
  • Guides 12 may, at least for a portion thereof, be inclined relative to the horizontal direction, so as to permit closures 100 to slide by gravity.
  • guides 12 comprise, in succession relative to an advancing direction of closures 100 along path P, an input section 13, a main section 14 and an output section 15, each section being more inclined relative to the horizontal direction than the previous one (relative to said advancing direction of the closures).
  • guides 12 comprise, in succession relative to an advancing direction of closures 100 along path P, an input section 13, a main section 14 and an output section 15, each section being more inclined relative to the horizontal direction than the previous one (relative to said advancing direction of the closures).
  • guides 12 comprise, in succession relative to an advancing direction of closures 100 along path P, an input section 13, a main section 14 and an output section 15, each section being more inclined relative to the horizontal direction than the previous one (relative to said advancing direction of the closures).
  • a container closure 100 such as a cap or stopper typically has a substantially cylindrical shape extending along a respective axis B. Accordingly, every container closure shall have a top surface 101 substantially orthogonal to axis B and a lateral (cylindrical) edge surface 102 substantially parallel to axis B.
  • Guides 12 comprise, in particular (see Figure 2 ): one or more first guides 12' extending, at least along tract P1 of conveying path P, parallel to shaft 9 and operatively active on the lateral edge surface 102 of closures 100; and one or more second guides 12" cooperating with the top surface 101 of closures 100.
  • the lateral edge surface 101 of closures 100 rest on the one or more first guides 12' which substantially define, with shaft 9, a rail along which closures 100 may be advanced.
  • closures 100 are substantially guided between pairs of second guides 12" arranged on opposite sides of closures 100 (i.e. facing top and bottom sides of closures 100, respectively) or between one or more second guides 12", on one side, and an opposite supporting wall, as will become apparent in the following.
  • closures 100 may therefore roll by gravity along the sections of guides 12' where there is no cooperation of closures 100 with helical coil 8.
  • Sterilising unit 1 further comprises an outer casing 16 adapted to house guiding means 4 and conveying means 7.
  • casing 16 comprises a shell portion 17 and a cover portion 18, the shell portion being adapted to materially house guides 12, helical coil 8 and shaft 9, and motor means 10.
  • outer casing 16 comprises an input channel 19, a central body 20, and an output channel 21, conveying means 7 and a section of the guiding means 4 being housed within central body 20.
  • Central body 20 has at least a first service window 22 positioned in the location of the closure treatment (i.e. sterilisation) station 2 to enable treatment of the closures 100 travelling along path P as defined by the section of guiding means 4 housed within central body 20.
  • the closure treatment i.e. sterilisation
  • central body 20 further comprises a second service window 23 positioned opposite first service window 22, so that closures 100 conveyed along path P by helical coil 8 can be conveniently treated from both sides.
  • Input channel 19 typically communicates with the loading means or closure storage unit (not illustrated) for storing and feeding the closures to be treated.
  • sterilisation unit 1 comprises one or more sources 24,24' of ionising radiation, for example emitters of electron beams or gamma or beta rays, each arranged at a relative service window 22,23, positioned opposite each other, the conveying path P along which closures are advanced extending between them.
  • sources 24,24' of ionising radiation for example emitters of electron beams or gamma or beta rays, each arranged at a relative service window 22,23, positioned opposite each other, the conveying path P along which closures are advanced extending between them.
  • guiding means and conveying means are interposed between said pair of emitters 24, 24', which irradiate closures 100 through the respective windows 22,23 (only one of which is visible in the drawings) of central body 20 of outer casing 16. Accordingly, closures 100 may advantageously be treated on both their top and bottom sides.
  • helical coil 8 is hollow (see the detail of Figure 3 ) and can advantageously be flown through by a flow of a thermal carrier (e.g. cooling) fluid, like water.
  • a thermal carrier e.g. cooling
  • a suitable inlet and outlet for the cooling fluid may advantageously be provided at the ends of helical coil 8, e.g. at the shaft end mount portions.
  • an electron beam emitter like other sources of ionising radiations typically employed for sterilisation purposes, releases heat (e.g. thermal powers of about 500 W are common in the field). Accordingly, ablation of the heat released at the at least one treatment station 2 is desirable, both with a view to preventing any superheating of sterilisation unit 1 as a whole and - even more importantly so - to maintaining the temperature of helical coil 8 within a predetermined range, so that thermal expansion does not alter its geometry.
  • thermal deformation of helical coil 8 might result in operational anomalies, what with alterations of the pitch between adjacent convolutions of the coil making cooperation with closures 100 imprecise, not properly functional or even altogether impossible.
  • Number 1.1 in Figure 4 indicates as a whole an alternative embodiment of a sterilising unit in accordance with the present invention.
  • Sterilising unit 1.1 is similar to sterilising unit 1 and is described below only insofar as it differs from the latter, and using, wherever possible, the same reference numbers for identical or corresponding parts of sterilising units 1 and 1.1.
  • sterilising unit 1.1 differs from sterilising unit 1 in that it comprises (see also the detail in Figure 5 ) a plurality of strengthening guide elements 31.1 extending parallel to axis H and substantially tangential to the convolutions of helical coil 8.
  • strengthening guide elements 31.1 are equally spaced about axis H.
  • three strengthening guide elements 31.1 are provided at 120° off one another.
  • strengthening guide elements 31.1 extend along only part of helical coil 8, however they might run parallel to helical coil 8 along the whole of its length.
  • sterilising unit 1.1 further comprises a rotating shielding portion 32.1 kinematically coupled with helical coil 8 and extending coaxially to helical coil 8 at one end thereof.
  • Helical coil 8 and the convolutions thereof shall be designed and arranged, relative to guides 12 so that strengthening guide elements 31.1 do not hinder proper interaction between the convolutions of helical coil 8 and closures 100.
  • Strengthening guide elements 31.1 help preventing helical coil 8 from deflecting or undergoing deformations due to thermal expansion, thereby preserving optimal functionality of helical coil 8 itself.
  • Closures 100 picked up from the loading means or a closure storage unit slide along the section of the guides 12 arranged within input channel 19, forming a single file along path P (see in particular Figure 1 ).
  • Helical coil 8 is rotated by motor means 10 about shaft 9, the convolutions of helical coil 8 and guides 12 cooperating with closures 100 to produce a forward movement of closures 100 along tract P1 of conveying path P.
  • Helical coil 8 thereby imparts a uniform velocity along tract P1 to all closures 100 reaching tract P1 and conveys them across the at least one service window 22, where closures 100 are conveniently exposed to the action of source 24 of sterilising means (electron beam emitter or the like).
  • source 24 of sterilising means electrospray emitter or the like.
  • closures 100 are maintained evenly spaced from one another as they advance along tract P1 of conveying path P.
  • the convolutions of helical coil 8 contact closures 100 substantially at a single point on their periphery. Therefore, friction and the possible consequent local formation of powder or dust are advantageously greatly reduced.
  • closures 100 are separated from one another by a respective convolution of helical coil 8 and loosely cooperate with adjacent convolutions of helical coil 8 and with guides 12, a rolling movement of closures 100 (i.e. rotation about their axis B) is induced, as they advance towards output channel 21. As a consequence of said rolling movement, the formation of shadow zones may very advantageously be prevented.
  • the speed at which closures 100 advance along tract P1 of conveying path P is conveniently and uniformly controlled by controlling solely the rotation speed of shaft 9, independent of inclination of guides 12 and of the characteristics of the closure material (e.g. friction coefficient, density and so on).
  • a cooling fluid such as water, may be directed to flow within helical coil 8 for removing any excess heat generating by the sources 24 of ionising means.
  • sterilising unit 1 prevents the formation of shadow zones between closures 100, whereby a complete and safe sterilisation treatment of the closures is made possible. Furthermore, by controlling solely the speed of rotation of conveying means 7 (helical coil 8) it is possible to have the closures advance along path P evenly spaced by a predetermined pitch and at a uniform given speed. Accordingly, all closures may uniformly be exposed to the source 24 of sterilisation means for the same treatment time and under substantially equivalent treatment conditions. In particular, the duration of the treatment may be conveniently adjusted in use. Furthermore, since the speed at which closures 100 are advanced along tract P1 of conveying path P, i.e.
  • tract P1 might even be arranged horizontally or vertically.
  • the sterilisation unit of the invention makes it possible to adjust the speed at which closures are advanced along path P on the basis of plant productivity requirements, e.g. as a function of the number of bottles capped per hour.
  • the sterilising unit of the invention can operate with closures of different materials without requiring that parameters such as the speed of rotation of helical coil 8 be adjusted from time to time, since properties such as the friction coefficient between closures 100 and guides 12 has no influence on the time of exposure to the sources 24 of sterilisation means.
  • replacement of helical coil 8 with a modified coil adapted to cooperate with smaller/larger closures would be enough to make sterilisation unit 1 functionally operable with closures 100 of a different size.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Sealing Of Jars (AREA)
EP12717768.1A 2011-05-02 2012-05-02 Container closure sterilising unit Not-in-force EP2704979B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20110383 ITTO20110383A1 (it) 2011-05-02 2011-05-02 Unita' di sterilizzazione di chiusure di contenitori
PCT/EP2012/058052 WO2012150272A1 (en) 2011-05-02 2012-05-02 Container closure sterilising unit

Publications (2)

Publication Number Publication Date
EP2704979A1 EP2704979A1 (en) 2014-03-12
EP2704979B1 true EP2704979B1 (en) 2016-09-14

Family

ID=44317720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12717768.1A Not-in-force EP2704979B1 (en) 2011-05-02 2012-05-02 Container closure sterilising unit

Country Status (6)

Country Link
US (1) US20140124681A1 (ja)
EP (1) EP2704979B1 (ja)
JP (1) JP2014517793A (ja)
CN (1) CN103717523B (ja)
IT (1) ITTO20110383A1 (ja)
WO (1) WO2012150272A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20130017A1 (it) * 2013-03-11 2014-09-12 Gea Procomac Spa Apparato di trattamento di chiusure per contenitori mediante una sostanza sterilizzante
FR3037247B1 (fr) * 2015-06-15 2020-10-23 Serac Group Installation de sterilisation d'articles par rayonnement
CN109896088B (zh) * 2019-03-15 2023-05-05 江苏新美星包装机械股份有限公司 一种电子束空瓶杀菌装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5552044A (en) * 1991-07-15 1996-09-03 Abel; Gunther Apparatus for separating solid material and liquid
JPH05162838A (ja) * 1991-12-18 1993-06-29 Uehara Jushi Kogyo Kk 搬送装置
US5355991A (en) * 1992-05-05 1994-10-18 Campbell Soup Co. Container toppling system
JPH10120143A (ja) * 1996-10-18 1998-05-12 Rozai Kogyo Kaisha Ltd 円筒容器の処理搬送装置
DE29708145U1 (de) * 1997-05-07 1997-12-04 Kronseder Maschf Krones Vorrichtung zum Reinigen und/oder Sterilisieren von Verschlußkappen für Flaschen o.dgl.
US6191424B1 (en) * 1998-12-03 2001-02-20 I-Ax Technologies Irradiation apparatus for production line use
US7322170B2 (en) * 2004-09-02 2008-01-29 Mediatech, Inc. Apparatus and method of sterile filling of containers
US20080061004A1 (en) * 2004-10-29 2008-03-13 Loran Balvanz Method and apparatus for producing dried distillers grain
CN102026905A (zh) * 2008-05-16 2011-04-20 Gea普洛克玛柯股份公司 用于馈送容器闭合件的馈送装置
US8291680B2 (en) * 2008-12-23 2012-10-23 Sidel S.P.A. Apparatus and method for processing container closures
DE102009008138A1 (de) * 2009-02-09 2010-08-19 Khs Ag Transportsystem für Flaschen oder dergleichen Behälter
DE102009052289A1 (de) * 2009-11-09 2011-05-12 Krones Ag Vorrichtung und Verfahren zum Etikettieren befüllter Behältnisse

Also Published As

Publication number Publication date
CN103717523A (zh) 2014-04-09
WO2012150272A1 (en) 2012-11-08
US20140124681A1 (en) 2014-05-08
CN103717523B (zh) 2016-11-02
EP2704979A1 (en) 2014-03-12
JP2014517793A (ja) 2014-07-24
ITTO20110383A1 (it) 2012-11-03

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