EP0533633A2 - Vorrichtung und Verfahren zum Formen von Schwächungseinschnitten, insbesondere auf Behälterkappen - Google Patents

Vorrichtung und Verfahren zum Formen von Schwächungseinschnitten, insbesondere auf Behälterkappen Download PDF

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Publication number
EP0533633A2
EP0533633A2 EP92830481A EP92830481A EP0533633A2 EP 0533633 A2 EP0533633 A2 EP 0533633A2 EP 92830481 A EP92830481 A EP 92830481A EP 92830481 A EP92830481 A EP 92830481A EP 0533633 A2 EP0533633 A2 EP 0533633A2
Authority
EP
European Patent Office
Prior art keywords
cap
support surface
ring
side skirt
fact
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
EP92830481A
Other languages
English (en)
French (fr)
Other versions
EP0533633B1 (de
EP0533633A3 (en
Inventor
Franco Iacoboni
Oliviero Zanardo
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.)
CMB ITALCAPS TECHNOLOGY Srl
Original Assignee
CMB ITALCAPS TECHNOLOGY Srl
Italcaps 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 CMB ITALCAPS TECHNOLOGY Srl, Italcaps SpA filed Critical CMB ITALCAPS TECHNOLOGY Srl
Publication of EP0533633A2 publication Critical patent/EP0533633A2/de
Publication of EP0533633A3 publication Critical patent/EP0533633A3/en
Application granted granted Critical
Publication of EP0533633B1 publication Critical patent/EP0533633B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/0015—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes
    • B26F1/0053—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes by machining, e.g. cutting, grinding, projections on the tube wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F2210/00—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products
    • B26F2210/04—Making plastic pilferproof screw caps by cutting a tamper ring

Definitions

  • the present invention relates to a machine intended for mechanically and automatically making highly accurate weakening cuts, particularly on plastics caps for containers such as bottles or the like. Weakening cuts of this kind serve for example for delimiting the zone constituting a tamper-proof band which is intended to be separated from the cap when the package is opened.
  • a composite tamper-proof closure cap which has a moulded plastics side skirt part provided with a screw thread or other means for fastening the cap to the container.
  • a peripheral ring of reduced thickness is provided, in which is formed a tamper-proof band serving to make immediately visible any tampering with the package to which the cap has been applied, before the actual authorised opening of said package.
  • the tamper-proof band is fixed to the plastics side skirt by means of breakable bridges and is provided with a continuous flap turned over towards the interior of the cap and intended to engage a projection formed on the neck of the container, so that, when the cap is unscrewed, the breakable bridges are torn away and the tamper-proof band is separated from the side skirt of the cap.
  • a first method used hitherto for forming the weakening zone between the side skirt and the tamper-proof band consists in forming, during the process of moulding the cap, numerous bridges fastened to and connecting together the two parts of the cap. These bridges are separated from one another by generally rectangular gaps and are equally spaced over the circumference of the side skirt.
  • a second method consists in forming, during the process of moulding the cap, numerous protuberances on the inside wall of the side skirt so as to produce an increased wall thickness, since said protuberances extend radially towards the interior of the remaining part of the side skirt.
  • a continuous circumferential cut of constant depth is then made in the cross-section of the skirt, cutting through the side skirt but leaving intact the protuberances previously formed.
  • the intact protuberances thus form bridges between the side skirt in the upper part and the tamper-proof band in the lower part, said band thus being formed by circumferentially cutting through the ring of reduced thickness of the side skirt.
  • the inaccuracy is inherent to the method of moulding the plastics material, which does not make it possible to form equally spaced bridges of equal thickness in a simple and economical manner.
  • the operation of making the circumferential cut can be carried out with greater precision in an adequately economical manner; nevertheless, the inaccuracy and tolerances in the thickness of the parts moulded at high speed do not permit high precision in the formation of the bridges, in view of the fact that the protuberances are sometimes too thin to produce sufficiently strong bridges or are simply cut right through. On the other hand, the thickness of the side skirt is sometimes too great and the cut is therefore not sufficiently deep to form separate bridges.
  • the main object of the present invention is therefore that of providing an improved cap which between the side skirt and the tamper-proof band has a weakening zone which is made with great accuracy both in respect of the distance between the bridges and in respect of their thickness.
  • Another object of the present invention is that of producing a cap of this kind with the aid of a simple and economical machine which utilises a method of making highly accurate weakening cuts.
  • a machine for making weakening cuts on caps of the kind indicated is characterised by the fact that it comprises in combination: a support surface intended for the ring and provided with cutting teeth generally at right angles to said surface, which are aligned and separated from one another by gaps, and a device which holds the cap ring in forced contact with the support surface and at the same time brings about a reciprocal rolling movement, without slipping, of the cap, relative to the surface, in the direction of alignment of the cutting teeth, the arrangement being such that the breakable bridges which remain in place on the ring, in positions corresponding to the gaps, are located along a circumference lying in a plane at right angles to the axis of the cap.
  • a method of making weakening cuts on caps of the kind indicated comprises the operations of: providing for the ring a support surface equipped with cutting teeth generally at right angles to said surface, which are aligned and separated by gaps; and causing the side skirt of a cap to roll, in a reciprocal relative movement without slipping, in forced contact with the support surface, in such a manner that the cutting teeth penetrate into said side skirt along a circumference lying in a plane at right angles to the axis of the cap, the arrangement being such that, at the end of one complete rotation about the side skirt of the cap, in positions corresponding to the gaps between the cutting teeth, numerous bridges remain in place on the side skirt of the cap, their number being equal to the number of the gaps, said bridges separably connecting the side skirt to the tamper-proof band.
  • the principal advantage obtained with the machine according to the present invention therefore consists in the considerable accuracy in the making of the cuts, both as regards their height and as regards their length, even when there are substantial differences in the thickness of the ring of the side skirt of the cap, because of the complete absence of relative slipping between the cutting elements and the cap.
  • Another advantage consists in the constancy and repeatability of the cuts in the presence of variable thicknesses of the plastics material along the entire circumference of the cap.
  • Yet another advantage consists in the fact that along the weakening line formed by the present machine there are no missing bridges and no zones where cuts have not been made.
  • the present machine for making weakening cuts on container caps comprises a main plate 10 fastened to the main frame of the machine and immovable relative to said main frame.
  • a main shaft 12 is also fastened to the machine frame and to the main plate 10, and a planet wheel carrier disc 14 (see Figure 2), driven by a mechanical drive device (not shown), rotates about said shaft.
  • the planet wheel carrier disc 14 supports rotatably numerous planet wheels 16, which are sixteen in number in the embodiment illustrated in the drawings, although this number can be increased or reduced in accordance with requirements dictated by the size of the machine.
  • each planet wheel 16 carries gear teeth 20 meshing with the gear teeth 18 on the main plate 10. In this way the planet wheels 16 are turned about their axis when the planet wheel carrier disc 14 turns about the main shaft 12.
  • the present machine also includes a cap admission station 22, a cutting station 24, and a station 26 for the discharge of said caps.
  • the caps 28 are continuously fed to the admission station 22 by means of a chute 30, at the end of which they wait to be picked up by the head of the planet wheels 16 during the rotation, in the clockwise direction with reference to Figure 1, of the planet wheel carrier disc 14 and thus to be carried through the cutting station 24 where, as will be more fully described further on, the profiled cut forming the tamper-proof band is made.
  • the caps 28 After passing through the cutting station 24, the caps 28 leave the machine at the discharge station 26, where they are taken off by electromagnetic devices, if they have metallic parts, or by suction devices if they are made of plastics material, or by any other of the many devices which are known to those skilled in the art and are suitable for the purpose.
  • the cutting station 24 has a blade carrier device 32 provided, at the inlet zone of the cutting station 24, with an inclined approach surface 34 and, in the central zone of the cutting station 24, with a blade 36 intended for making the actual cut, as will be more fully described further on.
  • the blade carrier device 32 is of sandwich construction and receives in its interior the actual blade 36, together with electrical resistors 38 for heating said blade in order to obtain a better cut.
  • the blade 36 On its side facing the cap 28 (see Figure 4) the blade 36 is so shaped as to have a top surface 40 having a cylindrical conformation intended to form a support for the cap ring during the cutting operation, while at the bottom said blade is provided with numerous cutting teeth 42 in alignment with one another along the blade 36. As can be better seen in Figure 3, the cutting teeth 42 are separated from one another by gaps 44.
  • each planet wheel 16 has a baseplate 46, on which the cap 28 is supported during the cutting operation, and also a cylindrical body 48 which holds the cap 28 against the blade 36 during the cutting operation. Above the cylindrical body 48 each planet wheel 16 ends in a frustoconical head 50 intended to facilitate the picking-up of the cap 28 in the admission station 22 and its positioning on the planet wheel 16.
  • a hood 52 fastened to the main plate 10 contributes towards the vertical positioning of the caps 28.
  • the cylindrical body 48 of the planet wheel 16 is provided with vertical channels forming a rack and has a groove 54 in line with the cutting teeth 42 and a groove 56 in which a fastening flap 58 of the tamper-proof band of the cap 28 is received during the cutting operation, in order to avoid damage to it.
  • the cap 28, which is shown in Figure 4 in the position which it occupies while the cut is being made, comprises itself in known manner a side skirt 60, which in its interior is provided with screw threads or other engaging means intended to match similar engaging means formed on the neck of the container.
  • the cap 28 also comprises a disc-like top part 62, generally made of metal but sometimes also of plastics material, which is intended to close the mouth of the container in conjunction with a sealing ring 64.
  • the bottom part of the side skirt 60 of the cap 28 ends in a ring 66 of reduced thickness, which is provided with the previously mentioned fastening flap 58 and is intended to form the tamper-proof band after the operation of making the weakening cut with the aid of the present machine.
  • each planet wheel 16 turns about its own axis in the clockwise direction, referring to Figure 1, because of the coupling of the gear teeth 20 thereof to the gear teeth 18 attached to the main plate 10.
  • the cap 28 is positioned by the action of centrifugal force and by the action of the approach surface 34, so as to remain held by an interference fit between the cylindrical support surface 40 of the blade 36 and the channelled surface of the cylindrical body 48 of the planet wheel 16.
  • the generatrix of the gear teeth 18 corresponds to the cylinder to which the cylindrical support surface 40 corresponds, and since the presence of the rack-like channels on the cylindrical body 48 and their interference fit with the plastic material of the cap 28 prevent slipping between the cap 28 and the cylindrical body 48 of the planet wheel 16, the effect is that the cap 28 is made to roll on the cylindrical support surface 40 without any possibility of slipping.
  • the cap 28 After the cap 28 has made a complete revolution about its own axis, rolling without slipping on the cylindrical support surface 40 of the blade 36, the cap encounters on the blade 36 a zone devoid of cutting teeth and at the end the planet wheel 16 reaches the discharge station 26, where the cap 28 is taken off from the present machine, as already stated, to be passed on for further processing.
  • a method which consists essentially of the operations of: providing for the cap ring 66 a support surface 40 equipped with cutting teeth 42 generally at right angles to said surface, which are aligned and separated by gaps 44; and causing the side skirt 60 of a cap 28 to roll, in a reciprocal relative movement without slipping, in forced contact with the support surface 40, in such a manner that the cutting teeth 42 penetrate into said side skirt along a circumference lying in a plane at right angles to the axis of the cap, the arrangement being such that, at the end of one complete rotation about the side skirt of the cap, in positions corresponding to the gaps 44 between the cutting teeth 42, numerous bridges remain in place on the side skirt 60 of the cap 28, their number being equal to the number of the gaps 44, said bridges separably connecting the side skirt to the tamper-proof band.
  • the present machine Since caps of various diameters are produced, it is desirable that the present machine should be easily adaptable to operate with caps of different diameters. For this purpose, with the present machine it is only necessary to change the blade 36 as a whole, replacing it with a new blade having a number of cutting teeth 42 and gaps 44 appropriate for the new diameter of the cap with which it is desired to operate. It is in fact obvious that the length of the portion provided with teeth 42 on the blade 36 must always correspond to the outside circumference of the cap on which the cut is to be made, in order to avoid superimposed cuts.
  • the number of gaps 44 must correspond to the desired number of bridges, and this in turn will depend on the diameter of the cap being processed.
  • the support surface 40 for the ring 66 need not necessarily correspond to a cylinder; it may have any shape, even a plane shape, because its only purpose is to provide support for the cap ring 66 during the cutting operation.
  • the rack-like channelling may be replaced by any similar expedient producing corrugations on the surface of the various members in order to assist engagement and prevent the slipping of the cap, while it is also obvious that an expedient of this kind can be dispensed with if the friction between the plastics material, or other material of which the cap is made, and the materials of which the blade 36 and the cylindrical body 48 of the planet wheel 16 are made is sufficient to prevent slipping between the surfaces coupled together by force.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Closing Of Containers (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
EP92830481A 1991-09-19 1992-09-15 Vorrichtung und Verfahren zum Formen von Schwächungseinschnitten, insbesondere auf Behälterkappen Expired - Lifetime EP0533633B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM910703A IT1250101B (it) 1991-09-19 1991-09-19 Apparecchiatura e procedimento per eseguire tagli di indebolimento,in particolare su capsule per contenitori.
ITRM910703 1991-09-19

Publications (3)

Publication Number Publication Date
EP0533633A2 true EP0533633A2 (de) 1993-03-24
EP0533633A3 EP0533633A3 (en) 1993-08-18
EP0533633B1 EP0533633B1 (de) 1996-10-30

Family

ID=11400364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92830481A Expired - Lifetime EP0533633B1 (de) 1991-09-19 1992-09-15 Vorrichtung und Verfahren zum Formen von Schwächungseinschnitten, insbesondere auf Behälterkappen

Country Status (8)

Country Link
EP (1) EP0533633B1 (de)
AT (1) ATE144738T1 (de)
DE (1) DE69214907T2 (de)
DK (1) DK0533633T3 (de)
ES (1) ES2095449T3 (de)
GR (1) GR3022352T3 (de)
IT (1) IT1250101B (de)
ZA (1) ZA926999B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0621114A1 (de) * 1993-04-19 1994-10-26 Owens-Illinois Closure Inc. Garantieverschluss sowie Verfahren und Vorrichtung zur Herstellung desselben
WO1995024299A1 (en) * 1994-03-08 1995-09-14 H-C Industries, Inc. Method and apparatus for scoring a tamper-indicating plastic closure
WO1996011856A1 (en) * 1994-10-12 1996-04-25 Carnaudmetalbox Plc Closures for containers
EP1243520A1 (de) * 2001-03-19 2002-09-25 Oberburg Engineering Ag Verfahren und Vorrichtung zum Bearbeiten einer Verschlusskapsel
WO2004004993A1 (en) * 2002-07-02 2004-01-15 Sacmi Cooperativa Meccanici Imola S.C.R.L. Apparatus for making a fracture cut between the cup and the safety ring in plastic caps
US6817276B1 (en) 1993-04-19 2004-11-16 Owens-Illinois Closure Inc. Apparatus for forming bridges in tamper-indicating closures
CN104070236A (zh) * 2014-06-26 2014-10-01 山东丽鹏股份有限公司 异形铝盖切连点装置
CN111590683A (zh) * 2020-05-01 2020-08-28 张书香 一种塑料水瓶打孔机
WO2020247319A1 (en) 2019-06-04 2020-12-10 Closure Systems International Inc. Method of forming a cut in a polymeric component
EP3800020A1 (de) * 2019-10-03 2021-04-07 PackSys Global AG Vorrichtung und verfahren zum herstellen eines sicherungsrings an einer verschlusskappe für einen behälter
US20220281130A1 (en) * 2019-08-05 2022-09-08 SAMI Cooperativa Meccanici Imola Societa’ Cooperativa Apparatus for cutting caps

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393736A1 (fr) * 1977-06-10 1979-01-05 Lindner Ind Perfectionnements a un dispositif et un procede de fermeture d'une bouteille
EP0228618A2 (de) * 1985-12-19 1987-07-15 Pharma-Gummi Wimmer West GmbH Orginalitätssichernder Behälterverschluss

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393736A1 (fr) * 1977-06-10 1979-01-05 Lindner Ind Perfectionnements a un dispositif et un procede de fermeture d'une bouteille
EP0228618A2 (de) * 1985-12-19 1987-07-15 Pharma-Gummi Wimmer West GmbH Orginalitätssichernder Behälterverschluss

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0621114A1 (de) * 1993-04-19 1994-10-26 Owens-Illinois Closure Inc. Garantieverschluss sowie Verfahren und Vorrichtung zur Herstellung desselben
US7059232B2 (en) 1993-04-19 2006-06-13 Owens-Illinois Closure Inc. Method of forming bridges in tamper-indicating closures
US6817276B1 (en) 1993-04-19 2004-11-16 Owens-Illinois Closure Inc. Apparatus for forming bridges in tamper-indicating closures
WO1995024299A1 (en) * 1994-03-08 1995-09-14 H-C Industries, Inc. Method and apparatus for scoring a tamper-indicating plastic closure
CN1056113C (zh) * 1994-10-12 2000-09-06 卡瑙德金属箱有限公司 一种形成薄弱带的方法
US5809860A (en) * 1994-10-12 1998-09-22 Crown Cork & Seal Technologies Corporation Methods for forming lines of weakening in closures
WO1996011856A1 (en) * 1994-10-12 1996-04-25 Carnaudmetalbox Plc Closures for containers
EP1243520A1 (de) * 2001-03-19 2002-09-25 Oberburg Engineering Ag Verfahren und Vorrichtung zum Bearbeiten einer Verschlusskapsel
WO2004004993A1 (en) * 2002-07-02 2004-01-15 Sacmi Cooperativa Meccanici Imola S.C.R.L. Apparatus for making a fracture cut between the cup and the safety ring in plastic caps
CN100354081C (zh) * 2002-07-02 2007-12-12 伊莫拉Sacmi机械合作公司(简称Sacmi伊莫拉S.C.) 用于制造塑性盖中杯和安全环之间断裂切口的设备
US7673543B2 (en) 2002-07-02 2010-03-09 Sacmi Cooperativa Meccanici Imola S.C.R.L. Apparatus for making a fracture cut between the cup and the safety ring in plastic caps
CN104070236A (zh) * 2014-06-26 2014-10-01 山东丽鹏股份有限公司 异形铝盖切连点装置
CN104070236B (zh) * 2014-06-26 2016-06-22 山东丽鹏股份有限公司 异形铝盖切连点装置
WO2020247319A1 (en) 2019-06-04 2020-12-10 Closure Systems International Inc. Method of forming a cut in a polymeric component
US20220281130A1 (en) * 2019-08-05 2022-09-08 SAMI Cooperativa Meccanici Imola Societa’ Cooperativa Apparatus for cutting caps
EP3800020A1 (de) * 2019-10-03 2021-04-07 PackSys Global AG Vorrichtung und verfahren zum herstellen eines sicherungsrings an einer verschlusskappe für einen behälter
WO2021063776A1 (de) * 2019-10-03 2021-04-08 Packsys Global Ag Vorrichtung und verfahren zum herstellen eines sicherungsrings an einer verschlusskappe für einen behälter
CN114746233A (zh) * 2019-10-03 2022-07-12 帕克西斯全球股份公司 用于在容器封盖上制造锁环的设备和方法
CN111590683A (zh) * 2020-05-01 2020-08-28 张书香 一种塑料水瓶打孔机

Also Published As

Publication number Publication date
ITRM910703A1 (it) 1993-03-19
EP0533633B1 (de) 1996-10-30
GR3022352T3 (en) 1997-04-30
IT1250101B (it) 1995-03-30
ES2095449T3 (es) 1997-02-16
ATE144738T1 (de) 1996-11-15
EP0533633A3 (en) 1993-08-18
ZA926999B (en) 1993-05-10
DK0533633T3 (da) 1997-03-24
DE69214907T2 (de) 1997-05-15
ITRM910703A0 (it) 1991-09-19
DE69214907D1 (de) 1996-12-05

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