EP0641718B1 - Method and device for producing a tubular article having a circumferential accumulation of material - Google Patents

Method and device for producing a tubular article having a circumferential accumulation of material Download PDF

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Publication number
EP0641718B1
EP0641718B1 EP94850148A EP94850148A EP0641718B1 EP 0641718 B1 EP0641718 B1 EP 0641718B1 EP 94850148 A EP94850148 A EP 94850148A EP 94850148 A EP94850148 A EP 94850148A EP 0641718 B1 EP0641718 B1 EP 0641718B1
Authority
EP
European Patent Office
Prior art keywords
accumulation
annular element
tubular article
article
ring
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.)
Expired - Lifetime
Application number
EP94850148A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0641718A1 (en
Inventor
Carsten Pedersen
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.)
Medicopack AS
Original Assignee
PLM AB
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 PLM AB filed Critical PLM AB
Publication of EP0641718A1 publication Critical patent/EP0641718A1/en
Application granted granted Critical
Publication of EP0641718B1 publication Critical patent/EP0641718B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/023—Neck construction
    • B65D1/0246—Closure retaining means, e.g. beads, screw-threads

Definitions

  • the present invention relates to a method and a device for producing a tubular article having a circumferential accumulation of material.
  • Plastic articles of this type are generally produced by conventional techniques, such as extrusion blowing, starting from an extruded hose which is finally shaped in a special tool. Providing, in connection with such shaping, accumulations of material of the aforementioned type is very difficult, since the wall thickness of the extruded hose must be varied.
  • the hose should be thick where a large wall thickness, i.e. accumulation of material, is desired, but thin where a small wall thickness is desired.
  • a thin-walled blank is produced in a first step, and is moved on to another moulding machine where, in a second step, an accumulation of material is applied by injection-moulding in the desired place on the thin-walled blank.
  • This method has been applied e.g. in the making of infusion liquid containers whose filling neck should have a connecting portion with accumulated material, into which a rubber stopper is pressed and which is sealed by an aluminium cap.
  • This method is however slow and costly, in that it comprises several operations which must be performed in different machines. Besides, narrow tolerance requirements are placed on the extruded blank, which are difficult to comply with and which sometimes lead to considerable scrapping.
  • One object of the present invention therefore is, while overcoming the above-mentioned drawbacks, to provide a new method by means of which a tubular, thin-walled article is provided with a circumferential accumulation of material in a less complicated and less expensive way than has hitherto been possible with existing methods.
  • Another object of the invention is to provide a device for carrying out the method.
  • a specific object is to apply the accumulation of material purely mechanically on a preformed, tubular blank having a thin wall.
  • the tubular article is thus formed with first engagement means for engaging corresponding second engagement means on a separate ring, which is passed over or into the article to the position where the accumulation of material is to be provided until the engagement means are brought into permanent engagement with each other, so that axial displacement of the ring is prevented and the accumulation of material is formed.
  • Fig. 1 is a part-sectional view showing a container having an accumulation of material provided in accordance with the invention.
  • Fig. 2 shows equipment used for providing the accumulation of material on the container of Fig. 1.
  • Figs 3-5 are part-sectional views showing different variants of the engagement between an external ring and a neck portion of a container, on which the accumulation of material is to be provided.
  • Fig. 6 which is similar to Fig. 1, shows a container where the accumulation of material is formed with an external thread.
  • Fig. 7 is a cross-section taken along line VII-VII in Fig. 6.
  • Figs 8-9 are part-sectional views showing two variants of the engagement between an internal ring and a neck portion of a container, on which the accumulation of material is to be provided.
  • Fig. 10 is a part-sectional view showing a bellows which is provided at each end with an accumulation of material according to the invention.
  • the container 1 has a cylindrical body 2, a tubular neck portion 3 and an opening 4.
  • a circumferential accumulation of material is formed at the opening 4 by the ring 5 and the section of the wall of the neck portion 3 where the ring 5 is applied.
  • the accumulation of material should form a strong stiffening flange for receiving a snap-action cover or the like.
  • the method and the device according to the first aspect of the invention appear from Fig. 2.
  • the thin-walled container 1 is manufactured in known manner by some conventional method, e.g. extrusion blowing, a circumferential groove 6 being formed in the neck portion 3.
  • the neck portion 3 has the diameter D 1 .
  • the inner portion 8 of the ring 5 (Fig. 1) thus forms first engagement means for cooperatively engaging corresponding second engagement means in the form of the groove 6 in the neck portion 3.
  • These cooperating engagement means 6, 8 are thus brought into permanent engagement with each other, so that axial displacement of the ring 5 is prevented and so that an accumulation of material is formed by the ring 5 and the adjoining wall section of the neck portion 3 at the groove 6.
  • the container 1 is produced in known manner, but is formed with the groove 6, in which the ring 5 is subsequently brought into engagement by a simple operation and by simple equipment.
  • Figs 3-5 show different alternatives of the engagement between the ring and the groove in the neck portion 3.
  • the external ring 5a has square cross-section, like the groove 6a in the neck portion 3.
  • Other polygonal cross-sections are of course conceivable.
  • the ring 5b has on its inside a circumferential bead 9 for engaging a mating external groove 6b in the neck portion 3.
  • the ring 5c has a circumferential groove 10 for engaging a mating external bead 6c in the neck portion 3.
  • a container 11 which is similar to the container in Fig. 1 with the exception of the ring 5d having an external engagement means, here shown as a screw fitting or thread 12, for a closure device, for instance a cap, a cover or the like (not shown).
  • the engagement means may also be of the snap-action type.
  • the container 11 has in its neck portion external engagement means, here in the form of axial ridges 13, to prevent rotation of the ring 5d applied on the neck portion.
  • the ridges 13 engage mating recesses in the ring 5d.
  • the neck portion has a wall thickness which is considerably smaller than the thickness of the ring 5d in the central plane thereof.
  • the thickness ratio preferably is from 1:10 up to 1:3.
  • Figs 8 and 9 show a second aspect of the invention in which the ring 5e and 5f, respectively is applied on the inside of the neck portion 3, here being in the form of a collar.
  • the accumulation of material is provided as before by means of the ring 5e or 5f and the adjoining wall section of the neck portion 3.
  • the outside of the ring 5e or 5f forms engagement means for engaging corresponding engagement means in the form of a circumferential groove in the neck portion 3 in a manner similar to that described above.
  • the rings 5e and 5f are brought into their positions of engagement either by compressing the ring or by slightly expanding the neck portion in the area of the opening.
  • the rings 5e and 5f can be provided with internal engagement means, e.g. a thread for a screw plug or similar closure device (not shown). Moreover, cooperating engagement means (not shown) can be arranged on the outside of the ring 5e or 5f and the inside of the neck portion 3 to prevent rotation of the ring.
  • internal engagement means e.g. a thread for a screw plug or similar closure device (not shown).
  • cooperating engagement means can be arranged on the outside of the ring 5e or 5f and the inside of the neck portion 3 to prevent rotation of the ring.
  • the desired locking engagement for providing the accumulation of material can be brought about, for example in the following way.
  • the ring In those cases where the ring is to be expanded or compressed, it consists of an elastic plastics material, e.g. polyolefin. When the ring is not to be deformed, it preferably consists of a relatively hard plastics material, e.g. polystyrene.
  • the ring is suitably injection-moulded in a multiple tool.
  • Fig. 10 shows an article in the form of a thin-walled bellows 18 which is provided at each end with an accumulation of material 19 and 20 according to the invention.
  • the accumulations of material 19, 20 form connections for pipe conduits, hoses or the like (not shown).
  • the article to which the invention is applied may consist of different materials.
  • the container shown in Fig. 2 might for example have a body of metal and a neck portion of plastics and vice versa.
  • the invention is by no means restricted to the embodiments described in the foregoing, but several modifications thereof are conceivable within the scope of the inventive concept as defined in the appended claims.
  • the invention can be used in many different instances where it is desirable to provide an accumulation of material on a tubular plastic article.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Manipulator (AREA)
  • Making Paper Articles (AREA)
  • Container Filling Or Packaging Operations (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
  • Fish Paste Products (AREA)
EP94850148A 1993-09-03 1994-09-02 Method and device for producing a tubular article having a circumferential accumulation of material Expired - Lifetime EP0641718B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9302844A SE508018C2 (sv) 1993-09-03 1993-09-03 Sätt och anordning för framställning av en rörformig behållare med en runtomgående godsansamling samt behållare framställd genom sättet
SE9302844 1993-09-03

Publications (2)

Publication Number Publication Date
EP0641718A1 EP0641718A1 (en) 1995-03-08
EP0641718B1 true EP0641718B1 (en) 1998-06-03

Family

ID=20390966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94850148A Expired - Lifetime EP0641718B1 (en) 1993-09-03 1994-09-02 Method and device for producing a tubular article having a circumferential accumulation of material

Country Status (7)

Country Link
EP (1) EP0641718B1 (no)
AT (1) ATE166843T1 (no)
DE (1) DE69410717T2 (no)
DK (1) DK0641718T3 (no)
ES (1) ES2116569T3 (no)
NO (1) NO306335B1 (no)
SE (1) SE508018C2 (no)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040166263A1 (en) * 2003-02-26 2004-08-26 Nahill Thomas E. Container preform assembly and method of manufacture
US6811845B2 (en) * 2003-02-26 2004-11-02 Continental Pet Technologies, Inc. Container preform assembly and method of manufacture
US20050139569A1 (en) * 2003-12-24 2005-06-30 Larsen W. B. Swage-forming of container or preform internal threads
US20060073293A1 (en) * 2004-10-04 2006-04-06 Nahill Thomas E Finish assembly, preform assembly, container assembly, and method of manufacture
EP1752066B1 (de) * 2005-08-11 2009-03-11 Geka Brush Gmbh Bürstchen zum Auftragen kosmetischer Massen
CH703187A1 (de) * 2010-05-27 2011-11-30 Bottletec Gmbh Behälter mit Verschlussgewinde.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1304193A (en) * 1919-05-20 Wjtttai
FR1319686A (fr) * 1962-04-12 1963-03-01 Braher Soc Récipients flexibles à col rigide permettant l'usage d'un bouchon-couronne
US3828418A (en) * 1972-11-06 1974-08-13 American Flange & Mfg Closure combination and method
DE9200027U1 (no) * 1992-01-03 1993-06-17 Tubex Gmbh Tuben- Und Metallwarenfabrik, 7456 Rangendingen, De

Also Published As

Publication number Publication date
SE9302844L (sv) 1995-03-04
NO306335B1 (no) 1999-10-25
EP0641718A1 (en) 1995-03-08
DK0641718T3 (da) 1998-10-12
NO943254L (no) 1995-03-06
SE9302844D0 (sv) 1993-09-03
DE69410717T2 (de) 1998-10-08
DE69410717D1 (de) 1998-07-09
NO943254D0 (no) 1994-09-02
SE508018C2 (sv) 1998-08-10
ATE166843T1 (de) 1998-06-15
ES2116569T3 (es) 1998-07-16

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