EP0354137B1 - Procédé de fabrication et de conditionnement d'un distributeur à poche, sous-ensembles et distributeurs correspondants - Google Patents

Procédé de fabrication et de conditionnement d'un distributeur à poche, sous-ensembles et distributeurs correspondants Download PDF

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Publication number
EP0354137B1
EP0354137B1 EP89420269A EP89420269A EP0354137B1 EP 0354137 B1 EP0354137 B1 EP 0354137B1 EP 89420269 A EP89420269 A EP 89420269A EP 89420269 A EP89420269 A EP 89420269A EP 0354137 B1 EP0354137 B1 EP 0354137B1
Authority
EP
European Patent Office
Prior art keywords
dome
skirt
annular
casing
bag
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
EP89420269A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0354137A1 (fr
Inventor
Michel Rebeyrolle
Bernard Schneider
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.)
Albea Tubes France SAS
Original Assignee
Cebal SAS
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
Priority claimed from FR8810228A external-priority patent/FR2634466B1/fr
Priority claimed from FR8817625A external-priority patent/FR2642699B1/fr
Application filed by Cebal SAS filed Critical Cebal SAS
Priority to AT89420269T priority Critical patent/ATE87878T1/de
Publication of EP0354137A1 publication Critical patent/EP0354137A1/fr
Application granted granted Critical
Publication of EP0354137B1 publication Critical patent/EP0354137B1/fr
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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/60—Contents and propellant separated
    • B65D83/62—Contents and propellant separated by membrane, bag, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/026—Membranes separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container

Definitions

  • the invention relates to a pocket dispenser and its manufacturing and packaging method.
  • a pocket dispenser is used for cosmetic, pharmaceutical, hygienic or food products.
  • a pocket dispenser comprising a rigid housing surmounted by a rigid plastic dome, this dome comprising a threaded neck onto which a distribution means is screwed and an annular lower portion comprising an inner lower tube fixed to a sealed flexible bag, this tube forming with an external tube an annular groove allowing the fixing of this dome on the upper end of a housing.
  • the filling of the pocket by the opening of the neck of the dome is followed by a sealed sealing of this opening and of a fixing of the assembly (dome + filled pocket) on a case, for example made of cardboard, by said annular groove. , then a fixing of the distribution means.
  • filling is done from above before fixing the dispensing means.
  • the Applicant has sought to develop a manufacturing process and a dispenser allowing easy assembly and filling operations, as well as improved emptying of the bag at the end of distribution of the product contained.
  • the subject of the invention is a method of manufacturing and packaging a bag dispenser comprising a box surmounted by a plastic dome fixed in a sealed manner on the upper end of said box, a flexible flexible bag fixed in said dome, and distribution means fixed to an upper portion of said dome, in which an annular dome is first produced by molding comprising an annular upper portion allowing the tight fixing of said distribution means and an annular lower portion comprising an annular inner lower tube fixed to said pocket (13) and, surrounding this tubing, an annular groove allowing the fixing of the annular dome on said upper end of the housing, characterized in that instead of fixing a flexible waterproof pocket to the dome, the inner tubing of this dome is fixed to 5 to 20 mm from height a skirt open at its two ends forming the outline of a pocket, either by embedding the upper end of said skirt in said inner lower tube during said molding of said dome, or by gluing said upper end of said skirt around of said inner lower tube, thus obtaining a preassembled part (dome + skirt), the skirt being able to be filled
  • the vertical direction is by convention that of the longitudinal axis of the housing and of the skirt or pocket, and the top of the dispenser or of its constituent parts corresponds to the end of this dispenser carrying the dispensing means.
  • the interior dome tubing is sealed tightly on the upper end of the pocket blank skirt. preferably for large series by molding during the molding of the dome, or by gluing the end of the skirt around said tubing.
  • a portion of the tubular skirt is threaded around a punch so that its upper end exceeds a chosen length of this punch.
  • This skirt is then included between this punch and the die tools which define with this protruding end, with tools inside the punch and with die bottom tools, an annular interval supplied with plastic material, typically by at least two injection channels. lateral or oblique.
  • the annular molding interval thus defined has, in cross section, the profile of the dome part to be produced, and makes it possible to obtain the desired part (dome + skirt) on demolding.
  • the skirt is connected to the dome part of this part by an internal tube which comes to adapt to the mounting in the neck of the housing.
  • the upper end of the skirt embedded in this tubing by molding can thus be: either flush with the interior surface of the tubing, or in the thickness of this tubing and preferably closer to the outer surface of the tubing interior of the dome as of its interior surface, that is, even more advantageously for the surmounting, on the exterior surface of said tube.
  • the sheath which is usually very thin, for example 0.2 to 0.3 mm thick, tends, when used as a pocket, to close at the end of emptying by twisting effect, and this when the steep end of this pocket was welded to the tubing of the dome for only 3 to 4 mm.
  • a second, much better solution is to have, preferably with a slight tightening of the skirt on the tubing, one or more annular recessed zones for glue retention on the surface to be glued on the dome tubing, zones of depth less than 0.15 mm to facilitate demolding of the dome.
  • annular zones at the optimum height or width between 0.5 and 2.5 mm and depth between 0.04 and 0.1 mm, they are advantageously connected to each other by bridges or hollow passages of equal or similar depth so as to improve the distribution of the adhesive when belted by the skirt.
  • annular zones can furthermore, to allow a more convenient and safer bonding, be preceded by an end portion carrying a flexible annular lip inclined upwards serving as a glue reserve, the bottom of this reserve being connected to the nearest hollow annular zone, that is to say the first hollow annular zone starting from the end of the tube, by hollow bridges.
  • a glue reserve serving as a glue reserve
  • the introduction of the skirt around the tubing then tightens this flexible lip by expelling glue towards the recessed annular zone or zones, this glue propagating through said recessed bridges.
  • cyanoacrylate adhesives are particularly suitable for industrial manufacture, the annular dome preferably being for its rigidity, made of polyamide, polyacetal or polycarbonate, and the skirt being at least on the surface.
  • inner PE polyethylene
  • the distribution means then comprise a low or no return air pump provided with an annular fixing flange at least externally made of plastic
  • the direct molding process already described for the part (dome + skirt) is modified in that the annular molding cavity defining the dome comprises the periphery of the annular rim of the pump.
  • the tools containing the pump and protecting it from overheating in the molding are a lower tool with a central cavity surmounted by a flange supporting said flange in leaktight fashion, and a tool at the bottom of the matrix covering the pump and resting on the flange by completing the seal against the molten plastic.
  • the connection obtained between the dome and the rim of the pump is either a weld if the plastics concerned are of the same nature, or a bonding with intimate adhesion, without reflow, ensuring however, as has been verified, a good seal when the materials Plastics are dissimilar, for example polypropylene for the pump ring and PE-HD for the dome.
  • the distribution means comprise a low or no return air pump carrying an annular fixing rim at least externally made of plastic
  • the molding tools are then of the same type as those described for the variant of the second manufacturing range, with the following modifications: there is a double concentric punch allowing the positioning of the skirt of the pocket and the skirt of the metallic tubular body and the release from the mold, and the annular molding cavity surrounds a rolled edge prepared at the upper end of the metallic tubular body , the connection of the dome being at this level produced by filling the inside and outside of this edge.
  • This rolled or folded edge is not closed and can be much less tight than a rolled edge for crimping, which is an advantage of ease of manufacture and flexibility.
  • the complex assembly then obtained is then ready for the packaging operations (d2) to (f2).
  • the invention also relates to a preassembled part for a pocket dispenser, obtainable by the method described above, comprising an annular dome of molded plastic material and a flexible waterproof pocket fixed to said dome, this dome comprising an annular upper portion allowing the sealed fixing of distribution means and an annular lower portion comprising an annular inner lower tube tightly fixed to said pocket as well as, surrounding this tube, an annular groove allowing the dome to be fixed on a housing, characterized in that said flexible pocket watertight is replaced by a skirt open at its lower end and forming the blank of said pocket, and in that said inner lower tube is fixed by molding or by welding on 5 to 20 mm in height from the upper end of said skirt .
  • the annular dome is in polyolefin and the skirt is in complex comprising a barrier layer and surface layers in polyolefin compatible with the polyolefin of the dome and is embedded by molding in said tubing.
  • the invention also relates to a dispenser which can also be obtained by the above method, this dispenser comprising a housing surmounted by an annular dome of molded plastic material which itself comprises an annular upper portion allowing the watertight fixing of means of distribution and an annular inner lower tube tightly fixed to a flexible flexible bag as well as, surrounding this tube, an annular groove, this distributor also comprising a valve or a weak or no return air pump fixed to said annular upper portion and said housing having its upper end fixed to said annular groove, characterized in that said sealed pocket is replaced by a skirt whose lower end is open, is intended to be filled by its lower end, and in that said tubing is fixed by molding or by gluing on 5 to 20mm in height from the upper end of said skirt, and in that said housing is metallic and carries at its upper end a rolled edge, said annular groove being circular and resting on said rolled edge by being tightly fixed thereto.
  • the casing is made of tinplate and comprises a tubular body and a separate bottom, the bottom being to be crimped onto the tubular body after filling of the skirt by its open lower end and tight closure of this end.
  • the upper end 3 of the skirt 4 has been trapped by molding in an inner tube 5 of the dome 2, with an outside diameter of 36.3 mm, over a height of 13 mm, its inner and outer layers therefore being partially recast. and welded and the plastic covering of the dome 2 being 0.8 mm on the outside and 1.5 mm on the inside. This arrangement ensures at the top of the skirt closed in the pocket sufficient rigidity so that the opening of this pocket remains during the last product distributions.
  • the dome part 2 comprises on the outside of its internal tube 5 a semicircular groove 6, of radius 1.5 mm in axial section and of average diameter 42 mm, the outside diameter of the dome 2 being 45 mm.
  • the dome 2 comprises at its upper end an external bulge 7 of external diameter 20 mm allowing the crimping of a cup metallic valve or distribution pump.
  • the part (dome + skirt) 1 was used to manufacture a pocket dispenser 8 (FIG. 2) according to the method of the first manufacturing range.
  • the lower end 9 of the skirt 4 has been closed by arc welding, this end being folded back into a lined semi-circular shape 10 as shown in the diagram in FIG. 4 and pinched to a height of 6 mm by welding.
  • This arrangement gives a welded end 12 of the pocket 13 of curved shape but of the same diameter as the skirt 4 and presenting no difficulty of introduction into the housing 11.
  • the weld 12 has been freed of approximately 2 mm. , thus eliminating its excess length from the non-welded outer end.
  • FIG. 3 represents, in the same way as FIG. 4, another so-called “bellows” folding mode 14 providing the same advantage of non-enlargement of the end of the pocket, the closure of the end then being carried out by gluing, or by welding, the latter being more delicate than in arc welding.
  • the housing 11 of the distributor 8 is made of aluminum with a thickness of the cylindrical body 0.35 mm and an opening or groove 15 with an internal diameter of 36.5 mm surmounted by a rolled edge 16 over approximately 150 ° of external radius 1.3 mm.
  • the attachment of the dome 2 to the rolled edge 16, after the closure of the pocket 13 and its introduction into the housing 11 was made by surface oxidation of the circular groove 6 of the dome 2 (Corona treatment) and bonding with cyanoacrylic adhesive of this groove 6 fitted on the rolled edge 16 and held in abutment for a little more than 1 minute during the drying of the glue.
  • Other known methods for treating the surface of the plastic groove can be used, for example a flame treatment or with a shaped electrode (Corona effect).
  • the metal fixing cup 17 of a distribution means 18, here capped with a pusher-diffuser 19, has been crimped with a seal under the bulge 7 of the upper end of the dome 2.
  • this means 18 is a product outlet valve, the annular gap 20 between the housing 11 and the pocket 13 is filled with a pressurized gas and the tight plug 21 is then replaced.
  • the means 18 is a pump without air intake, there is no need for propellant gas and putting the outside of the bag 13 at atmospheric pressure is sufficient, which simplifies the packaging.
  • the plug 21 is removed, and the bottom 22 of the housing provided with any air passage orifice has only a protective role for the bag, not necessary for the operation of the distribution.
  • dome 2 of the prefabricated part (dome + skirt) 1 is typically done by the packaging manufacturer.
  • Various methods can be used in mass production. The methods which relate to metal housings, typically aluminum or tinplate of thickness 0.2 mm to 0.6 mm, the distributors being as we have already seen pressurized or not, are commented below in relation with Figures 5 to 7.
  • FIG. 5 represents the fixing of a dome 2 provided with a skirt 4, of the same geometry as in the first two examples, on a housing 11 identical to the housing of FIG. 2, using an annular part of link 23 compatible both with the plastic of the dome 2 - here PE.HD - and the metal of the housing 11 - here aluminum.
  • This molded part 23 0.2 mm thick is in complex containing the same polyolefin as that of the dome 2, that is to say of PE, and EAA; its outer edge is snapped onto the end of the rolled edge 16, and after the installation of the part 1, the dome 2 coming to be applied by its circular groove 6 on the connecting part 23, the welding is carried out by the 'one of the following methods: by high frequency induction, by rotation, or by ultrasound by modifying the shape of the dome for the support of the ultrasonic transducer.
  • the dome 2 put in place by its circular groove 6 on the rolled edge 16 of the housing 11, has a circular groove end 6 projecting about 1 mm beyond the end of the rolled edge 16, without obstructing the interior of this rolled edge 16.
  • the interior cavity of the rolled edge 16 is at least partially filled by partially melting the outer lip 24 of the dome bordering the end of the circular groove 6, this lip 24 having at this point 1 mm thick.
  • a good quality sealed welded connection is obtained.
  • the end 24 of the dome 2 thus secured by the molding must come in the vicinity of the end of the rolled edge, either less than 0.5 mm before this end or a little further leaving at least 1 mm of passage inward of the rolled edge 16.
  • the fixing method of FIG. 7 uses an annular piece of plastic shape 25 of the same kind as that of the dome 2, the top of which is not shown, this piece 25 being placed on the end of the constricted housing. 26 before rolling its end edge.
  • This part 25, here in PE like the dome 2 has a base 27 resting on the shoulder 26 of the housing 11, an upper portion 28 which will be crimped as shown by rolling the upper end edge of the housing, as well as one or more surfaces, here the two surfaces 29 and 30, coming into contact with the outer skirt 31 of the dome 2.
  • the positioning of the shaped part 25, the rolled edge 16 and the dome 2 being made, the waterproof fixing is carried out by welding by rotation of the annular surfaces 29 and 30 against the annular portion 31 of the dome 2.
  • the fixing can also be made by welding by HF induction or by ultrasound.
  • the external geometry of the preassembled part 101 (FIG. 8) is the same as that of the part 1, but the reverse surface 32 of its dome 102 was provided during the molding of this dome 102 on the skirt 4 with an annular washer. 33 with barrier effect.
  • This washer 33 is welded to the dome 102 by a large face 34 and retained at its base by a small annular bead of plastic material 35. It generally has surface layers of polyolefin compatible with the polyolefin of the dome and an intermediate layer of A1 or barrier plastic.
  • the metalloplastic complex 0.28 mm thick in the first example is used here for the washer 33.
  • the housing 110 of FIG. 9 is made of plastic, here HDPE 0.6 mm thick in its cylindrical part.
  • This molded housing has at its upper end 116 a tube 111 of axial section rectangular which fits tightly between the inner tube 115 and an annular groove 114 of the dome 112, the tube 111 applying by its horizontal end against the bottom of the groove 114.
  • the fixing is preferably made by welding by rotation , it can also be made by gluing.
  • the horizontal annular surface 113 and the end of the outer lip 117 of the dome 102 can also intervene in this fixing.
  • FIG. 10 illustrates the process of the third manufacturing range.
  • the preassembled part 1 is the same as in the first two examples, and the fixing of this part 1 to the upper end of the housing 211 with separate bottom 212, tin box with external diameter 47 mm and thickness 0.3 mm is made like that of the second example, the skirt 4 not however being closed.
  • a cover 213 is adapted to protect the distribution means 18 and 19, and the filling takes place in the inverted position by the open end of the skirt 4 projecting from the body of the housing 211.
  • the end of the skirt 4 is then closed, typically by one of the methods already described in the second example, the closed end is freed and returned to the body 211, then the bottom 212 is crimped.
  • the dispenser is then pressurized if necessary as already described.
  • FIG. 11 shows a dome 302 made of PE.HD molded onto the upper end portion 3 of a metalloplastic skirt 4 identical to the skirt 4 of Example 1.
  • the internal tubing 325 of the dome 302 is molded on the inside of the end 3 of the skirt 4, the tubing 325 being reinforced by a thickening of its upper part which constitutes part of the periphery of its semicircular annular groove 6 for fixing to the housing 11.
  • the flared arrangement of the end 3 around the tube 325 results from the direction of injection of the HDPE, this injection pressing this end 3 against the annular molding tool.
  • the dome 302 is fixed to the rolled edge of the housing 11 by gluing with cyanoacrylate glue, in the same way as in Example 2.
  • the bulged upper part 70 of the dome 302 allows the distribution means to be fixed by expansion.
  • the plastic surfaces must preferably be prepared by surface oxidation such as flame or Corona effect, and the aluminum surfaces must preferably be previously varnished, these adhesives not giving satisfactory adhesion to bare aluminum.
  • Silicone glue requires pressing times of 1 to 2 min and ambient drying times greater than 24 h.
  • the three cyanoacrylate adhesives give similar results: the pressing times can be limited to 5 to 10 seconds, and the parts can be handled after 30 seconds to 1 minute at room temperature. These cyanoacrylate adhesives are therefore much preferable for industrial application.
  • the tubing 345 of which comprises, starting from its end lower: a flexible lip 346 delimiting with the circular cylindrical outer surface 347 of the tubing 345 an annular reserve 348 of height 2.5 mm, then 5 mm above the lower end a portion of frustoconical outer surface 349 of 1/2 cone angle between 1 and 2); this portion 349 comprising 2 hollow annular zones 350 and 351 of depth 0.06 to 0.08 mm, these zones of unitary heights 2 mm being connected to each other as well as to the cylindrical portion 347 by a plurality of hollow bridges of unit width 4 mm.
  • the frustoconical outer surface 349 extends to the lower edge 326 of the dome 322 corresponding to the open end of the groove 6 for attachment to the housing, this edge 326 serves as a stop and adjusts the threading of the skirt 4 around the tubing 14 mm high.
  • the skirt 4 is slightly tightened on the tubing 345, and we have here, for the inner skirt diameter of 34.45 mm with one end of the inlet tubing 352 progressive: a diameter of the cylindrical outer surface 347 of 34.1 mm, a flexible lip 346 of thickness 0.15 to 0.2 mm at its root and a frustoconical outer surface 349 ending with a diameter of 34.5 mm.
  • the tests with cyanoacrylate adhesive deposited in advance in the annular reserve 348 gave reproducible results and, according to the detachment tests of the skirt 4, a reliable seal is obtained at each of the hollow zones 350 and 351.
  • the tests carried out made it possible to highlight another advantage, particularly surprising and interesting from an economic point of view.
  • the use of the plastic dome makes it possible to reduce the size of the constriction of the upper end of the case in the case of a metal case. We can then significantly reduce the thickness of the cylindrical part of the housing, the only requirement for resistance to internal pressure allowing the thickness of the side wall to be less than the same requirement associated with the resistance requirement of the highly constricted dome. This reduction in wall thickness is typically 20 to 35% relative.
  • the application of the manufacturing process of the invention and of the corresponding bag dispensers extends to the distribution of aerosol products, liquids and creams or gels, in the pharmaceutical, cosmetological, hygienic and food fields.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Packages (AREA)
  • Closures For Containers (AREA)
EP89420269A 1988-07-25 1989-07-24 Procédé de fabrication et de conditionnement d'un distributeur à poche, sous-ensembles et distributeurs correspondants Expired - Lifetime EP0354137B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89420269T ATE87878T1 (de) 1988-07-25 1989-07-24 Verfahren zum herstellen von beutelspendern, entsprechende teile und spender.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8810228A FR2634466B1 (fr) 1988-07-25 1988-07-25 Procede de fabrication et de conditionnement d'un distributeur a poche, sous-ensembles et distributeurs correspondants
FR8817625 1988-12-23
FR8810228 1988-12-23
FR8817625A FR2642699B1 (fr) 1988-12-23 1988-12-23 Procede de fabrication et de conditionnement d'un distributeur a poche, sous-ensembles et distributeurs correspondants

Publications (2)

Publication Number Publication Date
EP0354137A1 EP0354137A1 (fr) 1990-02-07
EP0354137B1 true EP0354137B1 (fr) 1993-04-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89420269A Expired - Lifetime EP0354137B1 (fr) 1988-07-25 1989-07-24 Procédé de fabrication et de conditionnement d'un distributeur à poche, sous-ensembles et distributeurs correspondants

Country Status (10)

Country Link
US (2) US5031384A (pt)
EP (1) EP0354137B1 (pt)
JP (1) JPH0617074B2 (pt)
DE (1) DE68905881T2 (pt)
DK (1) DK364089A (pt)
ES (1) ES2039919T3 (pt)
FI (1) FI893546A (pt)
GR (1) GR3007575T3 (pt)
NO (1) NO893016L (pt)
PT (1) PT91260B (pt)

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GR3007575T3 (pt) 1993-08-31
DK364089A (da) 1990-01-26
EP0354137A1 (fr) 1990-02-07
DE68905881D1 (de) 1993-05-13
PT91260A (pt) 1990-02-08
JPH0292523A (ja) 1990-04-03
FI893546A (fi) 1990-01-26
US5123571A (en) 1992-06-23
ES2039919T3 (es) 1993-10-01
PT91260B (pt) 1995-07-03
NO893016L (no) 1990-01-26
US5031384A (en) 1991-07-16
DE68905881T2 (de) 1993-08-19
FI893546A0 (fi) 1989-07-24
DK364089D0 (da) 1989-07-24
NO893016D0 (no) 1989-07-24
JPH0617074B2 (ja) 1994-03-09

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