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
  • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
  • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
  • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
  • B65D41/0471—Threaded or like caps or cap-like covers secured by rotation with means for positioning the cap on the container, or for limiting the movement of the cap, or for preventing accidental loosening of the cap
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
  • B29C45/006—Joining parts moulded in separate cavities
• • 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
  • B65D47/00—Closures with filling and discharging, or with discharging, devices
  • B65D47/04—Closures with discharging devices other than pumps
  • B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
  • B65D47/24—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge with poppet valves or lift valves, i.e. valves opening or closing a passageway by a relative motion substantially perpendicular to the plane of the seat
  • B65D47/241—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge with poppet valves or lift valves, i.e. valves opening or closing a passageway by a relative motion substantially perpendicular to the plane of the seat the valve being opened or closed by actuating a cap-like element
  • B65D47/242—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge with poppet valves or lift valves, i.e. valves opening or closing a passageway by a relative motion substantially perpendicular to the plane of the seat the valve being opened or closed by actuating a cap-like element moving helically
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
  • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
• • 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
  • B65D2401/00—Tamper-indicating means
  • B65D2401/15—Tearable part of the closure
  • B65D2401/20—Frangible elements completely enclosed in closure skirt

Definitions

• the present invention relates to a method for the assembly of plastic closures, which in the assembled position are connected to a second closure part or the container neck and wherein means are present on both parts which enable the radial position of the two parts to be clearly positioned relative to one another enables.
• the geometrical circumstances force one to assemble the closure from two parts.
• Such a closure then has a first part which is placed on a container and a second part which is placed on the first part.
• Known examples are closures in which the second part is to be kept in a certain position by means of a guarantee band before being used for the first time.
• the guarantee band also has sawtooth-like teeth protruding towards the center of the closure, while at least one cam is present on the second, rotatable part, which engages behind the teeth.
• the second locking part cannot be turned to the first.
• the two locking parts are simply screwed together completely. This is not unproblematic, since the guarantee tape is only molded onto the closure part via thin webs. It happens again and again that these webs are overstretched and tear when screwed together. A final check should therefore be carried out after assembly.
• this is not possible in terms of price and personnel.
• the same problem also arises with rotary closures on containers, the container neck of which have the features of the first closure part described above.
• the object of the invention is therefore to create a method by means of which the closures described above can be installed more quickly and more securely, so that the above-mentioned damage does not occur.
• This problem is solved by a method according to claim 1. It is a further merit of this invention that, using this assembly method, new construction principles are made possible which previously failed on the assembly.
• Figure 2 is a view of a twist lock from below Figure 3 in side view and Figure 4 in cross section, and Figure 5 matching the above closure
• Figure 7 is a plastic closure that can only be assembled according to the inventive method.
• Figures la-ld which serve to demonstrate the sequence of the assembly process, symbolically show the two parts 10 and 20 to be assembled one on top of the other.
• 10 represents the upper closure part of a two-part plastic closure or the one-part plastic closure itself
• 20 represents either the lower part a two-part plastic closure that can be placed on a container neck or represents the container neck itself.
• 11 and 21 denote those means which enable the unique positioning of the respective part.
• These can be means specially provided for this purpose, or, due to the special shape of the closure or the container, can already be present features, such as the tab of a guarantee band, a pouring spout of a closure or a handle of a container, without any other means would be excluded.
• these can be detection features that can be scanned optically or mechanically. The most general case is assumed in FIG. In general, the two parts 10, 20 can be inserted into an assembly device in a pre-oriented manner with respect to their axial direction.
• the two parts to be assembled are rotated relative to one another about the common axis of rotation D until the positioning means on the two parts 10, 20 are in the predetermined relative position to one another.
• this can be the case if the two positioning means 11, 21 are in the same position.
• any other mutual layers can also occur.
• FIGS. 2-5 show a simple rotary lock and a matching container neck.
• the plastic closure consists of a simple screw cap 30 with a guarantee band 32 molded onto the lower edge over a severely weakened point 31.
• Saw-tooth-shaped blocking members 33 are arranged on the latter, towards the center.
• the guarantee band 32 can be gripped by a tear-off tab 34. Before using for the first time, the guarantee band 32 must be torn off by pulling on the tab 34.
• the container B (FIG. 5) with the container neck 40 has an external thread 41 and adjoining it a slightly widened shoulder 42.
• locking members 43 are in turn arranged on the shoulder 42 as in the case of the screw cap in the same arrangement, but not necessarily n the same number, available.
• the screw blanket simply screwed onto the container neck 40.
• the locking members should have slid over one another. As already mentioned at the beginning, the guarantee band of the release was often released from the closure.
• the screw cap 30 can be clearly positioned in the radial direction without additional means.
• the tear-off tab can be used for this purpose, for example. This means that the relative rotary movement of the screw cap can already take place during the introduction into the assembly device. However, if the guarantee band 32 were designed in such a way that it is blown off by the rotary movement relative to the container neck 40, no tear-off tab would be required. In this case, the screw cap must have a different, additionally molded-on positioning means. As shown, this can be a rib or wart 35 molded onto the circumference of the guarantee band, but also onto the rotating cap itself.
• the container B If this is asymmetrical, the radial positioning can again take place during the pre-orientation in the feed phase. However, if the container is rotationally symmetrical, a special radial alignment device must also be used. be brought. For example, this is a rib or wart 44 formed underneath the shoulder 42. Of course, the positioning means can be designed as desired and, depending on the situation, can also be optically or mechanically scanned. Although it goes without saying, for the sake of completeness it should be mentioned that the container neck does not have to be made of plastic, but can be made of any material with sufficient strength.
• the example according to FIG. 7 is intended to clarify that the method also allows completely new closure designs that would not be possible with the conventional assembly method.
• the closure shown here in section is a so-called central pin lock.
• This plastic closure is in two parts. It has a lower part 50 and an upper part 60.
• the lower part 50 has an external thread 51 at the top and the upper part 60 has an internal thread 61.
• a central pin 52 is connected at a distance by means of webs 53 to the wall area 54 provided with an external thread 51. Lateral outlet openings 55 are between the webs 53.
• the upper part 60 is like a simple screw cap with a central outlet opening 62 in the upper cover surface 63
• the central pin 52 lies sealingly in the outlet opening 62, the upper side of the pin 52 being flush with the cover surface 63 of the upper part 60.
• Such closures are known per se. However, they must be secured against being accidentally screwed on completely. So far, this has usually been done by means of an annular bead on the inside of the upper part and on the outside of the lower part. Nevertheless, overturning was possible and the stroke was gradual and not suddenly hard.
• the two-part plastic closure shown here now has, on the upper closure part 60, radially inwardly directed, axially extending stop walls 64 and at least one stop wall 56 which is injection molded onto one of the webs 53.
• the two externally perfect rotationally symmetrical parts can now be introduced radially repositioned into the assembly device.
• the two parts 50, 60 are brought together in the axial direction. If they lie on top of one another, the two parts are rotated relative to one another, this advantageously being done by holding one part 50 and rotating the other part 60. Grab it the two threads 51, 61 into each other. The rotary movement ends as soon as the two stop walls 56, 64 collide. The stop walls thus serve as radial positioning means. Then you push the two parts together according to the procedure, whereupon the closure is in the shooting range.
• the now closed closure can now be mounted on a container according to the conventional method.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Closures For Containers (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4212621

Family Applications (1)

Country Status (5)

Families Citing this family (4)

Family Cites Families (6)

• 1988
  • 1988-04-25 CH CH1531/88A patent/CH676226A5/de not_active IP Right Cessation
• 1989
  • 1989-04-04 JP JP1503942A patent/JPH02504014A/ja active Pending
  • 1989-04-04 EP EP89903677A patent/EP0374203A1/de not_active Withdrawn
  • 1989-04-04 AU AU34381/89A patent/AU3438189A/en not_active Abandoned
  • 1989-04-04 WO PCT/CH1989/000066 patent/WO1989010313A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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