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
  • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
  • B65D77/10—Container closures formed after filling
  • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
  • B65D77/2004—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being maintained on the container by mechanical means, e.g. crimping, clamping, riveting
  • B65D77/202—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being maintained on the container by mechanical means, e.g. crimping, clamping, riveting the cover being connected to the container by separate circumferential ring elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D51/00—Making hollow objects
  • B21D51/16—Making hollow objects characterised by the use of the objects
  • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
  • B21D51/44—Making closures, e.g. caps
• • 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
  • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
  • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
  • B65D17/501—Flexible tape or foil-like material
  • B65D17/502—Flexible tape or foil-like material applied to the external part of the container wall only
• • 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
  • B65D51/00—Closures not otherwise provided for
  • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
  • B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
• • 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
  • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
  • B65D2517/0001—Details
  • B65D2517/0058—Other details of container end panel
  • B65D2517/008—Materials of container end panel
  • B65D2517/0082—Coated or laminated metal
• • 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
  • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
  • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
  • B65D2517/504—Details of preformed openings
  • B65D2517/5043—Details of preformed openings provided with a flange
  • B65D2517/5045—Down-turned flange, i.e. extending into container
  • B65D2517/5048—Down-turned flange, i.e. extending into container rolled or folded back, e.g. to avoid sharp edges
• • 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
  • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
  • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
  • B65D2517/504—Details of preformed openings
  • B65D2517/5043—Details of preformed openings provided with a flange
  • B65D2517/5051—Up-turned flange, i.e. extending away from container
  • B65D2517/5054—Up-turned flange, i.e. extending away from container rolled or folded back, e.g. to avoid sharp edges
• • 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
  • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
  • B65D53/08—Flexible adhesive strips adapted to seal filling or discharging apertures

Definitions

• the present invention relates to a cover ring. Furthermore, the invention relates to a container with a lid and a method for producing the cover ring.
• the lid which is permanently fastened to the container sump, is formed from a lid ring and a lid foil applied by heat sealing on the lid ring.
• lid films in particular metal foils or composite films are used.
• the lid foil closes the removal or lid opening formed by the lid ring for the contents of the package until it is used for the first time.
• an additional, preferably made of plastic lid is placed over the metal lid to make the container again closed. The latter, however, is only necessary if the packaging content is not completely used up the first time the container is opened.
• cover formed from cover ring and lid film are the same, which are made of conventional containers of containers, especially of metal containers.
• This also includes corrosion resistance, both against environmental influences and against the contents.
• Such contents are at least partially chemically aggressive.
• moisture or wet products as they occur in the field of food packaging, especially in retort food products, corrosion with regard to the longer storage time is a problem.
• Corrosion of the metal packaging material can here on the one hand to optical problems in the form of discoloration and on the other hand also lead to taste problems.
• iron oxide into the product also known as "ironing” leads to unacceptable changes in taste of the packaged food.
• the sheet metal from which the container sump or the cover rings or the sealed-on metal foil is coated.
• the inside of the container facing the contents is usually coated with polyethylene terephthalate (PET) or a lacquer which withstands the mechanical stress during the production of the container and also withstands aggressive contents over the desired storage period of sometimes several years.
• PET polyethylene terephthalate
• the outside of the container is usually coated with polypropylene or a polypropylene-containing material, since polypropylene is preferably used as sealing material for the lidding film.
• the side of the cover film facing the filling material coated with polypropylene is sealed onto the polypropylene-coated outer side of the cover ring facing away from the filling material.
• the cutting edge in the form of a roll inwards, that is, to the side of the filling out, bent and thus covered by a surface region of the cover ring.
• this solution causes quite high costs in the production of the corresponding tools. It is also particularly disadvantageous that even small deviations in the production lead to an irregular formation of the retort roll and lead to an irregular coverage of the cutting edge.
• the Retort process that is, the sterilization of the filling, by heating and cooling cause the contents itself or liquid from the contents in the retort roller passes.
• WO 01/07330 it is proposed that the coating of the formed from sheet metal cover ring is made after punching the removal opening by means of powder coating.
• the present invention has for its object to provide a cover ring or a corresponding lid and a corresponding container available, which or which avoid the disadvantages mentioned. Furthermore, the invention relates to a method for producing a cover ring.
• a cover ring according to claim 1.
• Preferred embodiments are subject of the dependent claims.
• a lid is defined in claims 8 to 10.
• a method for producing the cover ring is defined in claim 1 2.
• An inventive cover ring comprises a metal ring with a radially outer cut edge and a radially inner edge opening forming a cut edge.
• the metal ring is coated on both sides with at least one plastic layer.
• the radially inner cut edge is folded back on itself at least once. The fold is also pressed.
• An inventive cover ring comprises a metal ring coated on both sides with at least one plastic layer with a radial outboard cutting edge and a radially inner bounded by a cutting edge flange. On the flange a circumferential sealing zone is arranged. The radially inner flange is folded back on itself at least once and the fold or the folded edge of the flange forms a lid opening. In addition, Falz is pressed.
• a cover ring comprises a metal ring with a radially outer cut edge and a radially inner flange forming a cover opening.
• the metal ring is coated on both sides with at least one plastic layer.
• the radially inner flange is folded back on itself at least twice, as a result of which the cutting edge is enclosed by the plastic layer lying on the inner side of the rebate almost without air. With folded inside side that side of a fold is designated with the smaller fold radius. Since the radially inner flange is folded back on itself at least twice, the radially inner cut edge is not exposed to contact with the contents of the container.
• the cut edge is enclosed by the multiple fold between the lying on top of the lid ring and the cover ring bottom plastic layers virtually air-free and -proof. As a result, almost complete protection against corrosion is achieved in a simple manner. In addition, this results in a protection against injury during handling of the container by the user.
• the radially inner cut edge can be folded both toward the lid ring underside, ie toward the side facing the filling material, or towards the lid ring upper side, that is to the side facing away from the filling material. If the radially inner flange folded back two or more times on itself, the fold is always to the same side.
• the radially inner flange is folded back exactly twice on itself.
• the one or more fold of the radially inner Flange pressed. This achieves even better protection of the radially inner cut edge with respect to air and possibly with respect to contents.
• a lid ring core wall is formed radially outwardly lying on the folded-back radially inner flange with a peripheral sealing zone arranged thereon.
• the circumferential sealing zone is preferably arranged on the side facing away from the contents of the flange, that is, on the lid ring top side arranged.
• the radially inner flange is folded back on the sealing zone opposite side of the flange. That is, the boastgefalzte part of the radially inner flange or the radially inner cutting edge lie on the side facing the contents of the flange or the cover ring and thus on the cover ring bottom.
• the metal from which the lid ring is formed selected from the group consisting of aluminum, aluminum alloys, tinplate, black plate and steel. Tinplate is a thin cold-rolled steel sheet whose surface is coated with tin. Currently, sheet thicknesses of 0.1 to 0.5 mm are common.
• Black plate is made of mild steel and is annealed, reacting with oxygen in the ambient air and preserving its dark appearance.
• black plate When hot rolling, black plate is manufactured in thicknesses of 1, 5 mm and more.
• Cold-rolled black sheet on the other hand, can be produced with thicknesses of 0.4 to 1.5 mm thinner and with a better surface finish.
• the plastic with which the two sides of the cover ring sheet are coated selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate and polyamide.
• the top and bottom of the cover ring sheet can be coated with the same plastic or with different plastics. As a rule, they are coated with various plastics. With the Bottom of the cover ring plate or cover ring is called the contents facing side.
• the layer thickness of the plastic layers on the bottom and top of the cover ring is usually 5 ⁇ to 100 ⁇ , preferably 10 ⁇ to 50 ⁇ and more preferably from 20 ⁇ to 40 ⁇ . It can be arranged on both sides of the cover ring of the same plastic. However, the plastic layers arranged on the lower and upper side of the cover ring are preferably different, since they have to meet different requirements. While the plastic layer disposed on the underside of the lid ring serves to prevent corrosion of the lid ring plate, the plastic layer disposed on the top surface of the lid ring must be sealable since the lid film is sealed on a surface area on top of the lid ring, the seal zone.
• a lid is described with an inventive cover ring.
• the lid comprises the lid ring and a lid foil which is sealed in the sealing zone of the lid ring and closes the lid opening.
• the circumferential seal zone of the cover ring arranged on the radially inner flange adjoining the cover ring core wall is arranged on the upper side of the cover ring or on the outer side of the flange of the cover ring.
• the side of the cover film facing the filling material and thus also the upper side of the cover ring is preferably coated with PP or a polypropylene-containing material. But it can also be coated with another sealable material.
• the lid foil of the lid made of preferably coated with plastic aluminum.
• the aluminum foil is usually coated on one side with plastic, wherein on the sealable side of the lid foil preferably polypropylene (PP) is arranged.
• the sealable side of the lid film opposite side is usually printed and / or painted.
• other composite films can also be used as cover films, for example painted aluminum foils and laminated aluminum foils.
• aluminum-free composite films can be used as lidding films.
• all lid films must have a sealable side in order to produce a seal in the sealing zone of the lid ring arranged on the flange.
• the lidding film has an embossing or a print on.
• the lidding film may also have an embossing and a printing at the same time.
• unembossed lidding films can also be used.
• a container with the inventive lid or lid ring is described.
• the lid or the lid ring is preferably connected to the container sump by a rabbet joint.
• the connection between the cover and the fuselage could, however, also be made in a purely mechanical manner by positive locking and / or frictional engagement or gluing or hot-sealing or a combination of such fastening types in another way.
• a method for producing the inventive cover ring includes the step of at least simple folding of the radially inner flange. This creates a folded region in the radial direction. In this folded area, a double or multiple flange forms. After folding, the fold or the folded area is additionally pressed.
• a preferred embodiment of the method for producing the inventive cover ring comprises the step of folding the radial inside flange.
• the flange is folded at least twice, a triple or multiple flange is formed over the region folded in the radial direction and the cutting edge is enclosed by the plastic layers lying on the inside of the rebate almost free of air.
• the flange is bent or folded in the fold in the radial direction, which forms a circumferential fold.
• the radius of the surface area folded in the radial direction is generally only a few millimeters, preferably 1 to 3 mm.
• the folded area is additionally pressed in order to achieve an even better tightness of the fold against liquids, moisture and air and thus better protect the trapped cutting edge from corrosion in a further step.
• Fig. 1 shows a perspective view of a container with a tear-open lid
• FIG. 2 shows a perspective partial view of a cover ring blank
• FIG. Fig. 3 shows a partial perspective view of a lid ring blank in a further stage of manufacture
• FIG. 4 shows a cross section of a first embodiment of a flange of a cover ring according to the invention
• 5 shows a cross section of a second embodiment of a flange of a cover ring according to the invention
• FIG. 6 shows a cross section of a further embodiment of a flange of a cover ring according to the invention.
• Fig. 7 shows a cross section of the first embodiment of a flange of a cover ring according to the invention with the cover sheet sealed on; shows a cross section of the further embodiment of a flange of an inventive cover ring with sealed lid sheet;
• Fig. 1 shows a container 1 with a container sump 5, a Aufreissdeckel 3, which in turn comprises a fixed to the container sump 5 lid ring 7, a lid film 10 and a tear-15.
• the cover film 10 closes the removal opening of the tear-open lid 3.
• the cover film 10 is provided with a tear-open tab 15 for opening the lid 3.
• no difference of the container according to the prior art to a container with the inventive cover ring can be seen.
• FIG. 2 shows a perspective partial view of a cover ring blank 18.
• a cover ring blank 18 Shown is the package-side formation of the cover ring blank 18 for a rabbet joint of the cover ring with the container sump (not shown).
• the seaming edge 21 has, in the radial direction toward the center of the lid ring blank 18, a fold radius 22 with which the seaming edge 21 merges into the lid ring core wall 23.
• the lid ring core wall 23 is followed by the lid ring depth radius 24, which merges into the lid ring bottom 27.
• no lid or removal opening has yet been punched out in this production stage of the blanking blank.
• FIG. 3 shows a partial perspective view of a cover ring blank 18 in a further stage of its production.
• the cover ring blank 18 again has a folded edge 21 on the package side, a fold radius 22, a lid ring core wall 23 and a lid ring depth radius 24.
• the cover ring blank 18 now has a removal opening 36.
• the cover ring depth radius 24 merges into the flange 31 in the direction of the removal opening 36.
• the removal opening 36 is formed by the radially inward cutting edge 33 formed during the punching step.
• a sealing zone 30 is arranged on top of the lid.
• Fig. 4 shows in cross section a detail of a first embodiment of an inventive cover ring 7. Shown is in particular the folded portion d with the almost air-free enclosed cutting edge 33.
• the cover ring has a layer stack structure with the following layers, one Covering ring top side arranged plastic layer 37, a metal layer in the form of a metal ring 40 and a cover ring arranged on the bottom plastic layer 43.
• the cover ring arranged on the underside plastic layer to the Golfgutraum (not shown) facing and the cover ring upper side plastic layer facing away from the Gugutraum Side of the cover ring 7 and thus arranged to the outside of the container 1 out.
• the radially inner flange 31 was folded back twice on itself.
• Fig. 5 shows in cross-section a section of a second embodiment of an inventive cover ring 7.
• the double fold of the flange to cover ring top side is done so that the trapped cutting edge 33 on the Artgutraum (not shown) facing away from the lid ring 7 comes to rest.
• the flange 31 is again formed in three ways. Since now arranged in the folded area d on the Artgutraum facing lid ring inner side disposed plastic layer 43 on the lid ring outer side, the selected plastic is preferably also sealable. If the folded portion d has a sufficient radius, the sealing zone 30 can be limited to the folded portion d. However, it is also possible to extend the sealing zone 30 beyond the folded area onto the radially outer, further part of the flange 31 to maximally to the cover ring core wall (not shown). In this variant, however, the sealing zone 30 is interrupted by a gap 45.
• Fig. 6 shows in cross-section a section of another embodiment of an inventive cover ring 7.
• the radially inner flange 31 is folded back twice on the cover ring top.
• a gradation 48 in the region e corresponding to twice the thickness of the plastic coated cover ring 7 on both sides comes the cover ring top in the folded area d to lie in the same plane as the radially outer portion of the flange 31st
• the sealing zone 30 can thus be extended in a simple manner again over the entire radial length of the flange 31 up to the lid ring core wall (not shown).
• the sealing zone 30 is interrupted by a gap 45.
• Fig. 7 shows the embodiment shown in Fig. 4 of the inventive cover ring 7, which in turn is shown in fragmentary form.
• a cover film 51 is on the cover ring side upper plastic layer and thus on the cover ring top sealed.
• the sealing zone 30 extends in the illustrated example over the entire flange 31, that is, over the folded region d, in which the flange 31 is formed in three, further on the radially outer region of the flange 31 to a maximum towards the cover ring core wall (not shown).
• the double folding of the radially inner flange 31 was carried out in this embodiment to the lid ring bottom and thus to Gregutraum 55 out.
• the lying on the inside Falzinnenseite (46, 47), arranged on the metal layer in the form of a metal ring 40 plastic layers 37 and 43 almost free of air trapped cutting edge 33 is therefore on the Gregutraum 55 facing lid ring bottom.
• Fig. 8 shows the embodiment shown in Fig. 6 of the inventive cover ring 7, which in turn is shown in fragmentary form.
• a lidding film 51 is sealed on the cover-ring-side upper plastic layer. Since, in this embodiment, the double folding of the radially inner flange 31 takes place towards the upper side of the cover ring, the cutting edge 33 enclosed between the plastic layers 37 and 43 lies on the upper side of the cover ring, away from the filling space 55.
• the gradation 48 in the region e lies in the folded region d lying on the cover ring upper side plastic layer 43 in a plane with the on the metal layer 40 on the Gregutraum 55 facing away from the upper lid ring plastic layer 37.
• the lid film 51 can therefore be sealed without difficulty in the arranged on the flange 31 sealing zone 30.
• the sealing zone 30 extends beyond the folded region d further beyond the radially outer region of the flange 31 to at most toward the cover ring core wall (not shown).
• the cover film 51 closes on the one hand the removal opening (not shown) and also the gap 45 formed by the step 48 in the region e.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)
• Packages (AREA)
• Rigid Containers With Two Or More Constituent Elements (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=56740049

Family Applications (1)

Country Status (8)

Citations (8)

Family Cites Families (6)

• 2016
  • 2016-08-02 EP EP16020293.3A patent/EP3279105A1/de not_active Withdrawn
• 2017
  • 2017-08-02 BR BR112019001557-4A patent/BR112019001557A2/pt not_active IP Right Cessation
  • 2017-08-02 CN CN201780058848.1A patent/CN109789947A/zh active Pending
  • 2017-08-02 KR KR1020197006179A patent/KR20190039543A/ko not_active Application Discontinuation
  • 2017-08-02 WO PCT/EP2017/025227 patent/WO2018024376A1/de unknown
  • 2017-08-02 RU RU2019104244A patent/RU2019104244A/ru not_active Application Discontinuation
  • 2017-08-02 US US16/323,047 patent/US20190161263A1/en not_active Abandoned
  • 2017-08-02 EP EP17754074.7A patent/EP3494058A1/de not_active Withdrawn
  • 2017-08-02 MX MX2019001284A patent/MX2019001284A/es unknown

Patent Citations (9)

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