EP3805125B1 - Zweiteiliger abdrehdeckel für aufbewahrungsgläser - Google Patents

Zweiteiliger abdrehdeckel für aufbewahrungsgläser Download PDF

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Publication number
EP3805125B1
EP3805125B1 EP18921282.2A EP18921282A EP3805125B1 EP 3805125 B1 EP3805125 B1 EP 3805125B1 EP 18921282 A EP18921282 A EP 18921282A EP 3805125 B1 EP3805125 B1 EP 3805125B1
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EP
European Patent Office
Prior art keywords
lid
threaded ring
covering
edge
covering disc
Prior art date
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Active
Application number
EP18921282.2A
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English (en)
French (fr)
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EP3805125A1 (de
EP3805125C0 (de
EP3805125A4 (de
Inventor
Anatoliy Vasilievich HONCHAR
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Individual
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Individual
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Publication of EP3805125C0 publication Critical patent/EP3805125C0/de
Publication of EP3805125B1 publication Critical patent/EP3805125B1/de
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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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/14—Rigid discs or spherical members adapted to be held in sealing engagement with mouth of container, e.g. closure plates for preserving jars
    • B65D51/145—Rigid discs or spherical members adapted to be held in sealing engagement with mouth of container, e.g. closure plates for preserving jars by means of an additional element connected directly to the container

Definitions

  • the invention relates to the canned-foods industry, and specifically, to screw-type lids made of thin sheet metal and intended for hermetic sealing of glass storage jars having twist-off neck tops.
  • a lid for sealing glass storage jars having a twist-off neck top comprising a disk-shaped covering part provided with an annular channel for placing a sealing ring in the place of contact between the lid and the edge of the jar neck, as well as a cylindrical side part provided with retaining members for locking the lid on the jar neck (GOST 25749-2005 - Metal screw-type lids. Specifications).
  • a solid body of the known lid is made of soft (Rockwell hardness 51-54) tinplate having a thickness of 0.18, 0.20, or 0.22 mm.
  • the cylindrical side part of such lid is smooth on the outside and contains the retaining members for locking the lid on the jar neck in the form of a rolled lower edge with spiral protrusions.
  • the torque values required to open such lids range from 1.6 to 1.9 N ⁇ m for lids measuring 27 mm in diameter and increase to 5.9-6.4 N ⁇ m for lids measuring 110 mm in diameter. Opening jars closed with such lids requires excessive force and the use of extra tools. To ease the opening, consumers would sometimes bend the spiral protrusions on the lower edge of the side surface of the lid, e.g., with a knife. Applying such force may result in an injury, and may also affect the integrity and geometry of the edge of the lid, which prevents it from being reused.
  • the known twist-off lid requires a protective varnish coating, since the use of can-sealing machines (industrial of household) subjects the lid, and specifically, the areas of the cylindrical side part thereof and the edge with spiral protrusions (lugs), to excessive mechanical stresses. Even in case of the coating with several layers of high-quality protective varnishes or enamels, it is not possible to eliminate the occurrence of mechanical damage and deformation of the lid within these areas under exposure to high temperature and aggressive media (e.g., marinade), which subsequently leads to the appearance of rust on the lid and prevents reusing thereof.
  • high temperature and aggressive media e.g., marinade
  • Another screw-type lid intended for hermetically sealing a jar neck similar to the twist-off type is known, which consists of two separate parts, wherein the first part of such lid is made of a sheet metal and represents a covering disc, the edge of which is curled up to form a round curl and bent outward to form an annular channel for placing a seal and for seating said covering disc on the edge of the jar neck; and the second part of the lid is made of a plastic material and represents a cylindrical threaded ring, the inner surface of which is provided with the retaining members for locking the lid on the jar neck ( US2003141271 A1, B 65 D 41/34, publ. 07/31/2003 ).
  • said ring has an inwardly bent upper edge, and hermetic sealing of the jar is achieved as a result of applying a retaining contact force specifically from this bent edge of the ring toward the section of the covering disk located directly on the edge of the neck.
  • the curl along the edge of the covering disk only serves as a safe design feature thereof.
  • the tightness of the jar seal as a result of using such mechanism depends on the continuous compressive force transmitted from the plastic ring through the bent edge to the metal covering disk. Ensuring the required duration of such force is quite difficult. Producing a ring of such design requires the use of high-quality plastic with special characteristics.
  • the inwardly bent upper edge of the ring is subjected to excessive stress during the process of creating and maintaining a hermetic seal of the jar, which leads to the formation of microcracks and subsequent fracturing during reuse of the ring as part of the mechanical "closing-opening" cycles.
  • the retaining members intended for locking the lid on the jar neck are made in the form of a continuous spiral thread. It is impractical to use such thread on a glass jar having a standard twist-off neck with separate spiral protrusions provided on the outer surface thereof to guide the twisting movement of the lid.
  • the objective of the invention is to create a two-piece twist-off lid for glass storage jars, the design features of which allow achieving a high degree of hermetic seal, while the operating characteristics are consistent with the conditions of multiple use of the threaded ring as the component of said lid with the possibility of replacing the covering disc.
  • the proposed two-piece twist-off lid for glass storage jars comprises two separate parts, wherein the first part of the lid is made of a sheet metal and represents a covering disc, the edge of which is curled up to form a round curl and bent outward to form an annular channel for placing a seal and for seating said covering disk on the edge of the jar neck, and the second part of the lid is made of a plastic material and represents a cylindrical threaded ring, the inner surface of which is provided with retaining thread members for locking thereof on the jar neck.
  • the upper part of the threaded ring extends radially inward to form a retainer of the edge of the covering disc, which geometrically conforms to the curl of the covering disc.
  • Such design features ensure that the covering disc is pressed against the edge of the jar neck due to a contact force transmitted from the threaded ring, as it is screwed onto the jar neck, specifically to the round curl of the covering disc, which compresses elastically and creates an additional contact force between the two pieces of the lid.
  • the hermetic seal of the jar lasts longer, while the loads onto the individual structural elements of the ring are reduced, which allows preserving the integrity thereof over an extended period of time.
  • the retaining thread members located on the inner surface of the threaded ring of a two-piece lid according to the invention are made in the form of blade-like protrusions arranged at an angle along the circumference.
  • such blade-like protrusions are geometrically consistent with the design of the outer surface of a standard twist-off neck of glass jars, which are typically used as glass containers during canned food manufacturing.
  • the covering disc is made of elastic tinplate having a thickness of 0.08-0.16 mm and Rockwell hardness of 58-64.
  • tinplate having a thickness of 0.08-0.16 mm and Rockwell hardness of 58-64.
  • tinplate grades with Rockwell hardness of 58-64 e.g., T-61, T-65 or DR-550 (according to EN 10203/91), and thickness varying from 0.08 to 0.16 mm, is feasible according to the invention, and makes it possible to obtain a functional member of a modern two-piece twist-off lid.
  • the threaded ring is made of heat-resistant polycarbonate plastic.
  • the choice of this specific type of plastic which is non-toxic, resistant to mechanical damage, operates within the temperatures range from -100oC to +145°C, and has a melting point of up to 250°C, satisfies the rational requirements for organizing the food-canning process at home or commercially.
  • the threaded ring according to the invention has a much better ability to withstand the exposure to aggressive media in the process of using autoclaves compared to the conventional twist-off lids. When sealing glass jars using commercial can-sealing machines, the possibility of mechanical damage of the ring is generally eliminated.
  • heat-resistant polycarbonate plastic is well suited for displaying on the outer surface of the threaded ring high-quality raised elements (graphic or verbal) of various functionality: decorative, informative, advertising, social, etc.
  • graphics or verbal of various functionality: decorative, informative, advertising, social, etc.
  • the outer surface of the threaded ring according to the invention can be provided with stiffening members in the form of vertical ribs connected from the top by an annular stiffening member.
  • stiffening members in the form of vertical ribs connected from the top by an annular stiffening member.
  • a two-piece twist-off lid for glass storage jars consists of a covering disc (1) and a threaded ring (2).
  • Covering disc (1) comprises an edge in the form of a round curl (3), which is bent outward to form an annular channel (4) for placing a seal (5) and for making a contact with the edge of a glass jar neck (6) provided with spiral protrusions (7).
  • the inner surface of threaded ring (2) is provided with blade-like thread protrusions (8), which are arranged at an angle along the circumference to form a retaining system for locking the threaded ring (2) on the glass jar neck (6).
  • the total number of protrusions (8) is six, which is consistent with the typical number of spiral protrusions on the neck of a conventional glass jar.
  • the lead angle of thread protrusions (8) of the threaded ring (2) corresponds to the lead angle of spiral protrusions (7) on the glass jar neck (6) and constitutes 7.66°.
  • An upper part (9) of the threaded ring (2) is extended radially inward to form a retainer (10) locking the edge of the covering disk.
  • retainer (10) of the threaded ring (2) geometrically conforms to the round curl (3) of the covering disk (1).
  • Covering disk (1) is placed on top of the glass jar neck (6) so that annular channel (4) with seal (5) placed therewithin comes into contact with the edge of neck (6).
  • Threaded ring (2) is placed on the glass jar neck (6) over the covering disk (1), while retainer (10) is located above the round curl (3) of the covering disk (1), and thread protrusions (8) are positioned above the spiral protrusions (7) on the glass jar neck (6).
  • threaded ring (2) is rotated clockwise, which forces thread protrusions (8) to come under the spiral protrusions (7) on the glass jar neck (6); threaded ring (2) is lowered, and retainer (10) comes into contact with the round curl (3) of the covering disk (1) due to their conformance in terms of the shape. Furthermore, threaded ring (2) presses the covering disk (1) against the upper edge of the glass jar neck (6) via seal (5), thus resulting in reliable hermetic sealing of the jar. Curl (3) compresses elastically upon coming into contact with retainer (10) and creates an additional contact force between the two parts of the lid - covering disk (1) and threaded ring (2), which increases the shelf life of hermetically sealed jar.
  • threaded ring (2) can be rotated counterclockwise without any excessive force and without the use of additional tools. Furthermore, as shown in Fig. 4 , thread protrusions (8) wedge in between the spiral protrusions (7) on the glass jar neck (6) and round curl (3) of the covering disc (1); threaded ring (2) lifts up and retainer (10) comes out of contact with the round curl (3) of the covering disc (1) .
  • threaded ring (2) is removed together with the covering disk (1), which is held by thread protrusions (8).
  • threaded ring (2) is removed together with the covering disk (1), which is held by thread protrusions (8).
  • a direct contact between the ring and the contents of the glass jar, as well as contamination thereof, are eliminated.
  • the same covering disc and threaded ring can be used, however, it is recommended to replace the covering disc each time before closing such jar. This is an economical option to ensure a longer storage of the contents of unsealed glass jars, since the bottom (inner) surface of the covering disc will always be clean.
  • the threaded ring can be used repeatedly, while replaceable covering discs should only be used once.
  • the ring can withstand up to 10,000 closing-opening cycles.
  • the covering discs should advisably be procured in sufficient quantities, both with and without the ring.
  • threaded ring (2) according to the invention can be reinforced by using the stiffening members arranged on its outer surface (11).
  • the stiffening members on the outer surface (11) of the threaded ring (2) according to the invention are made in the form of vertical ribs (12) connected from the top by an annular stiffening member (13).
  • Such ring, reinforced by the stiffening members can withstand up to 30,000 "closing-opening" cycles.
  • the proposed two-piece twist-off lid for glass storage jars according to the invention can be used by consumers for home-canning, as well as by the canned foods industry for canning various types of food products by any of the known methods, such as pasteurization, sterilization, and conventional packaging of bulk foods (vacuum packing). Furthermore, there is no need to revamp the sealing units (can-sealing machines) of the conventionally equipped industrial plant processing lines.
  • the proposed two-piece twist-off lid for glass storage jars according to the invention is characterized by design features which collectively provide a high degree of hermetic sealing, while allowing for a multiple use of the threaded ring with the possibility of replacing the covering disc.
  • Components of the two-piece twist-off lid for glass storage jars can be manufactured in accordance with their design features based on the conventional industrial equipment by using modern technologies for manufacturing products from thin sheet metal and plastic.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Claims (3)

  1. Zweiteiliger Twist-Off-Deckel für Glasvorratsgläser, bestehend aus zwei separaten Teilen, wobei der erste Teil des Deckels ein Blech aufweist und eine Abdeckscheibe (1) aus elastischem Weißblech bildet,
    dessen Rand zu einer Rundkräuselung (3) aufgerollt und nach außen gebogen ist, um einen ringförmigen Kanal (4) zum Anbringen einer Dichtung (5) und zum Aufsetzen der Abdeckscheibe auf den Rand des Glashalses (6) zu bilden, und der zweite Teil des Deckels besteht aus einem Kunststoffmaterial und stellt einen zylindrischen Gewindering (2) dar, dessen Innenfläche mit Haltegewindeelementen zu seiner Verriegelung auf dem Glashals (6) versehen ist,
    wobei die Haltegewindeelemente (8) in Form von schaufelartigen Vorsprüngen ausgeführt sind, die in einem Winkel entlang des Umfangs angeordnet sind;
    dadurch gekennzeichnet, dass der obere Teil (9) des Gewinderings (2) sich radial nach innen erstreckt, um einen Halter (10) zu bilden, der den Rand der Abdeckscheibe (1) arretiert, wobei der Halter geometrisch an die Krümmung (3) der Abdeckscheibe angepasst ist, so dass, wenn der Gewindering auf den Glashals geschraubt wird, die Abdeckscheibe (1) aufgrund einer von dem Halter (10) auf die runde Krümmung (3) der Abdeckscheibe übertragenen Kontraktionskraft gegen den Rand des Glashalses (6) gedrückt wird; und dass, wenn der Gewindering (2) gegen den Uhrzeigersinn gedreht wird, sich die Gewindevorsprünge (8) zwischen den spiralförmigen Vorsprüngen (7) und der runden Krümmung (3) der Abdeckscheibe (1) verkeilen, der Gewindering (2) sich anhebt und der Halter (10) aus der Kontraktion mit der runden Krümmung (3) der Abdeckscheibe (1) kommt, wobei die Abdeckscheibe eine Dicke von 0.08-0,16 mm und eine Rockwell-Härte von 58-64 aufweist.
  2. Zweiteiliger Twist-off-Deckel für Glasvorratsgläser nach Anspruch 1, dadurch gekennzeichnet, dass der Gewindering (2) aus hitzebeständigem Polycarbonat-Kunststoff besteht.
  3. Zweiteiliger Twist-off-Deckel für Vorratsgläser nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Außenfläche (11) des Gewinderings (2) mit Versteifungselementen in Form von vertikalen Versteifungsrippen (12) versehen ist, die von oben durch ein ringförmiges Versteifungselement (13) verbunden sind.
EP18921282.2A 2018-05-30 2018-12-27 Zweiteiliger abdrehdeckel für aufbewahrungsgläser Active EP3805125B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
UAA201805998A UA118247C2 (uk) 2018-05-30 2018-05-30 Двокомпонентна кришка "твіст-офф" для скляних консервних банок
PCT/UA2018/000141 WO2019231429A1 (ru) 2018-05-30 2018-12-27 Двухкомпонентная крышка «твист-офф» для стеклянных консервных банок

Publications (4)

Publication Number Publication Date
EP3805125A1 EP3805125A1 (de) 2021-04-14
EP3805125A4 EP3805125A4 (de) 2021-12-15
EP3805125C0 EP3805125C0 (de) 2023-09-06
EP3805125B1 true EP3805125B1 (de) 2023-09-06

Family

ID=64604300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18921282.2A Active EP3805125B1 (de) 2018-05-30 2018-12-27 Zweiteiliger abdrehdeckel für aufbewahrungsgläser

Country Status (6)

Country Link
EP (1) EP3805125B1 (de)
EA (1) EA038807B1 (de)
ES (1) ES2971785T3 (de)
PL (1) PL3805125T3 (de)
UA (1) UA118247C2 (de)
WO (1) WO2019231429A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4428056A2 (de) 2020-10-05 2024-09-11 Tetra Laval Holdings & Finance S.A. Behälter mit verschlussanordnung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4560076A (en) * 1984-04-17 1985-12-24 Continental White Cap, Inc. Tamper indicating band for use in low rise cam-off application
US4694970A (en) * 1986-06-16 1987-09-22 Anchor Hocking Corporation Tamper evident composite closure
IT1237061B (it) * 1989-11-06 1993-05-13 Italcaps Spa Capsula di chiusura a vite, con filetto cedevole.
US6662958B2 (en) 2002-01-31 2003-12-16 Crown Cork & Seal Technologies Corporation Composite closure having disk tightening feature
US20180072467A9 (en) * 2006-01-14 2018-03-15 World Bottling Cap Llc Reduced gauge bottle cap
GB0909189D0 (en) * 2009-05-29 2009-07-15 Crown Packaging Technology Inc Closure assembly
US9688451B2 (en) * 2012-02-15 2017-06-27 Silgan White Cap LLC Composite closure with seal indicating panel

Also Published As

Publication number Publication date
EA038807B1 (ru) 2021-10-22
EP3805125A1 (de) 2021-04-14
EP3805125C0 (de) 2023-09-06
ES2971785T3 (es) 2024-06-07
WO2019231429A1 (ru) 2019-12-05
EA202000191A1 (ru) 2021-03-12
EP3805125A4 (de) 2021-12-15
UA118247C2 (uk) 2018-12-10
PL3805125T3 (pl) 2024-03-04

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