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 canning industry, and in particular to screw caps for hermetically sealing glass cans with a crown of a twist-off type made using thin sheet metal.
• a lid for sealing glass cans with a crown of the neck of the twist-off type comprising an end disk-shaped part with an annular groove in the place where the lid fits to the edge of the neck of the can to accommodate the sealing ring, as well as a side cylindrical part with fixing elements of the lid on the neck of the can ( GOST 25749-2005 - Metal screw caps. Technical conditions).
• the one-piece body of the well-known lid is made of soft (hardness 51-54 Rockwell units) sheet, the thickness of which is 0.18 mm, 0.20 mm or 0.22 mm.
• the lateral cylindrical part of such a lid is smooth on the outside and contains lid fixing elements on the neck of the can in the form of a rolled lower edge with screw protrusions.
• the values of the torque when opening such covers are in the range from 1.6-1.9 N m for covers with a diameter of 27 mm and increase to 5.9-6.4 N m for covers with a diameter of PO mm.
• excessive force and the use of additional devices are required.
• the screw protrusions on the lower edge of the side surface of the lid consumers are bent, for example, with a knife. Applying such force may result in personal injury. can also violate the integrity and geometry of the edge of the lid, which excludes its reusable use.
• the well-known twist-off cover requires coating with a protective varnish, since during the application of seaming machines - industrial or household - the cover is subjected to excessive mechanical stresses, in particular, in areas of the lateral cylindrical part and its edge with screw protrusions (cams) . Coating even several layers of high-quality protective varnishes or enamels does not exclude the occurrence of mechanical damage and deformation of the lid in these areas under conditions of high temperature and aggressive environment (for example, marinade), which subsequently leads to the appearance of rust on the lid and makes it impossible to reuse it.
• high temperature and aggressive environment for example, marinade
• a screw cap for hermetically sealing jars with a crown similar to a “twist-off” neck which consists of two separate parts, the first part of such a lid made of sheet metal and is a covering disc, the edge of which is curled up to form a round curl and bent outward with the formation of an annular groove to accommodate the seal and install the covering disc on the edge of the neck of the can, and the second part of the lid is made of plastic and is a cylindrical cut a filler ring, on the inner surface of which there are made elements for fixing the lid on the neck of the can (US2003141271 Al, B 65 D 41/34, publ. 31.07.2003).
• this ring is made with the upper edge bent inward, and the cans are hermetically sealed as a result of applying a contact holding force from this bent edge of the ring to the covering disk in its area directly on the neck edge, while the curl along the edge of the covering disk edge only serves its safe design.
• the tightness of the can closure in the process of applying such a mechanism depends on the continuous compressive force transmitted from the plastic ring through the bent edge to the metal covering disk. It is quite difficult to ensure the duration of such an effort at the required level; to produce a ring of such a design, it is necessary to use high-quality plastic with special characteristics.
• the upper edge of the ring bent inward is subjected to excessive stress during the creation and preservation of hermetic capping of the can, which leads to the formation of microcracks and its further destruction with repeated use of the ring in mechanical cycles of “closing-opening”.
• the lid fixing elements on the neck of the can are made in the form of a continuous spiral thread. Such a thread is impractical to use for use on a glass jar with a standard “twist-off” neck, on the outer surface of the crown of which separate screw protrusions are made that guide the screw movement of the lid.
• the present invention is the creation of a two-component lid "twist-off" for glass cans, the design features of which allow for high tightness of closure, and performance characteristics correspond to the conditions of reusable use of the threaded ring as its component with the possibility of replacing the cover disc.
• the proposed two-component “twist-off” lid for glass cans consists of two separate parts, the first part of the lid is made of sheet metal and is a covering disc, the edge of which is curled up to form a round curl and bent outward to form an annular groove for placement seal and install the cover disk on the edge of the neck of the can, and the second part of the lid is made of plastic and is a cylindrical threaded ring on the inner surface threaded elements of which are made fixed on the neck of banks, which is in accordance with the invention, the upper part of the threaded ring is formed radially extended inwardly to form a detent edge of the covering disc, which corresponds geometrically to curl the covering disc.
• Such design features ensure that the covering disc is pressed against the edge of the neck of the can through the contact force that is transmitted from the threaded ring when it is screwed onto the neck of the can to the round curl of the covering disc, the curl springs and creates additional contact force between the two parts of the lid.
• the duration of hermetic capping of the can is increased, and the load on the individual structural elements of the ring is reduced, which allows to preserve the integrity of the ring for a long time.
• the threaded fixation elements on the inner surface of the threaded ring of a two-component cover in accordance with the invention are made in the form of lobiform protrusions arranged in a circle at an angle.
• Such blade-shaped protrusions geometrically - according to the angle of inclination, length and in the amount of 6 pieces - correspond to the design of the outer surface of the standard neck of twist-off glass jars, which are usually used as glass containers in the manufacture of canned food.
• the cover disc is made of elastic sheet, the thickness of which is 0.08-0.16 mm, and the hardness is 58-64 Rockwell units. Thanks to the use of just such a thin and hard sheet, it becomes possible to achieve the necessary technical effect. To ensure the presentation of the covering disc from such a sheet, only 1-2 layers of protective varnish will be sufficient. Tin with such characteristics was experimentally selected from the variety of varieties offered by modern industry.
• grades of tin with a hardness of 58-64 units per Rockwell for example, tin of grades T-61, T-65 or DR-550 (according to standard EN 10203/91), the thickness of which varies in the range of 0.08-0.16 mm, is appropriate in accordance with the invention and makes it possible to obtain a functional element of a two-component modern twist-off cover.
• the threaded ring is made of heat-resistant polycarbonate plastic.
• the choice of just such a modern version of plastic - non-toxic, resistant to mechanical damage, with a range of operating temperatures from -100 ° C to + 145 ° C and a melting point up to 250 ° C - meets the rational requirements for organizing the preservation process in domestic household conditions, as well as in the canning industry.
• the threaded ring made in accordance with the invention in comparison with conventional twist-off lids, can withstand the influence of aggressive media in the process of using autoclaves much better, and when glass jars are sealed with industrial sealing machines, mechanical damage to the ring is generally eliminated.
• heat-resistant polycarbonate plastic is suitable for high-quality relief display on the outer surface of the threaded ring of graphic or verbal elements of various functional orientations: decorative, informative, advertising, social, etc. This feature opens up additional possibilities for the application of the proposed new cover, taking into account the needs of modern marketing.
• stiffeners can be made in the form of vertical stiffeners connected from above by an annular stiffener.
• the threaded ring as part of a two-component twist-off cover with a reusable function exhibits enhanced mechanical strength, while its service life is increased.
• the function of stiffening elements can also be simultaneously performed by a decorative relief applied to the external surface of the threaded ring in any variant in accordance with marketing goals.
• Fig. A shows a vertical section through a two-component twist-off lid for assembled glass cans.
• Figure 2 shows a vertical section of a threaded ring of a two-component twist-off lid for glass cans.
• Fig. 3 shows a view A of a vertical section of a two-component twist-off lid for glass cans assembled in the position "can is closed, the ring is screwed.”
• Figure 4 shows a view A of a vertical section of a two-component twist-off lid for glass cans assembled in the position "can is closed, the ring is unscrewed.”
• Figure 5 shows a view A of a vertical section of a two-component twist-off lid for glass cans assembled in the position "the can is open, the ring is unscrewed.”
• Figure 6 shows a vertical section of the threaded ring of a two-component twist-off lid for glass cans in the embodiment with a stiffener.
• FIG. 7 shows a view In a vertical section of a threaded ring of a two-component twist-off lid for glass cans in the embodiment with a stiffener.
• a two-component twist-off lid for glass cans consists of a cover disc 1 and a threaded ring 2.
• the cover disc 1 comprises an edge in the form of a round curl 3, which is bent outward to form an annular groove 4 for accommodating the seal 5 and contact installation on the edge of the neck 6 of the glass jar with screw protrusions 7.
• threaded vane-shaped protrusions 8 are made on the inner surface of the threaded ring 2, which are arranged in a circle at an angle and form a system for fixing the threaded ring 2 on the neck 6 of the glass jar.
• the total number of projections 8 is six, which corresponds to the usual the number of screw protrusions on the neck of a standard glass jar.
• the angle of elevation of the threaded protrusions 8 of the threaded ring 2 corresponds to the angle of elevation of the screw protrusions 7 on the neck 6 of the glass jar and is 7.66 °.
• the upper part 9 of the threaded ring 2 is made radially expanded inward with the formation of the latch 10 of the edge of the covering disk.
• the retainer 10 of the threaded ring 2 geometrically corresponds to the circular curl 3 of the covering disk 1.
• Cork glass jar proposed in accordance with the invention a two-component lid as follows.
• the cover disk 1 is applied to the neck 6 of the glass jar, while the annular groove 4 with the seal 5 placed in it comes into contact with the edge of the neck 6.
• the threaded ring 2 is put on the neck 6 of the glass jar over the cover disk 1, while the latch 10 is above the round a curl 3 of the covering disk 1, and the threaded protrusions 8 are placed above the screw protrusions 7 on the neck 6 of the glass jar.
• the threaded ring 2 is rotated clockwise, as a result of which the threaded protrusions 8 come under the screw protrusions 7 on the neck of the glass jar 6, the threaded ring 2 is lowered, and the latch 10 comes into contact with the round curl 3 of the covering disk 1 due to their correspondence to each other in form.
• the threaded ring 2 presses the covering disk 1 to the upper edge of the neck 6 of the glass jar through the seal 5 and the jar is reliably sealed.
• Curl 3 springs in contact with the latch 10 and creates an additional contact force between the two parts of the lid - the covering disk 1 and the threaded ring 2, which increases the tight sealing time of the can.
• the threaded ring 2 is removed together with the covering disk 1, which is held by the threaded protrusions 8. In this case, the ring does not directly contact the contents of the glass jar and its contamination is eliminated.
• the threaded ring 2 according to the invention can be reinforced with stiffeners formed on its outer surface 11.
• the stiffeners on the outer surface 11 of the threaded ring 2 in accordance with the invention are made in the form of vertical stiffeners 12 connected from above by an annular stiffener 13.
• Such a ring reinforced by stiffeners can withstand up to 30,000 “close-open” cycles.
• the two-component twist-off lid for glass cans proposed in accordance with the invention can be used by consumers both at home for the manufacture of home preservation, and in the canning industry for canning various types of food products by any of the known methods - pasteurization, sterilization, conventional packing of bulk (evacuation). At the same time, on standard equipped technological lines of industrial enterprises, re-equipment of capping units (seaming machines) is not required.
• twist-off twist-off lid for glass cans proposed in accordance with the invention is characterized by design features that together provide high tightness of closure, as well as exploitation of a threaded ring with the possibility of replacing the cover disc.
• the components of a two-component twist-off lid for glass cans can be made in accordance with their design features on the basis of well-known industrial equipment using modern technologies used for the manufacture of products from thin sheet metal and plastic.

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

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (6)

Families Citing this family (1)

Citations (5)

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• 2018
  • 2018-05-30 UA UAA201805998A patent/UA118247C2/uk unknown
  • 2018-12-27 PL PL18921282.2T patent/PL3805125T3/pl unknown
  • 2018-12-27 WO PCT/UA2018/000141 patent/WO2019231429A1/ru unknown
  • 2018-12-27 EP EP18921282.2A patent/EP3805125B1/de active Active
  • 2018-12-27 EA EA202000191A patent/EA038807B1/ru unknown
  • 2018-12-27 ES ES18921282T patent/ES2971785T3/es active Active

Patent Citations (5)

Non-Patent Citations (1)

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