Metal container and metal container cover

Abstract

Metal container and cover for the metal container, wherein the metal container (1) has a tubular body with walls (2) and a bottom (3) which is permanently fixed at the lower end of the walls (2) by a double-bent outer roll (4), wherein an upper circumferential edge (5) of the container (1) is formed by an outwardly bent upper end of the walls (2) which have an outwardly projecting first reinforcing rib (6) parallel to the upper edge (5), wherein the tubular body of the container has rounded corners, wherein an outwardly projecting limiting rib (8) is spaced apart along the circumference of each rounded corner below the first reinforcing rib (6) and parallel to the upper edge (5), and wherein a second reinforcing rib (7) is spaced apart above the first reinforcing rib (6) and parallel thereto, and wherein, centrally between the two reinforcing ribs (6) and (7),two supports (10) are permanently fixed to the walls (2) of the container and opposite each other, on which a handle (11) is rigidly mounted, and a metal cover (9) with an embossed profile for closing the product container, comprising a closing plate (1a) and a vertical side wall (2a) along its circumference, which has an outwardly and downwardly curved loose end (3a) provided with a seal (4a), and an outwardly projecting gripping edge (10a) formed in the side wall (2a) and parallel to the closed end (3a), wherein the outwardly curved loose end (3a) of the vertical side wall (2a) has a radially curved section (7a) extending into an inwardly curved spiral section (8a), the seal (4a) being placed in the curved section (7a), and the gripping edge (10a) extending along the entire circumference of the side wall (2a). extends, characterized thereby,that on each of the four side walls of the metal container (1) there is a symmetrically formed 0.5 mm deep embossed stamping (12) with a rectangular outline, and on the closing plate (1a) of the metal cover (9) a central area (5a) is formed which is covered by a downwardly facing embossed profile (6a).

Description

FIELD OF THE INVENTION

[0001] The invention relates to a metal container designed for the storage and transport of products from the food processing industry and the chemical industry, as well as a cover for the metal container. BACKGROUND

[0002] The closest prior art document is BG 1890 U1, published on May 31, 2014, which relates to a metal container intended for the transport and storage of products from the food and chemical industries. The metal container comprises a tubular body with walls 3 and a bottom 4, which is permanently fixed to the lower end of the walls 3 by a double-bent outer (flanged) collar bushing 5. An upper peripheral edge 6 of the container 1.2 is formed by an outwardly bent upper end of the walls 3, which have a first reinforcing rib 7 projecting outwardly, parallel to the upper edge 6. The tubular body has a rectangular cross-section with rounded corners, and at the periphery of each rounded corner there is a projecting limiting rib 9, with a clearance below the first reinforcing rib 7 and parallel to the upper edge 6.With a free space above the first reinforcing rib 7 and parallel to it there is a second reinforcing rib 8. Centrally between the two reinforcing ribs 7 and 8 on the walls of the container, two supports 10 are permanently fixed opposite each other, to which a handle 11 is permanently fixed.

[0003] Prior art document BG 1892 U1 describes a metal cover for closing a product container, comprising a closing plate 1 and a peripheral vertical side wall 2 having an outwardly and downwardly bent loose end 3 provided with a seal 4. An outwardly projecting gripping edge 10 is formed in the side wall 2, parallel to the closed end 3. The closing plate 1 has a central region 5 enclosed by an inverted U-shaped groove 6, the outer wall of which represents the vertical side wall 2 of the cover. The inner wall of the U-shaped groove 6 is lower than the height of its side wall 2. Immediately adjacent to the inner wall of the U-shaped groove 6 and concentric with it in the central region 5, there is an upwardly facing U-shaped reinforcing rib 9.The outwardly bent loose end 3 of the vertical side wall 2 has a section 7 curved in a radius, which merges into an inwardly bent spiral section 8, the seal 4 being placed in the curved section 7. BRIEF SUMMARY

[0004] The object of the present utility model is to create an optimized structure for a metal container and a cover (lid) for the metal container, which would result in a longer preservation time of the qualities of the stored product, in order to achieve an increased mechanical resistance as well as an improved resistance to opening after closing the cover.

[0005] The task was accomplished by creating a metal container with an embossed stamping and a cover with an embossed profile designed to close the container.

[0006] The metal container comprises a tubular body with walls and a bottom permanently fixed to a bottom edge of the walls by a double-curved outside curl, an upper peripheral edge of the container being formed by an outwardly curved upper edge of the walls having an outwardly projecting first reinforcing rib parallel to the upper edge. The tubular body has a rectangular or square cross-section with rounded corners, each rounded corner having an outwardly projecting reinforcing rib spaced below the first reinforcing rib and parallel to the upper edge. With a clearance above the first reinforcing rib and parallel to the rib, there is a second reinforcing rib. Centrally between the two reinforcing ribs and on the walls of the container, two supports are permanently fixed opposite each other, to which a handle is permanently fixed.

[0007] All four sides have a 0.5 mm deep embossed stamp with a rectangular shape.

[0008] This technical solution leads to an improvement in the mechanical strength of the container, as it further strengthens its vertical and lateral stability. It was unexpectedly discovered that the metal container could be manufactured from thinner sheet metal, but thanks to the embossed stamping, the mechanical resistance and strength of the container according to the utility model were improved compared to the prototype.

[0009] With regard to the metal cover according to the utility model, it was found that it could also be made of a thinner sheet and, nevertheless, due to its embossed profile, could achieve greater mechanical resistance compared to the known cover.

[0010] The embossed stamping of the metal container is located symmetrically about its four vertical sides. The embossed stamping has a rectangular outline that is equidistant by a clearance A from the double-curved outer flanged collar pressed against the wall and the upper peripheral edge and from the surrounding rounded edges of the metal container. The embossed stamping is centered toward the inside of the 6 mm wide metal container. The embossed stamping has a slanted outline relative to the flat surface outside the embossed stamping.

[0011] Thanks to the embossed stamping, the container is resistant to strong deformations of the side body without the risk of leakage of the contents. The optimized design of the embossed metal container provides 8.5% greater resistance.

[0012] Embossed stamping provides options for manufacturing the metal container from a thinner sheet (tin). Embossed stamping thus compensates for the mechanical strength of the side walls made of a thinner material, compared to a container made from a thicker sheet but without stamping.

[0013] The stamped metal cover comprises a locking plate and a peripheral vertical sidewall with an outwardly curved loose end provided with a seal. An outwardly projecting gripping edge is formed in the vertical sidewall parallel to the outwardly curved closed end. The outwardly curved loose end of the vertical sidewall has a radius-curved section that transitions into an inwardly curved spiral section, with the seal located in the curved section.

[0014] The embossed profile has a square outline and is positioned in the center of the metal cover with radius milling / corner rounding in the four corners. The embossed profile is located at a lower height than the other elements of the metal cover, and the transition between the embossed profile and the rest of the metal cover is formed by a sloped contour. A flat surface is located on the outside of the sloped contour.

[0015] In the metal cover structure, the U-shaped groove of the prototype has been replaced by a stamped profile on the closing plate. This ensures increased mechanical strength of the metal cover and also minimizes the amount of air trapped on the metal container after the cover is closed. This reduces the risk of drying out or spoilage of the top layer of the food product placed in the metal container. The metal cover structure according to the utility model results in a reduction of the air cushion by approximately 60%.

[0016] By optimizing the structure of the metal cover through the embossed profile, the material usage (sheet metal) for the cover is reduced by 6% compared to that produced using sheet metal of the same thickness with the U-shaped groove.

[0017] Steel sheets with a hardness of TS 360 are used to manufacture the metal cover with the embossed profile, unlike the regular cover, where the sheet hardness is TS 245. The difference is 115 units or 30%. The sheet thickness for the embossed profile cover is 0.20 mm, compared to 0.25 mm for the regular cover. The mass of the inserted material for one cover with an embossed profile is 31.2% less than that of a regular cover.

[0018] The metal container of the prior art is made of sheet metal with a thickness of 0.31 mm to 0.50 mm, and the metal container according to the utility model is made of sheet metal with a thickness of 0.23 mm to 0.28 mm. As a result of the embossed stamping on the metal container, despite the thinner sheet metal used in the utility model, improved performance is achieved, both in terms of its mechanical strength and better product storage conditions.

[0019] The utility model offers the following advantages.

[0020] Embossed stamping on a metal container improves its vertical and lateral mechanical strength, allowing it to withstand significant deformations caused by the lateral body without the risk of leakage of its contents. It provides options for manufacturing the metal container from thinner sheet metal (tin). Embossed stamping compensates for the mechanical strength of side walls made of thinner material compared to a container made from thicker sheet metal but without stamping.

[0021] Replacing the U-shaped groove of the lid with an embossed profile increases the mechanical strength of the metal lid. The embossed profile also ensures that a minimized amount of air is left inside the container after the lid is closed. This reduces the risk of drying out or spoilage of the top layer of the food product placed inside the metal container. The structure of the metal lid according to the utility model results in a reduction of the air cushion by approximately 60%.

[0022] Due to the optimization of the shape, the source material (sheet metal) used to make the cover is 6% less than the material used to make the U-shaped groove using sheet metal of the same thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is disclosed in detail with reference to the attached drawings, in which: Fig. 1 shows an axometric view of the metal container according to the utility model; Fig. Figure 2 shows a side wall view of the stamped metal container; Fig. 3 shows an axometric view of the metal cover according to the utility model, intended to close the container; and Fig. 4 a vertical section of the cover of Fig. 3 shows. DETAILED DESCRIPTION OF THE DRAWINGS

[0024] The tubular body of the metal container 1 has a square or rectangular cross-section with rounded corners. The container body has walls 2 and a base 3, which is permanently fixed to the lower edge of the walls 3 by a double-curved external curl (outer (flange) collar bushing) 4, pressed against the walls. A first outwardly projecting reinforcing rib 6 is formed with a clearance below the upper peripheral edge 5 on the container and parallel to it in the walls 2.The tubular body of the container has rounded corners, with an outwardly projecting limiting rib on the circumference of each rounded corner 8, with a free space below the first reinforcing rib 6 and parallel to the upper edge 5, with a free space above the first reinforcing rib 6 and parallel to it there is a second reinforcing rib 7, centrally between the two reinforcing ribs 6 and 7 on the walls 2 on the container are permanently fixed opposite each other two supports 10 on which a fixed handle 11 is mounted.

[0025] The embossed stamping 12 of the metal container 1 is located symmetrically about its four vertical sides. The embossed stamping 12 has a rectangular outline that is equally spaced by a clearance A from the double curved outer curl 4 and the upper peripheral edge 5, as well as from the surrounding rounded edges of the metal container 1. The embossed stamping 12 is centered toward the inside of the 6 mm wide metal container 1. The embossed stamping 12 has an inclined / slanted outline relative to the flat surface outside the embossed stamping 13.

[0026] The metal cover (lid) 9 has a locking plate 1a and a vertical side wall located along its perimeter 2a. The loose end 3a on the side wall 2a is bent outward and downward and equipped with a seal 4a. The shape and size of the locking plate 1a corresponds to the shape and size of the closed container. The locking plate 1a has a central area 5a enclosed by a embossed profile 6a facing downward. To secure the cover to the container in the vertical side wall 2a, there is an outwardly projecting gripping edge 10a, parallel to the loose end 3a on the side wall 2a. The gripping edge 10a extends along the entire perimeter of the side wall 2a and ensures easy placement of the cover in the closed position or easy opening.The outwardly bent loose end 3a has a section 7a curved in a radius, which merges into an inwardly bent spiral section 11a, wherein the seal 4a is placed in the curved section 7a.

[0027] The embossed profile 6a has a square outline and is positioned in the center of the metal cover with radius milling / corner rounding in the four corners. The embossed profile 6a has a lower height than the other elements of the metal cover 9, with a transition between the embossed profile 6a and the rest of the metal cover 9 formed by an inclined / slanted contour. A flat surface 9a is located on the outside of the inclined contour 8a. LIST OF REFERENCE SYMBOLS 1 metal container 2 walls of the metal container 3 Bottom of the metal container 4 double-bent external rolling (outer (flange) collar bushing) 5 upper peripheral edge 6 first reinforcing rib 7 second reinforcing rib 8 outwardly projecting limiting rib 9 Metal cover (lid) 10 fixing supports for the handle of the metal container 11 Metal container handle 12 embossed stamps 13 flat surface outside the embossed stamping 14 inclined / slanted contour 1a locking plate 2a vertical side wall 3a loose end of the side wall 2a 4a Seal 5a central area of ​​the locking plate 1a 6a embossed profile 7a curved radius section 8a inclined contour 9a flat surface of the metal cover 10a Gripping edge 11a inwardly bent spiral section QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] BG 1890 U1

[0002]

Claims

[1] A metal container and cover for the metal container, wherein the metal container (1) comprises a tubular body with walls (2) and a bottom (3) permanently fixed to the lower end of the walls (2) by a double-curved external curl (4), wherein an upper peripheral edge (5) of the container (1) is formed by an outwardly bent upper end of the walls (2) having an outwardly projecting first reinforcing rib (6) parallel to the upper edge (5), wherein the tubular body of the container has rounded corners, wherein an outwardly projecting limiting rib (8) is arranged along the circumference of each rounded corner below the first reinforcing rib (6) and parallel to the upper edge (5), and wherein a second reinforcing rib (7) is arranged above the first reinforcing rib (6) and parallel to it, and wherein, centrally between the two reinforcing ribs (6) and (7),permanently fixed to the walls (2) of the container and opposite each other, two supports (10) are placed, to which a handle (11) is rigidly mounted, and a metal cover (9) with an embossed profile for closing the product container, comprising a closing plate (1a) and a vertical side wall (2a) along its circumference, which has an outwardly and downwardly curved loose end (3a) provided with a seal (4a), and an outwardly projecting gripping edge (10a) formed in the side wall (2a) and parallel to the closed end (3a), wherein the outwardly curved loose end (3a) of the vertical side wall (2a) has a radially curved section (7a) extending into an inwardly curved spiral section (8a), the seal (4a) is placed in the curved section (7a), and the gripping edge (10a) extends along the entire circumference of the side wall (2a) extends, characterized bythat on each of the four side walls of the metal container (1) there is a symmetrically formed 0.5 mm deep embossed stamping (12) with a rectangular outline, and on the closing plate (1a) of the metal cover (9) there is formed a central area (5a) which is covered by a downwardly facing embossed profile (6a). [2] Metal container and cover for the metal container according to claim 1, characterized by an embossed profile (6a) of the metal cover (9) with a square contour, which is positioned in the central area (5a) in the center of the metal cover (9) with a radius milling / corner rounding in the four corners, wherein the embossed profile (6a) has a lower height than the other elements of the metal cover and the transition between the embossed profile (6a) and the rest of the metal cover is formed by an inclined / slanted contour (8a), and a flat surface (9a) is located on the outside of the inclined contour (8a). [3] Metal container and cover for the metal container according to claim 1, characterized by an embossed stamping (12) of the metal container (1) arranged symmetrically to its four vertical sides, with a rectangular outline spaced from the double-curved outer curl (4) pressed against the walls and from the upper peripheral edge (5), and from the surrounding rounded edges of the metal container (1) by a clearance A at the same distance, the embossed stamping (12) being recessed towards the inside of the metal container (1) and being 6 mm wide, and the embossed stamping (12) having an inclined contour (14) relative to the flat surface outside the embossed stamping (13).

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