Container lid with metal shell having decorative embossing

Abstract

To provide a container lid which prevents ornament embossment formed on a top surface wall of a metal shell from being damaged when a synthetic resin liner is formed on an inner surface of the top surface wall.SOLUTION: Ornament embossment 30 arranged on a top surface wall 6 of a metal shell 4 is composed of characters and / or patterns regulated by a recess formed on an outer surface of the top surface wall 6 of the shell 4 inside a pair of scores 14a and 14b.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a container lid having a metal shell on the top wall of which decorative embossments consisting of letters and / or figures are arranged. [Background technology]

[0002] As disclosed in the following Patent Documents 1 and 2, an easily openable container lid for a container made of glass, synthetic resin or metal for soft drinks or alcoholic drinks is provided, which comprises a circular top wall, a skirt wall hanging down from the periphery of the top wall, and a bottom wall extending from the bottom end of the skirt wall. Extend Includes extension pieces, and the top wall and skirt wall have both sides of the extension pieces from Container lids having a metal shell on which a pair of scores are formed, which extend upward along the skirt wall and then arcuately along the peripheral region of the top wall or the boundary region between the top wall and the skirt wall, are widely used. As disclosed in Patent Document 2 listed below, a synthetic resin liner is usually provided on the inner surface of the top wall, and a synthetic resin grip ring is connected to the extension piece. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 64-53724 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-173594 Summary of the Invention [Problem to be solved by the invention]

[0004] Recently, in order to make the appearance of container closures more attractive and to prevent the forgery of container closures for counterfeit products, it has become necessary to form decorative embossments (i.e., decorative recesses and / or protrusions) consisting of letters and / or figures on the top wall of the metal shell. However, it is not necessarily easy to form decorative embossments on the top wall of the metal shell in response to such requirements, and it is important to solve problems such as the formed decorative embossments being damaged when the synthetic resin liner is formed, or the presence of the decorative embossments deteriorating the sealing properties of the synthetic resin liner.

[0005] The present invention has been made in view of the above facts, and its main technical object is to prevent the decorative embossment formed on the top wall from being damaged when the synthetic resin liner is formed, and The sealing properties of the synthetic resin liner are not deteriorated due to the presence of the decorative embossing, and the decorative To provide a new and improved container lid which can easily form a decorative embossment having excellent decorativeness. [Means for solving the problem]

[0009] According to a first aspect of the present invention, there is provided a container lid that achieves the above-mentioned main technical object, comprising: A container lid comprising: a metal shell including a circular top wall, a skirt wall hanging down from the periphery of the top wall, and an extension piece extending from the lower end of the skirt wall, the top wall and the skirt wall having a pair of scores formed on both sides of the extension piece extending upward along the skirt wall and then extending in an arc along the periphery of the top wall or the boundary area between the top wall and the skirt wall; and a synthetic resin liner disposed on the inner surface of the top wall of the shell and having a thin central portion and a thick periphery, a decorative embossment consisting of letters and / or figures defined by recesses is arranged on the outer surface of the top wall of the shell, in a portion inside the pair of scores and corresponding to the central portion of the liner; the depth of the recess is less than the thickness of the central portion of the liner; The outer edge of the recess is inclined at an angle α of 30 to 60 degrees with respect to the central axis of the shell, the upper end of the outer edge of the recess Around the entire circumference located inside the pair of scores and at a position corresponding to the central portion of the liner, A container lid is provided. According to a second aspect of the present invention, there is provided a container lid comprising: a metal shell including a circular top wall, a skirt wall hanging down from the periphery of the top wall, and an extension piece extending from a lower end of the skirt wall, the top wall and the skirt wall having a pair of scores formed thereon, the scores extending upward along the skirt wall from both sides of the extension piece and then extending in an arc along the periphery of the top wall or the boundary region between the top wall and the skirt wall; and a synthetic resin liner disposed on the inner surface of the top wall of the shell and having a thin central portion and a thick periphery, a decorative embossment consisting of letters or letters and figures defined by recesses is arranged on the outer surface of the top wall of the shell, in a portion inside the pair of scores and corresponding to the central portion of the liner; the depth of the recess is less than the thickness of the central portion of the liner; The outer edge of the recess is inclined at an angle α of 30 to 60 degrees relative to the central axis of the shell. A container lid is provided. [Effects of the Invention]

[0011] In the container lid of the present invention, the decorative embossing Is heaven Since the decorative embossing is made up of letters and / or figures defined by recesses formed on the outer surface of the top wall, the decorative embossing will not be damaged when the synthetic resin liner is formed (if the decorative embossing is made up of letters and / or figures defined by protrusions formed on the outer surface of the top wall, the protrusions defining the decorative embossing may be pressed against the base supporting the top wall when the synthetic resin liner is formed, which may damage the decorative embossing). The recesses constituting the decorative embossments are disposed inside the pair of scores on the top wall and at a position corresponding to the center of the liner, and the depth of the recesses is smaller than the thickness of the center of the liner, so that the peripheral seal of the liner is not adversely affected by the formation of the decorative embossments and the sealing properties of the synthetic resin liner are not deteriorated. Since the outer edge of the recess is inclined at an angle α of 30 to 60 degrees with respect to the central axis of the shell, a decorative embossment with excellent decorativeness can be easily formed. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a plan view showing a preferred embodiment of a container lid of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1 . [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 . [Figure 4] 3 is a simplified diagram illustrating a hole forming step in a preferred embodiment of the method for manufacturing a container lid of the present invention. [Figure 5] 3 is a simplified diagram illustrating an embossing step in a preferred embodiment of the method for manufacturing a container lid of the present invention. FIG. [Figure 6] FIG. 2 is a simplified diagram illustrating a score forming step in a preferred embodiment of the method for manufacturing a container lid of the present invention. [Figure 7] 1 is a simplified diagram illustrating a punching and drawing process in a preferred embodiment of the method for manufacturing a container lid of the present invention. [Figure 8] 1 is a simplified diagram illustrating a liner forming step in a preferred embodiment of the method for manufacturing a container lid of the present invention. [Figure 9] 1 is a simplified diagram illustrating a gripping ring forming step in a preferred embodiment of the method for manufacturing a container lid of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, preferred embodiments of the container lid of the present invention will be described in detail with reference to the accompanying drawings.

[0014] 1 to 3 show a preferred embodiment of a container lid constructed according to the present invention. The container lid, generally designated by the numeral 2, is made of a material such as an aluminum-based alloy thin plate, a chromated steel thin plate, or a tinplate thin plate. treeThe metal shell 4 is made of a suitable sheet metal. The shell 4 includes a circular top wall 6, a skirt wall 8 depending from the periphery of the top wall 6, and an extension piece 10 (see FIG. 7) extending from the lower end of the skirt wall 6 at a specific circumferential position. Approximately triangular notches 12a and 12b are formed in the lower end of the skirt wall 8 on both circumferential sides of the extension piece 10. The shell 4 also has a pair of scores 14a and 14b. Each of the scores 14a and 14b extends upward through the skirt wall 8 from the notches 12a and 12b (i.e., from both sides of the extension piece 10) and then extends in an arc through the peripheral region of the top wall 6 and the boundary region between the top wall 6 and the skirt wall 8. Although the scores 14a and 14b can be formed by locally reducing the wall thickness by applying a tool to the outer surface of the shell 4, it is more convenient to form them by locally reducing the wall thickness by applying a tool to the inner surface of the shell 4 (thus forming grooves on the inner surface of the shell 4). A pair of holes 16 are formed at the tip of the extension piece 10 (see Figure 7).

[0015] A synthetic resin liner 18 made of an appropriate synthetic resin such as soft polyethylene is disposed on the inner surface of the top wall 6 of the shell 4. The liner 18, which is generally disk-shaped, has a relatively thin central portion 20 and a relatively thick peripheral seal portion 22. The peripheral seal portion 22 is formed with a pair of downwardly protruding annular seals, namely, an inner annular seal 24 and an outer annular seal 26. A gripping ring 28 made of an appropriate synthetic resin such as polypropylene or polyethylene is connected to the tip of the extension piece 10. If desired, the formation of the synthetic resin gripping ring 28 can be omitted, and the extension piece 10 of the metal shell 4 itself can be formed into a gripping ring shape having the required dimensions.

[0016] The above-described configuration of the illustrated container lid 2 is well known to those skilled in the art, and therefore detailed description thereof will be omitted.

[0017] In the container lid 2 constructed according to the present invention, a decorative embossment 30 consisting of letters and / or figures is arranged on the top wall 6 of the shell 4, more specifically, on the area inside the pair of scores 14a and 14b on the top wall 6 of the shell 4. The letters and / or figures constituting the decorative embossment 30 are arranged on the top wall 6 It is important that the decorative embossment 30 is defined by a recess formed on the outer surface of the top wall 6. formed The decorative embossing 30 is made up of an N-shaped recess. As can be clearly understood by referring to FIG. 2, the outer edge of the recess that constitutes the decorative embossing 30 is inclined at an angle α of 30 to 60 degrees with respect to the central axis of the shell 4 in order to facilitate molding and improve decorativeness. It is important to Furthermore, in order to reliably prevent the formation of the decorative embossing 30 from impairing the sealing effect of the synthetic resin liner 18 on the container opening and neck, it is preferable that the recess defining the decorative embossing 30 is formed in a portion of the top wall 6 corresponding to the central portion 20 of the synthetic resin liner 18, and that the depth d of the recess is smaller than the thickness t of the central portion 20 of the synthetic resin liner 18. If the decorative embossing is formed from a protrusion formed on the outer surface of the top wall 6, there is a risk that the decorative embossing 30 will be damaged when the synthetic resin liner 18 is formed on the inner surface of the top wall 6, as will be further described later.

[0018] Next, a preferred embodiment for manufacturing the container lid 2 as described above will be described.

[0019] Hole formation process Referring to FIG. 4, first, a metal sheet 32 ​​for forming the shell 4 is prepared. This metal sheet 32 ​​may be an aluminum-based alloy sheet, a chromated steel sheet, or a tinplate sheet. In the case of an aluminum-based alloy sheet, the thickness is preferably about 0.15 to 0.25 mm. A suitable protective coating or colored paint, which is well known per se, may be applied to the front and back surfaces of the metal sheet 32. In the illustrated embodiment, a pair of holes 16 are formed in required locations in the metal sheet 32. If desired, the formation of the holes 16 may be performed at an appropriate time after the embossing step described below and before the punching and drawing steps.

[0020] Embossing process 5, recesses that define the letters and / or figures that make up the decorative embossing 30 are formed at predetermined positions on the metal sheet 32. These recesses can be formed by applying a processing tool having a tip shape that corresponds to the recesses to the surface of the metal sheet 32 ​​that is placed on a support base (not shown).

[0021] Score formation process 6, a pair of scores 14a and 14b are formed at predetermined positions in the sheet metal 32. The scores 14a and 14b are preferably formed by using a tool to form grooves on the back surface of the sheet metal 32 (thus, the scores 14a and 14b are defined by forming grooves on the inner surface of the top wall 6 of the metal shell 4 to locally reduce the thickness). The score-forming step is preferably performed after the embossing step and before the punching and drawing steps described below. According to the inventors' experience, if the embossing step is performed after the scores 14a and 14b are formed, the previously formed scores 14a and 14b tend to be damaged (i.e., adversely affected) and deteriorated (i.e., partially damaged or excessively weakened) by forming the recesses.

[0022] Punching and drawing process Following the score forming step, a punching and drawing step is carried out. In this punching and drawing step, as shown in Figure 7, the sheet metal 32 is punched and drawn to complete the shell 4. The punching and drawing steps can be carried out substantially simultaneously, or the punching step can be carried out first and then the drawing step.

[0023] Liner forming process Next, as shown in FIG. 8 , a liner-forming process is performed to form a synthetic resin liner 18 on the inner surface of the top wall 6 of the shell 4. In this liner-forming process, the shell 4 is placed in an inverted position (i.e., with the outer surface of the top wall 6 in contact with the support base) on a support base (not shown). A softened or molten synthetic resin material is then supplied to the inner surface of the top wall 6, and an embossing tool is applied to the synthetic resin material to form the synthetic resin liner 18. During this process, the recesses defining the letters and / or figures constituting the decorative embossments 30 do not come into contact with the support base, and therefore the decorative embossments are not damaged. If the letters and / or figures constituting the decorative embossments 30 are made up of protrusions, molding pressure is applied while the protrusions are in contact with the support base, which could damage the decorative embossments 30.

[0024] Ring forming process In the illustrated embodiment, after the liner forming step, a ring forming step is performed as shown in Fig. 9. In this ring forming step, a gripping ring 28 is formed by compression or injection molding using the extension piece 10 of the shell 4 as a core, and the gripping ring 28 is connected to the tip of the extension piece 10, thus completing the container lid 2. If desired, the ring forming step can be performed after the punching and drawing step and before the liner forming step.

[0025] The above explanation has been given for the production of one shell 4, but in actual industrial production, a relatively large sheet metal is prepared, and the processes of hole-forming, embossing, scoring, and punching and drawing are carried out simultaneously and in sequence at multiple locations on the sheet metal, thereby forming multiple shells 4 at the same time.

[0026] The above-mentioned hole-forming, score-forming, punching and drawing, liner-forming, and ring-forming processes are well known to those skilled in the art, and therefore detailed explanations of these processes will be omitted in this specification.Furthermore, the manner of using the container closure 2 constructed according to the present invention, i.e., the manner of attaching it to the container neck to seal the container neck and the manner of detaching it from the container neck to open the container neck, are also well known, and therefore explanations thereof will be omitted in this specification. [Explanation of symbols]

[0027] 2: Container lid 4: Metal shell 6: Top wall 8: Skirt wall 10: Extension piece 12a: Notch 12b: Notch 14a:Score 14b:Score 16: Hole 18: Synthetic resin liner 20: Center of synthetic resin liner 22: Peripheral seal of synthetic resin liner 24: Inner annular seal 26: Outer annular seal 28: Gripping ring 30: Decorative embossing 32: Metal thin plate

Claims

1. A container lid comprising: a metal shell including a circular top wall, a skirt wall hanging down from the periphery of the top wall, and an extension piece extending from the lower end of the skirt wall, the top wall and the skirt wall having a pair of scores formed on both sides of the extension piece extending upward along the skirt wall and then extending in an arc along the periphery of the top wall or the boundary area between the top wall and the skirt wall; and a synthetic resin liner disposed on the inner surface of the top wall of the shell and having a thin central portion and a thick periphery, a decorative embossment consisting of letters and / or figures defined by recesses is arranged on the outer surface of the top wall of the shell, in a portion inside the pair of scores and corresponding to the central portion of the liner; the depth of the recess is less than the thickness of the central portion of the liner; The outer edge of the recess is inclined at an angle α of 30 to 60 degrees with respect to the central axis of the shell, the upper end of the outer edge of the recess is located inside the pair of scores over the entire periphery and at a position corresponding to the center of the liner; A container lid characterized by:

2. A container lid comprising: a metal shell including a circular top wall, a skirt wall hanging down from the periphery of the top wall, and an extension piece extending from the lower end of the skirt wall, the top wall and the skirt wall having a pair of scores formed on both sides of the extension piece extending upward along the skirt wall and then extending in an arc along the periphery of the top wall or the boundary area between the top wall and the skirt wall; and a synthetic resin liner disposed on the inner surface of the top wall of the shell and having a thin central portion and a thick periphery, a decorative embossment consisting of letters or letters and figures defined by recesses is arranged on the outer surface of the top wall of the shell, in a portion inside the pair of scores and corresponding to the central portion of the liner; the depth of the recess is less than the thickness of the central portion of the liner; The outer edge of the recess is inclined at an angle α of 30 to 60 degrees relative to the central axis of the shell. A container lid characterized by:

Images