CONTAINER SEALING DEVICE

• US 20150353247A1
• Filed: 01/24/2014
• Published: 12/10/2015
• Est. Priority Date: 01/25/2013
• Status: Active Grant

• Current Assignee: Tokan Kogyo Company Limited (Toyo Seikan Group Holdings, Ltd.)
• Original Assignee: Tokan Kogyo Company Limited (Toyo Seikan Group Holdings, Ltd.)
• Inventors: Isogai, Takamitsu
• Granted Patent: US 9,963,263 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B65D 1/0246 Closure retaining means, e.g. beads, screw-threads
• CPC Class Codes: B65D 2251/0015 of the 41-type
• CPC Class Codes: B65D 2251/0031 Membrane
• CPC Class Codes: B65D 47/106 with devices for removing frangible parts of the pouring element or of its closure
• CPC Class Codes: B65D 47/123 with internal parts
• CPC Class Codes: B65D 5/746 Spouts formed separately from the container
• CPC Class Codes: B65D 51/228 a major part of the inner closure being removed from the container after the opening
• CPC Class Codes: F16B 33/02 Shape of thread; Special thread-forms F16B25/00 takes precedence; used to remove paint or dirt layers F16B35/007, F16B37/002; used as screw-locking device F16B39/30

Abstract

The sealing device 100 of a container 1 is provided with an inner plug 10 and an upper closure 20. The inner plug 10 has a separation part 12 for forming an opening by separation. A first screwing part 51 for attachment of the upper closure 20 is provided between the inner plug 10 and the upper closure 20. The upper closure 20 has an inner cylinder part 20c which is a support part catching a separation part 12 by a second screwing part 52 in opening the plug and separating the separation part 12 from the inner plug 10. The second screwing part 52 is in a reverse thread relation with respect to the first screwing part 51 and has a barb-shape which facilitates pushing the separation part 12 into the inner cylinder part 20c rather than withdrawing the separation part from the inner cylinder part 20c.

Claims

1. A container sealing device provided with an inner plug and an upper closure and enabling attachment and detachment of the upper closure by a first screwing part provided between the inner plug or the container and the upper closure, wherein:

the upper closure has a support part catching a separation part provided in the inner plug by a second screwing part in opening the plug and separating the separation part from the inner plug; and

the second screwing part is in a reverse thread relation with respect to the first screwing part and has a barb-shaped protrusion which facilitates pushing the separation part into the support part rather than withdrawing the separation part from the support part.

2. The container sealing device according to claim 1, wherein:

the inner plug has a body part and the separation part that forms an opening by being separated from the body part, and

the upper closure is attached to the container so as to cover the inner plug.

3. The container sealing device according to claim 1, wherein the protrusion is a thread having a cross-section biased to an anti-screwing direction along an axial center of the inner plug on a tip end side.

4. The container sealing device according to claim 3, wherein the second screwing part has a set of protrusions each having an engagement surface inclined toward the anti-screwing direction and having a thickness of a tip end part being smaller than a thickness of a base part.

5. The container sealing device according to claim 4, wherein:

the support part has a first inner cylinder part extending downward from a lower surface of a ceiling wall of the upper closure;

the separation part has a second inner cylinder part extending upward from a sealing body connected to the body part of the inner plug and surrounding the first inner cylinder part from a periphery; and

the second screwing part has a male thread formed on an outer side surface of the first inner cylinder part of the support part and a female thread formed on an inner side surface of the second inner cylinder part of the separation part.

6. The container sealing device according to claim 1, wherein a stopper regulating a mutual assembling interval is provided between the separation part of the inner plug and the upper closure.

7. The container sealing device according to claim 6, wherein the stopper is provided at least at either one of a lower end of the support part and an upper end of the second inner cylinder part extending upward from the sealing body provided on the separation part.

8. The container sealing device according to claim 1, wherein a score is provided between the body part of the inner plug and the separation part.