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
  • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
  • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
  • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
• • 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
  • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
  • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
  • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
  • B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
• • 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
  • B65D2251/00—Details relating to container closures
  • B65D2251/20—Sealing means
  • B65D2251/205—Inserted

Definitions

• This invention relates in general to new and useful improvements in closures for containers, and more particularly to a closure for carbonated beverage containers wherein the closures are formed of plastic material.
• the strengthening ribs are particularly adaptable to be used in combination with plastic closures wherein there is provided a separately formed and usually a flowed-in liner is utilized as a sealing member.
• Such closures have formed on the underside of the end wall thereof an annular pocket or seat for the liner with the pocket or seat being defined by a depending annular rib.
• the rib generally defines the central panel portion of the end wall surrounding the contact between the liner and the bottle neck finish and cooperates with the ribs to strengthen the end wall.
• Figure 1 is a side elevational view of a closure cap formed in accordance with this invention.
• Figure 2 is a horizontal sectional view taken generally along the line 2-2 of Figure 1, and shows the internal details of the closure.
• Figure 3 is a vertical sectional view taken generally along the line 3-3 of Figure 2, and shows specificall the cross section of the closure including the outline of a typical rib.
• Figure 4 is a sectional view similar to Figure 3, and shows a modified rib configuration.
• closure 10 is injection molded of a suitable plastic material and includes an end wall 12 and a depending skirt 14. If desired, the lower edge of the skirt may be reinforced by a thickened rim 16.
• the illustrated closure is intended to be utilized in conjunction with a container neck finish which is external ly threaded, and thus is provided with internal threads 18.
• the underside of the end wall 12 which is within the skirt 14 is provided with an annular liner 20.
• the liner 20, as far as this invention is concerned, may be of any construction but is preferably of the flowed-in type.
• the closure 12 is provided with an annular pocket 22 on the underside of the end wall 12.
• the radially inner and outer edges of the pocket 22 are defined by an annular rib 24.depending from the end wall 12 and the inner surface of the skirt 14.
• the liner 20 has generally pivoted relative to the sealing surface of the container end finish and then, 'when the "domed" central panel portion is flattened by way of a pressure applied against the uppermost surface thereof, there is a deflection of the end wall 12 in the area of the liner such that there is leakage between the liner and the sealing surface of the container which results in a loss of pressure and most particularly carbonation in the event of a carbonated beverage being packaged.
• transverse ribs such as the ribs 28 shown in Figure 2.
• the ribs be radiating ribs and that they intersect at the center of the central panel 26 and extend therefrom to the annular rib 24. While it has been found that six ribs appear to provide the best results, it has also been found that three ribs are the minimum number to minimize "doming" of the end wall 12.
• the ribs 28 are illustrated as being downwardly bowed so as to be of maximum thickness at their points of intersection.
• ribs, such as 'the ribs 28a of Figure 4 may be centrall upwardly bowed so as to be of minimum thickness at their lin intersection.
• rib outlines of Figures 3 and 4 are the preferred outlines, it is also to be understood that the rib can be straight although the sloping configurations are preferred, and while the arcuate sloping configurations are pre ferred straight line sloping configurations have also proven satisfactory. It is to be understood that while the closure 10 primarily suited for use in conjunction with internally pres surized packages, the closure 10 may also be beneficially utilized when the product is packaged under vacuum condition The ribs also prevent the internal deflection of the central panel portion 26 which, under certain conditions, can result in the breaking of the seal between the liner and the container neck finish and the loss of internal vacuum.

Landscapes

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

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=22913838

Family Applications (1)

Country Status (6)

Families Citing this family (20)

Citations (3)

Family Cites Families (1)

• 1981
  • 1981-03-10 US US06/242,197 patent/US4346812A/en not_active Expired - Lifetime
• 1982
  • 1982-03-08 WO PCT/US1982/000275 patent/WO1982003061A1/en not_active Ceased
  • 1982-03-08 JP JP57501318A patent/JPS58500323A/ja active Granted
  • 1982-03-08 DE DE8282901214T patent/DE3270950D1/de not_active Expired
  • 1982-03-08 EP EP82901214A patent/EP0073820B1/en not_active Expired
  • 1982-03-09 CA CA000397948A patent/CA1178246A/en not_active Expired

Patent Citations (3)

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