Molded fluoropolymer breadseal with compliant material

Patent metadata

Field	Value
Publication number	US-2017210519-A1
Application number	US-201515328297-A
Country	US
Kind code	A1
Filing date	Jul 21, 2015
Priority date	Jul 22, 2014
Publication date	Jul 27, 2017
Grant date	—

Abstract

A breakseal providing desired compliance characteristics for a reliable seal between the fitment of a liquid dispenser and the breakseal. A compliant material is provided on the non-wetted face of the breakseal, enabling compliance of the breakseal on a wetted face for sealing between the breakseal and the mating component. The breakseal may also include raised features on segments that are separated after rupturing that prevent or mitigate scoring of O-ring seals upon probe insertion. A wiping feature that provides redundant sealing between the breakseal and a mating cap or other mating connection may also be incorporated into the breakseal. The breakseal can also include a flat on an outer perimeter that may serve as a gate for injection molding, so that any gate vestige from the molding process will not protrude beyond the outer diameter of the breakseal to cause unwanted interference between the breakseal and the mating connection.

First claim

What is claimed is:

1 - 14 . (canceled)

15 . A molded breakseal comprising:
an outer rim portion and a central seal portion, both concentric about a central axis, said outer rim portion defining an outer edge; an inner circular rib disposed at a junction between said outer rim portion and said central seal portion, said inner circular rib extending from a non-wetted face of said breakseal in a first direction parallel to said central axis, said inner circular rib including an interior surface facing said central axis and an exterior surface facing away from said central axis; and a plurality of score grooves defining an axial depth into said central seal portion, such that the central seal portion is configured to rupture generally uniformly on application of a force thereon above a predetermined threshold force.

16 . The molded breakseal of claim 15 , comprising an outer rib extending from said outer edge of said breakseal in said first direction parallel to said central axis.

17 . The molded breakseal of claim 16 , wherein said outer rib is continuous

18 . The molded breakseal of claim 17 , wherein said outer rib defines a flat over a portion thereof.

19 . The molded breakseal of claim 15 , comprising at least one circular intermediate rib concentric about said central axis and disposed radially outward from said inner circular rib and radially inward from said outer edge, said at least one circular intermediate rib extending from said non-wetted face of said breakseal in said first direction parallel to said central axis.

20 . The molded breakseal of claim 19 , wherein said inner circular rib extends further in said first direction parallel to said central axis than said at least one circular intermediate rib.

21 . The molded breakseal of claim 19 , wherein said at least one circular intermediate rib comprises a first intermediate rib and a second intermediate rib, said second intermediate rib being disposed radially outward from said first intermediate rib to define a channel therebetween on said non-wetted face.

22 . The molded breakseal of claim 21 , wherein said first intermediate rib, said second intermediate rib, and said channel are continuous.

23 . The molded breakseal of claim 21 , further comprising a compliant material disposed in said channel.

24 . The molded breakseal of claim 22 , wherein said compliant material is an O-ring.

25 . The molded breakseal of claim 23 , wherein said compliant material is one of a perfluoroelastomer polymer and an ethylene propylene diene monomer.

26 . The molded breakseal of claim 15 , wherein said breakseal is formed from perfluoroalkoxy (PFA).

27 - 38 . (canceled)

39 . A container system, comprising:
a fitment including a body portion defining an access port and having a continuous raised face concentric about a port axis of said access port; a molded breakseal, comprising: an outer rim portion and a central seal portion, both concentric about a central axis, said outer rim portion defining an outer edge; an inner circular rib disposed at a junction between said outer rim portion and said central seal portion, said inner circular rib extending from a non-wetted face of said breakseal in a first direction parallel to said central axis; an outer circular rib disposed at said outer rim portion and extending from said non-wetted face of said breakseal in said first direction parallel to said central axis, wherein said inner circular rib, said outer circular rib, and said outer rim portion cooperate to define a channel; and a plurality of score grooves formed on said central seal portion; wherein said central axis of said molded breakseal is in substantial alignment with said port axis of said access port, said raised face defining a contact radius that contacts a wetted face of said molded breakseal in alignment with the continuous annular channel; and a compliant material disposed in said channel of said molded breakseal.

40 . The container system of claim 39 , comprising a liner attached to said fitment.

41 . The container system of claim 40 , wherein said liner is configured to contain a photoresist.

42 . The container system of claim 39 , comprising an overpack including a neck portion defining an opening, said fitment being disposed in said neck portion.

43 . The container system of claim 42 , comprising a cap detachably coupled to said neck portion, said cap securing said molded breakseal.

44 . The container system of claim 43 , wherein:
said outer rim portion of said molded breakseal defines a flexible centering structure that extends radially beyond said outer circular rib to said outer edge; said cap defines a recess having an outer wall, said outer wall being sized to accommodate the outer rim portion of said flexible centering structure with a light interference fit.

45 . The container system of claim 44 , wherein said cap includes a tear tab.

46 . (canceled)

47 . The container system of claim 39 , comprising a plurality of raised features on said non-wetted face of said breakseal proximate said score grooves.

48 - 51 . (canceled)

Assignees

• Advanced Tech Materials

Inventors

• Ware Donald D
• Nelson Greg
• Koland Amy
• Musolf Bruce
• Allen Michael
• Leyes John
• Linder James
• Wilson Richard L
• Richter Royce
• Brosch Brenna

Classifications

• B65D47/36 Primary

  Closures with frangible parts adapted to be pierced, torn or removed, to provide discharge openings (caps with pierceable membranes B65D41/20, B65D41/50; arrangements of closures with protective outer cap-like covers or of two or more co-operating closures B65D51/18) · CPC title

• B65D81/30

  by excluding light or other outside radiation (wrappers B65D65/16) · CPC title

• B65D41/32

  Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings · CPC title

• B65D53/02

  Collars or rings · CPC title

• B65D1/0246

  Closure retaining means, e.g. beads, screw-threads · CPC title