Patent FR1031659A successfully refreshed from Google Patents.
US4803031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for molding a closure cap
Assignee: Anchor Hocking Packaging Co
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Filing: 1984-03-16
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Granted: 1989-02-07
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Expires: 2004-03-16
Abstract
Abstract An improved molded closure cap is described which has a softer sealing portion and a relatively hard closure engaging portion. The cap is molded using two differing plastics where the container engaging portion is molded of a softer seal-forming plastic and the remaining portion or shell is molded of a harder plastic. The novel molding apparatus and method employ plunger or die movement to facilitate a successive molding of the soft and hard cap portions without changing the molding plunger or die.
Inventors
- 👤 Charles S. Ochs
- 👤 Carl E. Koontz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:35
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0435; B29; B29C; B29C45/00; B29C45/16; B29C45/1635; B29C2045/1637; B29L; B29L2031/00; B29L2031/26; B29L2031/265; B29L2031/56; B29L2031/565; Y; Y10; Y10S; Y10S425/00; Y10S425/005; Y10S425/809
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A method for molding generally cup-shaped plastic closures of one plastic material with interior molded container plastic sealing members of a differing plastic comprising the steps of holding two cooperating molding heads with communicating cavities in one position for injecting a first plastic into a first cavity defining the sealing members only, injecting the first plastic into said first cavity, providing relative movement between the molding heads forming a second cavity communicating with the plastic injected into said first cavity and defining a cup-shaped closure shell and injecting second plastic into the second cavity.
Claim 2
Independent Claim
94 words
A method for molding generally cup-shaped plastic closures of one plastic material with interior molded container plastic sealing members of a differing plastic comprising the steps of holding two cooperating molding heads with communicating cavities in one position for injecting a first plastic into a first cavity defining the sealing members only, injecting the first plastic into said first cavity, providing relative movement between the molding heads forming a second cavity communicating with the plastic injected into said first cavity and defining a cup-shaped closure shell and injecting second plastic into the second cavity.
Claim 3
Dependent Claim
131 words
Apparatus for molding cup-shaped plastic closures of two or more plastic materials with an interior molded plastic elastomeric sealing member of one plastic material and a closure shell of a harder outer plastic material comprising a pair of molding heads each including molding dies, means for holding the heads in one relative position with a first cavity defining the elastomeric sealing member only, a plastic injector nozzle for elastomeric material positioned to communicate with said first cavity, means for moving said molding heads apart to a second position with the molding dies forming a second cavity communicating with said first cavity and defining the cup-shaped closure shells only, and a second plastic injection nozzle positioned to communicate with said second cavity to form the closure shell with an attached sealing member.
Claim 4
Dependent Claim
131 words
Apparatus for molding cup-shaped plastic closures of two or more plastic materials with an interior molded plastic elastomeric sealing member of one plastic material and a closure shell of a harder outer plastic material comprising a pair of molding heads each including molding dies, means for holding the heads in one relative position with a first cavity defining the elastomeric sealing member only, a plastic injector nozzle for elastomeric material positioned to communicate with said first cavity, means for moving said molding heads apart to a second position with the molding dies forming a second cavity communicating with said first cavity and defining the cup-shaped closure shells only, and a second plastic injection nozzle positioned to communicate with said second cavity to form the closure shell with an attached sealing member.
Claim 5
Dependent Claim
31 words
The apparatus as claimed in claim 2 in which one of said molding heads comprises a plunger member and means for rotating and axially moving said plunger from said molding dies.
Claim 6
Dependent Claim
27 words
The apparatus as claimed in claim 2 in which both of said plastic injection nozzles are positioned in one of said molding heads which is fixedly positioned.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |