US4748735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing tamper evident composite closure
Assignee: Anchor Hocking Packaging Co
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Filing: 1987-03-27
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Granted: 1988-06-07
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Expires: 2007-03-27
Abstract
Abstract An improved composite closure is described which includes a cover portion and a molded plastic ring portion. The plastic ring portion is molded by a new method with top tool core removal which permits formation of inwardly directed tabs or fishhooks on the tamper evident ring. The molded ring also permits the cover to be inserted from the top of the ring rather than upwardly over the ring threads, which is an easier and faster method of assembling a composite closure.
Inventors
- 👤 Thomas H. Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:13
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/34; B65D41/3461; B65D41/3466; B65D41/3423; B65D41/3428; B65D51/00; B65D51/14; B65D51/145; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
In the method of making and assembling a composite closure which includes the steps of forming a disk cover, molding a plastic ring, and inserting said disk cover into engagement with said plastic ring the improvement comprising: molding said ring on a top tool core removal mold, said ring having an with its upper and inner edge having a diameter slightly less than the diameter of the disk cover, said ring having forming a cover receiving groove in the ring below said upper and inner edge, forming said ring having a tamper indicating band on the lower portion of said ring with a container tab engaging means extending inwardly from the lower edge of the band, and removing said plastic ring from said top tool core removal mold by stripping the molded ring from the mold with the tab end being first removed and the upper edge of the ring being last removed.
Claim 2
Dependent Claim
153 words
In the method of making and assembling a composite closure which includes the steps of forming a disk cover, molding a plastic ring, and inserting said disk cover into engagement with said plastic ring the improvement comprising: molding said ring on a top tool core removal mold, said ring having an with its upper and inner edge having a diameter slightly less than the diameter of the disk cover, said ring having forming a cover receiving groove in the ring below said upper and inner edge, forming said ring having a tamper indicating band on the lower portion of said ring with a container tab engaging means extending inwardly from the lower edge of the band, and removing said plastic ring from said top tool core removal mold by stripping the molded ring from the mold with the tab end being first removed and the upper edge of the ring being last removed.
Claim 3
Dependent Claim
30 words
The method as claimed in claim 1 in which said upper and inner edge is formed with a bevel for assisting in the insertion of the cover in said groove.
Claim 4
Dependent Claim
19 words
The method as claimed in claim 1 which further comprises cutting a circular line of weakness defining said band.
Claim 5
Dependent Claim
23 words
The method as claimed in claim 1 which further comprises inserting said cover into said ring from the edge opposite to said band.
Claim 6
Dependent Claim
28 words
The method as claimed in claim 3 in which said line is cut from the inside toward the outside of said band forming an obviously unbroken whitened line.
Claim 7
Dependent Claim
20 words
The method as claimed in claim 1 in which said molding is performed in a mold having a wedge core.
Claim 8
Dependent Claim
21 words
The method as claimed in claim 1 in which the tamper indicating band tab engaging means in inwardly projecting shrink band.
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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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |