Patent US3898944A successfully refreshed from Google Patents.
US3898944A
Expired / Lapsed
US
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Score and tool for forming the score
Assignee: Continental Can Co Inc
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Filing: 1973-06-18
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Granted: 1975-08-12
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Expires: 1993-06-18
Abstract
Abstract A score having improved anti-fracture characteristics formed by a scoring punch including inclined sides merging at a flat bottom face. At least one of the sides is formed with a horizontal ledge parallel to the flat scoring face and located in vertical spaced relation from the face.
Inventors
- 👤 Jr Albert J Holk
- 👤 Jerry D Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:33
CPC Classifications
B; B21; B21D; B21D17/00; B21D17/02; B21D51/00; B21D51/16; B21D51/38; B21D51/383
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
41 words
A score formed in sheet of metal comprising a bottom wall, a pair of inclined side walls extending from said bottom wall, and a ledge disposed intermediate the length of at least one of said side walls and interrupting the same.
Claim 2
Dependent Claim
41 words
A score formed in sheet of metal comprising a bottom wall, a pair of inclined side walls extending from said bottom wall, and a ledge disposed intermediate the length of at least one of said side walls and interrupting the same.
Claim 3
Dependent Claim
16 words
A score as defined in claim 1 wherein a ledge interrupts each of said side walls.
Claim 4
Dependent Claim
18 words
The invention of claim 1 wherein said sheet of metal is a panel of a container end closure.
Claim 5
Dependent Claim
21 words
The invention of claim 1 wherein the incline of said one side wall is the same below and above said ledge.
Claim 6
Dependent Claim
15 words
The invention of claim 1 wherein said ledge is substantially parallel to said bottom wall.
Claim 7
Dependent Claim
21 words
The invention of claim 1 wherein said ledge is of a width approximately 3 times the width of said bottom wall.
Claim 8
Dependent Claim
16 words
The invention of claim 1 wherein said ledge is of a width of about 0.006 inch.
Claim 9
Dependent Claim
22 words
The invention of claim 1 wherein said ledge and an upper part of said one side wall defines an anti-fracture score portion.
References Cited (Backward Citations)
US3583348A
Cited
US3728980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |