US3701330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and tool for forming a score
Assignee: Primerica Inc
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Filing: 1971-03-25
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Granted: 1972-10-31
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Expires: 1991-03-25
Abstract
Abstract A score having improved abuse and fatigue resistance qualities is formed by using a scoring punch which is specially profiled to obtain a smooth continuous flow of the displaced metal, thereby eliminating the ''''dead zone'''' of compressed, work-hardened metal which exists at the base of conventional scores.
Inventors
- 👤 Christian F Kinkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:42
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/383; B21D28/00; B21D28/02; B21D28/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
A scoring punch for forming a score in a metal article, comprising: a generally flat bottom wall having a width within the range of about 0.002 to 0.004 inch; side walls which are, oppositely and equilaterally, steeply inclined outwardly from the ends of said bottom wall; and corners of intersection between said bottom wall and said side walls which are uniformly rounded off to a radius within the range of about 0.0015 to 0.0025 inches.
Claim 2
Dependent Claim
75 words
A scoring punch for forming a score in a metal article, comprising: a generally flat bottom wall having a width within the range of about 0.002 to 0.004 inch; side walls which are, oppositely and equilaterally, steeply inclined outwardly from the ends of said bottom wall; and corners of intersection between said bottom wall and said side walls which are uniformly rounded off to a radius within the range of about 0.0015 to 0.0025 inches.
Claim 3
Dependent Claim
23 words
The scoring punch, according to claim 1, wherein: said bottom wall between said rounded corners of intersection is about 0.002 inch in width.
Claim 4
Dependent Claim
22 words
The scoring punch, according to claim 1, wherein: said corners of intersection are rounded off to a radius of about 0.002 inch.
Claim 5
Dependent Claim
24 words
The scoring punch, according to claim 1, wherein: said side walls together form an included angle within the range of about 80* to 100*.
Claim 6
Dependent Claim
68 words
A scoring punch for forming a score in a metal component of a container, comprising: a generally flat bottom wall having a width of about 0.002 inch; side walls which are, oppositely and equilaterally, steeply inclined outwardly from the ends of said bottom wall; and corners of intersection between said bottom wall and said side walls which are uniformly rounded off to a radius of about 0.002 inch.
Claim 7
Dependent Claim
68 words
A scoring punch for forming a score in a metal component of a container, comprising: a generally flat bottom wall having a width of about 0.002 inch; side walls which are, oppositely and equilaterally, steeply inclined outwardly from the ends of said bottom wall; and corners of intersection between said bottom wall and said side walls which are uniformly rounded off to a radius of about 0.002 inch.
Claim 8
Independent Claim
182 words
A method of forming a score in a metal component of a container, said score defining a removable section within said component and the residual metal of said component beneath said score having a thickness within a predetermined range which allows for fracturing of said residual metal in order to remove said removable section from said component, comprising the step of: impressing a scoring punch, having a generally flat bottom wall of a width within the range of about 0.002 to 0.004 inch, side walls which are, oppositely and equilaterally, steeply inclined outwardly from the ends of said bottom wall, and corners of intersection between said bottom wall and said side walls which are uniformly rounded off to a radius within the range of about 0.0015 to 0.0025 inch, into the metal component to cause the metal of said component to flow free away from beneath said punch to form the score with the residual metal of said component beneath said score having a granular structure which is continuous and homogeneous with that of the metal in adjacent areas of said component.
Claim 9
Independent Claim
182 words
A method of forming a score in a metal component of a container, said score defining a removable section within said component and the residual metal of said component beneath said score having a thickness within a predetermined range which allows for fracturing of said residual metal in order to remove said removable section from said component, comprising the step of: impressing a scoring punch, having a generally flat bottom wall of a width within the range of about 0.002 to 0.004 inch, side walls which are, oppositely and equilaterally, steeply inclined outwardly from the ends of said bottom wall, and corners of intersection between said bottom wall and said side walls which are uniformly rounded off to a radius within the range of about 0.0015 to 0.0025 inch, into the metal component to cause the metal of said component to flow free away from beneath said punch to form the score with the residual metal of said component beneath said score having a granular structure which is continuous and homogeneous with that of the metal in adjacent areas of said component.
Claim 10
Dependent Claim
37 words
A method of forming a score in a metal component of a container, according to claim 6, wherein: said side walls of said punch together form an included angle within the range of about 80* to 100*.
Claim 11
Independent Claim
196 words
A method of forming a score in a metal component of a container, said component having a metal stock thickness within the range of about 0.008 to 0.015 inch, said score defining a removable section within said component and the residual metal of said component beneath said score having a thickness within the range of about 0.003 to 0.006 inch which allows for fracturing of said residual metal in order to remove said removable section from said component, comprising the step of: impressing a scoring punch, having a generally flat bottom wall of a width of about 0.002 inch, side walls which are oppositely and equilaterally, steeply inclined outwardly from the ends of said bottom wall, and corners of intersection between said bottom wall and said side walls which are uniformly rounded off to a radius of about 0.002 inch, into the metal stock of the component to cause the metal of said component to flow free away from beneath said punch to form the score with the residual metal of said component beneath said score having a granular structure which is continuous and homogeneous with that of the metal in adjacent areas of said component.
Claim 12
Independent Claim
196 words
A method of forming a score in a metal component of a container, said component having a metal stock thickness within the range of about 0.008 to 0.015 inch, said score defining a removable section within said component and the residual metal of said component beneath said score having a thickness within the range of about 0.003 to 0.006 inch which allows for fracturing of said residual metal in order to remove said removable section from said component, comprising the step of: impressing a scoring punch, having a generally flat bottom wall of a width of about 0.002 inch, side walls which are oppositely and equilaterally, steeply inclined outwardly from the ends of said bottom wall, and corners of intersection between said bottom wall and said side walls which are uniformly rounded off to a radius of about 0.002 inch, into the metal stock of the component to cause the metal of said component to flow free away from beneath said punch to form the score with the residual metal of said component beneath said score having a granular structure which is continuous and homogeneous with that of the metal in adjacent areas of said component.
Claim 13
Dependent Claim
37 words
A method of forming a score in a metal component of a container, according to claim 8, wherein: said side walls of said punch together form an included angle within the range of about 80* to 100*.
References Cited (Backward Citations)
US826601A
Cited
US3411470A
Cited
US3338199A
Cited
US3366086A
Cited
US3500939A
Cited
US3583348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |