US3469430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Edge contouring of metal strip and metal strip product
Assignee: American Brass Co
•
Filing: 1967-09-15
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Granted: 1969-09-30
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Expires: 1987-09-15
Abstract
No abstract record available.
Inventors
- 👤 Robert S Bray
- 👤 Luis J Lozano
- 👤 Peter J Kabelka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:03
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0294; B; B21; B21C; B21C37/00; B21C37/02; B21D; B21D19/00; B21D19/005; C21D2221/00; C21D2221/02; C21D8/0247
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A method of rounding’ the edge of metal strip com- prising passing the strip through a heat source and melt- ing. the edge of the metal to a liquid state, removing the metal strip from the heat source before the force of gravity acting on the volume of liquid metal exceeds the surface tension force acting on the liquid metal and hold- ing it in a rounded cross-sectional edge. configuration and solidifying the edge by cooling so that it retains its rounded edge configuration characterized by long colum- nar grains extending laterally outward in the plane of the ‘strip along that edge portion of the strip which had been melted to the liquid state.
Claim 2
Independent Claim
114 words
A method of rounding’ the edge of metal strip com- prising passing the strip through a heat source and melt- ing. the edge of the metal to a liquid state, removing the metal strip from the heat source before the force of gravity acting on the volume of liquid metal exceeds the surface tension force acting on the liquid metal and hold- ing it in a rounded cross-sectional edge. configuration and solidifying the edge by cooling so that it retains its rounded edge configuration characterized by long colum- nar grains extending laterally outward in the plane of the ‘strip along that edge portion of the strip which had been melted to the liquid state.
Claim 3
Dependent Claim
32 words
A method according to claim 1 in which the rounded edge is semi-circular in cross-section and has a radius of ciirvature equal to about one-half the thickness of the metal strip. .
Claim 4
Dependent Claim
23 words
A method according to claim 1 wherein refinement of the contour of the edges after heating is effected by a gentle rolling operation.
Claim 5
Dependent Claim
17 words
A method according to claim 1 wherein both edges of the strip are processed simultaneously. oo 4.
Claim 6
Dependent Claim
41 words
A flat metal strip produced according to the method of claim 1 having rounded edges which are characterized by long columnar grains ‘extending laterally outward in the plane of the strip along the curved segment at the edge of the strip.
Claim 7
Dependent Claim
70 words
A strip according to claim 5 in which the radius of curvature in cross-section of the rounded edges is equal to that of one-half the thickness of the metal strip. References Cited UNITED. STATES PATENTS 3,241,938 3/1966 Michalik o_o ___ 65—182 3,323,342 6/1967 Baker ooo 72—200 3,351,447 11/1967 Lawrenson —_.-——_____ 65-—182 11/1968 De Lajarte ooo 65—182 3,409,423 CHARLES W. LANHAM, Primary Examiner E. M. COMBS, Assistant Examiner US.CLXR. 72364; 266—3
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |