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US3775791A
Expired / Lapsed
US
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Method of making pierce nuts in strip form
Assignee: MacLean Fogg Lock Nut Co
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Filing: 1972-04-13
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Granted: 1973-12-04
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Expires: 1992-04-13
Abstract
Abstract A strip containing a series of flanged pierce nuts connected by flexible and severable sections for use in automatically applying flanged pierce nuts to a panel. The method of forming the strip is also disclosed and comprises providing a blank strip formed with opposed laterally extending flanges, perforating the strip between the flanges, and then slotting the strip between adjacent perforations to form the nut body, after which the sides of the strips are straightened, the holes are threaded and the strip coiled into predetermined lengths. Further, there is disclosed the method of applying pierce nuts from such strip to a panel.
Inventors
- 👤 W Grube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:29
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/24; B21K; B21K1/00; B21K1/64; B21K1/70; B21K1/702; B21K25/00; B23; B23P; B23P19/00; B23P19/04; B23P19/06; B23P19/062; F; F16; F16B; F16B27/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
The method of forming a plurality of flanged nuts connected together by relatively thin severable sections, said method comprising providing a relatively inflexible continuous metal blank for forming a plurality of spaced nut bodies, said blank having a thickness of substantially that of the finished nuts, forming a flange extending laterally and longitudinally of the blank and of a lesser thickness than the nut body, perforating the thicker portion of said blank with a series of spaced holes, punching material transversely out of the thicker portion of the blank and entirely across said thicker portion, between said holes to form from said flange a flexible connector between spaced nut bodies, and forming threads in said holes.
Claim 2
Independent Claim
116 words
The method of forming a plurality of flanged nuts connected together by relatively thin severable sections, said method comprising providing a relatively inflexible continuous metal blank for forming a plurality of spaced nut bodies, said blank having a thickness of substantially that of the finished nuts, forming a flange extending laterally and longitudinally of the blank and of a lesser thickness than the nut body, perforating the thicker portion of said blank with a series of spaced holes, punching material transversely out of the thicker portion of the blank and entirely across said thicker portion, between said holes to form from said flange a flexible connector between spaced nut bodies, and forming threads in said holes.
Claim 3
Dependent Claim
26 words
The method as described in claim 1 and including providing a second flange in this strip, said flanges being disposed on opposite sides of said strip.
Claim 4
Dependent Claim
35 words
The method as described in claim 2, said step of removing metal between said holes to form transverse slots in said strip between adjacent holes comprising forming said slot between the first and second flanges.
Claim 5
Dependent Claim
60 words
The method as described in claim 1, said step of perforating said strip with a series of spaced holes causing the side of the strip adjacent thE flange to move laterally toward said flange, said method comprising the further step of straightening the sides of said strip at the flanges after the holes have been formed by the perforating step.
Claim 6
Dependent Claim
24 words
The method as described in claim 1, and including the further step of straightening the strip prior to the step of perforating holes therein.
Claim 7
Dependent Claim
117 words
The method as described in claim 1, including the further steps of forming a second flange in the strip, said flanges being disposed on opposite sides of said strip, straightening the strip between rollers, said step of removing metal between said holes to form transverse slots in said strip between adjacent holes comprising forming said slot between the first and second flanges and extending into said first and second flanges, straightening the sides of said strip at the flanges after the holes have been formed by the perforating step, forming threads in said holes, forming said strip into a coil by bending said strip at the thin severable sections, and cutting off said coil from said strip.
Claim 8
Dependent Claim
67 words
The method of forming a plurality of flanged nuts connected together by relatively thin severable sections as defined in claim 5, said step of punching material out of the thicker portion of the blank including simultaneously punching material out of the flange to form from said flange a relatively flexible connector between said spaced nut bodies of less cross-sectional area than the cross-sectional area of the flange.
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |