US4344342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of washers and the like
Assignee: SAM GARVIN & COMPANY A CORP OF ILL
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Filing: 1980-08-27
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Granted: 1982-08-17
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Expires: 2000-08-27
Abstract
Abstract A method of producing washers and the like from a strip of sheet material having at least one straight edge, in which scrap generation is minimized.
Inventors
- 👤 George R. Garvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:35
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/06; Y; Y10; Y10S; Y10S83/00; Y10S83/917; Y10T; Y10T83/00; Y10T83/04; Y10T83/0524; Y10T83/0538; Y10T83/0548; Y10T83/0553; Y10T83/0572; Y10T83/0586; Y10T83/444; Y10T83/4577; Y10T83/647; Y10T83/6476; Y10T83/6484; Y10T83/6486
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A method for the manufacture of washers and the like from a strip of sheet material having one straight edge, said method comprising: positioning said straight edge along a guide means; notching said sheet by die cutting a pair of opposing V notches through the thickness of said sheet material in such a manner that the legs of one such V notch extend from its vertex to one edge of said sheet material and the legs of the other V notch extend from its vertex to the opposite edge of said sheet material; simultaneously with said notching step, trimming said sheet material to a predetermined width; said trimming being carried out by die cutting material from the edge opposite said straight edge to produce a sheet of desired width having parallel edges; advancing said sheet material in a direction parallel to said straight edge, and shearing said sheet material at a line joining the vertices of each pair of V notches.
Claim 2
Independent Claim
161 words
A method for the manufacture of washers and the like from a strip of sheet material having one straight edge, said method comprising: positioning said straight edge along a guide means; notching said sheet by die cutting a pair of opposing V notches through the thickness of said sheet material in such a manner that the legs of one such V notch extend from its vertex to one edge of said sheet material and the legs of the other V notch extend from its vertex to the opposite edge of said sheet material; simultaneously with said notching step, trimming said sheet material to a predetermined width; said trimming being carried out by die cutting material from the edge opposite said straight edge to produce a sheet of desired width having parallel edges; advancing said sheet material in a direction parallel to said straight edge, and shearing said sheet material at a line joining the vertices of each pair of V notches.
Claim 3
Dependent Claim
44 words
A method in accordance with claim 1 wherein said pairs of V notches are made in such a manner that the legs of each said V notch are equal in length and intersect the edges of said sheet to form pairs of isosceles triangles.
Claim 4
Dependent Claim
50 words
A method in accordance with claim 1 wherein the depth of each of said V notches as measured from the notch vertex to the edge of said sheet in which said notch is formed, along a line perpendicular to said edge, is less than one-half the width of said sheet.
Claim 5
Dependent Claim
31 words
A method in accordance with claim 1 wherein the vertices of each said pair of V notches so formed lie opposite one another along a line perpendicular to said straight edge.
Claim 6
Dependent Claim
19 words
A method in accordance with claim 1 further comprising the step of cutting fastener holes in said sheet material.
Claim 7
Dependent Claim
21 words
A method in accordance with claim 5 further comprising cutting said fastener holes simultaneously with the steps of notching and trimming.
Claim 8
Dependent Claim
23 words
A method in accordance with claim 1 wherein said sheet is advanced a distance equal to the trimmed, predetermined width of said sheet.
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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) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |