US3595111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming workpieces
Assignee: Individual
•
Filing: 1969-03-05
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Granted: 1971-07-27
•
Expires: 1989-03-05
Abstract
Abstract Apparatus for cutting foam rubber and the like to a desired shape from a blank of foam rubber material. The apparatus includes a punch and die set which has complementary cutting edges adapted to abut against each other when the set is closed, and complementary lands on one side of each cutting edge in spaced relation when the set is closed for engaging and compressing the blank as an incident to closing the set, thereby causing controlled internal flow of the material immediately prior to the material being cut so that the cutting operation produces an article of the desired shape. A method of cutting an article to a desired shape is disclosed comprising the steps of applying pressure to a portion of a blank of resilient material so as to cause internal flow within the elastic limits of the material across the intended path of cut, and then cutting the material on said intended path of cut while maintaining the pressure on the blank.
Inventors
- 👤 Welcome D Hershberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:56
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/003; B26D3/28; B26D3/281; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/0419; Y10T83/0429; Y10T83/0581; Y10T83/323; Y10T83/566; Y10T83/5669; Y10T83/869; Y10T83/8821; Y10T83/8837
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
A method of cutting a workpiece to a desired shape from a blank of resilient material comprising the steps of positioning the blank between two cutting edges which are mounted for relative movement toward one another into abutting relation, applying pressure to a portion of the blank on one side of the intended path of cut an amount relatively greater than on the other side of the intended path of cut so as to cause internal flow of resilient material of the blank transversely across the intended path of cut, and relatively moving said cutting edges toward one another into abutting engagement to cut said blank while said pressure is applied.
Claim 2
Independent Claim
111 words
A method of cutting a workpiece to a desired shape from a blank of resilient material comprising the steps of positioning the blank between two cutting edges which are mounted for relative movement toward one another into abutting relation, applying pressure to a portion of the blank on one side of the intended path of cut an amount relatively greater than on the other side of the intended path of cut so as to cause internal flow of resilient material of the blank transversely across the intended path of cut, and relatively moving said cutting edges toward one another into abutting engagement to cut said blank while said pressure is applied.
Claim 3
Dependent Claim
25 words
A method of cutting a workpiece according to claim 1 wherein the portion to which pressure is applied is a part of the cut workpiece.
Claim 4
Dependent Claim
29 words
A method of cutting a workpiece according to claim 1 wherein the portion to which pressure is applied is a part of the blank adjacent to the cut workpiece.
Claim 5
Dependent Claim
59 words
A method of cutting a workpiece according to claim 1 wherein pressure is applied to portions of the blank adjacent to both sides of the intended path of cut so as to effect a desired pattern of internal flow of the resilient material, and thereafter cutting said material on said intended path of cut while such pressures are applied.
Claim 6
Dependent Claim
19 words
A method of cutting a workpiece according to claim 1 wherein said blank of resilient material comprises foam rubber.
Claim 7
Dependent Claim
44 words
A method of cutting a workpiece according to claim 1 wherein the step of cutting the workpiece from a blank of resilient material is accomplished by supporting the blank in a die of a punch-and-die set, and striking the blank with the associated punch.
Claim 8
Dependent Claim
47 words
A method of cutting a workpiece according to claim 6 wherein the pressure is applied to a portion of the blank prior to cutting the same by compressing said portion between said punch and said die as an initial incident to the striking action of said punch.
Claim 9
Dependent Claim
68 words
Apparatus for cutting a workpiece to a desired shape from a blank of resilient material comprising a punch and a die set having complementary cutting edges adapted to abut against each other when the set is closed, and complementary lands on one side of each cutting edge in spaced-apart relation when said set is closed for engaging and compressing said blank as as incident to closing said set.
Claim 10
Dependent Claim
68 words
Apparatus for cutting a workpiece to a desired shape from a blank of resilient material comprising a punch and a die set having complementary cutting edges adapted to abut against each other when the set is closed, and complementary lands on one side of each cutting edge in spaced-apart relation when said set is closed for engaging and compressing said blank as as incident to closing said set.
Claim 11
Dependent Claim
31 words
Apparatus for cutting a workpiece according to claim 8 wherein said lands are located on the side of each cutting edge remote from the which defines the periphery of the workpiece.
Claim 12
Dependent Claim
28 words
Apparatus for cutting a workpiece according to claim 8 wherein said lands are located on the side of each cutting edge which defines the periphery of the workpiece.
References Cited (Backward Citations)
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US1617511A
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US2295090A
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US2375518A
Cited
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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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |