US4025601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of drawing a shaped plastic shoe having hollow pointed projections
Assignee: Orica Ltd
•
Filing: 1974-05-13
•
Granted: 1977-05-24
•
Expires: 1994-05-13
Abstract
Abstract A process of cold drawing a shaped plastic sheet wherein said sheet has an array of substantially parallel rows of hollow pointed projections on one or both faces; said projections having at least a portion of the distal portion of the sides at an angle of over 60° to the median plane of the sheet which process comprises cold drawing the shaped plastic sheet along an axis in the plane of the sheet normal to the rows of hollow projections.
Inventors
- 👤 Donald George Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:02
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A process of cold drawing a shaped plastic sheet wherein said sheet has a plurality of hollow pointed projections on one or both faces arranged in an array that forms parallel rows in at least one direction, said hollow pointed projections having at least a portion of the distal portion of the sides at an angle of over 60° to the median plane of the sheet which process comprises cold drawing the shaped plastic sheet by stretching the sheet along an axis in the median plane of the sheet and normal to a direction of parallel rows of projections, to thereby produce an oriented plastic sheet containing projections which remain incompletely drawn.
Claim 2
Dependent Claim
112 words
A process of cold drawing a shaped plastic sheet wherein said sheet has a plurality of hollow pointed projections on one or both faces arranged in an array that forms parallel rows in at least one direction, said hollow pointed projections having at least a portion of the distal portion of the sides at an angle of over 60° to the median plane of the sheet which process comprises cold drawing the shaped plastic sheet by stretching the sheet along an axis in the median plane of the sheet and normal to a direction of parallel rows of projections, to thereby produce an oriented plastic sheet containing projections which remain incompletely drawn.
Claim 3
Dependent Claim
18 words
A process according to claim 1 wherein the hollow pointed projections are in the form of hollow cusps.
Claim 4
Dependent Claim
32 words
A process according to claim 2 wherein the distal portion of the sides of the hollow pointed projections are at an angle of over 70° to the median plane of the sheet.
Claim 5
Dependent Claim
41 words
A process according to claim 2 wherein the cusps are thin walled near the tip, relatively thick walled near the base of the cusp and the distal portion of the cusp has sides substantially normal to the plane of the sheet.
Claim 6
Dependent Claim
14 words
A process according to claim 2 wherein the shaped sheet consists of interconnecting cusps.
Claim 7
Dependent Claim
20 words
A process according to claim 1 wherein the shaped plastic sheet is stretched over 4 fold and under 16 fold.
Claim 8
Dependent Claim
30 words
A process according to claim 1 wherein the material of the plastic sheet is low density polyethylene, high density polyethylene, polyethylene terephthalate, nylon 6, nylon 66, nylon 610, or polypropylene.
References Cited (Backward Citations)
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Cited
US3470595A
Cited
US3484835A
Cited
US3574809A
Cited
US3682760A
Cited
BE792077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |