US3759123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for cutting out apertures in the wall of a plastic tube
Assignee: Wavin BV
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Filing: 1971-06-08
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Granted: 1973-09-18
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Expires: 1991-06-08
Abstract
Abstract A process of forming apertures in the wall of a corrugated thermoplastic tube by punching the wall with a punch. The outer circumference of the tube is engaged with a hollow tubular guide in the region of punching and the inner surface of the tube is completely unsupported.
Inventors
- 👤 Zon C Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:55
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/0015; B26F1/0061; B26F1/0046; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0596; Y10T83/485; Y10T83/494; Y10T83/869; Y10T83/8821; Y10T83/8841; Y10T83/8843
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
A method for forming apertures in the wall of a relatively thin-walled corrugated plastic tube for drainage purposes, said method comprising passing the tube through a hollow tubular guide support, punching apertures in the tube by radially piercing the tube with a punch from the exterior thereof, supporting the tube only on one side of the region where the tube is punched, in said support over a portion of the outer surface of the tube, such that the tube can be punched without any internal support for the tube, and effecting the punching of the apertures in the hollows of the corrugated tube in proximity with the location where the tube exits from the guide support where the tube is unsupported.
Claim 2
Independent Claim
121 words
A method for forming apertures in the wall of a relatively thin-walled corrugated plastic tube for drainage purposes, said method comprising passing the tube through a hollow tubular guide support, punching apertures in the tube by radially piercing the tube with a punch from the exterior thereof, supporting the tube only on one side of the region where the tube is punched, in said support over a portion of the outer surface of the tube, such that the tube can be punched without any internal support for the tube, and effecting the punching of the apertures in the hollows of the corrugated tube in proximity with the location where the tube exits from the guide support where the tube is unsupported.
Claim 3
Dependent Claim
28 words
A method as claimed in claim 1 wherein said guide support is formed with internal threads and the tube is passed through the support in threaded engagement therewith.
Claim 4
Dependent Claim
27 words
A method as claimed in claim 2 wherein the tube is passed through the support by rotating the support while holding the support in axially fixed relation.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |