US4066202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making tubular welded wire screens
Assignee: TRISLOT SYSTEMS NV ROTERIJSTRAAT 134-136 WAREGEM BELGIUM A CORP OF BELGIUM
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Filing: 1976-10-14
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Granted: 1978-01-03
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Expires: 1996-10-14
Abstract
Abstract A method for making cylindrical welded wire screens by continuously bending a wire into a helical wrap with juxtaposed equal wraps having their diameter substantially equal to the desired finished diameter of the screen whereby the radius of curvature applied to the wire is smaller than the radius of the wrap and the bending area is inside the outer circumference, supporting the wraps and progressively guiding them and bringing them into contact with supporting wires substantially parallel to the generatrix of the cylinder, and welding the wraps to the supporting wires at their contact points.
Inventors
- 👤 Edouard Binard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:36
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/002; B23K11/008; B21; B21F; B21F27/00; B21F27/12; B21F27/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49602
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
A method for making cylindrical welded wire screens comprising: a. continuously bending a wire into a helical wrap so as to form juxtaposed equal wraps substantially free of residual bending stresses, each of said wraps having a diameter substantially equal to the desired finish diameter of the cylindrical screen and whereby the radius of curvature imparted to the wire during the bending step is smaller than the radius of the formed wraps, said continuous bending being performed inside the outer circumference of the wraps, b. supporting said formed wraps and progressively guiding said formed wraps and bringing successive points of said formed wraps into contact with a plurality of supporting wires extending in the contact area substantially parallel to the generatrix of the cylindrical screen thereby substantially equally spacing successive connecting points of the wraps with the same supporting wire, and c. connecting successive contact points of said wraps with said supporting wires by welding.
Claim 2
Independent Claim
155 words
A method for making cylindrical welded wire screens comprising: a. continuously bending a wire into a helical wrap so as to form juxtaposed equal wraps substantially free of residual bending stresses, each of said wraps having a diameter substantially equal to the desired finish diameter of the cylindrical screen and whereby the radius of curvature imparted to the wire during the bending step is smaller than the radius of the formed wraps, said continuous bending being performed inside the outer circumference of the wraps, b. supporting said formed wraps and progressively guiding said formed wraps and bringing successive points of said formed wraps into contact with a plurality of supporting wires extending in the contact area substantially parallel to the generatrix of the cylindrical screen thereby substantially equally spacing successive connecting points of the wraps with the same supporting wire, and c. connecting successive contact points of said wraps with said supporting wires by welding.
Claim 3
Dependent Claim
33 words
A method as in claim 1 and wherein the inner diameter of the cylinder formed by the spiral wraps before welding is substantially equal to the outer diameter of the welded cylindrical screen.
Claim 4
Dependent Claim
11 words
Welded cylindrical screen produced according to the method of claim 1.
Claim 5
Dependent Claim
20 words
A screen as in claim 3 and wherein the outer diameter of the cylindrical screen is less than 25 cm.
Claim 6
Dependent Claim
17 words
A screen as in claim 4 wherein the space between adjacent wraps is less than 200 microns.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |