US4390420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire cloth tensioning apparatus
Assignee: WS Tyler Inc
•
Filing: 1981-11-12
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Granted: 1983-06-28
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Expires: 2001-11-12
Abstract
Abstract Apparatus for supporting screen (12) in a screening machine (10) that will permit long-life of the screen even when subjected to heat and vibration. The screen or wire cloth edge is folded over (30) and fastened or joined (42, 44, 46), with a metal rod (32) inserted down through the foldover space (34). Spring clips (40) or other adjustable tensioning devices attach the steel rod (32) to the screening machine frame (50), thus placing the screen (12) in tension.
Inventors
- 👤 Peter H. Tenhaaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:46
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/48; B07B2201/00; B07B2201/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
In a screening apparatus, a frame, support means for attaching the screen within said frame, said support means including a folded over edge portion of the screen on at least two opposite sides along their entire edges, means for securing the folded over edge portion to the inner portion of the screen, thus forming passage means enclosed by the screen which extends along the two opposite sides, rod means extending through the passage means on the two opposite sides of the screen, a plurality of spaced openings formed in the screen on each said opposite side thereof, through which the rod means are exposed, and resilient means for securing the rod means to the frame at each of the spaced openings.
Claim 2
Dependent Claim
121 words
In a screening apparatus, a frame, support means for attaching the screen within said frame, said support means including a folded over edge portion of the screen on at least two opposite sides along their entire edges, means for securing the folded over edge portion to the inner portion of the screen, thus forming passage means enclosed by the screen which extends along the two opposite sides, rod means extending through the passage means on the two opposite sides of the screen, a plurality of spaced openings formed in the screen on each said opposite side thereof, through which the rod means are exposed, and resilient means for securing the rod means to the frame at each of the spaced openings.
Claim 3
Dependent Claim
14 words
The screening apparatus set forth in claim 1, including means for vibrating the screen.
Claim 4
Dependent Claim
22 words
The screening apparatus set forth in claim 1, wherein the support means secures all four sides of the screen to said frame.
Claim 5
Dependent Claim
16 words
The screening apparatus set forth in claim 1, wherein the resilient means are resilient spring clips.
Claim 6
Dependent Claim
17 words
The screening apparatus set forth in claim 1, wherein the folded over edge portion is spot welded.
Claim 7
Dependent Claim
24 words
The screening apparatus set forth in claim 1, wherein the folded over edge portion is spot welded on all three sides surrounding each opening.
References Cited (Backward Citations)
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US1923229A
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US2511239A
Cited
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Cited
US2959285A
Cited
US3388797A
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) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |