Patent US3920136A successfully refreshed from Google Patents.
US3920136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cushion unwind support for reeled sheet
Assignee: Westvaco Corp
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Filing: 1974-07-15
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Granted: 1975-11-18
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Expires: 1994-07-15
Abstract
Abstract Large rolls of reeled paper sheet may be supported for unwinding by a flexible support sling which conforms to the curvature of said roll adjacent an arcuate portion of the peripherial surface thereof, said support sling being perforated by one or more apertures which are in fluid communication with a pressurized gas source.
Inventors
- 👤 David F Talbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:49
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/24; B65H16/00; B65H16/02; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/413; B65H2301/4137; Y; Y10; Y10S; Y10S242/00; Y10S242/908
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
114 words
An apparatus for dispensing thin sheet material from a cylindrical reel thereof, said apparatus comprising: A. a flexible sling means draped between two suspension points to form a cradle therebetween havinG an arcuate bight area to position and support a cylindrical reel therein; B. a plurality of apertures through said sling within said bight area; and, C. pressurized fluid supply means in communication with said apertures for discharging a continuous fluid flow between said sling and said cylindrical reel, said apertures being positioned on said sling means to channel the dominance of said fluid flow along the circumference of said reel between the outer periphery thereof and the bight area of said sling means.
Claim 2
Independent Claim
114 words
An apparatus for dispensing thin sheet material from a cylindrical reel thereof, said apparatus comprising: A. a flexible sling means draped between two suspension points to form a cradle therebetween havinG an arcuate bight area to position and support a cylindrical reel therein; B. a plurality of apertures through said sling within said bight area; and, C. pressurized fluid supply means in communication with said apertures for discharging a continuous fluid flow between said sling and said cylindrical reel, said apertures being positioned on said sling means to channel the dominance of said fluid flow along the circumference of said reel between the outer periphery thereof and the bight area of said sling means.
Claim 3
Dependent Claim
21 words
Apparatus as described by claim 1 wherein the bight area of said sling is coated with a smooth surface plastic material.
Claim 4
Dependent Claim
22 words
Apparatus as described by claim 1 wherein said bight area extends between 90 and 180 arcuate degrees of wrap around said reel.
Claim 5
Dependent Claim
30 words
Apparatus as described by claim 1 wherein a chamber is formed between said reel and said bight area by a greater thickness of said sling along the lateral edges thereof.
Claim 6
Dependent Claim
36 words
Apparatus as described by claim 1 including linkage means and wherein one of said suspension points is secured to said linkage means for moving said one suspension point relative to the other of said suspension points.
Claim 7
Dependent Claim
35 words
Apparatus as described by claim 5 wherein said movable suspension point is secured to said linkage means whereby the degree of sling wrap about said reel is relatively constant between certain limits of reel diameter.
Claim 8
Dependent Claim
141 words
A support apparatus for holding a cylindrical reel of thin sheet material in an approximately fixed position for depletion of said reel by withdrawal of said sheet material therefrom, said apparatus comprising: A. flexible sling means having opposite ends thereof pivotally secured to respective support structure, said sling means being draped 90 to 180 arcuate degrees of wrap about a cylindrical reel located between said opposite ends; B. a plurality of apertures through said sling means within the arcuate wrap portion thereof. C. pressurized fluid supply means in flow communication with said apertures for discharging a continuous fluid flow into an interproximal space between said arcuate wrap portion of said sling and said cylindrical reel, said apertures being positioned on said sling means to channel the dominance of said fluid flow along the circumference of said reel within said interproximal space.
Claim 9
Dependent Claim
141 words
A support apparatus for holding a cylindrical reel of thin sheet material in an approximately fixed position for depletion of said reel by withdrawal of said sheet material therefrom, said apparatus comprising: A. flexible sling means having opposite ends thereof pivotally secured to respective support structure, said sling means being draped 90 to 180 arcuate degrees of wrap about a cylindrical reel located between said opposite ends; B. a plurality of apertures through said sling means within the arcuate wrap portion thereof. C. pressurized fluid supply means in flow communication with said apertures for discharging a continuous fluid flow into an interproximal space between said arcuate wrap portion of said sling and said cylindrical reel, said apertures being positioned on said sling means to channel the dominance of said fluid flow along the circumference of said reel within said interproximal space.
Claim 10
Dependent Claim
23 words
Apparatus as described by claim 7 wherein said arcuate wrap portion of said sling comprises a face lamination of low friction polymer material.
Claim 11
Dependent Claim
16 words
Apparatus as described by claim 8 wherein said face lamination comprises ridges along lateral edges thereof.
Claim 12
Dependent Claim
34 words
Apparatus as described by claim 7 wherein support structure relative to one of said sling ends is secured by linkage means whereby said one sling end is movable relative to said other sling end.
Claim 13
Independent Claim
103 words
A method of supporting a cylindrical reel of thin sheet material for rotatively depleting same, said method comprising the steps of: A. wrapping a flexible support sling 90 to 180 arcuate degrees about said reel; B. suspending said support sling from respective ends thereof; C. discharging a continuous flow of pressurized fluid between said reel and the arcuate wrap of said sling, the dominant portion of said fluid flow being channeled to flow along the circumference of said reel between the outer periphery thereof and the arcuate wrap portion of said sling; and D. rotating said reel within the confines of said sling.
Claim 14
Independent Claim
103 words
A method of supporting a cylindrical reel of thin sheet material for rotatively depleting same, said method comprising the steps of: A. wrapping a flexible support sling 90 to 180 arcuate degrees about said reel; B. suspending said support sling from respective ends thereof; C. discharging a continuous flow of pressurized fluid between said reel and the arcuate wrap of said sling, the dominant portion of said fluid flow being channeled to flow along the circumference of said reel between the outer periphery thereof and the arcuate wrap portion of said sling; and D. rotating said reel within the confines of said sling.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |