US3567093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid cushion turning roll for moving web
Assignee: Michigan Oven Co
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Filing: 1969-06-03
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Granted: 1971-03-02
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Expires: 1989-06-03
Abstract
Abstract A fluid cushion turning roll for supporting a longitudinally moving web around an arcuate turn, comprising a pair of radial side plates at the opposite ends of the turn, an array of arcuate-edged baffle members extending between the side plates, and a base member closing off the bottoms of the baffle members to define a plurality of narrow arcuate pressure chambers across the inside of the turn. A constant-pressure fluid supply supplies air or other gas to all of the pressure chambers, through limiting orifices in the base member, affording a fluid cushion supporting the web out of engagement with the solid elements of the turning roll.
Inventors
- 👤 Lioyd W Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:36
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/24; B65G; B65G15/00; B65G15/60; F; F26; F26B; F26B13/00; F26B13/10; F26B13/101; F26B13/104; B65G2201/00; B65G2201/02; B65H2406/00; B65H2406/10; B65H2406/11; B65H2406/111
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
179 words
A fluid cushion turning roll for supporting and guiding a web of given width, moving longitudinally along a path, around an arcuate turn in the path, comprising: a pair of side plates extending transversely of said path at the opposite ends of the turn, and projecting inwardly of said path; an array of baffle members, extending between said side plates in mutually spaced relation to each other, each baffle member having an arcuate outer edge conforming approximately to the configuration of said turn; a base member closing off the inner portion of said array of baffle members; said side plates, said baffle members and said base member conjointly defining a plurality of narrow arcuate pressure chambers across the inside of said turn, said base member having at least one opening therethrough leading into each pressure chamber; and fluid supply means for supplying a compressible fluid, under substantially constant pressure, to all of said pressure chambers, through said base member openings, to afford a fluid cushion supporting said web out of engagement with the solid elements of the turning roll.
Claim 2
Dependent Claim
179 words
A fluid cushion turning roll for supporting and guiding a web of given width, moving longitudinally along a path, around an arcuate turn in the path, comprising: a pair of side plates extending transversely of said path at the opposite ends of the turn, and projecting inwardly of said path; an array of baffle members, extending between said side plates in mutually spaced relation to each other, each baffle member having an arcuate outer edge conforming approximately to the configuration of said turn; a base member closing off the inner portion of said array of baffle members; said side plates, said baffle members and said base member conjointly defining a plurality of narrow arcuate pressure chambers across the inside of said turn, said base member having at least one opening therethrough leading into each pressure chamber; and fluid supply means for supplying a compressible fluid, under substantially constant pressure, to all of said pressure chambers, through said base member openings, to afford a fluid cushion supporting said web out of engagement with the solid elements of the turning roll.
Claim 3
Dependent Claim
26 words
A fluid cushion turning roll according to claim 1, in which said base member includes a plurality of individual openings into each of said pressure chambers.
Claim 4
Dependent Claim
52 words
A fluid cushion turning roll according to claim 2, in which the openings into each pressure chamber include an end opening adjacent each side plate and at least one intermediate opening spaced a substantial distance from both side plates, and in which said end openings are substantially larger than said intermediate openings.
Claim 5
Dependent Claim
36 words
A fluid cushion turning roll according to claim 2 in which each of said openings is a limiting orifice much smaller in cross-sectional area than the area of said base member covered by each pressure chamber.
Claim 6
Dependent Claim
31 words
A fluid cushion turning roll according tO claim 1 in which each of said side plates has a thin, straight, beveled outer edge extending parallel to the axis of the turn.
References Cited (Backward Citations)
US3127080A
Cited
US3216129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |