US3873013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High velocity web floating air bar having center exhaust means
Assignee: Tec Systems Inc
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Filing: 1973-10-04
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Granted: 1975-03-25
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Expires: 1993-10-04
Abstract
Abstract An air bar for floating web material and which includes two slot nozzles, one along each of its longitudinal edges and which nozzles direct air streams toward the web and partially toward one another. The bar has a lengthwise center exhaust means for immediately removing a percentage of the two converging air streams at the center of the air bar and directing them into a separate exhaust chamber within the air bar for ultimate discharge out of the opposite ends of the air bar.
Inventors
- 👤 Paul H Stibbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:32
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/101; F26B13/104; B; B41; B41F; B41F23/00; B41F23/04; B41F23/0403; B41F23/0423; B41F23/0426; B65; B65H; B65H23/00; B65H23/04; B65H23/24; B65H2406/00; B65H2406/10; B65H2406/11; B65H2406/112
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
190 words
An individual and replaceable air bar for floating a continuous running web and being elongated and of enclosed tubular shape and including opposite end walls, opposite side walls, and a generally flat plate located between said side walls, said plate having spaced apart longitudinal and curved edges and locatable closely adjacent the running web to be supported, said bar also having a pair of air supply slots one extending along each of said edges to form opposed Coanda nozzles therewith for directing a stream of pressurized air out of the interior of said air bar and against said web, a portion of said stream turning toward the center of said bar and along said web whereby said portions of said streams discharged by said pair of opposed nozzles merge at the center of said plate, an exhaust chamber formed within said air bar and under said plate, and exhaust passage means generally in the center of and through said plate and communicating with said exhaust chamber whereby said opposed portions of said streams of air are directed through said exhaust passage means and into said exhaust chamber for removal therefrom.
Claim 2
Dependent Claim
190 words
An individual and replaceable air bar for floating a continuous running web and being elongated and of enclosed tubular shape and including opposite end walls, opposite side walls, and a generally flat plate located between said side walls, said plate having spaced apart longitudinal and curved edges and locatable closely adjacent the running web to be supported, said bar also having a pair of air supply slots one extending along each of said edges to form opposed Coanda nozzles therewith for directing a stream of pressurized air out of the interior of said air bar and against said web, a portion of said stream turning toward the center of said bar and along said web whereby said portions of said streams discharged by said pair of opposed nozzles merge at the center of said plate, an exhaust chamber formed within said air bar and under said plate, and exhaust passage means generally in the center of and through said plate and communicating with said exhaust chamber whereby said opposed portions of said streams of air are directed through said exhaust passage means and into said exhaust chamber for removal therefrom.
Claim 3
Dependent Claim
28 words
An air bar set forth in claim 1 further characterized in that said exhaust chamber opens through each of the opposed end walls for discharge of air therefrom.
Claim 4
Dependent Claim
32 words
The air bar set forth in claim 2 further characterized in that said exhaust chamber is defined by said plate and also by another plate secured thereto and within said air bar.
Claim 5
Dependent Claim
32 words
The air bar set forth in claim 1 further characterized in that said exhaust chamber is defined by said plate and also by another plate secured thereto and within said air bar.
Claim 6
Dependent Claim
194 words
An individual and replaceable elOngated and generally tubular air bar for positioning a running web and including opposite end walls, opposite side walls, a plate with spaced apart longitudinal edges locatable closely adjacent the running web to be supported, said plate located between said side walls, and a pair of air supply slots one extending along each of said edges to form air discharging nozzles therewith for directing a stream of pressurized air out of the interior of said air bar and against said web, a portion of said streams turning toward the center of said bar and along said web whereby said portions of said streams discharged by said pair of nozzles move toward the center of said plate, an exhaust chamber formed within said air bar and under said plate, exhaust passage means generally in the center of and through said plate and communicating with said exhaust chamber whereby said portions of said streams of air are directed through said exhaust passage means and into said exhaust chamber for removal therefrom, and air supply inlet openings in said bar through which pressurized air is supplied to the interior of said air bar.
Claim 7
Dependent Claim
194 words
An individual and replaceable elOngated and generally tubular air bar for positioning a running web and including opposite end walls, opposite side walls, a plate with spaced apart longitudinal edges locatable closely adjacent the running web to be supported, said plate located between said side walls, and a pair of air supply slots one extending along each of said edges to form air discharging nozzles therewith for directing a stream of pressurized air out of the interior of said air bar and against said web, a portion of said streams turning toward the center of said bar and along said web whereby said portions of said streams discharged by said pair of nozzles move toward the center of said plate, an exhaust chamber formed within said air bar and under said plate, exhaust passage means generally in the center of and through said plate and communicating with said exhaust chamber whereby said portions of said streams of air are directed through said exhaust passage means and into said exhaust chamber for removal therefrom, and air supply inlet openings in said bar through which pressurized air is supplied to the interior of said air bar.
Claim 8
Dependent Claim
28 words
An air bar set forth in claim 5 further characterized in that said exhaust chamber opens through each of the opposed end walls for discharge of air therefrom.
Claim 9
Dependent Claim
32 words
The air bar set forth in claim 6 further characterized in that said exhaust chamber is defined by said plate and also by another plate secured thereto and within said air bar.
Claim 10
Dependent Claim
32 words
The air bar set forth in claim 5 further characterized in that said exhaust chamber is defined by said plate and also by another plate secured thereto and within said air bar.
Claim 11
Dependent Claim
246 words
An individual and replaceable air bar for being positioned transversely of and for floating a continuous running web, said bar being elongated and of enclosed tubular shape and including opposite end walls, two opposed side walls, and a Coanda plate between said side walls and having spaced apart and curved edges along its length and locatable closely adjacent the running web to be supported, said bar also having a pair of air supply slots one extending along each of said edges to form opposed Coanda nozzles therewith for directing a stream of pressurized air out of the interior of said air bar and against said web, a portion of said stream turning toward the center of said bar and along said web whereby said portions of said streams discharged by said pair of opposed nozzles tend to merge at the center of said Coanda plate, said supply slots being defined by said curved edges of said Coanda plate and said side walls, an exhaust chamber formed within said air bar and under said Coanda plate, said exhaust chamber being defined by said Coanda plate and also by another plate secured to said Coanda plate and within said air bar, and exhaust passage means generally in the center of and through said Coanda plate and communicating with the interior of said exhaust chamber whereby said opposed portions of said streams of air are directed through said exhaust passage means and into said exhaust chamber for removal therefrom.
Claim 12
Dependent Claim
246 words
An individual and replaceable air bar for being positioned transversely of and for floating a continuous running web, said bar being elongated and of enclosed tubular shape and including opposite end walls, two opposed side walls, and a Coanda plate between said side walls and having spaced apart and curved edges along its length and locatable closely adjacent the running web to be supported, said bar also having a pair of air supply slots one extending along each of said edges to form opposed Coanda nozzles therewith for directing a stream of pressurized air out of the interior of said air bar and against said web, a portion of said stream turning toward the center of said bar and along said web whereby said portions of said streams discharged by said pair of opposed nozzles tend to merge at the center of said Coanda plate, said supply slots being defined by said curved edges of said Coanda plate and said side walls, an exhaust chamber formed within said air bar and under said Coanda plate, said exhaust chamber being defined by said Coanda plate and also by another plate secured to said Coanda plate and within said air bar, and exhaust passage means generally in the center of and through said Coanda plate and communicating with the interior of said exhaust chamber whereby said opposed portions of said streams of air are directed through said exhaust passage means and into said exhaust chamber for removal therefrom.
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |