Back to results
US 4,901,449 AGranted
Tri-flotation air bar
AssigneeW. R. Grace & Co.-Conn.
InventorRichard J. Wimberger
Life of this patent
Estimating the term…
Abstract
Air flotation bar for use in floating and drying continuous webs of material in a dryer using dimensionally enlarged air bars. Air flows through three Coanda air slots to provide an air flow distributed over a large area of a passing web to maintain heat transfer capabilities and flotation capabilities. A central Coanda slot air impinges against a web for enhanced heat transfer while outer Coanda slots create a flotation pressure pad.
Claims35
Air flotation bar comprising:
- a. a single chamber air bar header means;
- b. three substantially parallel, longitudinal Coanda slots positioned on a top surface of said single chamber air bar header means;
- and,
- c. chamber means in said air bar header means for passing air to each of said Coanda slots.
1 more element
Air flotation bar for positioning and drying of a moving web of material comprising:
- a. a chamber and a means for flow straightening in said chamber;
- b. central support chamber and two support chambers opposing said central support chamber, said central support chamber connected to said chamber;
- c. opposing upper air bar channel chambers forming an inner Coanda slot therebetween and above said central support chambers;
- and,
- d. side walls with lips positioned about said support chambers and outer sides of said upper air bar channel chambers with a space therebetween forming outer Coanda slots.
2 more elements
Air flotation bar for positioning and drying of a moving web of material comprising:
- a. a lower air flow chamber, an upper air flow chamber and a means for flow straightening therebetween;
- b. central support chamber and two support chambers opposing said central support chamber, said central support chamber connected to said upper air flow chamber;
- c. opposing upper air bar channel chambers forming an inner Coanda slot therebetween and above said central support chambers;
- and,
- d. side walls with lips positioned about said support chambers and outer sides of said upper air bar channel chambers with a space therebetween forming outer Coanda slots.
2 more elements
Air flotation bar comprising:
- a. a bottom member with an inlet hole therein, air bar header end plates affixed to said bottom member, two sides extending upwardly from said bottom member, and a means for creating a pressure drop secured at a midportion of said sides;
- b. opposing right angled flanged members secured to said side members, said flanged member including holes in a base thereof, a top edge of said flange and a top edge of said side member forming a Coanda slot about each side member;
- and,
- c. a support member with center orifices extending between said flanged members, opposing vertical struts secured about each side of said orifices, opposing lower and upper air bar channels secured between said flange member and said struts and forming a Coanda slot therebetween.
1 more element
Air flotation bar comprising:
- a. a bottom member with an inlet hole therein, air bar header end plates affixed to said bottom member, two sides extending upwardly from said bottom member, and a diffuser plate with holes secured at a mid-portion of said sides;
- b. opposing right angled flanged members secured to said side members, said flanged member including holes in a base thereof, a top edge of said flange and a top edge of said side member forming a Coanda slot about each side member;
- and,
- c. a support member with center orifices extending between said flanged members, opposing vertical struts secured about each side of said orifices, opposing lower and upper air bar channels secured between said flange member and said struts and forming a Coanda slot therebetween.
1 more element
Air flotation bar comprising:
- a. a bottom member with an inlet hole therein, air bar header end plates affixed to said bottom member, two sides extending upwardly from said bottom member, and a means for creating a pressure drop secured at a mid portion of said side;
- b. opposing U shaped channel members secured to a perforated plate, said plate secured to said side members, and each outer edge of said channel member forming a Coanda slot about each side;
- and,
- c. a space between said U shaped channel and a plurality of holes on an inner edge of said channel members forming a Coanda slot therebetween.
1 more element
Air flotation bar for positioning and drying of a moving web of material comprising:
- a. a chamber;
- b. central support chamber and two support chambers opposing said central support chamber, said central support chamber connected to said chamber;
- c. opposing upper air bar channel chambers forming an inner Coanda slot therebetween and above said central support chambers;
- and,
- d. side walls with lips positioned about said support chambers and outer sides of said upper air bar channel chambers with a space therebetween forming outer Coanda slots.
2 more elements
Air flotation bar for positioning and drying of a moving web of material comprising:
- a. a lower air float chamber and an upper air flow chamber;
- b. central support chamber and two support chambers opposing said central support chamber, said central support chamber connected to said upper air flow chamber;
- c. opposing upper air bar channel chambers forming an inner Coanda slot therebetween and above said central support chambers;
- and,
- d. side walls with lips positioned about said support chambers and outer sides of said upper air bar channel chambers with a space therebetween forming outer Coanda slots.
2 more elements
Air flotation bar comprising:
- a. a bottom member with an inlet hole therein, air bar header end plates affixed to said bottom member and two sides extending upwardly from said bottom member;
- b. opposing right angled flanged members secured to said side members, said flanged member including holes in a base thereof, a top edge of said flange and a top edge of said side member forming a Coanda slot about each side member;
- and,
- c. a support member with center orifices extending between said flanged members, opposing vertical struts secured about each side of said orifices, opposing lower and upper air bar channels secured between said flange member and said struts and forming a Coanda slot therebetween.
1 more element
Air flotation bar comprising:
- a. a bottom member with an inlet hole therein, air bar header end plates affixed to said bottom member and two sides extending upwardly from said bottom member;
- b. opposing right angled flanged members secured to said side members, said flanged member including holes in a base thereof, a top edge of said flange and a top edge of said side member forming a Coanda slot about each side member;
- and,
- c. a support member with center orifices extending between said flanged members, opposing vertical struts secured about each side of said orifices, opposing lower and upper air bar channels secured between said flange member and said struts and forming a Coanda slot therebetween.
1 more element
Air flotation bar comprising:
- a. a bottom member with an inlet hole therein, air bar header end plates affixed to said bottom member and two sides extending upwardly from said bottom member;
- b. opposing U shaped channel members secured to a perforated plate, said plate secured to said side members, and each outer edge of said channel member forming a Coanda slot about each side;
- and,
- c. a space between said U shaped channel and a plurality of holes on an inner edge of said channel members forming a Coanda slot therebetween.
1 more element
Dependencies are inferred from the claim text.