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US 3,942,723 AGranted
Twin chambered gas distribution system for melt blown microfiber production
AssigneeBeloit Corporation
InventorRoy A. Langdon
Life of this patent
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Abstract
Forming system for generating from heated, pressurized gas a pair of flattened, angularly colliding gas streams, each stream being adapted to be on a different opposed side of a die head producing a plurality of generally aligned, spaced, hot melt strands of polymeric material or the like. The system employs a plenum chamber on each such opposed side, and heated, pressurized gas enters into and passes from each such chamber through a slotted nozzle associated therewith. The nozzles are positioned to produce the desired colliding gas streams. Each stream is substantially identical to the other.
Claims12
Apparatus adapted to form a pair of angularly colliding, elongated gas streams comprising:
- A. a pair of elongated plenum housing means in spaced relationship to each other, each such plenum housing means defining therewithin an elongated plenum chamber and having plenum input port means defined therein and a plenum output port means defined in longitudinally extending wall portions thereof,
- B. a pair of elongated nozzle means, each one being interconnected in fluid-tight engagement with a different one of said plenum housing means, each said nozzle means having a longitudinally elongated nozzle input port means defined therein and a longitudinally elongated nozzle orifice defined therein, said plenum output port means communicating with said nozzle input port means, each of said nozzle output orifices being in spaced, parallel relationship to the other thereof and oriented angularly so that cross-sectionally the angle of inclination between respective center planes of said output orifices relative to each other ranges from about 90.degree. to 180.degree., said nozzle input port means being substantially wider in width than the width of said nozzle output orifice in each of said nozzle means, the side walls of each said nozzle means generally defining a taper between said nozzle input port means and said nozzle output orifice thereof,
- C. the relationship between each of said input port means and said plenum housing means associated therewith being such that a pressurized gas entering such plenum housing means from such input port means expands in such plenum housing over its pressure in the region of said input port means to an extent such that the ratio of gas pressures before and after such expansion is at least about 4:1, and
- D. means for adjusting the width of each of said nozzle output orifices along the length thereof.
1 more element
Apparatus adapted to form a pair of angularly colliding, elongated gas streams comprising:
- A. gas supply means adapted to emit continuously a pressurized gas,
- B. heating means adapted to heat said gas to an elevated temperature,
- C. a pair of elongated plenum housing means in spaced relationship to each other, each such plenum housing means defining therewithin an elongated plenum chamber and having plenum input port means defined therein and a plenum output port means defined in longitudinally extending side wall portions thereof,
- D. a pair of elongated nozzle means, each one being interconnected in fluid-tight engagement with a different one of said plenum housing means, each said nozzle means having a longitudinally elongated nozzle input port means defined therein and a longitudinally elongated nozzle output orifice defined therein, said plenum output port means communicating with said nozzle input port means, and being generally coextensive therewith, each of said nozzle output orifices being in spaced, parallel relationship to the other thereof and oriented angularly so that cross-sectionally the angle of inclination between respective center planes of said output orifices relative to each other ranges from about 90.degree. to 180.degree., said nozzle input port means being substantially wider in width than said nozzle output orifice in each said nozzle means, the side walls of each said nozzle means generally defining a taper between said nozzle input port means and said nozzle output orifice thereof,
- E. tube means functionally interconnecting said gas supply means, said heating means, and each of said input port means, and adapted to deliver heated, pressurized gas into each of said plenum housing means,
- F. the relationship between each of said input port means and said plenum housing means associated therewith being such that a pressurized gas entering such plenum housing means from such input port means expands in such plenum housing over its pressure in the region of said input port means to an extent such that the ratio of gas pressures before and after such expansion is at least about 4:1, and
- G. means for adjusting the width of each of said nozzle output orifices along the length thereof.
4 more elements
Dependencies are inferred from the claim text.