Fluid sprinkling – spraying – and diffusing – Rigid fluid confining distributor – Orifice shapes
Reexamination Certificate
2001-11-07
2004-10-05
Mar, Michael (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Rigid fluid confining distributor
Orifice shapes
C239S592000, C222S326000
Reexamination Certificate
active
06799736
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a material dispensing apparatus for dispensing a flowable material. More particularly, the present invention relates to a material dispensing apparatus as described, including a nozzle having a wedge-shaped aperture, and to a method of using same.
2. Description of the Background Art
Many devices are known for use in material handling. Examples of some known material handling devices include U.S. Pat. Nos. 4,569,628, 4,650,234, 4,802,816, 4,811,834, 5,481,794, and 5,145,388.
Certain filter-forming machinery is sold by Midmac Systems, Inc. of Saint Paul, Minn., and is shown and advertised on the Internet at http://www.midmac.com/FilterTech.htm.
Examples of some known patents relating to filter manufacture include U.S. Pat. Nos. 2,739,916, 3,164,506, 3,306,794, 3,948,712, 4,626,307, 4,747,816, 5,028,330, and 5,698,059.
SUMMARY OF THE INVENTION
The present invention provides a material dispensing apparatus, for dispensing a flowable material into a circular workpiece. The dispensing apparatus includes a dispenser body, and a dispenser nozzle having a wedge-shaped aperture. The nozzle includes a nozzle body having a flow passage therethrough, with an inlet and an outlet.
Preferably, the nozzle inlet is formed as a hollow cylinder, having female threads formed therein, to allow the nozzle to be threadably and rotatably attached to the dispenser body.
In a preferred embodiment, the nozzle body flow passage includes a bore formed in the nozzle body in communication with the inlet, and a substantially flattened channel in fluid communication with the bore, the substantially flattened channel having a wedge-shaped cross section corresponding to the nozzle outlet.
The tip of the nozzle is tapered, and the nozzle has a substantially flattened end face formed in the tip thereof, with the outlet aperture formed in the substantially flattened end face. The substantially flattened end face is disposed at an angle with respect to an adjoining surface of the nozzle, to facilitate and direct fluid flow therefrom.
The present invention also relates to a method of adding a flowable material to a workpiece having a circular outline.
A first step in the method hereof involves supporting a workpiece on a rotatable support member, the workpiece having a circular outline.
A subsequent step in the method hereof involves positioning a dispenser nozzle, having a wedge-shaped outlet aperture, over a selected portion of the workpiece, with a wide end of the aperture adjacent the outer side wall of the. This step may be accomplished by moving the nozzle to bring it near the workpiece, or by moving the workpiece into proximity to the nozzle.
Once the dispenser nozzle has been positioned over the selected portion of the workpiece, a valve is opened to allow material to flow through the nozzle.
After the material flow begins, the workpiece is rotated to deposit the material substantially evenly on the workpiece, and after the workpiece has been rotated an amount in a range between 350 and 370 degrees, the valve is closed to stop the material flow through the nozzle.
Accordingly, it is an object of the invention to provide a method and apparatus for dispensing a flowable material into a circular workpiece.
It is a further object of the present invention to provide a method and apparatus capable of dispensing a substantially constant thickness of material throughout the workpiece.
For a more complete understanding of the present invention, the reader is referred to the following detailed description section, which should be read in conjunction with the accompanying drawings. Throughout the following detailed description and in the drawings, like numbers refer to like parts.
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Osterfeld Gary J.
Parent Gary G.
Bui Thach H.
Honeywell International , Inc.
Mar Michael
LandOfFree
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