Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Reexamination Certificate
2005-09-20
2005-09-20
Del Sole, Joseph S. (Department: 1722)
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
C264S209400, C264S209500, C425S19200R, C425S326100, C425S388000, C425S392000, C425S191000, C425S325000
Reexamination Certificate
active
06946094
ABSTRACT:
There is provided a plastic extrusion sizing tube having a cylinder with a split along its length to allow for radial expansion and reduction of the sizing tube. The cylinder has holes to allow an extrusion within the cylinder to be drawn to the cylinder by a vacuum outside the cylinder. The cylinder also has extensions on opposite sides of the split with an adjustment screw connecting the extensions. The diameter of the cylinder can be expanded or reduced when the adjustment screw is turned in respective directions. A set screw can be connected to one of the extensions. The diameter of the cylinder can be expanded or reduced when the set screw is turned in respective directions. The diameter of the cylinder can be locked in a desired position when the adjustment screw and the set screw are turned in the same direction. The adjustment screw and the set screw can be located in a flange at one end of the cylinder. The holes in the cylinder can be slots.
REFERENCES:
patent: 3958913 (1976-05-01), Stangl
patent: 4543051 (1985-09-01), Maillefer
patent: 5296188 (1994-03-01), Lupke
patent: 6050800 (2000-04-01), Chapman et al.
American Maplan Corporation
Del Sole Joseph S.
Hamilton Brook Smith & Reynolds P.C.
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