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United States Patent 6017477
Douris , ê et al. January 25, 2000

Extrusion apparatus and process

Lu , Ê et al. January 25, 2000

Abstract

Extrusion apparatus is employed in a co-extrusion process to produce a triangular-shaped barrel for a writing instrument. An inner layer of material is extruded in tubular form having a substantially circular cross-section. A coating layer of three strips of material, equally spaced one from the other, is co-extruded about the outer periphery of the inner layer. A combination of forces produced during the process is effective to distort the inner layer to form a product having a substantially triangular shape.

 

 

 

 

 

 

 

 

 

 




Feed Screws
Barrels
Augers
Static Mixers
Wear Measuring Devices
  • Manufactured
  • Rebuild
  • Repaired
  • Designed
En Español

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