Patent ID: 6592793
Filing Date: 2003-07-15
Classification: B29C,B43K

Abstract:
Apparatus for manufacturing pencils, comprising a core material extruder, a sheath material extruder, a crosshead and die assembly for coating sheath material onto the core material, and means for sizing extrudate from the crosshead die, cooling means between the core material extruder and the crosshead die, the core material extruder being spaced from the cooling means by a predetermined distance to provide a cooling zone in which the extruded core material sags and is allowed to cool at ambient temperature, means for maintaining the length of the sagging extruded core material between a minimum and a maximum length, the cooling means feeding cooled and rigid core material to the crosshead die in a straight line, the extrudate from the crosshead die sagging between the crosshead die and the sizing means, and means maintaining the length of the extrudate between the crosshead die and the sizing means between a minimum and a maximum length.