Abstract 1. A METHOD OF MANUFACTURING AN ELECTRICALY ONDUCTIVE PLASTIC TUBE COMPRISING THE STEPS OF: MOLDING A PAIR OF PREFORM TUBE HALVES FROM AN EXTRUDABLE, SINTERABLE PLASTIC MATERIAL INCORPORATING A VOLATILE LUBRICANT, EACH PREFORM BEING A RELATIVELY THICK WALLED SEMI-CYLINDRICAL MEMBER HAVING A LONGITUDINAL SEMI-CYLINRICAL BORE, THE BORE OF ONE OF SAID PREFORMS HAVING A LARGER RADIUS THAN THE OTHER, APPLYING A CONDUCTIVE COATING COMPRISING EXTRUDABLE, SINTERABLE PLASTIC MATERIAL INCORPORATING FROM 3 TO 25% BY WEIGHT CONDUCTIVE FILLER AND VOLATILE LUBRICANT WITHIN THE BORE OF LARGER RADIUS TO SUCH A THICKNESS AS TO REDUCE THE BORE TO THE SAME SIZE AS THE BORE OF THE OTHER PREFORM, PLACING THE TWO PREFORMS IN FACE TO FACE RELATION TO DEFIN A CYLINDER AND EXTRUDING THE SAME THROUGH A DIE TO FORM A TUBE, DRIVING OFF SAID LUBRICANT, AND THEREAFTER SUBJECTING SAID TUBE TO ELEVATED TEMPERATURES TO EFFECT SINTERING OF SAID TUBE.
A METHOD OF MANUFACTURING AN ELECTRICALY ONDUCTIVE PLASTIC TUBE COMPRISING THE STEPS OF: MOLDING A PAIR OF PREFORM TUBE HALVES FROM AN EXTRUDABLE, SINTERABLE PLASTIC MATERIAL INCORPORATING A VOLATILE LUBRICANT, EACH PREFORM BEING A RELATIVELY THICK WALLED SEMI-CYLINDRICAL MEMBER HAVING A LONGITUDINAL SEMI-CYLINRICAL BORE, THE BORE OF ONE OF SAID PREFORMS HAVING A LARGER RADIUS THAN THE OTHER, APPLYING A CONDUCTIVE COATING COMPRISING EXTRUDABLE, SINTERABLE PLASTIC MATERIAL INCORPORATING FROM 3 TO 25% BY WEIGHT CONDUCTIVE FILLER AND VOLATILE LUBRICANT WITHIN THE BORE OF LARGER RADIUS TO SUCH A THICKNESS AS TO REDUCE THE BORE TO THE SAME SIZE AS THE BORE OF THE OTHER PREFORM, PLACING THE TWO PREFORMS IN FACE TO FACE RELATION TO DEFIN A CYLINDER AND EXTRUDING THE SAME THROUGH A DIE TO FORM A TUBE, DRIVING OFF SAID LUBRICANT, AND THEREAFTER SUBJECTING SAID TUBE TO ELEVATED TEMPERATURES TO EFFECT SINTERING OF SAID TUBE.
Claim 2
Independent Claim
147 words
A METHOD OF MANUFACTURING AN ELECTRICALY ONDUCTIVE PLASTIC TUBE COMPRISING THE STEPS OF: MOLDING A PAIR OF PREFORM TUBE HALVES FROM AN EXTRUDABLE, SINTERABLE PLASTIC MATERIAL INCORPORATING A VOLATILE LUBRICANT, EACH PREFORM BEING A RELATIVELY THICK WALLED SEMI-CYLINDRICAL MEMBER HAVING A LONGITUDINAL SEMI-CYLINRICAL BORE, THE BORE OF ONE OF SAID PREFORMS HAVING A LARGER RADIUS THAN THE OTHER, APPLYING A CONDUCTIVE COATING COMPRISING EXTRUDABLE, SINTERABLE PLASTIC MATERIAL INCORPORATING FROM 3 TO 25% BY WEIGHT CONDUCTIVE FILLER AND VOLATILE LUBRICANT WITHIN THE BORE OF LARGER RADIUS TO SUCH A THICKNESS AS TO REDUCE THE BORE TO THE SAME SIZE AS THE BORE OF THE OTHER PREFORM, PLACING THE TWO PREFORMS IN FACE TO FACE RELATION TO DEFIN A CYLINDER AND EXTRUDING THE SAME THROUGH A DIE TO FORM A TUBE, DRIVING OFF SAID LUBRICANT, AND THEREAFTER SUBJECTING SAID TUBE TO ELEVATED TEMPERATURES TO EFFECT SINTERING OF SAID TUBE.