Yarn crimping apparatus

Claim 1

A YARN CRIMPING APPARATUS COMPRISING IN COMBINATION, (A) A SOURCE OF SUPPLY OF A CONTINUOUS MOLECULARLY ORIENTABLE SYNTHETIC FILAMENT YARN MADE FROM A THERMOPLASTIC POLYMER (B) A DRIVEN DENTICULATED CRIMP ROLL MEANS ADAPTED TO IMPART LATENT CRIMP STRESSES TO SAID YARN NORMALLY HAVING ENGAGEMENT THEREWITH, (C) DRIVEN FEED ROLL MEANS FOR ADVANCING SAID YARN FROM SAID SOURCE OF SUPPLY TO SAID DENTICULATED CRIMP ROLL MEANS AT ONE RATE OF SPEED, (D) SAID DENTICULATED CRIMP ROLL MEANS BEING ADAPTED TO ADVANCE SAID YARN AT AN INCREASED RATE OF SPEED AS COMPARED TO SAID ONE RATE OF SPEED SO AS TO STRETCH THE YARN BETWEEN SAID FEED ROLL MEANS AND SAID DENTOCULATED CRIMP ROLL MEANS, (E) A HEATED DRAW PIN MOUNTED INTERMEDIATE SAID FEED ROLL MEANS AND SAID DENTICULATED CRIMP ROLL MEANS FOR LOCALIZING THE STRETCHING OF SAID YARN THEREBETWEEN AND FOR HEATING THE YARN PRIOR TO ITS TRAVEL TO SAID DENTICULATED CRIMP ROLL MEANS, (F) A SEPARATOR ROLL MOUNTED NEAR AND AT AN ANGLE TO SAID DENTICULATED CRIMP ROLL MEANS FOR PREVENTING SUPERIMPOSING OF YARN NORMALLY TRAVELING ENGAGINGLY AROUND SAID SEPARATOR ROLL AND SAID DENTICULATED CRIMP ROLL MEANS, (G) A PNEUMATIC ACTUATOR YIELDABLY CONNECTED TO SAID DENTICULATED CRIMP ROLL MEANS AND ADAPTED TO ALTERNATELY POSITION THE LATTER INTO ONE POSITION AND INTO A SECOND POSITION, (H) AN ELECTRO-PNEUMATIC VALVE MEANS CONNECTED TO SAID PNEUMATIC ACTUATOR, (I) A RESERVOIR NORMALLY SUPPLIED WITH AIR UNDER PRESSURE CONNECTED TO SAID ELECTRO-PNEUMATIC MEANS, (J) AN ELECTRIC TIMING MEANS CONNECTED TO A SOURCE OF ELECTRICAL ENERGY FOR ENERGIZING SAID ELECTRO-PNEUMATIC VALVE MEANS FOR SUPPLYING AIR UNDER PRESSURE TO SAID PNEUMATIC ACTUATOR TO CAUSE THE LATTER TO POSITION SAID DENTICULATED CRIMP ROLL MEANS INTO SAID ONE POSITION FOR APPLYING LATENT CRIMPS TO SAID YARN ADVANCING THERETHROUGH AND FOR DE-ENERGIZING SAID ELECTRO-PNEUMATIC VALVE MEANS FOR CUTTING OFF THE FLOW OF AIR UNDER PRESSURE FROM SAID RESERVOIR AND VENTING SAID PNEUMATIC ACTUATOR TO POSITION AND DENTICULATED CRIMP ROLL MEANS TO SAID SECOND POSITION FOR PROVIDING UNCRIMPED SECTIONS IN SAID YARN, AND (K) DRIVEN YARN TAKE-UP MEANS FOR TAKING UP AND SAID LATENTLY CRIMPED YARN FROM SAID DENTICULATED CRIMP ROLL MEANS.