Method of and apparatus for winding a filament onto a bobbin

A yarn-winding apparatus comprising:

• an upright spindle centered on and rotatable about an upright axis and adapted to support a yarn-body core;
• a vertically displaceable yarn guide adjacent said spindle;
• means for feeding a yarn to be wound through said guide to said core on said spindle;
• primary drive means connected to said spindle and to said guide for simultaneously rotating said spindle and core about said axis at a relatively high rotation rate establishing a yarn-feed rate and for upwardly displacing said guide when a yarn package having a predetermined size is formed on said core;
• secondary drive means for lowering said guide to a level below said core after said instant and while said spindle continues to rotate to wind several turns of said yarn on said spindle below said core;
• and
• control means connected to said primary and secondary drive means for decreasing said yarn-feed rate to a relatively low rate prior to said instant and for thereafter regularly decreasing said yarn-feed rate to a standstill in accordance with a predetermined program starting at said instant and ending when said several turns have been wound on said spindle.

In a yarn-winding method wherein

• a yarn-body core is supported on an upright spindle adjacent a vertically displaceable yarn guide,
• a yarn to be wound passes through said guide to said core,
• said core and spindle are rotated and simultaneously said guide is displaced upwardly along said core to wind said yarn on said core at a yarn-feed rate until an instant when a yarn package having a predetermined size is formed on said core, and
• thereafter said guide is lowered to a level below said core while said spindle continues to rotate to wind several turns of said yarn on said spindle below said core, the improvement comprising the steps of:
• decreasing said yarn feed rate to a relatively low level prior to said instant;
• regularly decreasing said yarn-feed rate to a standstill in accordance with a predetermined program starting at said instant and ending when said several turns have been wound on said spindle;
• and
• displacing said guide at generally the same rate during decreasing of said yarn-feed rate.