Process and apparatus for the application of a non-adhesive insulating tape to an electric coil winding

Apparatus for the application of a nonadhesive insulating strip to the winding of an electrical coil, in particular as intermediate, cover and/or shielding insulation, comprising:

• means for drawing a piece of a single sided adhesive tape from a first supply roll and applying said first piece to a first contact surface of a first pressure head;
• means for moving said first pressure head from a rest position into a working position, in which it adhesively bonds the adhesive tape to the winding of a coil;
• means for drawing a nonadhesive insulating strip from at least one second supply roll and bringing the nonadhesive insulating strip to a support surface of a second pressure head;
• means or subsequently displacing said second pressure head from its rest position into a first working position, in which it bonds the nonadhesive insulating strip to the adhesive tape;
• means for winding the adhesive tape together with the insulating strip onto the coil;
• means for cutting said nonadhesive insulating tape when said means for displacing said second pressure head subsequently pivots the second pressure head into a second working position, after which a residual of the nonadhesive insulating strip is wound together with the adhesive tape onto the coil;
• and,
• means for cutting the adhesive tape so that said means for winding winds a projecting end of the adhesive tape onto the coil.