Method for joining two yarn pieces, and the device for carrying out the method

A method of splicing two yarn pieces, wherein the twist of one portion of each of said pieces is transferred by establishing an excess twist in the remainder of said pieces, and the loose fibers are removed from each of said pieces to form a substantially flat tuft of fibers at the end of each piece, said method comprising the steps of:

• disposing the fibers of each tuft substantially in a plane in an elongated shape of which the maximum width is substantially greater than the diameter of the yarn and is situated in a zone close to the base of the tuft, the width then decreasing until its end is reached;
• cutting the ends of the tufts at given lengths from their bases;
• disposing the two tufts adjacent to each other so that the end of each of them is opposite the widest zone of the other tuft;
• causing part of the fibers of the end zone of each tuft to penetrate into the other tuft;
• and
• re-establishing transferred twist in said tufts, the tuft fibers being disposed in a plane by placing said fibers in a gas stream adjacent to a flat support surface and guided by a channel, the edges of which laterally bound said support surface.

A method of splicing two yarn pieces, wherein the twist of one portion of each of said pieces is transferred by establishing an excess twist in the remainder of said pieces, and the loose fibers are removed from each of said pieces to form a substantially flat tuft of fibers at the end of each piece, said method comprising the steps of:

• disposing the fibers of each tuft substantially in a plane in an elongated shape of which the maximum width is substantially greater than the diameter of the yarn and is situated in a zone close to the base of the tuft, the width then decreasing until its end is reached;
• cutting the ends of the tufts at given lengths from their bases;
• disposing the two tufts adjacent to each other so that the end of each of them is opposite the widest zone of the other tuft;
• causing part of the fibers of the end zone of each tuft to penetrate into the other tuft;
• and
• re-establishing transferred twist in said tufts the fibers of each tuft being heated to a temperature of the order of 60.degree. to 90.degree. C. while said fibers are being disposed in a plane.

A method of splicing two yarn pieces, wherein the twist of one portion of each of said pieces is transferred by establishing an excess twist in the remainder of said pieces to form a substantially flat tuft of fibers at the end of each piece, said method comprising the steps of:

• disposing the fibers of each tuft substantially in a plane in an elongated shape of which the maximum width is substantially greater than the diameter of the yarn and is situated in a zone close to the base of the tuft, the width then decreasing until its end is reached;
• cutting the ends of the tufts at given lengths from their bases;
• disposing the two tufts adjacent to each other so that the end of each of them is opposite the widest zone of the other tuft,
• causing part of the fibers of the end zone of each tuft to penetrate into the other tuft, and
• re-establishing transferred twist in said tufts, air jets being directed perpendicular to the planes in which the fibers of the respective tufts are disposed and in proximity to the respective end zones of said tufts, and being directed such as to cause part of the fibers of each of said ends to penetrate into the fibers of the other end.