US 4,047,372 A · Pneumatic threader for twisting apparatus

Abstract

A pneumatic threader for a twisting apparatus has a nozzle formed with a counterbore so that the nozzle can be fitted over the end of the inlet tube of the twisting apparatus. In addition this nozzle is formed with a slot opening toward the tube and extending beyond the counterbore so that a filament engaged in this slot can freely pass into the tube. The slot may extend helically up around the tube so that automatic clamping of the filament is effected when it reaches the end of the helix. It is also possible to form the slot parallel to the air passage in the nozzle and to provide a clamping member for holding the filament end in the upper portion of this slot. To this end a lost-motion coupling may be provided between the valve-operating trigger of the pneumatic threading apparatus and the operating lever for opening of the clamp shortly after air flow has been started.

Claims9

Dependent claims

In combination with a tube having an open filament-receiving end, a threading apparatus comprising:

a nozzle formed with a passage and having a formation interfittable with said open end with said passage directed into said open end, said nozzle being formed at said passage with a thread-receiving slot opening toward said tube;
and
means for directing a stream of gas through said passage past said slot and into said open end when same is fitted to said formation, whereby a filament in said slot can be blown by said stream into said open end and thereafter said nozzle can be disengaged from said open end with said filament sliding out of said slot, said slot extending helically in said nozzle past said formation.

Dependencies are inferred from the claim text.

Pneumatic threader for twisting apparatus

Life of this patent

Pneumatic threader for twisting apparatus

Life of this patent

Abstract

Claims9