Vacuum latchtack throat plate with a vacuum generating apparatus

A throat plate comprising in the direction of a feed line:

• a body having a first internal bore beginning at an edge of the body and extending through a portion of the body,
• a channel formed in a lower surface of the body and having one end coupled with the first internal bore;
• and
• a stitch tongue comprising a back edge and a second internal bore beginning at the back edge and extending longitudinally to the other end of the channel.

A vacuum generating system for applying vacuum to a stitch tongue on a throat plate, comprising:

• said throat plate having a front edge and a side edge;
• said stitch tongue integrally formed with said throat plate and extending in a direction generally parallel to its side edge;
• a vacuum passageway formed in said throat plate, said vacuum passageway having a first opening in said stitch tongue and a second opening in said throat plate at a location remote from said stitch tongue;
• a source of positive pressure gas;
• a vacuum generator having an input port, an output port and a vacuum port;
• a valve for coupling the source to the input port of the vacuum generator;
• and
• a continuous non interrupted conduit coupling the vacuum port of the vacuum generator to said second opening in said throat plate at a location remote from said stitch tongue.

A vacuum latchtack throat plate system comprising:

• a body having in the direction of a feed line a front edge and a side edge;
• a stitch tongue comprising a back edge, wherein the stitch tongue is integrally formed with the body, the stitch tongue further comprising an internal bore beginning at the back edge and extending longitudinally;
• a conduit coupling the internal bore to the body;
• and
• a vacuum source coupled to the conduit, wherein the vacuum source comprises a vacuum generator having an input port, an exhaust port and a vacuum port coupled to the conduit.