Collecting and bundling device for use with fiber-drafting machine

Abstract

This invention relates to an apparatus for a fiber drafting machine which collects and bundles drafted fibers together using airflow. A double structured pipe N is installed on the fiber drafting machine to allow the fibers to be gathered together using airflow. The drafting machine is equipped with 2 zones, Z 1 and Z 2 . Z 1 has a pair of front rollers R 1 and a pair of delivery rollers R 4 located on the downstream of R 1 , and a double pipe structured collecting nozzle N is located between the rollers R 1 and R 4 . This collecting nozzle N consists of an inner nozzle N 1 , which contains the inner space, or fiber path 5 for the fibers to go through, and an outer nozzle N 2 , which is located outside of the inner nozzle N 1 . There is a loop-like space in the area between N 1 and N 2 . This loop space will be used as an airflow path 1, and its design will allow for low pressure airflow to enter from the outside. Nozzle entrance 2 is located on the upstream side of inner nozzle N 1 . When you close the upstream of air flow path 1, the downstream side opening of air flow path 1 will have its cross sectional area rapidly reduced. When this occurs the airflow path 1 will merge with the fiber path 5.

What is claimed is:  
     
         1 . A collecting and bundling device which can be installed onto a textile drafting machine, comprising: 
 a main draft zone,    a break draft zone,    a double pipe collecting nozzle between a pair of front rollers in the main draft zone,    a pair of delivery rollers at the downstream,    said collecting nozzle having both an inner nozzle and an outer nozzle, the inner nozzle having an inner space to allow the fibers to pass therethrough,    a loop-like space between the inner and the outer nozzle,    said loop-like space forming a path for low pressure airflow which enters from the outside,    whereby the upstream airflow path is closed, therefore, and the inner nozzle's opening on the upstream side provides an entrance for the fibers, while the opening of the airflow path has its cross sectional area rapidly reduced in size to allow the fibers to merge.    
     
     
         2 . The fiber collecting and bundling device according to  claim 1  wherein both the inner and outer nozzles have grooves located along the airflow path on the surface of the inner circumference.  
     
     
         3 . The fiber collecting and bundling device of  claim 1  wherein the nozzle has a fiber path opening for the fibers to exit, with its cross sectional area being rapidly reduced.  
     
     
         4 . The fiber collecting and bundling device of  claim 1  wherein the collecting nozzle is located close to the nip point of a pair of delivery rollers.  
     
     
         5 . The fiber collecting and bundling device of  claim 1  wherein the collecting nozzle and a pair of delivery rollers together form a collecting nozzle unit.  
     
     
         6 . The fiber collecting and bundling device of  claim 5  having a collecting nozzle unit with a carrier roller which conveys the revolutions from front rollers to the delivery rollers.