FREE BOOKS

Author's List




PREV.   NEXT  
|<   30   31   32   33   34   35   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   53   54  
55   56   57   58   59   60   61   62   63   64   65   66   67   68   69   70   71   72   >>  
tance is "reach." On emerging from the drawing rollers, the combed slivers pass between slicking rollers, and then approach the sliver plate which bridges the gap between the slicking rollers and the delivery rollers, and by means of which plate two or more individual slivers are diverted at right angles, first to join each other, and then again diverted at right angles to join another sliver which passes straight from the drawing rollers and over the sliver plate to the guide of the delivery rollers. It will thus be seen that a number of slivers, each having been drawn out according to the degree of draft, are ultimately joined to pass through a common sliver guide or conductor to the nip of the delivery rollers, and thence into a sliver can. The push-bar drawing illustrated in Fig. 17, or some other of the same type, is often used as the first drawing frame in a set. With the exception of the driving pulleys, all the gear wheels are at the far end of the frame, and totally enclosed in dust-proof casing. The set-on handles, for moving the belt from the loose pulley to the fast pulley, or _vice versa_, are conveniently situated, as shown, and in a place which is calculated to offer the least obstruction to the operative. The machines are made with what are known as "two heads" or "three heads." It will be seen from the large pressing rollers that there are two pairs; hence the machine is a "two-head" drawing frame. The slivers from the first drawing frame are now subjected to a further process of doubling and drafting in a very similar machine termed the second drawing frame. The pins in the gills for this frame are rather finer and more closely set than those in the first drawing frame, but otherwise the active parts of the machines, and the operations conducted therein, are practically identical, and therefore need no further description. It should be mentioned, however, that there are different types of drawing frames, and their designation is invariably due to the particular manner in which the fallers are operated while traversing the closed circuit. The names of other drawing frames appear below. Spiral or screw gill; Open link chain; Rotary; Ring Carrier Circular. For the preparation of slivers for some classes of yarn it is considered desirable to extend the drawing and doubling operation in a third drawing frame; as a rule, however, two frames are considered sufficient for most classes
PREV.   NEXT  
|<   30   31   32   33   34   35   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   53   54  
55   56   57   58   59   60   61   62   63   64   65   66   67   68   69   70   71   72   >>  



Top keywords:

drawing

 

rollers

 

sliver

 

slivers

 

frames

 

delivery

 

doubling

 

pulley

 

diverted

 
considered

machine
 

machines

 

slicking

 
angles
 

classes

 

operations

 
active
 

identical

 
practically
 

conducted


process
 

description

 

drafting

 

subjected

 

similar

 

termed

 

closely

 

Carrier

 

Circular

 

Rotary


preparation

 

sufficient

 

operation

 
desirable
 

extend

 

Spiral

 

invariably

 
designation
 

mentioned

 
manner

fallers
 
pressing
 

circuit

 

closed

 

operated

 

traversing

 

moving

 

ultimately

 
joined
 

common