﻿18 
  MENHADEN 
  INDUSTRY 
  OF 
  THE 
  ATLANTIC 
  COAST. 
  

  

  against 
  the 
  head 
  and 
  the 
  reniaming 
  oil 
  and 
  water 
  forced 
  out 
  between 
  

   the 
  staves. 
  The 
  oil 
  and 
  water 
  are 
  prevented 
  from 
  spattering 
  over 
  

   the 
  workmen 
  when 
  the 
  pressure 
  is 
  apphed 
  by 
  sliields 
  of 
  metal 
  or 
  

   other 
  material 
  built 
  around 
  the 
  curb, 
  and 
  as 
  it 
  is 
  forced 
  out 
  it 
  runs 
  

   through 
  troughs 
  to 
  the 
  oU 
  room. 
  When 
  the 
  pressure 
  is 
  relaxed, 
  

   the 
  curb 
  slowly 
  descends 
  to 
  its 
  former 
  position 
  on 
  the 
  rails 
  and 
  is 
  

   pushed 
  from 
  beneath 
  the 
  head 
  and 
  the 
  bottom 
  released 
  by 
  the 
  lever 
  

   referred 
  to 
  above. 
  The 
  core 
  is 
  held, 
  as 
  has 
  been 
  stated 
  above, 
  and 
  

   the 
  pressed 
  mass 
  of 
  fish 
  drops 
  through 
  an 
  opening 
  in 
  the 
  floor 
  to 
  the 
  

   room 
  below. 
  Another 
  form 
  of 
  curb 
  differing 
  shghtly 
  in 
  construction 
  

   from 
  the 
  one 
  just 
  described 
  is 
  in 
  use 
  in 
  some 
  of 
  the 
  plants. 
  The 
  iron 
  

   bands 
  surrounding 
  it 
  are 
  fitted 
  with 
  latches, 
  which 
  open 
  to 
  release 
  the 
  

   hard 
  cake 
  remaining 
  after 
  the 
  pressing, 
  and 
  the 
  diameter 
  of 
  the 
  

   cyhnder 
  is 
  the 
  same 
  from 
  top 
  to 
  bottom. 
  

  

  SCREW 
  PRESS. 
  

  

  When 
  the 
  screw 
  press 
  is 
  used 
  the 
  digested 
  fish 
  are 
  conveyed 
  

   directly 
  from 
  the 
  cooker 
  to 
  the 
  press, 
  thus 
  eliminating 
  the 
  draining 
  

   tanks 
  referred 
  to 
  as 
  being 
  used 
  in 
  connection 
  with 
  the 
  curbs 
  and 
  

   effecting 
  a 
  saving 
  in 
  time 
  and 
  labor. 
  The 
  modern 
  screw 
  press 
  

   consists 
  of 
  a 
  horizontal 
  tapered 
  screw 
  built 
  up 
  on 
  a 
  hollow 
  shaft 
  

   fitting 
  closely 
  and 
  rotating 
  in 
  a 
  similarly 
  tapered 
  steel-slatted 
  curb 
  

   with 
  a 
  hopper-shaped 
  entrance 
  15 
  by 
  29 
  inches 
  in 
  size, 
  into 
  which 
  

   the 
  fish 
  are 
  fed 
  from 
  the 
  conveyor. 
  A 
  section 
  of 
  the 
  tpp 
  of 
  the 
  curb 
  

   may 
  be 
  removed, 
  should 
  the 
  shaft 
  or 
  screw 
  require 
  repairing 
  or 
  

   cleaning. 
  The 
  pressure 
  is 
  caused 
  by 
  a 
  gradual 
  decrease 
  in 
  the 
  

   size 
  of 
  the 
  screw 
  and 
  curb, 
  and 
  the 
  material 
  must 
  move 
  toward 
  the 
  

   small 
  end 
  of 
  the 
  press 
  as 
  the 
  screw 
  turns; 
  it 
  can 
  not 
  turn 
  with 
  the 
  

   screw 
  nor 
  slip 
  on 
  the 
  curb. 
  The 
  hollow 
  shaft 
  is 
  provided 
  with 
  

   perforations 
  through 
  which 
  steam 
  may 
  be 
  introduced 
  directly 
  into 
  

   the 
  material 
  while 
  it 
  is 
  being 
  pressed; 
  this 
  is 
  a 
  decided 
  advantage, 
  

   in 
  that 
  it 
  keeps 
  the 
  material 
  hot 
  and 
  soft, 
  a 
  condition 
  which 
  permits 
  

   a 
  more 
  thorough 
  separation 
  of 
  the 
  liquid 
  from 
  the 
  solid 
  matter. 
  

   The 
  drainage 
  is 
  both 
  internal 
  and 
  external, 
  the 
  drainage 
  space 
  

   between 
  the 
  slats 
  of 
  the 
  curb 
  being 
  supplemented 
  by 
  the 
  drainage 
  

   holes 
  in 
  the 
  shaft. 
  

  

  One 
  form 
  of 
  screw 
  press 
  is 
  18 
  feet 
  long, 
  or 
  23 
  feet 
  including 
  frame 
  

   and 
  gearing, 
  has 
  a 
  capacity 
  of 
  80,000 
  to 
  100,000 
  fish 
  per 
  hour, 
  and 
  

   costs 
  $5,000. 
  Another 
  is 
  12 
  feet 
  long, 
  or 
  17 
  feet 
  including 
  frame 
  

   and 
  gearing, 
  with 
  a 
  capacity 
  of 
  about 
  40,000 
  fish 
  per 
  hour, 
  and 
  costs 
  

   $3,500. 
  The 
  larger 
  press 
  requhes 
  a 
  50-horsepower 
  engine, 
  and 
  the 
  

   smaller 
  one 
  may 
  be 
  operated 
  with 
  an 
  engine 
  of 
  35 
  horsepower. 
  

   Another 
  press 
  very 
  "similar 
  to 
  the 
  above 
  is 
  fitted 
  with 
  a 
  cone 
  capable 
  

   of 
  longitudinal 
  adjustment 
  on 
  the 
  hollow 
  shaft 
  and 
  rotating 
  with 
  

   the 
  same. 
  The 
  opening 
  through 
  which 
  the 
  pressed 
  fish 
  are 
  discharged 
  

  

  