Improvements in Apparatus Used for Coating Sheets of Iron and Steel and Articles of Iron and Steel with Zinc or Alloys of Zinc or other Coating Metal or Alloy.
Year: 1886

page_text: Date of Application, 21st Oct., 1886.
Complete Left, 7th July, 1887.
Complete Accepted, 9th Aug., 1887.
Improvements in Apparatus Used for Coating Sheets of Iron and
Steel and Articles of Iron and Steel with Zinc or Alloys of Zinc
or other Coating Metal or Alloy.
I RICHARD HEATHFIELD of Lion Galvanizing Works Wiggin Street Birmingham
in the County of Warwick Manufacturer, do hereby declare the nature of this
Invention to be as follows:-
In a provisional specification filed by me in the Patent office on the 25th day of
June 1886 No. 8390, I have described apparatus for coating sheet iron with zinc
and other coating metals the said apparatus consisting in the addition to the apparatus
by which the coating is effected of rotary cylindrical brushes situated over the bath of
zinc or coating metal. The said brushes operate upon the coated sheet as it rises
from the bath removing superfluous coating metal from each face of the sheet and
incorporating more intimately the coating metal with the iron of the sheet. The
sheet after having been operated upon by the said brushes is or may be operated upon
by a pair of plain cylindrical rolls by the action of which the coated sheet receives an
improved finish.
My present invention consists in the adaptation and use of an additional pair or
pairs of finishing brushes in substitution of or in addition to the finishing rolls
described. The said additional brushes are made preferably of fine wire and are
somewhat similar to the brushes commonly called scratch brushes. The said finishing
brushes have for their function only the production of a smooth and polished surface
on the coated sheet. The removal of superfluous metal is effected by the brushes
which operate on the sheet as it emerges from the bath the finishing brushes con-
stituting my present invention removing no metal from the coated sheet but operating
upon it when the coating metal has solidified or nearly solidified and giving to the
solidified or nearly solidified coating metal a smooth and polished surface.
Although I find finishing brushes of fine wire answer well in practice yet I do not
limit myself thereto as emery rolls or other smoothing material in the form of rolls
and not injuriously affected by the heat of the coated sheet may be employed.
Instead of one pair of the said finishing brushes or rolls two or more pairs may be
employed.
Dad his co 1000

page_text: Improvements in Apparatus Used for Coating Sheets of Iron and
Steel and Articles of Iron and Steel with Zinc or Alloys of Zinc
or other Coating Metal or Alloy.
I RICHARD HEATHFIELD of Lion Galvanizing Works Wiggin Street Birmingham
in the County of Warwick Manufacturer do hereby declare the nature of my Invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
In a provisional specification filed by me in the Patent Office on the 25th day of
June 1886 No. 8390 and in the complete specification subsequently filed I have
described represented and claimed apparatus for coating sheet iron with zinc and
other coating metals the said apparatus consisting in the addition to the apparatus by
which the coating is effected of rotary cylindrical brushes situated over the bath of
zinc or coating metal. The said brushes operate upon the coated sheet as it rises
from the bath removing superfluous coating metal from each face of the sheet and
incorporating more intimately the coating metal with the iron of the sheet. The
sheet after having been operated upon by the said brushes is or may be operated upon
by a pair of plane cylindrical rolls by the action of which the coated sheet receives an
improved finish.
My present invention consists in the adaptation and use of an additional pair or
pairs of finishing brushes in substitution of or in addition to the finishing rolls
described. The said additional brushes are made preferably of fine wire and are
somewhat similar to the brushes commonly called scratch brushes. The said finishing
brushes have for their function only the production of a smooth and polished surface
on the coated sheet.
The removal of superfluous metal is effected by the brushes which operate on the
sheet as it emerges from the bath the finishing brushes constituting my present
invention operating upon the coated sheet when the coating metal has solidified or
nearly solidified and giving to the solidified or nearly solidified coating metal a
smoother and better finished surface that it would otherwise have.
The accompanying Drawing represents in transverse vertical section apparatus for
coating sheets of iron and steel and articles of iron and steel with zinc or alloys of
zinc or other coating metal the said apparatus being provided with the pair of
rotary cylindrical wire (or other) brushes for removing the superfluous zinc or
coating metal from the sheet or article described and claimed in the specification
of the patent before referred to in combination with the pair of rotary finishing
brushes according to my present invention.
a a is the bath of metallic zinc or other coating metal 6 6 the ordinary pair of
immersed rolls in the bath a and c c the additional pair of partly immersed rolls having
their axes in a horizontal plane ff are the rotary cylindrical brushes made of wire for

page_text: removing the superfluous metal from the sheet d as it rises from the bath a the said
sheet d travelling between the pairs of rolls b b and c c and being guided by the
guides e and eas represented. Above the said pair of rotary cylindrical brushes ff
is a pair of rotary cylindrical finishing brushes g g between which brushes the
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sheet d passes after it has been operated upon by the pair of brushes ff the said
finishing brushes g g operating upon the solidified or nearly solidified coating metal
on the opposite sides of the sheet and giving to the said sides a smoother and better
finished surface than they would otherwise have.
I prefer to make the finishing brushes gg of short bundles of wire arranged close
together instead of the long and separated bundles of wire which are used for con-
structing the brushes ff. I do not however limit myself to any particular material
for making the acting parts of the finishing brushes or to the method of building up
the said brushes.
The finishing wire (or other) brushes g g may be combined with finishing rolls of
the kind described and illustrated in the specification of the patent before referred to.
That is the pair of finishing brushes g g may be arranged above the pair of finishing
rolls the coated sheet from which the superfluous metal has been removed by the
brushes ff being in this case first operated upon by the finishing rolls and afterwards
by the finishing brushes. Or the finishing rolls may be situated above the finishing
brushes and the coated sheet be finally operated upon by the said finishing rolls.
Although I find finishing brushes of fine wire answer well in practice yet I do not
limit myself thereto as emery rolls or other smoothing material in the form of rolls
and not injuriously affected by the heat of the coated sheet may be employed.
Instead of one pair of the said finishing brushes or rolls two or more pairs may
be employed.
Although I have described and represented the rotary finishing brushes or emery
or smoothing rolls in conjunction with a pair of rotary cylindrical brushes for
removing the superfluous coating metal from the plate or article as it rises from the
bath yet the finishing brushes or emery or smoothing rolls described may be used
without the brushes for removing the superfluous coating metal but I prefer to carry
my invention into effect in the manner herein first described and illustrated in the
accompanying Drawing.
Having now particularly described and ascertained the nature of my invention and
the manner in which the same is to be performed I declare that I claim as my
invention of "Improvements in apparatus used for coating sheets of iron and steel
and articles of iron and steel with zinc or alloys of zinc or other coating metal
or alloy."
The combination with apparatus for the purpose described of a pair or pairs of
rotary cylindrical finishing brushes or emery rolls or other smoothing finishing rolls
for operating upon the coated sheet or article when the coating metal has solidified
or nearly solidified and thereby producing a smooth and better finished surface on
the coated sheet or article than it would otherwise have the said pair or pairs of
rotary cylindrical finishing brushes or emery rolls or other smoothing rolls being used
preferably in conjunction with a pair of rotary cylindrical brushes for removing the
superfluous coating metal from the sheet or article as it rises from the coating
bath substantially as hereinbefore described and illustrated in the accompanying
Drawing.