Year: 1886

page_text: Date of Application, 23rd Oct., 1886.
Complete Left, 23rd July, 1887.
Complete Accepted, 26th Aug., 1887.
[Communicated from abroad by W. B. SPEAR, of the City of Philadelphia, State of
Pennsylvania, United States of America.]
I, PHILIP MIDDLETON JUSTICE of 55 and 56 Chancery Lane in the County of
Middlesex Fellow of the Institute of Patent Agents do hereby declare the nature
of this invention to be as follows:-
:-
The object of this invention is to prevent the adherence to the sheet of metal of
any impurities which it may take up from the flux, during its passage through the
coating bath to the delivery rolls.
In the process of galvanizing or otherwise coating sheets of iron steel or other metals
with the fluxes usually employed it has been found that the metal sheets after passing
through them into the molten zinc, retain on their under surface by reason of the
curve usually given to the guides, the chloride of zinc or other impurities which
when the plates are passed up in an approximately vertical direction to the delivery
rolls as is customary, remain on the surface and being pressed therein serve to spoil
the surface and consequently the value of the sheet.
The object of my invention is to remedy this defect and to this end my invention
consists in giving to the plates while in the bath a somewhat enlarged curve of travel
so as to extend it beyond the line of contact of the faces of the delivery rolls in
order that the plate when rising shall be turned for a short period with its former
lower surface upward, thus allowing the impurities to escape from the sheet and
rise to the surface while the plate turning into a vertical position is then passed
through the rolls and so out of the bath. For the purpose of keeping the impurities
rising from either surface of the plate clear of the delivery rolls, suitable slanting
deflecting plates are placed in the metal bath on either side of the latter and the rolls
and a portion or all of the guides may be so pivoted that they can be turned up out
of the bath for cleaning or repairs.
Dated this 23rd day of October 1886

page_text: A communication from abroad by W. B. SPEAR, of the City of Philadelphia, State of
Pennsylvania, United States of America.
I PHILIP MIDDLETON JUSTICE of 55 and 56 Chancery Lane in the County of
Middlesex Fellow of the Institute of Patent Agents do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The object of this invention is to prevent the adherence to the sheet of metal of
any impurities which it may take up from the flux, during its passage through the
coating bath to the delivery rolls.
In the process of galvanizing or otherwise coating sheets of iron, steel or other
metals with the fluxes usually employed it has been found that the metal sheets after
passing through them into the molten zinc retain on their under surface by reason
of the curve usually given to the guides, the chloride of zinc or other impurities,
which when the plates are passed up in an approximately vertical direction to the
delivery rolls as is customary, remain on the surface, and being pressed therein,
serve to spoil the surface and consequently the value of the sheet, while bubbles or
impurities of lighter specific gravity than the coating metal may adhere to the under
side of the plate and having no chance to rise or leave the plate prevent the coating
from coming into immediate contact therewith. The object of the invention is to
remedy this defect and to this end the invention consists in giving to the plates
while in the bath, a somewhat enlarged curve of travel, so as to extend it beyond
the line of contact of the faces of the delivery rolls in order that the plate when
rising shall be turned for a short period with its former lower surface upward, thus.
allowing the. impurities to escape from the sheet and rise to the surface, while the
plate, turning into a vertical position, is then passed through the rolls and so out of
the bath. For the purpose of keeping the impurities rising from either surface
of the plate clear of the delivery rolls, suitable slanting deflecting plates are placed
in the metal bath on either side of the latter and the rolls and a portion or all of the
guides may be so pivoted that they can be turned up out of the bath for cleaning or
repairs. In order that the invention may be clearly understood, reference is made to
the acompanying drawing which forms part of this specification and in which A is the
coating tank which may be of the shape indicated in the drawing, or of any other
convenient shape, and is heated by a furnace in any ordinary way. B, B, are the
guides between which the sheet of iron is placed, and by which its traverse through
the bath to the feed and delivery rolls is controlled. C, C are the delivery rolls
which are constructed of iron or other suitable material and are rotated through
their connection by bevel gearing to the main driving shaft D or in any other

page_text: suitable or convenient manner. E is a frame, pivotally connected at its outer end to
the main driving shaft, in one of the arms E' of which, the delivery rolls have their
bearings, and to the other arm of which, the guides are attached as shewn at e¹ e¹.
The pivoted connection with the shaft D of the frame permits the frame guides and
delivery rolls to be withdrawn from the tank when desired. F F are deflectors,
one of which (F) is attached at its outer end to one of the arms E' of the frame
and extends inwardly upon an incline to one of the guides as shewn. The other
deflector F¹ is attached at its inner end to one of the ties or braces of the guides as
shewn at f. In the form and construction of guides as heretofore employed it
will be known that the sheet of metal is conveyed from the lower part of the tank
and bath in a vertical line to the delivery rolls, the result being as already stated,
that the flux and impurities which are carried with the sheet have no opportunity to
escape, but are carried with it, to and through the delivery rolls. By extending the
guides and carrying the sheet of metal in the tank, beyond the line of contact of the
delivery rolls, as illustrated in the drawings, the flux and impurities being of lighter
specific gravity than the coating metal, escape from the sheet of iron, and are
deflected by the deflectors F F from the delivery rolls and rise to the surface of the
bath.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed as communicated to me by my
foreign correspondent I declare that what I claim is
1. In an apparatus for coating metals with metals, the combination with the
delivery rolls C, C of the curved guides B B, the latter extending to a point beyond
the vertical plane of the line of contact of the delivery rolls and then curved back
to present the sheet to said rolls substantially as set forth.
2. In apparatus for coating metals with metals the combination of the delivery
rolls C, C with the curved guides B, B and deflectors F F' substantially as and for
the purposes set forth.
Dated this 23rd day of July 1887