Year: 1885

page_text: Coating Ser
WICK BFFCO
We, FRIEDRICH WILHELM KOFFLER, director of iron works, and EDUARD
ZWIERZINA, proprietor of iron works, both of Unter St. Veit, near Vienna, in
the Empire of Austria do hereby declare the nature of this invention to be as
follows:-
According to this invention, the sheet-metal on its being withdrawn from the
bath of melted zinc, is freed from superfluous zinc by rotary cylindrical wire
brushes bearing on either surface of the sheet.
-
In carrying out the invention, the cylindrical brushes are suspended by means
of the longer arms of angular levers, on two horizontal driving shafts extending
parallel with the metal-sheets while being withdrawn from the bath and by means
of driving belts running over pulleys keyed to the driving shafts and shafts of the
brushes, these latter are rotated from above towards each other. The shorter arms
of the angular levers are moveably connected to each other by means of a pivot
and when a link or rod suspended on this pivot is pulled down, it causes the
rotary brushes to bear upon the sheet-metal rising between them.
G. F. REDFERN,
Agent for the Applicants.

page_text: Improvements in the Process of and Means for Zincing or
Coating Sheet-metal with Zinc.
We FRIEDRICH WILHELM KOFFLER, director of iron works and EDUARD
ZWIERZINA, proprietor of iron works, both of Unter, St Veit, near Vienna in
the Empire of Austria 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 :-
This invention relates to coating sheet-metal more particularly sheet-iron and
sheet-steel with zinc by the hot process, the invention having for object to free
each plate from superfluous zinc as the plate is withdrawn from the bath of melted
zinc so as to leave upon the plate only a thin uniform layer of zinc without knots
or drops such as are unavoidably formed on plates coated by hitherto known
methods of zincing. By removing this excess of zinc the coated sheets are not
only rendered more durable but are less liable to crack and burst when they are
afterwards punched or otherwise worked; moreover the sheets of metal treated in
the manner hereinafter described while being coated are better able to receive and
retain a subsequent coating of nickel than is the case with ordinary zinc-coated
sheet-metal.
In carrying out our invention the excess of melted zinc is removed by means of
rotary cylindrical brushes and in order to cause the said brushes to move simul-
taneously towards the plate under treatment while the plate is being withdrawn
from the zinc bath, the brushes are fixed to downwardly extending arms of angular
levers the other inwardly extending arms of which are jointed to each other and
adapted to be raised and lowered.
In order to enable our invention to be fully understood we will proceed to
describe the same by reference to the accompanying drawing in which figure 1
is a vertical cross-section of an apparatus adapted for coating sheet-metal with zinc
according to our invention. Figure 2, is a side elevation of the same partly in
section. Similar letters in both the figures represent similar parts.
In the melting-furnace a, is a trough b, for the melted zinc in which the plate c,
to be coated is immersed, the plate being suspended by means of a hook and the
said plate having been cleaned in the usual manner before being subjected to the
coating operation. After the plate c, has been immersed in the metal bath for
the required time it is withdrawn and the two rotary cylindrical brushes d, made
of steel wire or of other suitable material are immediately caused to bear upon both
surfaces of the plate. These brushes are by preference rotated in the direction
indicated by the arrows in figure 1, that is to say, towards each other from the top
as the excess of zinc will be thereby caused to flow back into the bath. By means
of a suitably arranged casing, not shewn in the drawing, the melted zinc which is
splashed or thrown about by the brushes can be collected and conducted back into
the trough b.
In order that both of the brushes d, shall be caused to simultaneously approach
and bear upon the plate c, under treatment one of the bearings f³, of each of the

page_text: shafts g, of the brushes d, is formed in the lower end of the longer downwardly
extending arm f¹, of its respective angular lever f', f³, while the two other
bearings f, are formed in the lower ends of arms f¹, as shewn in figure 2; the
shorter arms f³, of the angular levers ƒ¹ ƒ³ extend laterally towards each other
and are connected together by means of a pivot or bolt h, fixed to one of the
arms f, and projecting through a slot f, formed at the end of the other arm f³.
On the bolt h, is mounted a link or rod i, the lower end of which is jointed by
means of a pivot or bolt 2, to one end of a lever k, having its pivot or fulcrum on
a standard j, of the apparatus When the handle of the lever k, is forced down the
link or rod i, will cause the arms f³, to rise and the brushes d, will approach the
plate c; When the plate c, has been raised beyond the brushes d, the handle is
released and the brushes will assume their former position by gravity.
In order to communicate the required motion to the brushes d, the arms f¹,
which carry them are loosely mounted by means of bosses or naves f, upon revolving
shafts e; by means of pulleys e¹ and g¹, keyed to the shafts 6, and g, respectively
and of corresponding driving belts thereon rotary motion is transmitted from the
shafts e, to the shafts g, of the brushes d.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. In coating sheet-metal with zinc by the hot process the freeing the metal
sheet from superfluous zinc as it is withdrawn from the zinc bath by means of
rotary cylindrical brushes bearing upon the said sheet substantially as herein-
before described.
2. In apparatus for freeing sheet-metal which is being coated with zinc, from
superfluous zinc the combination with two rotating shafts, arranged parallel to
the sheet under treatment and above each side of the same, of the four arms
of equal length mounted in pairs on the said shafts the two cylindrical brushes
suspended by their shafts to the said links the means for transmitting motion from
the driving shafts to the shafts of the brushes and the inwardly extending arms,
rigidly connected to one of the two pairs of arms and adapted to be moved upwards
simultaneously substantially as hereinbefore described and represented in the
accompanying drawing.
D
1
...
1000