Improvements in Apparatus or Machinery Used in Coating Metal Sheets with Metals or Alloys.
Year: 1897

page_text: Date of Application, 27th Apr., 1897-Accepted, 19th June, 1897
COMPLETE SPECIFICATION.
Improvements in Apparatus or Machinery Used in Coating Metal
Sheets with Metals or Alloys.
We, JOSEPH LAWRENCE HONHORST, residing at No. 8 Linden Street, and
RECHAB JOHN LLOYD, residing at No. 53 Chestnut Street, both in the City of
Niles, County of Trumbull, State of Ohio, United States of America, Inventors,
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 contemplates certain new and useful improvements in metal-
coating machines.
It is well known that sheets of metal which are subjected to coating processes
are not of uniform thicknesses and in consequence the action of the pressure-rolls
between which the sheets pass as they emerge from the bath of molten metal is not
the same on all sheets. Hence uniformity in results is rendered impossible and as
beretofore practiced much loss is occasioned by imperfect treatment of some sheets
of metal. The pressure-rolls through which these sheets are passed as they
emerge from the bath are usually adjusted to accommodate as near as possible
the average thickness of the metal sheets. In consequence plates of minimum
thickness are not properly treated, while those of maximum thickness serve to wear
out the rolls.
The object of our invention is to obviate these difficulties and provide simple
and, highly efficient means for effectively acting on all sheets of metal alike,
resulting in uniformity of results.
The invention will be hereinafter fully set forth and particularly pointed out in
the claims.
In the accompanying drawing:-
Figure 1 is a view in perspective of a portion of a galvanizing machine provided
with our improvements.
Figure 2 is an end view of two pressure-rolls showing our improvements.
Figure 3 is a detail.
Figure 4 is a view in perspective of a slight modification.
Figure 5 is a view of the hanger-frame with rollers removed.
Referring to the drawing, A, A', designate two pressure-rolls of a galvanizing
machine, the contacting faces of which are about on line with the surface of the
molten metal employed in the galvanizing or tinning process.
These rolls are on
the same horizontal plane and their journals a are supported by hanger-bars a¹, a¹,
of a frame a². Each of these hanger-bars is of U-form having a central depending
portion a3 and upper lateral extensions at. The two hanger-bars are connected
together and held in fixed relation by parallel cross-rods a³, which prevents any
movement of one hanger-bar independent of the other. Ordinarily the journals of
the rolls bear directly upon the horizontal member as of the depending portion a
of the hanger-bars, but as wear occurs, resulting in unevenness of operation, we
provide removable bearing blocks B. Each block is of L-shape and the lower
horizontal portion fits snug between upper parallel flanges 6 of a removable bar b',
which latter also has lower flanges which hug the sides of member a°. In this
way the blocks B can be readily replaced when worn and no injury is occasioned to

page_text: the hanger-bars. In lieu of employing the double-flanged bar 61, each block may
have its lower horizontal portion 6 provided with depending parallel flanges b* for
fitting against the sides of member a. (See Figure 4.) The space between the
vertical portions of the bearing-blocks is greater than the joint diameters of the
journals of the two rolls. This is so in order to allow of horizontal adjustment of
these rolls. To provide for an automatic 'adjustment of these rolls so as to cause
them to always bear with equal pressure against all plates or sheets that may be
subjected to their action, we employ upright arms C pivoted at their lower ends
to members a and normally held firm against the journal of the roll A¹ by
means of weights D which are connected by chains d to the upper ends of
these arms.
These chains are passed over small pulleys d'. In this way the
weights exert a constant pull on the upper ends of the pivoted arms, holding the
two rolls in close contact with each other, and yet allowing one of them, A¹, to
separate from the other, A, sufficient in each instance for the passage of the metal
sheets. Any variation in the thicknesses of the latter does not affect the results,
since all sheets are subjected to equal roll-pressure.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The combination with the frame and the two pressure rolls, of the arms
pivoted at their lower ends to said frame adjacent to one of said rolls, chains, or
the like, connected to the upper free ends of said arms, pulleys for said chains, and
weights on the ends of the latter, substantially as set forth.
2. The combination with the hanger-bars having vertical and horizontal
portions, and rolls having their journals supported by said hanger-bars, of right-
angular bearing blocks supported by said hanger-bars and interposed between
the horizontal and vertical portions of the latter and said journals, as set forth.
3. The combination with the hanger-bars having vertical and horizontal
portions, and rolls having their journals supported by said hanger-bars, of bearing
blocks extending over portions of the horizontal and vertical portions of said
hanger-bars, and flanges holding said bearing blocks on said horizontal portions of
said hanger-bars, substantially as set forth.
4. The combination with the hanger-bars having horizontal and vertical
portions, and rolls having their journals supported by said horizontal portions,
of bearing-blocks and flanged plates supported by the horizontal portions of said
hanger-bars, said plates holding said bearing blocks in position thereon, substan-
tially as set forth."
5. The combination with the hanger-bars, and the pressure-rolls, of the double-
flanged bars supported by said hanger-bars, the bearing-blocks held by said
flanged-bars, the arms pivoted at their lower ends to said hanger-bars and bearing
against one of said rolls, and the weighted chains connected to the upper ends of
said arms, substantially as set forth.
Dated this 7th 1
.
1007
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.