An Improved Machine or Apparatus for the Manufacture of Metal Lathing.
Year: 1890

page_text: Date of Application, 19th Aug., 1890-Accepted, 15th Nov.,
1890
COMPLETE SPECIFICATION.
[Communicated from abroad by WALTER WHITEFIELD BOSTWICK, of 38, Park Row,
New York, United States of America, Engineer.]
An Improved Machine or Apparatus for the Manufacture of
Metal Lathing.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex 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 :-
My invention relates to an improved machine or apparatus for the manufacture of
metal lathing of the kind or class described in the Specification accompanying the
applications for Letters Patent No. 17841 A.D. 1889 and No. 9536 A.D. 1890. My
said improved apparatus or machine comprises a series of punching discs secured
together with intermediate collars, to form a punching roll, and corresponding
recessed discs secured together, with intermediate shearing dises, to form a
die-roll.
The collars of the punching-roll are formed with ✓ or other shaped projections, and
the collars of the die-roll with corresponding depressions for producing corrugations
on the metal casting.
In the accompanying drawings,
Figure 1 is an elevation of two rolls, with portions of their journals, constructed
according to my invention.
Figure 2 is a transverse section of the said rolls, showing also the plate strippers
hereinafter described and an elevation of the journal bearings.
Figure 3 is a plan of the bottom roll, strippers and stripper plates;
Figures 4 and 5 are front and side elevations respectively of one of the punching
discs ;
Figures 6 and 7 are front and side elevations of one of the recessed discs ;
and
Figures 8 and 9 are front and side elevations of one of the shearing discs and,
Figure 10 is a section of a portion of the discs shown in Figures 5, 7 and 9,
with a piece of sheet metal bent prior to the shearing operation of the punching
disc, and
Figure 11 is a plan,
Figure 12 an edge view, and
Figure 13 an end view of a portion of sheet metal lathing as manufactured by my
improved machine.
Referring to Figures 11 to 13 A indicates the metallic lathing manufactured by my
improved machine, baving strips or loops A¹ formed by cutting parallel slits B in the
metal and bending the loops outward, and having also the edges of the slits bent
upwards and corrugations D formed in the body of the metal all as described in the
aforesaid Specifications.
Each punching disc a shown separately in Figures 4 and 5 consists preferably of a
plate of steel of the same thickness as the width of the aperture B Figure 11 and
provided upon its periphery with a series of teeth b adapted, each, to form one of the said
apertures. These discs are firmly secured in any suitable manner upon a spindle c
(Figure 1), to form a punching roll, along with a series of intermediate or alternating
collars d, above which the teeth b project.
The die-roll consists of a series of discs e of the same thickness as the discs a, and
notched each upon its periphery with a series of recesses f corresponding with the
teeth b. These discs are firmly secured together, to form a die-roll, upon a spindle g,

page_text: with a series of intermediate or alternating collars ½ of the same diameter as the
recessed discs.
The collars d may be formed with circumferential V or other shaped projections d'
and the collars h. with corresponding depressions. In some cases I form the said
projections d and depressions either parallel to the axis of the rolls or at an
angle thereto.
The rolls thus composed are mounted in bearings i and j Figure 2 in a suitable
frame and rotated by any suitable means, the teeth 6 entering the recesses f and
the projections d' entering the depressions ¹ as shown in Figures 1 and 2.
It is obvious that if a thin sheet of metal be passed between the said compound
rotating rollers, the teeth 6 will operate against the collars h, to shear the edges of
the strips A¹ from the sheet, and to force the strip downward into the recess, stretching
it longitudinally and shaping it as desired.
The collars are shown formed with a bevel Figure 10 upon their edges
adjacent to the discs e to bend the edges C at the sides of the apertures B inward
toward the strip. Such bevel is preferably formed at intervals only corresponding
with the recesses f, but may be extended all the way around the collars, in which
case, however, it has no effect except where the teeth b press the sheet metal into
contact therewith. The bending is effected by the pressure of the teeth before the
latter come into shearing contact with the collars h, as is clearly indicated in
Figure 10 where the tooth is shown pressed upon the sheet metal sufficiently
to bend the metal inward against the bevel 7. The continued movement of the
tooth 6 into the recess will obviously shear the lateral edges of the strip and force
it into the recess as desired.
As shown in Figures 1 and 3, the discs of each roll are arranged with their teeth
and recesses alternated, so as to form the apertures B in the sheet A in diagonal lines;
but the section in Figure 2 shows only one pair of the opposed discs, and does not
show the alternate arrangement of the teeth and recesses, as it would greatly confuse
the drawings.
To prevent the sheet from clinging to the teeth 6 or to the recesses in the die-roll,
a series of narrow strippers are fitted to the collars between the discs a or e. Two
series of strippers m, m¹, are provided upon the lower side of the sheet, one on each
side the die-roll, and one series of strippers n is provided on the clearance side of the
punching roll, the rolls rotating in the direction indicated by the arrows o in Figure 2.
The sheet, which clings strongly to the recesses or to the teeth b, is thus prevented
from wrapping round either of the rolls.
To facilitate the removal of the strippers, each series is secured upon a bar
is attached to a lug upon the frame k.
which
I have found that a slight variation in the thickness of the sheet metal requires a
separate and rigid adjustment of the punching-roll and for this purpose I sustain the
bearings of the spindle c upon the frame k with intermediate packing plates r.
The bearing i is attached to the frame by bolts s which clamp the same firmly
to the frame upon the packing plates, and thus hold the punching roll very rigidly
when in operation.
It is obvious that the punching discs a and the recessed discs e are respectively of
uniform character and the several discs of each set may therefore be made all at once
by suitable milling or cutting tools.
The punching discs and the collars h, against the edges of which the teeth 6 operate
to shear the sheet metal may be separately bardened, and when clamped upon their
respective spindles, form a roll adapted to rotate truly, which would not be the case
if the roll were made of a solid cylinder of steel. The intermediate collars d, h may
also be hardened.
By forming rolls in disc like sections, any of the parts which may be injured can be
readily renewed with trifling expense.
The collars d and intermediate to the discs a and e in addition to holding the
said discs at a suitable distance apart and forming the corrugations in the metal as
above described, are preferably made of suitable diameter to press upon the sheet metal

page_text: between the apertures B and thus serve to flatten and smooth the same during the
cutting operation.
Having now particularly described and ascertained the nature of the said inven-
tion, 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 :-
First. In a machine for the manufacture of sheet metal lathing, the combination,
with a punching roll having a series of toothed discs of a die-roll comprising a
series of recessed discs and intermediate shearing collars, substantially as above
set forth.
Second. In a machine for the manufacture of sheet metal lathing, the combination,
with a punching roll having a series of toothed discs and intermediate collars, of a
die-roll comprising a series of recessed discs and intermediate shearing collars
bevelled at their edges adjacent to the recesses, substantially as and for the purposes
set forth.
Third The modification of my invention whereby I adapt the machine for
the manufacture of the corrugated metal lathing, substantially as herein before
described.
Fourth. In a machine for the manufacture of sheet metal lathing, the combination,
with a punching roll having a series of toothed discs with intermediate collars, and a
die-roll having a series of recessed discs with intermediate collars, of a series of
strippers applied to the die-roll, and a series of strippers applied to the punching roll,
substantially as and for the purpose, specified.
Fifth. The improved machine constructed substantially as described and shown in
the accompanying drawing and operating as and for the purpose, above specified.
Dated this 19th day of August 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.