IMPROVEMENTS IN AND ADDITIONS TO TINPLATE WORKERS' ROLLS OR TINMAN'S ROLLS
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by Joseph Caddick at the Office of the
Commissioners of Patents on the 20th March 1879.
JOSEPH CADDICK, of Birmingham, in the County of Warwick, Tool Maker.
"IMPROVEMENTS IN AND ADDITIONS TO TINPLATE WORKERS' ROLLS OR TINMAN'S
ROLLS."
Tinplate workers' rolls or tinman's rolls as ordinarily constructed consist of a set
of three rolls for bending up strips or pieces of tinplate into a tubular form, from
which the bodies of money boxes, paste boxes, blacking boxes, and other boxes,
saucepans, camp kettles, watering cans, and other like articles are made; and my
Invention consists in part in constructing the said rolls in the manner herein after
described, whereby the said rolls are made to bend or turn up the strips or pieces
into a cylindrical form, and to "edge" the said strips or pieces at one process, that
is, to bend the extreme edge or the opposite edges of the strip at the required angle.
The said rolls are also constructed to wire and edge the strip, and to perform other
operations required in the manufacture of the articles before enumerated, and other
like articles, as herein after explained.
T
For bending up the strip or piece into a cylindrical form, and for "edging" it
at the same time, I make in the cylindrical surface of one roll a series of collars,
and in the other roll a series of depressions of a corresponding figure. The space
between two adjacent collars and their depressions constitutes a groove having a
figure the counterpart of that to be given to the strip, that is, the greater part of
the groove is parallel to the acting faces of the rolls, but the ends of the groove are
situated at a right angle to or inclined at the required angle to the principal part
of the groove, and by the action of the said end parts of the groove the extreme
edges of the strip are bent up or "edged" at the same time that the strip is bent
or turned up into a cylindrical figure. Grooves of different lengths are constructed
by preference in the same set of rolls for operating upon strips of different lengths,
and each of the rolls may either be made in one piece, or built up of several ring-
like or tubular pieces strung upon an axis, and bound or locked together in any
convenient manner.
For "wiring" one edge of the strip and "edging" the opposite edge, the grooves
of the rolls are made of the necessary shape to effect these operations.

page_text: I construct the rolls for forming a "bead" on the strip and for "edging" both
edges of the strip at the same time in the following way :-
I construct one of the rolls with a collar which works in a corresponding depres-
sion in the other roll for edging one side of the strip, and at the required distance
from the said edging collar and groove I form the beading collar and groove. At
the required distance from the first named edging collar and groove I form a second
edging collar and groove for edging the opposite edge of the strip. By passing the
strip of tin plate through the rolls it is "edged" at both edges, and a bead formed
near one of the edges, and bent up into a cylindrical figure before passing from the
rolls. Each of these rolls may either be made in one piece, or built up of separate
parts connected to an axis, the acting parts of the rolls being adjusted at the
required distance apart by packing rings, or in any other convenient manner.
For folding and pressing together the engaged edges of the strips for joining
them together, which process is commonly called "grooving," I provide the rolls
with grooves of the required shape for folding and pressing together the interlocked
edges, and also with guide collars, between which the strips are guided as they are
operated upon by the rolls. Two pressing bars, bearing on opposite sides of the
interlocked parts, may be used for holding them in their places during the closing
operation, and these pressing bars may carry small rollers for indenting the closed
parts and improving the joint.
For the simultaneous " wiring" of the opposite edges of strips to be afterwards
made into tea kettle handles, watering can handles, and other like articles, I make
a groove in the top roll of a size proper to receive the body of the strip and its
folded edges containing the wires, and I use a plain bottom roll of a size proper to
enter the groove in the other roll, and press the folded edges of the strip into contact
. with the wires as the strip is passed between the two rolls. A pair of back rolls
may be used to finally close or to perfect the closing of the folded edges upon the
wires after the strip passes from the first or front pair. Holders or pressers may
be used for holding the wires in their places during the closing operation. One
edge only of the strip may be wired by modifying the shape of the groove in the
rolls. The rolls may be used for closing the edge or edges of the strip without
wire, so as to strengthen the said edges, and give them the same appearance as
wired edges. When an unwired edge of this kind is made on one edge of the strip
the opposite edge may be "edged "or bent at the proper angle by the same
process.
'
For the purpose of guiding the strips to be rolled, when required, I support at
the front of the rolls two vertical adjustable guides, between which the strip or plate
to be fed between the rolls passes.
These guides are carried by horizontal slotted plates attached to the framing of
the rolls, and in these slotted plates the guides may be adjusted to the width of the
plates or strips to be fed, the said guides being fixed in their adjusted positions by
screw pins or other fastenings.