AN IMPROVEMENT IN SLIVER OR CARD CAN RINGS
Year: 1883

page_text: LETTERS PATENT to John Rothwell and George M.Millan both of Farnworth
in the County of Lancaster for an Invention .of "AN IMPROVEMENT IN
SLIVER OR CARD CAN RINGS
"
PROVISIONAL SPECIFICATION left by the said John Rothwell and George
M*Millan at the Office of the Commissioners of Patents on the 21st February
.
•
1883.
JOHN ROTHWELL and GEORGE MOMILLAN both of Farnworth in the County of
Lancaster, "AN IMPROVEMENT IN SLIVER OR CARD CAN RINGS
"
Our Invention relates to the strengthening rings which are secured to the ends
of the cans which are employed to receive slivers of textile materials during the
operations of preparing such materials for spinning and particularly to the bottom
rings although our invention may also be applied in the making of the top rings.
The said cans are subjected to rough treatment which has the effect of loosening
and driving inwards the rings so that the cans are rendered less servicable and
effective. To remedy this defect we cause the iron or steel bars from which the
rings are to be made to be rolled into a section having two thicknesses so that a
ledge is formed which is about equal to or a little higher than the thickness of the
sheet tin or metal of the can. When these bars are formed into rings each ring is
inserted with its smaller diameter only entering the end of the can so that the
sheet metal comes up to the ledge which acts as an abutment which acts to keep
the ring in position and as a protection to the end of the sheet metal

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Rothwell and George McMillan in the Great Seal Patent
Office on the 20th August 1883.
JOHN ROTHWELL and GEORGE MOMILLAN both of Farnworth in the County of
Lancaster "AN IMPROVEMENT IN SLIVER OR CARD CAN RINGS
"
Our Invention relates to the strengthening rings which are secured to the lower
ends of the cans which are employed to receive slivers of textile materials during
the operations of preparing such materials for spinning. The said cans are
subjected to rough treatment which has the effect of loosening and driving
inward the rings so that the cans are less servicable and effective. To remedy
this defect we cause the iron or steel bars from which the rings are to be made to
be rolled into a section having two thicknesses so that a ledge is formed which is
about equal to or a little higher than the thickness of the sheet tin or metal of the
can. When these bars are formed into rings suitable for internal application each
ring is inserted with its smaller diameter only entering the end of the can, so that
the sheet metal comes up to the ledge which acts as an abutment which serves to
keep the ring in position and protects the end of the sheet metal. We do not
confine ourselves to the use of rolled metal in the formation of the rings.
In order that our 'Invention may be fully understood we have attached hereto
a. sheet of drawings representing in section our improved ring as applied to the
bottom of a can. In Fig I of the said drawings a represents-the-lowor-end of an
ordinary cylindrical can, 6 being our improved bottom ring. The said ring is
made from a bar of the section indicated in the drawing so that the ring has two
outside diameters the smaller diameter entering the can and the larger diameter
being the same as or a little in excess of the outer diameter of the can. Between
these two diameters is a ledge or shoulder c. When the ring is inserted in the can
body this ledge fits close against the end of the sheet metal shell. The ring is
provided with a beveled inward projection d which increases the support for the
can bottom e and furnishes means whereby the said bottom can be more firmly
soldered and secured. In some cases we make the ring of malleable cast iron
annealed in the ordinary manner. Fig 2 illustrates a modification wherein the
ring is formed with the ledge c inside instead of outside the ring being adapted to
be fixed on the outside of the shell of the can. For the formation of. the exterior
rings the bars are rolled without the projection d or the rings are cast without such
projection for an obvious reason.
Having now fully set forth and indicated the nature of our said Invention and
the manner in which we carry the same into practical effect we would have it to
be understood that we claim the improvements in the form of the can rings
whereby a ledge or shoulder is obtained substantially as and for the purpose set
forth and indicated hereinbefore and in and. by the accompanying drawings.
In witness whereof I the said John Rothwell.for myself and on behalf of the
said George McMillan have hereunto set my hand and seal this seventeenth
day of August in the year of our Lord one thousand eight hundred and eighty-
three.