IMPROVEMENTS IN MACHINERY FOR BOARDING, SOFTENING AND GRAINING LEATHER
Year: 1885

page_text: COMPLETE SPECIFICATION.
I WILLIAM PAUL of Kirkstall Road Leeds in the County of York, Tanner and
Currier, do hereby declare the nature of said invention for "IMPROVEMENTS IN
MACHINERY FOR BOARDING, SOFTENING AND GRAINING LEATHER" and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :—
My improvements have reference to machines for boarding, softening and
graining leather for which Letters Patent were granted to William John Coogan
dated March 12th 1873 No 899.
In my improvements I construct the cylinders of a much larger size than those
hitherto employed in machinery for boarding, softening, and graining leather.
I also cover the cylinders with kamptulicon or cork floor cloth, instead of
natural cork which has hitherto been employed. By the above increase in the
Bize of the cylinders from about 7 inches to about feet, the boarding, softening
and graining is much better and more quickly effected, and by using kamptulicon
or cork floor cloth instead of natural cork blocks, a much better surface on the
cylinders is maintained, this assisting much in improving the quality of the work.
The cylinders are mounted on parallel shafts, one above the other, the upper
cylinder shaft is capable of adjustment in its bearings so that the distances apart
of the cylinders may be regulated to suit the class or quality of the material to be
operated upon.
The leather to be operated upon is passed onto and over the edge of a metal
plate which runs the whole length of the cylinders and mounted on a swing table.
By means of a treadle movement the table carrying the metal plate with the
leather thereon presses it in a doubled state between the two cylinders. The
cylinders being caused to rotate in one and the same direction cause the two
layers of leather to be drawn in opposite directions, thus constantly doubling or
folding it in a new place as it is fed forward, at the same time softening the
leather, also boarding and graining it.
And in order that my invention may be more completely understood reference is
given to the accompanying drawings and to the letters and marks thereon.

page_text: DESCRIPTION OF DRAWINGS.
Fig 1 is a front elevation. Fig 2 an end elevation and Fig 3 a plan shewing my
improvements.
a is the framework b and c are respectively the upper and lower cylinders which
may be constructed of wood or metal and which are covered with kamptulicon or
cork floor cloth. The shaft d on which the lower cylinder c is carried has its
bearings e on the framework a, the upper cylinder shaft f is carried in the adjust-
able sliding bearings g and the adjustment is effected by means of the adjusting
screws h and i.
The swing table j is carried on arms k, such arms being carried on ordinary
studs attached to the framework a On the table j is provided the continuous
metal plate m over which the material is passed in order to be operated upon by
the cylinders b and c. The plate m is brought up to the cylinders by the
attendant through the medium of the treadle which is coupled to the upper part of
the arms by means of ordinary chains.
In order to prevent the material being pressed too far between the cylinders
I employ a stop piece n on the sides of the framework a and the set screw n¹ on
the arms k carrying the table j.
Motion is imparted to the lower cylinder c through the driving shaft o, spur
wheel g, thence through an intermediate spur pinion r, to the spur wheel 8 and
to the upper cylinder shaft f. The driving pullies t is employed for transmitting
motion to the driving shaft.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
The employment of large cylinders b and c covered with kamptulicon or cork
floor cloth in combination with the various parts forming the machine for boarding,
softening and graining leather substantially as herein set forth.
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