IMPROVEMENTS IN MACHINES FOR WHITENING AND BUFFING LEATHER
Year: 1876

page_text: LETTERS PATENT to Joseph Emerson Fisk of Salem, in the County of Essex,
and State of Massachusetts, in the United States of America, for the
Invention of "IMPROVEMENTS IN MACHINES FOR WHITENING AND BUFFING
LEATHER."
Scaled the 23rd September 1876, and dated the 5th August 1876.]
COMPLETE SPECIFICATION filed by the said Joseph Emerson Fisk at the
Office of the Commissioners of Patents, on the 5th August 1876.
JOSEPH EMERSON FISK, of Salem, in the County of Essex, and State of Massa-
chusetts, in the United States of America. "IMPROVEMENTS IN MACHINES FOR
WHITENING AND BUFFING LEATHER."
My Invention relates to an improved machine for whitening and buffing leather,
in which a rotary cutting cylinder is used, and refers principally to the table or bed
of the machine, which is used under the cutting cylinder, and on which the leather
is placed to be operated upon. This bed is caused to vibrate or reciprocate by
suitably applied mechanism so as to bring the leather under the action of the
cutter at each movement of the bed, the result being to facilitate the handling of
the leather, to produce a more uniform surface in whitening and avoid the use of a
reciprocating cutting cylinder.
The Drawing represents in Figure 1 a vertical section, and in Figure 2 a front
elevation of a machine containing my improvements. Similar letters of reference
indicate like parts in both Figures.
A is the base of the machine; B is a vertical post, the top of which is curved
over the bed, and in which the cutting cylinder C is journaled in suitable bearings.
To the post B is also attached the bracket N, on which the pulleys for transmitting
motion to the bed are placed; D, D, are two guide standards which are grooved
on the inside to receive the sliding frame E, to which the vibrating bed F is
attached at or near the bottom of the sliding frame E by suitable connections,
and arranged to vibrate in the sliding frame E by the connecting bar or pitman G,
which is attached both to the upright part of the bed and to the crank wheel H.
The crank wheel H is placed on the same shaft with the friction wheel I, and they
are brought in contact with each other or disconnected by the wedge clutch J,
attached to the sliding frame E. The friction wheel I is belted to a pulley K on
the cutting cylinder shaft. The foot lever L is arranged to clevate the bed F, so
[Price 4d1

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as to bring the leather in contact with the cutting cylinder C. At the same time
this is done the friction wheel I is forced into contact with the crank wheel H by the
clutch J, so that the vibratory motion of the bed commences with its elevation, and
ceases when it is lowered. A portion of the surface of the bed F may be shaped to
correspond with the periphery of a circle, of which the point of attachment to
the lower end of the sliding frame is the center, and the length of the circle
formed on the surface of the bed in this way may indicate the length of the stroke,
or the duration of the action of the cylinder upon the leather.
The cutting cylinder may be a series of spirally formed teeth cut upon a steel
cylinder, as shown in the Drawings, or a series of knives or cutters attached to a
cylinder, as in cloth shearing or other machines of like character. It is operated
through the pulley M from any suitable motor and should be run at a high rate
of speed. A suitable stop may be arranged on the sliding fraine E to adjust
the height to which the bed is raised to operate properly on the leather. The
bed plate may in some cases be arranged so as to receive a reciprocating instead
of a vibratory motion. The leather is placed on the bed plate F. The bed is
clevated by the lever L. The vibrating movement of the bed commences simul-
taneously with the raising of the bed. The leather is held by the operator by
folding it down over the front edge of the bed. The motion of the bed carrying
the leather with it under and in contact with the cylinder causes the cylinder to
cut or whiten it, and the vibrating movement gives the operator time at each
stroke to adjust and manipulate the leather under the cutter. The speed of the
cylinder should be very great, and the vibration of the bed should be as fast as will
be convenient for the operator to properly handle the leather.
CLAIMS.
First. In a machine for whitening and buffing leather, the combination and
arrangement of the rotary cutter and the vibrating bed F and sliding frame E.
Second. In a machine for whitening and buffing leather, the combination of the
lever L with the clutch J and friction wheel I for raising and lowering the bed
simultaneously with its vibrating movement.
In witness whercof, I, the said Joseph Emerson Fisk, have hereunto set my hand
and seal, this Twenty-fifth day of May, 1876.