and other Woven or Felted Fabrics.
Year: 1885

page_text: and other Woven or Felted Fabrics.
We GEORGE HENRY NUSSEY of Boar Lane, Woollen Manufacturer, and WILLIAM
BRADSHAW LEACHMAN of Tonbridge Street, Mechanical Engineer, both of Leeds
in the County of York do hereby declare the nature of said invention for
"IMPROVEMENTS IN MACHINERY EMPLOYED IN FINISHING WOOLLEN AND OTHER
WOVEN OR FELTED FABRICS to be as follows:-
33
Our invention has reference to what is known as the "Lewis" machine or
"Perpectual" used for shearing the nap off woollen or other woven or felted
fabrics.
effected by means of rotatory
In that machine the operation of shearing
helical cutters acting in combination with a straight knife or blade and bed.
We find in practice when using the machine as hitherto constructed that the
material is frequently cut through into holes consequent upon the unevenness of
the material and rigidity of the bed on which it rests during the cutting operation.
Now in order to prevent this dainage we construct the bed of pliable india rubber
tubing (by preference vulcanized) thus forming an elastic bed which gives way to
any unevenness during the shearing operation and prevents damage to the material.
As some classes of material have more extensive irregularities of surface than
others it is necessary that the hardness or elasticity of the bed should be increased
or reduced at pleasure. This we arrange for by filling the tube forming the bed
with water or air, more or less under pressure as may be required.
The elastic tube may be covered with a thin layer of paper or other fabric.

page_text: and other Woven or Felted Fabrics.
We GEORGE HENRY NUSSEY of Boar Lane Woollen Manufacturer, and WILLIAM
BRADSHAW LEACHMAN of Tonbridge Street, Mechanical Engineer, both of Leeds
in the County of York, 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 :—
Our invention has reference to what is known as the "Lewis" machine or
"Perpectual" used for shearing the nap off woollen or other woven or felted
fabrics.
In that machine the operation of shearing is effected by means of rotatory
helical cutters, acting in combination with a straight knife or blade and bed.
We find in practice when using the machine as hitherto constructed that the
material is frequently cut through into holes consequent upon the unevenness of
the material and rigidity of the bed on which it rests during the cutting operation.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a transverse section and Fig. 2 a side elevation.
Now in order to prevent the damage herein before mentioned, we construct the
bed a of pliable material, such as waterproof canvas or other sheeting.
This is mounted on the adjustable sliding piece b.
As some classes of material have more extensive irregularities of surface than
others, it is necessary that the elasticity of the bed should be reduced or increased
at pleasure. This we arrange for by providing a gutter c the whole length of the
sliding piece b which is covered at d by the waterproof material. This gutter
or groove c we fill with water or air, more or less under pressure as may be
required.
The waterproof material forming the bed a is secured to the sliding piece b so as
to be perfectly air or watertight.
The sliding piece b is supported on a beam e mounted between suitable frame-
work f, such sliding piece b being capable of adjustment on the beam e to any
required position to suit the material operated upon. Water or air is supplied to
the gutter or groove c through opening g and passage h in the sliding piece b.
Suitable pipe or tube i for conveying the air or water thereto may be attached to
the end of the sliding piece b.
The waterproof material forming the bed a may be covered with a thin layer of
paper or other fabric.
The ordinary rotary helical cutters are shewn at j; these cutters are of the 3
usual description and are operated in the ordinary manner.
The piece operated upon passes over the elastic bed as shewn at k. The cutters j
when revolving are brought down and shear the nap off the fabric as it is moved
over the surface of the flexible bed and against the knife l.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
1st The arrangement, construction and application of flexible bed over which
the fabric is caused to pass for the purpose of shearing the nap off by means of the
rotary helical cutters j, substantially as herein set forth.
2nd The arrangement of elastic bed in combination with helical cutters ; and
knife l, substantially as and for the purposes herein setforth.
J. W. HARDING
Agent.