or other Spotted Woven Fabrics.
Year: 1884

page_text: or other Spotted Woven Fabrics..
I JOHN MARSHALL, of 406 Duke Street, Glasgow, in the county of Lanark,
Foreman, do hereby declare the nature of my said invention for "IMPROVEMENTS
IN MACHINES FOR RIPPING AND CLIPPING LAPPETS OR OTHER SPOTTED WOVEN
FABRICS," to be as follows:-
This invention relates to mechanism to be used for ripping the loose surface
warp threads of lappets and other spotted woven fabrics.
In weaving such fabrics a number of the warp threads extending between the
spots are usually "floated" or left unattached to the body of the fabric, and such
loose warp threads are ordinarily cut by hand. The object of this invention is to
effect the cutting operation in a more expeditious manner by means of knives
operated by machinery. The machinery or apparatus employed in carying out
this invention consists of a framing carrying a transverse reciprocating knife bar or
bars under which the uncut fabric is passed over tension bars and over a straining
or "pace" beam or roller, then over or under another roller which may be raised
or lowered to suit the working and also to allow the seam to pass where goods are
joined.
The fabric then passes over or under the more horizontal reciprocating bars, to
which are attached the knives which cut or rip the loose threads, then over or
under another roller, then through delivering rollers. The fabric may then be
either wound upon a roller or delivered on the floor. The reciprocation of the
knife bar or bars may be effected by cranks or eccentrics and connecting rods, or
by other well-known mechanical devices. The ripping apparatus above described
may be placed in front of or attached to an ordinary clipping machine, and by
working in unison therewith may form a combined ripping and clipping machine.
The knives are adjustably secured to the sides of the reciprocating bar or bara
(preferably two) by bolts or similar devices, and they may be either curved,
angular, or straight and diverge from a short distance past the centre on either or
both sides of the bar or bars, the cutting edge facing outwards. This inclination
of the knives from the centre, obviates the possibility of the edge or selvage of the
fabric being damaged.
The speed of the cloth should be varied according to the divide or pitch of the
spot or harness pattern.

page_text: Improvements in Machines for Ripping and Cüpping Lappets
or other Spotted Woven Fabrics.
I, JOHN MARSHALL of 406 Duke Street, Glasgow, in the County of Lanark,
Dyer and cloth finisher do hereby declare the nature of my invention for
IMPROVEMENTS IN MACHINES FOR RIPPING AND CLIPPING LAPPETS OR OTHER
SPOTTED WOVEN FABRICS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
•
This invention relates to mechanism, to be used for ripping the loose surface
threads of Lappets and other spotted woven fabrics.
In weaving such fabrics a number of the warp or weft threads, are usually
floated or left unattached to the body of the fabric, and such loose threads are
ordinarily cut by hand. The object of this invention is to effect the cutting
operation in a more expeditious manner by means of knives operated by machinery.
The machinery or apparatus employed in carrying, out this invention consists of
a framing, carrying a transverse reciprocating knife bar or bars, under which, the
uncut fabric is passed over tension bars and over a straining or "pace" beam or
roller, then over or under another roller, which may be raised or lowered to suit
the working, and also to allow the seam to pass where goods are joined.
The fabric then passes over or under the horizontal reciprocating bar or bars, to
which are attached the knives which cut or rip the loose threads, then over or
under another roller and then through delivering rollers.
The fabric may then be either wound upon a roller or delivered on the floor.
The reciprocating of the knife bar or bars, may be effected by cranks or
eccentrics and connecting rods, or by other well known mechanical devices.
The ripping apparatus above described may be placed in front of, or attached to,
an ordinary clipping machine, and by working in unison therewith may form
a combined ripping and clipping machine.
The knives are adjustably secured to the sides of the reciprocating bar or bars,
(preferably two) by bolts or similar devices, and they may be either curved,
angular, or straight, and diverge from a short distance past the centre, on either or
both sides of the bar, or bars, the cutting edge facing outwards.
This inclination of the knives from the centre, obviates the possibility of the
edge or selvage of the fabric being damaged.
The speed of the cloth should be varied according to the divide or pitch of the
spot or Harness pattern.
On the sheet of drawings hereunto appended, the improved machine for ripping
and clipping lappets or other spotted woven fabrics constructed in accordance with
my said invention, is illustrated in elevation at the gearing end at Figure 1.
Figure 2 is a front elevation of the machine. Figure 3 is an elevation of the
driving end, whilst Figures 4. 5. 6. 7. & 8 are respectively a detailed section &
plan of portions of the apparatus, these latter figures being drawn to a larger
scale, than the others for the purpose of more clearly illustrating certain parts of
the mechanism,

page_text: As shown by the drawings the apparatus consists of two end frames A, which
are beld or bound together by stays M. The driving shaft N of the machine is
carried in bushes or bearings, supported on the framing A and on the said shaft,
fast and loose pulleys are placed and driven by a belt or band, suitably connected
with a motion shaft.
All the moving parts of the machine are actuated from the driving pulley and
shaft N, by means of the gearing shown at Figures 1 and 2. of the drawings.
The fabric, the loose threads of which are to be ripped is passed into the ripping
apparatus, over and under the entering rails C, which are situate at front of the
machine. From the rails C, the fabric is conducted round the straining or "pace
arrangement D, which is arranged to give the requisite degree of tension by
turning the wheel in the required direction.
From the pacing arrangement D, the fabric is led over rollers E and H, which
are capable of being either lowered, raised, or brought together as close as is
desirable, according to the nature of the cloth to be operated upon. The fabric in
being passed over rollers E and H, is brought directly under the reciprocating
knife bar or bars, on which are fixed and arranged, by means of bolts or other
devices the knives G. The rollers E and H, to make the machine effective have to
be raised to a point slightly higher, than the points of the knives G and when the
machine is in motion, the reciprocation of the bar or bars, causes the points of the
knives G to enter under the loose or floating yarn, with the result of severing
the yarn or threads desired to be cut. After being operated upon by the ripping
mechanism, as herein-before described, the fabric may be batched or rolled on the
roller K, or it may be passed between the rollers K and I and delivered on the
floor.
The Lever F. connected with the roller E. is for the purpose of lowering said
roller, when a seam or joining of ends is being passed through.
The reciprocating bar or bars B, by which the ripping action is performed, as
herein-before set forth, is arranged to work in slot bearings, attached to each of the
frames A. These slot bearings are provided with covers, secured by bolts or pins,
which can be easily removed, so as to allow of the knife bar or bars being lifted
out, for sharpening or other purposes.
The knives G, provided in conjunction with the bar or bars B, are each held in
their proper positions on the bar or bars B. by two bolts and nuts L or other
arrangement.
Reciprocating motion is communicated from the driving shaft N. to the bar or
bars B, by means of disc and connecting links or other equivalent arrangement.
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 reciprocating knife bar or bars, with the knives placed at right angles to
the cloth, and the particular arrangement, whereby they diverge from a short
distance past the centre, on either or both sides of the bar or bars, the cutting edge
facing outwards.