Improvements in or relating to Machines for Cropping Textile Fabrics.
Year: 1893

page_text: Date of Application, 15th Sept., 1893
Complete Specification Left, 15th June, 1894-Accepted, 21st July, 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Machines for Cropping Textile
Fabrics.
I, FREDERICK JAMES HIBBERD, of 3 Rosslyn Villa, Clepington Road, Dundee,
in the County of Forfar, Scotland, Factory Manager, do hereby declare the nature
of this invention to be as follows:-
This invention relates to Improvements in or relating to Machines for Cropping
Textile Fabrics, its objects being to remove the caddis or fluff, which has been
cropped off the cloth, from the spiral knives, and pack it in the receiving boxes.
In cropping machines of the ordinary type where there is no special means for
removing the caddis from the spirals, it gets carried by the cloth over the spirals
again and again, and is recut, with the result that such spirals have to be frequently
sharpened; whereas other spirals, placed in more favorable positions keep sharp
for a much longer time.
In carrying out my invention I construct the box for receiving the caddis in a
manner specially suited for my purpose, that is to say, the portion of the box
immediately underneath the spiral is curved, its radius being generated from the
axis of the spiral and its surface parallel thereto, but at the same time clear of its
cutting surface. From another suitable axis within the box, its bottom is formed
of a part circle described about such axis, its surface being also parallel thereto,
and then merges into any other suitable curve. The intersection of the aforesaid
curves, namely the curve described about the spiral axis as a centre, and the other
described about the second axis, cut one another, thus forming a ridge running
parallel to the axis of the spiral. About the second axis a reciprocating presser
moves through the arc of a circle, its function being to intermittently remove the
caddis from the neighbourhood of the aforesaid spiral. The exremity of this
presser just clears the cutting edge of such spiral, as also the second curve of the
box, while it vibrates. The box may be arranged to cover the bolts which hold
the stationary knife in position. Inclined ridges may be made in the bottom of the
box to resist the tendency of the caddis to spring back, when the motion of the
presser is reversed and the pressure removed. The intermittent action of the presser
may be obtained in various ways, and from different parts of the machine, but I
prefer to take such motion from one of the delivery rolls.
Datel this 13th dov of Sentember 1893.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Machines for Cropping Textile
Fabrics.
I, FREDERICK JAMES HIBBERD, of 3 Rosslyn Villas, Clepington Road, Dundee,
in the County of Forfar, Scotland, Factory Manager, 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 :-
This invention relates to Improvements in or relating to Machines for Cropping

page_text: Textile Fabrics, its objects being to remove the caddis or fluff, which has been
cropped off the cloth, from the spiral knives, and pack it in the receiving boxes.
In cropping machines of the ordinary type where there is no special means for
removing the caddis from the spirals, it gets carried by the cloth over the spirals
again and again, and is recut, with the result that such spirals have to be frequently
sharpened; whereas other spirals, placed in more favorable positions keep sharp
for a much longer time.
The description of my improvements is assisted by two sheets of explanatory
drawings hereunto appended and hereinafter referred to.
Figure 1. is a part sectional elevation looking in the direction of the arrow A.
(Figure 2.) and Figure 2. is a part plan of a cropping machine fitted with my
improvements.
Figures 3. and 4. are enlarged sectional and side elevations respectively of the
caddis box showing the action.
In these drawings the same reference letters and numerals are used to mark the
same or like parts wherever they are repeated.
In carrying out my invention I construct the box 10. for receiving the caddis in
a manner specially suited for my purpose, that is to say, the portion 11. of the box
immediately underneath the spiral 12. is curved, its radius being generated from
the axis of the spiral and its surface parallel thereto, but at the same time clear of
the cutting surface. From another suitable axis 13. within the box, its bottom 14.
is formed of a part circle described about such axis, its surface being also parallel
thereto, and then merges into any other suitable curve 15. The intersection of
the aforesaid curves, namely the curve described about the spiral axis, as a centre,
and the other described about the second axis, cut one another, thus forming a
ridge 16. running parallel to the axis of the spiral. About the second axis 13. a
reciprocating presser 17. moves through the arc of a circle, its function being to
intermittently remove the caddis from the neighbourhood of the aforesaid spiral 12.
The extremity of this presser just clears the cutting edge of such spiral, as also
the second curve of the box, while it vibrates. The presser is caused to vibrate by
a cam 18, upon the roller shaft 19, actuating the lever 20, its motion being then
communicated to the pulley 21. on the presser shaft by means of the chain 22.
The box is arranged to cover the bolts which hold the stationary knife 23. in
position.
The intermittent action of the presser may be obtained in various ways, and from
different parts of the machine, but I prefer to take such motion from one of the
delivery rolls as previously explained. To allow of the presser arbor 17. being
removed the sliding piece 27. is provided.
The mechanism operates in the following manner :-The caddis, taken off the
cloth which is being operated upon, passes into the space at 11. and from thence is
thrown by the action of the spiral knife 12. towards the semi-circular cover 24,
after which it falls upon the presser 17. and the portion of the box 14. such
deposit being then intermittently pushed forward by the presser 17. into the space
at 15.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In cropping machines
(1.) The combination of parts for removing the caddis from spirals, substantially
as hereinbefore described with reference to the accompanying drawings.
(2.) The combination of the presser 17. with the chain 22, guide pulleys 26,
spiral spring 25, lever 20, and cam 18, substantially as described and for the
purposes set forth.
(3.) The combination of the spiral knife 12, with the box 10, so shaped as to
direct the caddis away from such spiral knife, substantially as described.

page_text: (4.) The combination of the spiral knife 12, with the semi-circular cover 24,
substantially as described.
Dated this 14th day of June 1894.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.