Improvements in the Manufacture of Jute Yarns.
Year: 1892

page_text: Date of Application, 24th Sept., 1892
Complete Specification Left, 23rd June, 1893-Accepted. 29th July. 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Jute Yarns.
I, DAVID DONALD, of 10, Victoria Chambers, Dundee, in the County of Forfar,
North Britain, Jute Manufacturer, do hereby declare the nature of this invention to
be as follows, that is to say :-
"
My said invention has for its object by an improved combination of processes or
operations, to manufacture jute yarns so as to present a certain soft or "lofty
condition heretofore unknown in such yarns, and which renders them better adapted
than heretofore for various purposes.
My invention is applicable to yarns composed of two or more strands twisted
together; and in carrying out my invention I take any jute yarn to which a
considerable degree of twist has been imparted in doubling the strands together,
and I have such yarn dyed and treated by the process known to jute dyers as
"woollenizing," by which the fibres are somewhat crisped and have a wool-like
condition imparted to them. Or the jute yarn may be "woollenized" without being
dyed. I finally put the yarn through a process of reverse twisting or partial
untwisting, whereby the yarn is deprived of its hard character and is rendered soft
and still more wool-like.
Dated this Twenty-third day of September 1892.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Jute Yarns.
I, DAVID DONALD, of 10, Victoria Chambers, Dundee, in the County of Forfar,
North Britain, Jute Manufacturer, 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, that is to say :-
"
My said invention has for its object, by an improved combination of processes or
operations, to manufacture jute yarns so as to present a certain soft or "lofty
condition heretofore unknown in such yarns, and which renders them better adapted
than heretofore for various purposes.
My invention is applicable to yarns of two or more strands twisted together;
and in carrying out my invention, according to one modification 1 take any jute
yarn to which a considerable degree of twist has been imparted in doubling the
strands together, and I have such yarn dyed after having been treated by the
process known to jute dyers as "woollenizing," by which the fibres are somewhat
crisped, and have a wool-like condition imparted to them, I finally put the yarn
through a process of partial untwisting whereby the yarn is deprived of its hard
character and is rendered soft and still more wool-like. The relative degrees of
primary extra twisting and subsequent untwisting may be varied in different cases,
but I may state, by way of example, that the untwisting may extend to a half of
the primary twisting, with good results.
According to other modifications the jute yarn may be wollenized without being
dred, between the primary twisting and subsequent partial untwisting operations.
I prefer to have the wollenizing process applied, but instead of that process or in
addition thereto the yarn may be subjected to bleaching, scouring, boiling, milling

page_text: (that is fulling) or other treatment involving the wetting of the yarn between the
primary twisting and subsequent partial untwisting operations.
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 :-
1. In the manufacture of jute yarns, the combination of processes in which the
yarn is first twisted to an extra degree, is next "woollenized" and is finally partially
untwisted substantially as and for the purposes hereinbefore described.
2. In the manufacture of jute yarns, the combination of processes in which the
yarn is first twisted to an extra degree, is next subjected to any wetting treatment,
and is finally partially untwisted substantially as and for the purposes hereinbefore
described.
Dated this Twenty-first day of June 1893.
EDMUND HUNT,
Applicant's Agent.