"Mercerised" Yarns, Process for Giving an Increased Finish to Threads, Woven Fabrics, and the like Made from Vegetable Fibres.
Year: 1898

page_text: COMPLETE SPECIFICATION.
"Mercerised" Yarns,
Process for Giving an Increased Finish to
Threads, Woven Fabrics, and the like Made from Vegetable
Fibres.
I, HERMANN GASSNER, of Bludenz, Vorarlberg, in thé Austro-Hungarian
Empire, 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:-
As is commonly known the glossing or finishing of yarns, threads and woven
fabrics made from vegetable fibres is usually performed in such a manner that
the said materials are treated in alkaline and as the case may be, in acid baths
("mercerisation") and are thereupon washed out.
In these cases the treated yarns, threads or fabrics are maintained in a stretched
condition either during the mercerisation," or during the washing operations
or during both said operations; or the gloss is imparted to the yarns or threads
by winding up upon reels the yarns or threads coming from the mercerising
liquid without stretching the same; or by mercerising and subsequently washing
out the yarns or threads already wound up in an unstretched condition upon reels
or centrifugal drums
The inventor has found that a considerably increased and finer gloss or finish
can be imparted to the yarns, threads or fabrics which have been submitted to a
mercerising treatment after any method, by stretching the said materials when
in a wet condition and by maintaining them stretched until they are completely
dry.
This particular feature essentially distinguishes the process forming the object
of the present invention from any known and commonly used mercerising pro-
cesses according to which the yarns threads or fabrics are suspended for drying
in an unstretched condition or taken out from the stretching device and suspended
for drying, or finally the yarns wound up without tension on reels are left upon
the said reels until they are completely dried.
For obtaining an increased gloss or finish, yarns, threads or fabrics previously
mercerised after any method can be essentially improved in their appearance by
wetting again the mercerised goods after they have already been dried, stretching
the wet goods and again drying the same in a stretched condition, or by sub-
mitting the goods already mercerised and dried to a repeated mercerisation where-
upon they are washed, stretched and dried again in a stretched condition.
A higher gloss or finish than that heretofore obtainable can also be produced
in such a manner that the mercerised and washed out yarns, threads or fabrics,
instead of being dried in a stretched state in their raw condition are previously
boiled and as the case may be, bleached, dyed, and printed, and after all these
intermediate operations, or after either of them (if only one single operation
a stretched
should be performed) are submitted to the drying operation in
condition.

page_text: In all these last mentioned cases the goods can also be maintained in a stretched
condition during the said operations of boiling, bleaching, dyeing or printing.
In any case the gloss or finish of the mercerised vegetable materials will
always be considerably increased.
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:-
1,-Process for giving to mercerised yarns threads and woven fabrics an
increased gloss or finish consisting in that these materials after the washing out
are stretched out wet and dried in the stretched condition.
2,A modification of the process specified in Claim 1, consisting in that the
already mercerised and dried yarns, threads and woven fabrics are moistened or
wetted stretched out and dried in that condition.
3, A modification of the process described under Claim 1, consisting in that
the previously mercerised yarns, threads and woven fabrics are again mercerised
and after the washing out are stretched out and dried in that condition.
4, A modification of the process specified in Claim 1 consisting in the fact
that the previously mercerised yarns threads or fabrics, instead of being dried
untreated in the stretched state, are first boiled bleached, dyed and printed, and
after all these operations, or after the one of the operations which is alone
effected, are dried in the stretched state; in all these cases the goods being also
kept stretched during the boiling, bleaching, dyeing or printing, if desired.
Dated this 30th day of March 1898
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.