Improvements in the Coverings of Drawing Rollers and in Endless Bands used in the Preparation and Spinning of Textile Fibres.
Year: 1897

page_text: Date of Application 16th July, 1897-Accepted, 6th Nov., 1897
Improvements in the Coverings of Drawing Rollers and in Endless
Bands used in the Preparation and Spinning of Textile Fibres.
I GUSTAV HEINRICH SACHSENRÖDER of Barmen-Unterbarmen, in the Empire of
Germany, Parchment 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:-
As is well known, the drawing rollers used in the preparation and spinning of
cotton to draw out the fibres or yarns are covered usually with leather. These
leather sheaths must be of equal thickness throughout as any want of truth in the
rollers causes defects in the yarn.
The leather composing the sheath has therefore to be carefully equalised in
thickness and afterwards trued on the roller. It is also of great importance that
the slantingly cut and cemented lap joint of the leather sheaths should be perfectly
equal with the rest of the circumference so as to present no inequality as this
also would cause defects in the work.
The cost of manufacturing such leather coverings and the initial cost of the
leather have caused numerous attempts to be made to find a substitute for the
purpose of cheapening the production of such covered drawing rollers. Among
other materials paper and vellum or vegetable parchment have been tried but
owing to the defective methods employed to cement or secure the coverings to each
other and to the rollers these attempts have proved unsuccessful.
The present invention has for its object to overcome the difficulties in the
employment of such vellum or parchment paper as a covering for drawing rollers.
In carrying the invention into effect I take thin parchment paper and soak it
in a solution capable of dissolving cellulose the composition of such cellulose
solvents being well known. For instance a suitable solvent for the purposes of
my invention would consist of sulphuric acid in a concentrated form such as is
well known in commerce and ordinarily used in the manufacture of parchment
paper. I then apply the soaked parchment paper in successive layers till I form
a tube of sufficient thickness. The cement which binds together these successive
layers consists of the aforesaid liquid cellulose solvent, which causes the various
layers or thicknesses of parchment paper to adhere firmly together and form what
is practically one thickness of parchment material uniform in texture and weight.
In this manner I form a covering or sheath with no inequalities and of a uniform
thickness all round. To draw this sheath upon the roller I soften it with glycerine
water or other suitable agent, and then draw it upon the roller where it dries and
adheres.
Apart from the greatly reduced cost of my improved drawing roller coverings
as compared with leather coverings and the fact that they will last for at least an
equal length of time, I have found that fewer defects in the work are caused by my
improved roller coverings than is the case with leather covered rollers.
It is not essential that finished and completed paper parchment should be used
in the manufacture of my improved drawing roller coverings, as the material may

page_text: be applied in layers in the course of original manufacture, the cellulose solvent in
the material serving to bind together and amalgamate the layers in building up
the sheath.
The aforesaid sheath or covering material may be used in wool spinning in the
production of the endless bands sometimes used to draw out the yarns and which
might be considered as drawing rollers of a larger diameter.
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 improved manufacture of sheathings or coverings for drawing rollers from
parchment paper substantially as set forth.
Dated this 15th day of July 1897.
For the Applicant,
E. K. DUTTON & Co.,
5 John Dalton Street, Manchester, Chartered Patent Agents.