Improved Manufacture of Knitted Driving or Transmission Bands or Belts.
Year: 1898

page_text: Date of Application, 22nd Jan., 1898
Complete Specification Left, 24th Aug., 1898-Accepted, 21st Jan.,
1899
PROVISIONAL SPECIFICATION.
Improved Manufacture of Knitted Driving or Transmission
Bands or Belts.
I, MAX KOCH, of 53, Niederroslaer Strasse, Apolda, in the Empire of Germany,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
The object of the present invention is a knitted belt or band suitable for driving
bands. The knitting is done on a double-rib loom or other similar machine, and
the band may be knitted in one two or several layers consisting of outer and
foundation or inner layers.
Instead of being knitted on two needle-circles, the band may be also knitted on
one, and the number of threads may be altered as desired, so that for instance,
instead of three thread guides as in the arrangement to be described more, or even
only two or one may be used. In the interior, the weft may be replaced by threads
coming from the two other machines.
This band unlike other knitted belts is produced as follows:-
The warp-threads are bound together, alternately on the right and left hand
sides on two circles of needles the cross and longitudinal wefts being tightened
during this operation. The band has a double series of loops and is the same on
both sides.
The needle circles rise alternately and the threads are placed round the needles.
In the arrangement for producing a band by means of three co-operating
machines I employ a front circle of needles a back circle of needles
a front weft machine and back weft machine and a longitudinal
weft or longitudinal weft machine. The front and back cross weft passes
through the thread guides closing at each course transversely of the width of the
band and visible only at the side of the finished band.
When the back weft machine places the thread, on the right round the needles
the front machine places the threads round the needles on the left and vice versa.
The threads to the right and left on the back and front machine are mutually
and alternately connected.
.
A knitted band or belt has the advantage over woven belts of being more flexible
and extremely durable at the edges and very strong.
The band knitted according to the present invention has also the advantage
over woven bands or belts or those knitted in any other way, of having uniformly
strong edges while it is well known how extremely difficult it is to produce uniform
woven edges. As in the bands according to the present invention the outer layer
is connected with the inner layers by loops, sewing together of the different layers
of the band is not necessary and the band is perfectly flat over the whole surface.
Woven bands or those knitted in the ways hitherto known must on the contrary
be at first sewn through in order to cause the tube to assume the shape of a band
the consequence being that the sewing stitches lie on the surface and so become
worn out much quicker than the band or belt itself.
As the method of knitting described is much easier than in weaving a tubular
ID 037

page_text: Woven bands or those knitted in the old manner must on the contrary be sewn
through in order to give the tube produced the shape of a band, or to cause it
to be compressed whereby there are on the surface of the band stitches which
wear out much sooner than the band itself. As the described knitting is much
easier than weaving a tube, a band knitted according to this invention is much
cheaper than a woven one or one knitted in any other manner.
A band knitted according to this invention may be impregnated subsequently
with suitable substances such as red oxide of lead, turpentine or the like, in well
known manner and is then ready for use.
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. The manufacture of driving or transmission bands or belts on a double rib
loom, characterized by one or more thread guides alternately placing their threads
on two series of needles, two weft thread guides each simultaneously introducing
a weft thread at the sides of the warp thread stretched between the series of needles
after the completion of each series of loops.
2. A driving or transmission band or belt having strong edges and perfectly
uniform flat surfaces connected together, owing to the warp threads, which
tighten the transverse and longitudinal weft threads-alternately being connected
together on the right and on the left to two series of loops, stretching of the band
being prevented owing to the double series of loops.
3. A driving or transmission band or belt substantially as described or illustrated
in Figure 2 of the accompanying drawings.
Dated this 24th day of August 1898.
BOULT & WADE,
Agents for the Applicant.