IMPROVEMENTS IN THE PRODUCTION OF TAPE-LADDERS
Year: 1882

page_text: LETTERS PATENT to James Carr of Hulme in the City of Manchester in the
County of Lancaster, Smallware Manufacturer for an Invention of
'IMPROVEMENTS IN THE PRODUCTION OF TAPE-LADDERS.”
PROVISIONAL SPECIFICATION left by the said James Carr at the Office of
the Commissioners of Patents on the 8th July 1882.
JAMES CARR of Hulme in the City of Manchester in the County of Lancaster,
Smallware Manufacturer, "IMPROVEMENTS IN THE PRODUCTION OF TAPE
LADDERS
"
My Invention relates to the tape ladders used in the formation of venetian
blinds and particularly to the article now well known as "Carr's Patent tape
ladder" which is completely woven in the loom with the cross strips woven in
their proper required positions. In the weaving of the said Carr's patent tape
ladders it is necessary to use at least three or four shuttles. The object of my
Invention is to lessen the cost of production by simplifying the action of the loom
and expediting the weaving of the article. I dispense with the shuttles which are
employed in the weaving of the cross strips and to form the cross strips I use yarn
or spun or twisted material or narrow tapes or braids which are woven into the
tapes of the ladder and extend from one tape to the other as in the said Carr's
patent ladder tape but are not interwoven with weft in the formation of the ladder
excepting at the points of attachment to the tapes. In some cases I use a number
of suitably strong yarns to form each cross strip these yarns being interwoven
with the tapes of the ladder at the points of attachment thereto. In lieu of these
yarns I may employ a single tape or braid or two or more narrow tapes or
braids. By means of my Invention I am enabled to produce a comparatively
cheap article which can be sold at a lower price than the said Carr's Patent ladder
tape.

page_text: .
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Carr in the Great Seal Patent Office on the 6th January
1883.
JAMES CARB of Hulme in the City of Manchester in the County of Lancaster,
Smallware Manufacturer "IMPROVEMENTS
LADDERS
"
IN THE PRODUCTION OF
"
TAPE
My Invention relates to the tape ladders used in the formation of venetian
blinds and particularly to the article now well known as Carrs Patent tape
ladder" which is completely woven in the loom with the cross strips woven in their
proper required positions. In the weaving of the said Carr's patent tape ladders
it is necessary to use at least three or four shuttles. The object of my Invention
is to lessen the cost of production by simplifying the action of the loom and
expediting the weaving of the article... I dispense with the shuttles which are
employed in the weaving of the cross strips and to form the cross strips I use
yarn or spun or twisted material or narrow tapes or braids which are woven into 1
the tapes of the ladder and extend from one tape to the other as in the said Carr's
patent ladder tape, but are not interwoven with weft in the formation of the ladder
excepting at the points of attachment to the tapes.
.
In order that the nature of my said Invention may be more fully understood I
have attached hereunto a drawing to which reference will be made in the following a
description of my Invention. The said drawing is a perspective view drawn about
double the full size of the example selected for illustration and represents a short
length of woven ladder tape. In the said drawings a, a, are the two broad tapes
of the ladder and b, 6' are cross yarns which take the places of the cross strips
which in my ordinary patent ladder tapes are woven by means of special shuttles 2
during the weaving of the complete ladder. In the example to take the place of
each cross strip I have used three strong yarns but I may use less or more than
three. The two tapes a, a¹ are woven simultaneously in the loom as when
carrying my former invention into effect the shuttles for weaving these two tapes
being alone required. The yarns for b. and 61 are contained on suitable warp
bobbins or holders and are woven into the top and bottom tapes alternately
portions to act as cross strips floating and not being woven either into the tape a
or the tape a. The horizontal lines b* indicate the portions of yarn which are
woven into the tapes. Shorter lengths of yarn float at the parts where the yarns
return from one tape to the other and have to be cut before the ladder can be 8
opened for use as in the case of my ordinary ladder-tape. In order that the yarns
may be firmly held so that they will not draw out of the tapes a, a¹ with any
ordinary strain it is advisable that the parts 6 of the said yarns woven in the
tapes shall be sufficiently long that the weft of the tapes may have a firm hold
upon the said yarns. In the example each set of cross yarns is woven with two
warps so that four warps are required for the two sets of cross yarns the two
warps for each set being used alternately to form the cross yarns that is to say
the cross yarns 6 are in one warp and the intermediate cross yarns 6¹ are in
another warp. The effect of this is that instead of the yarns having to float after
being woven into one of the tapes for about half an inch the weaving in is 4
continued until the floating is required for the formation of the next cross strip
yarns but one the other warp being caused to float to form the next cross yarns,
Although I consider this method of weaving by the employment of duplicate warps
of cross bar yarn to produce the best results and the strongest tape ladder I do
not confine myself to this method and may use only one warp for each set of cross
yarns on each side of the tape ladder, I may use any suitable kind of yarn or

page_text: twisted or braided material or narrow tapes which have been previously woven
the object being to dispense with the necessity for weaving cross strip tapes
during the formation of the tape ladders as herein before set forth.
Having now fully sett forth and indicated the nature of my said Invention and
the manner in which I carry the same into practical effect I would have it to be
understood that I claim
First the method of producing tape ladders substantially as set forth and
indicated hereinbefore with reference to the accompanying drawings.
And secondly the method of producing tape ladders by employment of
suitably strong yarns, braids or tapes which are woven in with the main tapes
and float from one tape to the other to form cross sustainers for the blind
laths but are not woven together at the parts which so float or cross from one tape
to the other substantially as set forth and indicated.
In witness whereof I the said James Carr have hereunto set my
hand and
seal this fifth day of January in the year of our Lord one thousand eight
hundred and eighty-three
Signed sealed and delivered
in the presence of
EDWARD K. DUTTON
41 John Dalton Street, Manchester.
(Agent for the Patentee)
JAMES CARR (L.S.)