Improvements in Ladder Tapes for Venetian Blinds
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Ladder Tapes for Venetian Blinds."
I, SOLOMON BUTTERWORTH of 16 Clapperhill Grove, Old Trafford, Manchester,
Overlooker, do hereby declare, the nature of my said invention to be as follows:-
My invention refers to ladder tapes or ladder tape webbing for. Venetian blinds,
and has for its object to give such tape or webbing rounded or .thickened edges
and thereby to give to the ladder tape a better finish and appearance, and make it
stronger and more durable than the ladder tapes as at present made..
To effect such rounding of the tape edges, I use four healds for weaving the
middle parts of the webbing and four healds for the respective edges, and I employ
four cams, to alternately raise and lower three healds and then one heald for the
weaving of the respective edges of the tape. I also take some additional warp
threads, or I take some of the warp threads near the edges of the webbing, and
weave them in with those already at the extreme edge of the tape, and in such
manner I produce the rounded edges.
Dated this 24th day of September 1896.
SOLOMON BUTTERWORTH,
By John G. Wilson & Co.,
Agents.
1)
COMPLETE SPECIFICATION.
Improvements in Ladder Tapes for Venetian Blinds.
I, SOLOMON BUTTERWORTH of 16. Clapperhill Grove, Old Trafford, Manchester,
Overlooker, 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:-
My invention refers to ladder tapes or ladder tape webbing for Venetian blinds,
and has for its object to give such tape or webbing rounded or thickened edges
and thereby give to the ladder tape a better finish and appearance, and make it
stronger and more durable than ladder tapes as at present made.
To effect such rounding of the tape edges, I use four healds for weaving the
middle parts of the webbing and four healds for the respective edges, and I employ
four cams to alternately raise and lower three healds and then one heald for the
weaving of the respective edges of the tape. I also take some additional warp
threads, or I take some of the warp_threads near the edges of the webbing, and
weave them in with those already at the extreme edge of the tape and in such
manner I produce the rounded edges.
And in order that my said invention may be more readily understood and carried
P11

page_text: into practical effect I have hereunto annexed a sheet of drawings, and will now.
proceed to describe the same with the figures and letters of reference marked
thereon.
Fig. 1 illustrates in perspective the four healds I employ for weaving the edges
of the ladder tapes and the arrangement of cords, levers and cams for operating
them.
Fig. 2 is a side view and Fig. 3 a cross-section of a ladder tape according to my
invention.
According to my invention I use four healds (not shewn) for weaving the middle
parts of the tapes and four healds 1, 2, 3, 4, for weaving the improved or thickened
edges I also use four healds (not shewn) in the ordinary way for weaving the
Additional warp threads are introduced for the edges of the tape and the order
of picks or the lift (rise and fall) of the healds 1, 2, 3 and 4 under the influence
of cams (5) or their equivalent, is as follows:-
cross tapes.
For the first pick healds (2), (3) and (4) are lifted and (1) remains down; for
the second pick' heald (3) remains up, (4) and (2) fall, and (1) still remains
down; for the third pick heald (1) and (4) lift, (3) remains up, and (2) remains
down and for the fourth pick' heald (4) remains up, (2) remains down and (1)
and (3) fall. The cycle of picks' is then repeated and so on continuously.
By so employing additional healds and threads, and operating the healds as
described, each web of the ladder tape is given thickened, rounded or beaded edges
as shewn in Figs. 2 and 3 which render the tape much stronger and more durable
than ladder tapes as at present made.
Having thus 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: A ladder tape for venetian blinds with the respective edges of the webbing
rounded, enlarged or formed of greater thickness than the middle portions, as set
forth.
2: Interweaving extra warp threads into the respective edges of the webbing
of ladder tapes for venetian blinds as set forth and illustrated on the accompanying
drawing.
Dated this 27th day of June 1897
SOLOMON BUTTERWORTH,
By John G. Wilson & Co.,
Agents.