UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Rubber Hose: Braided, Spirally Wrapped and Vulcanized in Long Lengths
Henry Cobb's wrapped hose (Revere Rubber, US 1,230,867, 1917). A rubber tube is forced through a ring die, braided over while held open by pressure, wrapped by machine with a helical strip of frictioned fabric overlapping half its width, covered in rubber and vulcanized. Wrapping by machine instead of rolling bias-cut fabric by hand lets the hose run 500 ft or more, and Cobb says it stands nearly twice the bursting pressure.
The patent gives no sizes, recipes or cure times. Couplings are not part of it: an air hose is this hose with couplings fitted. The picture: the patent's sheet 1.
Hejuru
1 day
Amabwiriza
1
1
Force the inner tube
Force the inner tube
Force vulcanizable rubber compound through the ring-shaped gap between the two parts of a tube die to make the inner tube (1).
Ibikoresho by'iyi ntambwe:
Ivangavanga ry’ikawucu1 batchIbikoresho bikenewe:
Iforomo yo gusohora umuyoboro2
2
Braid over the tube
Braid over the tube
Run the tube through a braiding machine that lays crossing helical strands over it (2), coating the strands with rubber compound as they braid. Keep the tube under air pressure so it does not collapse. Ours: the air from a compressor. The braid may be left out, but it holds the hose to size.
Ibikoresho by'iyi ntambwe:
Urudodo1 batchIvangavanga ry’ikawucu1 batchIbikoresho bikenewe:
Imashini iboha imigozi
Igikandamiza umwuka3
3
Cut the fabric along the warp
Cut the fabric along the warp
Cut frictioned fabric into a long strip lengthwise, along the warp threads; wound helically, both warp and weft then run round the hose as if cut on the bias.
Ibikoresho by'iyi ntambwe:
Umwenda winjijwemo ikawucu1 umuzingoIbikoresho bikenewe:
Icyuma gikata cy'akazi4
4
Wrap the strip half over
Wrap the strip half over
Feed the braided tube through the wrapping machine, which winds the strip (3) round it under tension, each turn over half the last: two plies, the whole length without stopping. For four plies wind a second strip (5) over the first, in the same pass or a second.
Ibikoresho bikenewe:
Imashini izinga imiyoboro5
5
Plies from the overlap
Plies from the overlap
Gupakira ikaye ya Jupyter…
6
6
Cover and vulcanize
Cover and vulcanize
Apply a layer of rubber compound (4) over the last winding for a smooth, protected outside. Vulcanize the hose for its whole length in a mould or otherwise.
Ibikoresho by'iyi ntambwe:
Ivangavanga ry’ikawucu1 batchIbikoresho bikenewe:
Iforomo yo guteka ikawucuIbikoresho
3- 1 batchUmwanya
- 1 batchUmwanya
- 1 umuzingoUmwanya
Ibikoresho bikenewe
6- Umwanya
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