To separate the cotton fibres from the seed.


The seed cotton is fed upon the lattice and carried forward to the spiked roller, which loosens the cotton and throw; it into the hopper.



In hopper, the seed cotton comes into contact with rapidly revolving saw roller. App.70 saws are threaded on a shaft.

As the saws revolve, the teeth carry the fibres forward, but it is impossible for the seeds to follow and also, due to the heavier beating of the rapidly revolving saws on the seed cotton, the fibres are separated from seed and taken round until the brush strips the fibre from the teeth.

Empty seeds husks and other broken seeds are thrown into grid, through which they pass into suitable receptacle. An air current from the cage draw the fibres along the trunk passage, and on reaching the revolving cage are brought under the pressure roller and delivered as a sheet, from which it is taken to the baling press.


The bars (I) are adjusted at K. The plate, adjustable at H, can be regulated to prevent the seeds falling away until thoroughly cleaned. An air current from cage should be optimum to 'suck only fibres. If air current is high - it will "suck seed also with fibres. If air current is low - fibre accumulation under brush roller causes to block the machine.

Saw gin is suitable to process American cotton and wherever American cotton is grown, such as west Africa- India, Ceylon etc.

These cottons are '.oil a "type in which-' the fibres are not too easily separated from the seeds, so heavier beating on seed is required to separate the fibres. This is achieved in this gin by giving heavier beating of the rapidly revolving saws on the seed cotton.