Grape processing - four stations from top to bottom:

1. All leaves, green grapes and other extraneous material removed before reaching the stemmer. This will sometimes include rocks and pickers’ shears.

2. The stemmer. A rotating cylender forces grapes out through small apertures by centrifugal force while allowing the stems to exit from the cylender.

3. The grapes pass over a screen in a shaking table which drops and removes smaller material.

4. On the conveyor all stem jacks and anything else, (MOG - material other than grape), that made it through is removed. 

To see slide show photos