The developed machine was based in the principle of deboning
fish by forcing the flesh through small holes combining compression
and shear action over the product, so the fish bones are forced
to lay flat over a perforated surface. This allows for the extrusion of
meat through the holes, so not only the bones, but also scales and
skin are kept on the outer side of the drum. A perforated drum was
set up along with means for providing cyclic pressing and shearing
action on process product against it.