Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring

Producing shaped articles from the material by using presses; Presses specially adapted therefor > wherein one or more rollers exert pressure on the material > Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring

Producing shaped articles from the material by using presses (shaping on moving conveyors B28B5/00); Presses specially adapted therefor (presses in general B30B) > wherein one or more rollers exert pressure on the material > Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring