Patent ID: 7255233

Claim:
Apparatus for separating mixed plastics using flotation techniques comprising: a first stage initial washing tank for washing incoming plastics and providing a first separation process; said first stage initial washing tank includes a perforated basket to hold heavy materials; and at least one separation module; said separation module including a separation tank, said separation tank having no moving parts; said separation tank being a generally circular tank and having a substantially flat bottom; said separation tank containing a separation solution: said separation tank having a discharge line for collecting floaters and a siphon for collecting sinkers; a feeding section coupled to the separation tank for feeding of mixed plastic stream into the separation tank; said feeding section including a circular feeding tube extending into said separation tank; and said circular feeding tube including a portion located below a level of said separation solution in the separation tank; and a collecting section for collecting a plurality of separated mixed plastics including floaters and sinkers from the discharge line and the siphon provided with the separation tank.