Patent ID: 8851275

Claim:
A screening examination system, comprising: a first conveyor unit receiving test products fed thereto at a first speed, said first conveyor unit comprising: a first drive wheel; a first tension wheel; a first fixed wheel; a first movable wheel set; and a first conveyor belt wound around said first drive wheel, said first tension wheel, said first fixed wheel and said first movable wheel set and rotatable to deliver test products upon rotation of said first drive wheel; a second conveyor unit, said second conveyor unit comprising: a second drive wheel; a second tension wheel; a second fixed wheel; a second movable wheel set; and a second conveyor belt wound around said second drive wheel, said second tension wheel, said second fixed wheel and said second movable wheel set and rotatable to carry test products from said first conveyor belt upon rotation of said first drive wheel; a first sensor unit arranged between said first conveyor unit and said second conveyor unit to detect falling of said test product between said first conveyor unit and said second conveyor unit, wherein as said first sensor unit detects falling of said test product, said first movable wheel set is moved to said second movable wheel set, and the position of said second movable wheel set is maintained; a second sensor unit arranged above said second conveyor unit to detect said test products being carried on said second conveyor unit, wherein as said second sensor unit detects passing of said test product, said second movable wheel set and said first movable wheel set is moved in direction toward said first conveyor unit; an examination unit arranged above said first movable wheel set to examine test products being delivered by said first conveyor unit and discriminate between a quality product and a defective product, wherein as said examination unit examines said defective product, said second movable wheel set is moved toward said second conveyor unit, and the position of said first movable wheel set is maintained; whereby movement of said first movable wheel set and said second movable wheel set are determined by the examination result of said examination unit and the detection results of said first and second sensor units; and, said first conveyor unit being adaptively varied to maintain a conveying speed different from the first speed responsive to the examination result.