Vibratory classifier apparatus

A vibratory classifier comprising:

• a first sidewall defining a first plane;
• a second sidewall defining a second plane, said first plane separated from said second plane by a distance along a transverse direction;
• a vibratory mechanism supported at least partially on said first and second sidewalls, said vibratory mechanism configured to induce vibration of the classifier;
• at least a first screen disposed at least partially between said first sidewall and said second sidewall, wherein upon vibration of the classifier, material moves along said first screen in at least a longitudinal direction generally perpendicular to said transverse distance;
• a feed box disposed at least partially in an inlet region of the classifier, said inlet region disposed at least partially rearward of said first screen along said longitudinal direction, said feedbox comprising:
• a classifying surface having openings therethrough;
• and
• a lower surface disposed at an angle below horizontal, said lower surface being disposed at least partially beneath said classifying surface to receive undersize material that passes through said classifying surface, said lower surface being disposed to transfer said undersize material onto said first screen,
• wherein said lower surface is pivotable between an operating position and a maintenance position;
• wherein in said maintenance position an access opening is disposed between said lower surface and said classifying surface, wherein said access opening permits access to a rear portion of said first screen.