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Tray assembly for attachment to folding chairs and other supporting structures. The tray assembly includes a base adapted to be mounted on a supporting structure, a support arm which is mounted on the base, and a tray which is mounted on the support arm. The support arm has first and second cylindri

Tray assembly for attachment to folding chairs and other supporting structures. The tray assembly includes a base adapted to be mounted on a supporting structure, a support arm which is mounted on the base, and a tray which is mounted on the support arm. The support arm has first and second cylindrical mounting pins which are received in tight frictional engagement in semi-cylindrical mounting ferrules on the base and the tray. The pins can be rotated within the ferrules to move the support arm and table to different angular positions relative to the base and the support arm, with the support arm and the table being held securely in the different positions by the frictional engagement between the pins and the ferrules.

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In a tray assembly for use with a support: a base adapted to be mounted on the support and having a pair of semi-cylindrical mounting ferrules spaced apart along an axis which is oriented in a vertical plane when the base is mounted on the support, an L-shaped arm having a generally planar body with

In a tray assembly for use with a support: a base adapted to be mounted on the support and having a pair of semi-cylindrical mounting ferrules spaced apart along an axis which is oriented in a vertical plane when the base is mounted on the support, an L-shaped arm having a generally planar body with first and second sets of mounting pins disposed along generally perpendicular edges thereof, said first set of mounting pins snapping into the ferrules on the base and being gripped thereby with a frictional engagement which permits the arm to be rotated about the axis of the ferrules to align the second set of mounting pins in a generally horizontal plane, and a tray having a pair of spaced apart ferrules which snap onto the second set of mounting pins and grip the same so that the tray can be rotated about the horizontally aligned set of pins to a level position where it remains due to frictional engagement between the ferrules and the pins, said base, said arm and said tray each being fabricated of a plastic material with the mounting pins and ferrules being formed as integral parts thereof.