Guide rod apparatus

Abstract

First and second horizontally disposed parallel guide rods are provided to guide an object. First and second roller assemblies are fixed to the object and rollingly connect the object to the first guide rod and a third roller assembly fixed to the other side of the object rollingly connects the object to the second guide rod. The third roller assembly comprises a shaft fixed to the object and a roller carried by the shaft which rollingly rides on the top of the second guide rod. The first and second roller assemblies each comprise a shaft fixed to the object carrying first and second rollers spaced from each other along the shaft. The first and second rollers straddle the top of the first guide rod and rollingly ride on the upper surface thereof. The apparatus further comprises a shaft fixed to the object which carries a roller, the top of which rollingly engages with the lower surface of the first guide rod.

Dependencies are inferred from the claim text.