Importance

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Abstract

A thread box assembly includes a framing body coupled with a moveable arm of a thread box system that positions rails of a track. The framing body includes external framing walls with an upward facing open side. The framing body includes framing supporting walls between the external walls. Supporting walls may couple the framing walls with each other. The assembly includes a closing body that can be removably coupled with the framing body. The closing body includes opposing elongated bars and opposing internal coupling walls. The elongated bars are oriented perpendicular to the coupling walls. The closing body is fastened to the framing body to define and surround a central opening of the thread box assembly through which the rails extend during installation or replacement of the track without the closing body moving relative to the framing body.

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First Claim