High-security self-rising access frame door

Abstract

A closure system for the access opening in a barrier to an enclosed space for confining individuals. The closure system has an assembly for operatively associating with the access opening, wherein the assembly provides a rear frame plate, a front frame plate, middle spacer plates and a sliding door slidable between the frame plates to move between an open position and a closed position closing off the access opening. One or more door springs configured to bias the sliding door in a partially open position, when the sliding door is unlocked by an associated locking mechanism, and thereby providing single-handed functionality. Dual purpose guide-security bars along a rear surface of the sliding door are configured for both preventing the sliding door from getting jammed when sliding and for preventing a confined individual from tampering with the locking mechanism by way of the space between the rear and front frame plates.

Dependencies are inferred from the claim text.