Systems and Methods to Retain and Refeed Door Curtains

摘要

Systems and methods to retain and refeed door curtains are disclosed. An example door is disclosed that includes a track and a curtain that includes a leading section. The curtain is to be in at least one of a breakaway state or a normal state, and in at least one of a folded condition or an unfolded condition while in the breakaway state such that: (a) in the normal state, a lateral section in an area proximate the leading section is in guiding engagement with the track; (b) in the breakaway state while in the folded condition, the lateral section in the area proximate the leading section is dislodged from the track and folded over onto the main section to define an enfolded space; and (c) in the breakaway state while in the unfolded condition, the lateral section in the area proximate the leading section is dislodged from the track but not folded over onto the main section. The example door also includes an unfolder to be in a position to engage the lateral section proximate the enfolded space as the leading section moves toward an open position while the curtain is in the folded condition.

主权项

1. A door for selectively blocking and unblocking a doorway through a wall, the door comprising:
a first track; a second track to be spaced laterally from the first track to define a span between the first track and the second track; a curtain comprising a main section, a first lateral section, a second lateral section, and a leading section; the first lateral section to extend into the first track, the second lateral section to extend into the second track, the main section extending between the first lateral section and the second lateral section, the main section to be spaced apart from the first track and the second track, and the leading section to be below the main section and extending between the first lateral section and the second lateral section, the leading section to be movable selectively to a closed position and an open position, the curtain to block the doorway when the leading section is at the closed position, the curtain to unblock the doorway when the leading section is at the open position, the curtain to be in at least one of a breakaway state or a normal state, and the curtain to be in at least one of a folded condition or an unfolded condition while in the breakaway state such that: a) in the normal state, the first lateral section in an area proximate the leading section is in guiding engagement with the first track; b) in the breakaway state while in the folded condition, the first lateral section in the area proximate the leading section is dislodged from the first track and folded over onto the main section to define an enfolded space between the first lateral section and the main section; and c) in the breakaway state while in the unfolded condition, the first lateral section in the area proximate the leading section is dislodged from the first track but not folded over onto the main section; and an unfolder to be disposed within the span between the first track and the second track, the unfolder to be in a position to engage the first lateral section proximate the enfolded space as the leading section moves toward the open position while the curtain is in the folded condition.