Guide system for vertically moveable flexible door

A low maintenance door comprising:

• a vertically movable flexible curtain including a top, bottom and side edges, said side edges including a thicker area along a substantial length thereof, each thicker area including a substantially continuous strip along the inner surface of the curtain and a substantially continuous strip along the outer surface of the curtain, said strips forming a double windlock,
• a rotatable barrel located above a door opening with said flexible curtain affixed thereto with the rotation of said barrel causing the flexible curtain to raise and lower into and out of the door opening,
• a guide system along each side of the door opening including inner and outer windbars to restrain said side edges of the curtain from escapement from the guide system under normal wind load or pressure condition, means separably mounting said windbars on the guide system to releasably retain the double windlocks in the guide system,
• said double windlocks on the side edges of the flexible curtain engaging with said windbars when an excessive impact such as a vehicle, is put upon the flexible curtain which causes release of said windbars thereby releasing said side edges of the curtain from the guide system thereby causing little if any damage to said flexible curtain or guide system.

A low maintenance door comprising:

• a vertically movable flexible curtain including a top, bottom and side edges, said side edges including a thicker area along a substantial length thereof, each thicker area including a substantially continuous strip along the inner surface of the curtain and a substantially continuous strip along the outer surface of the curtain, said strips forming a double windlock,
• said vertical flexible curtain moving in a guide system substantially vertically straight during vertical movement to and from a position above a door opening,
• said guide system extending above the door opening for guiding the flexible curtain, and means moving the flexible curtain vertically to move the entire flexible curtain to a position above an upper edge of the door opening,
• said guide system along each side of the door opening including inner and outer windbars to restrain said side edges of the curtain from escapement from the guide system under normal wind load or pressure condition, means separably mounting said windbars on the guide system to releasably retain the double windlocks in the guide system,
• said double windlocks on the side edges of the flexible curtain engaging with said windbars when an excessive impact such as a vehicle, is put upon the flexible curtain which causes release of said windbars thereby releasing said side edges of the curtain from the guide system thereby causing little if any damage to said flexible curtain or guide system.

A low maintenance door comprising:

• a vertically movable flexible curtain including a top, bottom and side edges, said side edges including a thicker area along a substantial length thereof, each thicker area including a substantially continuous strip along the inner surface of the curtain and a substantially continuous strip along the outer surface of the curtain, said strips forming a double windlock,
• means for raising and lowering the flexible curtain into and out of the door opening,
• a guide system along each side of the door opening including inner and outer windbars to restrain said side edges of the curtain from escapement from the guide system under normal wind load or pressure condition, means separably mounting said windbars on the guide system to releasably retain the double windlocks in the guide system,
• said double windlocks on the side edges of the flexible curtain engaging with said windbars when an excessive impact such as a vehicle, is put upon the flexible curtain which causes release of said windbars thereby releasing said edges of the curtain from the guide system thereby causing little if any damage to said flexible curtain or guide system.