Chase Doors is the world's oldest, largest, and most progressive manufacturer of double-acting impact traffic doors and specialty doors. Chase Industries, Inc., founded by Chase Blum in 1932, began its operation as an insulated walk-in cooler and specialty refrigeration equipment manufacturer. Shortly after, Chase pioneered the original flexible AirGard™ Door with its unique top-mounted-only gravity hinging system. That door is still on the job today in food processing, industrial manufacturing and retail stores. Since then, Chase has expanded its line of doors to include impact traffic doors, double-acting swing doors, strip curtains, pvc vinyl rolls, corrosion resistant doors, fiberglass doors, cold storage door, sliding fire doors, sliding service doors, pharmaceutical doors, bug screen doors, vinyl roll-up doors, industrial curtains, and air doors. — See more at: http://chasedoors.com/about_main.asp#sthash.yRqJNzMB.dpuf