Except the appearance of door, many door and lock design is very functional. Surely the design of the door start convenient, safe and sturdy needs, whether it is side door, revolving door, sliding door or shutter door.
The 1st century AD, the ancient Greek scholar, Hero of Alexandria (Ἥρων ὁ Ἀλεξανδρεύς), designed an automatic door, which is the first automatic door in the world.
A gate is very common in 16th and 17th century in Dutch, which called “Dutcg door”. It was divided into two parts, the upper is denpendent of switch. When opened, people can talk, even hand something and be ventilated, only not out.
Ture “innovation” is evolution door, which open the door in a really cool new way. It looks like a two door magically separated and then closed. Which is designed by Austria Klemens Torggler.
KBB also can be a leading flag in the revolving door. Which is keeping pace with the international advanced technology and designing trend, treating the quality as the life of company, controlling the quality management strictly, manufacturing each door by heart.