Alfa battery is suitable for residential bathroom- and toilet doors. The handle indicates the bathroom is occupied with a red light on the outside of the door when the thumb turn is activated. When the bathroom is vacant the handle signals no light.

Tanaka Auto Door

Cleanliness, efficiency, compactness.
This new design entails strips equipped with infrared sensors that open to the approximate shape of the person or object passing through, minimizing entry of dust, pollen, and bugs while keeping precious air-conditioning in.

Video - Door Demo
http://www.youtube.com/watch?v=vv2JfoLyU80&mode=related&search=

Casting

Casting is a manufacturing process by which a molten material such as metal or plastic is introduced into a mold, allowed to solidify within the mold, and then ejected or broken out to make a fabricated part. Casting is used for making parts of complex shape that would be difficult or uneconomical to make by other methods (such as cutting from solid material).