THIRD AND FOURTH GEARING DOOR UNIT WHICH PREVENTS HEAVY METAL CONTAMINATION AND MAKES THE IMPROVED DESIGN

摘要

PURPOSE: A third and fourth gearing door unit is provided to manually open and automatically close a door without pollution.;CONSTITUTION: A connecting socket(8) is attached to a pulley(7) of both sides of decoration housing and a wire(3) which is wound in a double pulley. A door width adjusting valve(29) is equipped to be control the width of a door. A hemisphere design tape of the PE material is attached the connecting socket.;COPYRIGHT KIPO 2010