Fixed recessed grid in air changer - has edge grooves accommodating slotted movable grid and flexible pressure plate similarly recessed

摘要

The air changer has a fixed grid (1) provided with recesses and opposite this grid's inner side is a similarly recessed but movable grid (2) which is fitted displaceably in grooves located on opposite sides of the fixed grid's inside surface. In the grooves with the movable grid is a displaceable elastically bendable plate (3) which presses the movable grid against that which is fixed. This bendable plate also has recesses which are located opposite those on the movable grid.