Patent ID: 9212451
Filing Date: 2015-12-15
Classification: D06F,F24H,H05B

Abstract:
1. An electrical resistance heater assembly comprising: a) a heater housing forming a channel having a longitudinal axis for a fluid to pass through; b) a heater support plate; and c) a first mica board assembly mounted to the heater support plate at a first level and a second mica board assembly mounted to the heater support plate at a second level, each mica board assembly supporting a heater ribbon running in a looped configuration along rows that are generally perpendicular to the longitudinal axis of the channel; adjacent rows terminating in a plurality of openings configured to turn the ribbon 180 degrees for travel from one row to an adjacent row; d) wherein the first level is positioned adjacent an inlet of the heater housing and the second level is positioned downstream of the first level, the first level and a side of the heater housing forming a passageway for the fluid to enter the heater housing and be directed to heater ribbons of the second level without having to pass over heater ribbon of the first level.