Patent ID: 8163088
Filing Date: 2012-04-24
Classification: C23C

Abstract:
1. A loading device for densifying thin porous substrates by chemical vapor infiltration in a reaction chamber of an infiltration oven, the device comprising: first and second plates, each of the first and the second plates having a side face in registration with and opposing the side face of the other plate with a space therebetween and each having corresponding slotted portions disposed on said side faces; a tubular duct having an axis that coincides with an axis of the reaction chamber and that is disposed between the first and second plates, the tubular duct opening out in the space between the opposing side faces in order to enable a reactive gas to be admitted to or removed from said duct, wherein the slotted portions are structured and arranged for holding the substrates at points along a radial dimension outward from said tubular duct so that said substrates extend radially from the tubular duct and along substantially the entire vertical extent of the tubular duct, and wherein the tubular duct includes a plurality of orifices for distributing or removing the reactive gas along the main faces of the substrates in a flow direction that is essentially radial.