Abstract: A method for forming a resist pattern on a substrate (18) places a donor element (12) having a layer of thermoresist material proximate the substrate. A gap is maintained such that the surface of the layer of thermoresist material is spaced apart from the surface of the substrate by a number of spacing elements. Thermal energy is directed toward the donor element (12) according to the resist pattern, whereby a portion of thermoresist material is transferred from the donor element (12) across the gap by ablative transfer and is deposited onto the substrate (18) forming the resist pattern.

Abstract: The present invention provides a two stage fuel pump which is particularly suited for piston aircraft engines. The fuel pump includes a housing having a fuel inlet and a fuel outlet where the fuel inlet is open to a cylindrical swirl chamber formed in the housing. The first pump stage has its inlet open to the inlet chamber and its outlet open to an intermediate chamber formed in the housing. The second pump stage has its inlet open to the intermediate chamber while its outlet is fluidly connected through a fuel control valve to the fuel outlet. A pressure responsive valve is fluidly connected between the intermediate chamber and inlet chamber and recirculates fuel from the intermediate chamber and to the inlet chamber whenever the pressure in the intermediate chamber exceeds a predetermined pressure.