Abstract: A page clamp has a pair of outward facing faces and a pair of opposed faces define by a pair of sides which converge adjacent one end of the clamp. A clip is positioned in spaced relation with one of the outward facing faces. The clip has one end connected to one outward facing face and a second end biased by the clip toward the one outward facing face. The outward facing face can include around the periphery thereof a plurality of tabs defining with the outward facing face a plurality of gaps that can receive an edge of a bookmark therein. A rim can extend normal to the outward facing face and substantially therearound. The bookmark and the outward facing face can also include magnetic material for creating a magnetic attraction therebetween.

Abstract: A method of manufacturing an extruder barrel is disclosed which fabricates a barrel in two longitudinal sections and joins the sections together by electron beam welding. In a preferred form, the barrel sections are formed by machining conical recesses longitudinally in each section whereby a complementary bore is defined by the assembled barrel sections. The machined recesses may be formed with spiral, longitudinal or radial grooves. The recesses may be a uniform conical shape, stepped conical or a dual tapered shape.

Abstract: Low alloy steel having an ultra low carbon content is produced using the basic oxygen process wherein an inert gas is introduced into the melt when the melt has a carbon content below about 0.06 weight percent, the oxygen flowrate is adjusted to from 10 to 40 percent of the inert gas flow rate and the oxygen lance height is reduced to from 30 to 60 percent of the normal lance height.