Abstract: A method is disclosed for shaping parts made of tungsten and of tungsten with thoria. The method involves machining the parts with a machining apparatus wherein the machining tool is made of diamond or material of which tungsten carbide is the main phase, the material having a hardness of greater than about 91 Rockwell A, the machining being done at a speed of from about 40 to about 120 surface feed per minute, and a feed rate of from about 0.0002 to about 0.006 inches per revolution. Machining of parts made of tungsten is done with cooling with a halocarbon solvent. Machining of parts made of tungsten and thoria can be done with or without cooling.

Abstract: An aluminum food product container or can having an easily opened can end seamed to one end of the can body. The outer surface of the can end member has a score line along which the can end is severed for opening the can and removing an end panel. The score line is located adjacent and above a shoulder in the can body extending inwardly below the seam. A protective double fold is formed in the can end by extending the end metal annularly inwardly in a first layer from the score line, then reversely outwardly in a second layer beneath the first layer to a location circumferentially underlapping the score line location, and then reversely inwardly in a third layer beneath the first two layers into the can end panel portion. The double fold formation presents a dull hazard-free edge to the end panel when torn from the can end member.