METAL SHEETS PROTECTED BY COATING

Brand	Owner	Address	Description
RP	N. H. ROBERTSON COMPANY	FARMERS BANK BUILDING FIFTH AVENUE AND WOOD STREET PITTSBURGH PA	[METAL SHEETS PROTECTED BY COATING MATE RIAL FOR BUILDING CONSTRUCTIONS,] METAL FLOORS, CORRUGATED METAL SHEETS FOR ROOFS, FLOORS, AND WALL PANELS, LAMINATED METAL SHEETS FOR USE IN THE CONSTRUCTION OF BUILDINGS,[ VENEERED METAL SHEETS FO R CONSTRUCTION PURPOSES AND FOR THE INTERIOR FINISH OF BUILDINGS, SKYLIGHTS, METAL SASH, AND METAL DOORS.;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

Two metal blocks (50, 52) are welded to respective metal sheets (30, 32) to form sealed assemblies. The sealed assemblies are then diffusion bonded together to form two metal preforms (54, 56). The thick ends (36) and (40) of the metal sheets (30, 32) and the metal blocks (50, 52) are hot formed so that a continuation of the plane X of the first surfaces (42, 46) of the metal sheets (30, 32) extends through and across the metal blocks (50, 52). The metal preforms (54, 56) are machined to remove the portion of the metal blocks (50, 52) extending above the first surfaces (42, 46) of the metal sheets (30, 32) respectively. The metal preforms (54, 56) and a metal sheet (58) are assembled into a stack (64). The metal preforms (54, 56) and the metal sheet (58) are diffusion bonded together and then superplastically formed to produce a hollow fan blade (10). The method enables thinner metal workpieces with better microstructure to be used and increases the yield of metal workpieces.