Abstract: A stacking machine has a conveyor which supports skids onto which panels sheared from side-by-side strips of metal sheet fall, there to accumulate in stacks. As the stacks form, empty skids are organized on a skid positioning machine located to the side of the stacking machine, and there the spacing between the skids corresponds to the spacing between the skids already on the conveyor. When stacks are completed, the conveyor moves the skids on which they are formed away, and the skid positioning machine deposits the properly spaced empty skids on the conveyor which moves them into the positions where they receive the panels. To this end, the conveyor of the stacking machine may have powered rollers, while the skid positioning machine has a carriage provided with transfer beams configured to fit between the rollers.

Abstract: A machine for slitting metal sheet with rotating knives has roller assemblies which present rollers against the metal sheet immediately beyond the knives. The rollers bear against both faces of the slit metal sheet and straddle the slits, all to reduce distortion caused by the knives and to iron out burrs. The roller assemblies are fitted to tracks on the slitting machine and may be moved along those tracks to accommodate relocation of the knives.

Abstract: A stacking machine has a conveyor which supports skids onto which panels sheared from side-by-side strips of metal sheet fall, there to accumulate in stacks. As the stacks form, empty skids are organized on a skid positioning machine located to the side of the stacking machine, and there the spacing between the skids corresponds to the spacing between the skids already on the conveyor. When stacks are completed, the conveyor moves the skids on which they are formed away, and the skid positioning machine deposits the properly spaced empty skids on the conveyor which moves them into the positions where they receive the panels. To this end, the conveyor of the stacking machine may have powered rollers, while the skid positioning machine has a carriage provided with transfer beams configured to fit between the rollers.

Abstract: A clamping assembly for a machine that levels sheet metal by stretching the metal beyond its elastic limit includes two jaws which have generally planar gripping surfaces. When the jaws are forced together, the gripping surfaces on them bear against the sheet metal with enough frictional contact to enable a stretching force to be applied to the sheet metal. One of the jaws includes a bearing block and a gripping pad located along the bearing block, with the gripping surface for that jaw being on the pad. A shim that is narrower than the pad lies between the pad and the bearing block. When the pad is forced against the sheet metal, the shim behind that pad causes the pad to assume a slight contour that imparts convexity to its gripping surface. This concentrates the gripping force at the centers of the gripping surfaces on the two jaws, so that perceptible indentations do not develop in the strip at the side edges of the gripping surfaces.

Abstract: A sorting machine at the end of a sheet metal slitting and shearing line receives side-by-side stacks of sheet metal panels and separates and rearranges those stacks so that they are more easily wrapped, banded, or otherwise processed. The machine includes a roller conveyor which receives the side-by-side stacks and a platform located to one side of the conveyor. The platform has support beams which align with the rollers of the conveyor such that spaces exist between the succession of aligned rollers and support beams. Beneath the conveyor and platform a transfer carriage moves on tracks that extend transversely with respect to the conveyor. The carriage has transfer beams which occupy the spaces between successive aligned rollers and support beams.

Abstract: A clamping assembly for a machine that levels sheet metal by stretching the metal beyond its elastic limit includes two jaws which have generally planar gripping surfaces. When the jaws are forced together, the gripping surfaces on them bear against the sheet metal with enough frictional contact to enable a stretching force to be applied to the sheet metal. One of the jaws includes a bearing block and a gripping pad located along the bearing block, with the gripping surface for that jaw being on the pad. A shim that is narrower than the pad lies between the pad and the bearing block. When the pad is forced against the sheet metal, the shim behind that pad causes the pad to assume a slight contour that imparts convexity to its gripping surface. This concentrates the gripping force at the centers of the gripping surfaces on the two jaws, so that perceptible indentations do not develop in the strip at the side edges of the gripping surfaces.

Abstract: A machine for advancing a strip of sheet metal in measured increments includes a main frame and subframes supported on transverse ways on the main frame so that the subframes may be moved toward and away from each other to vary the spacing between them. The subframes lie along a path that accommodates the sheet metal strip, and at their forward ends have fixed gripping units which clamp down on the strip to prevent it from moving in the path. The subframes have tracks along which movable gripping units move to and fro. The movable gripping units also have the capacity to clamp down on the strip. Each subframe also carries an endless chain which is driven by a hydraulic motor on the subframe to move the movable gripping unit for the subframe along its track. Basically, the movable gripping units alternately grip the strip and advance it, so that while one gripping unit is propelling the strip forwardly, the other is returning to its initial position to thereafter grip the strip and propel it.

Abstract: A solar heating system includes an array of solar collectors and a manifold through which the collectors are supplied with water, this water being derived from a storage tank located below the collectors. The water is circulated through the collectors by a pump, and within the collectors the water is heated, but when the pump is not operating, the water drains from the collectors into the tank so it will not freeze and damage the collectors. Each solar collector includes a housing, a collector panel in the housing and containing a cavity through which water is circulated, supply and drain pipes which extend the full height of the housing behind the panel and are connected through ports with opposite ends of the panel cavity, and a light transmitting material over the housing. The supply and drain pipes of some of the collectors are plugged into corresponding supply and drain fittings on the manifold at bushings which fit into aligned ends of the pipes and fittings.