Abstract: A reboiler and method of generating vapor from a liquid comprising a rectifying section and an evaporating section in which the evaporating section comprises a plurality of upright evaporator tubes (2) connected at their upper ends to a tube sheet (6), means for supplying liquid to the evaporator tubes and means (22) for heating the surface of evaporator tubes (2), the lower ends (4) of the evaporator tubes being sealed and each evaporator tube being provided with a concentrically positioned inner tube (8) extending from the upper end of each evaporator tube (2) to a position above the sealed end (4) of each evaporator tube and in which the rectifying section comprises a series of trays containing liquid and means for directing vapor generated in the evaporating section through the trays.

Abstract: Welding apparatus for positioning a tube with respect to a tubesheet and then tack welding the tube to the tubesheet. The welding apparatus has a pilot which can be positioned within the tube and then expanded so that when the pilot is moved the tube can be moved against a tube stop on the main body of the welding apparatus which can then be moved so that the tube is in a predetermined position with respect to the tubesheet and the welder can be energized to tack weld the tube preparatory to the final welding operation which permanently fixes it to the tubesheet.

Abstract: This invention is directed to an improved container made of corrugated paperboard or the like. Appropriately shaped slots in the bottom lock panels permit a fast-locking action without any binding as in conventional containers that are designed for interference fit.

Abstract: This invention is directed to an improved thermoplastic coated paperboard carton commonly employed in the packaging of milk, orange juice, and other dairy and juice products. A novel gable-top closure having an upstanding ridge with a recessed upper edge will permit a stacked carton to be supported at the ends of the ridge of the supporting carton instead of the central portion thereof to reduce damage at the bottom area of the supported carton caused by rubbing during transport.

Abstract: A bottom sealing tab breaking method and apparatus for a paperboard carton bottom construction. The invention may be employed with existing apparatus for prebreaking paperboard container bottoms.

Abstract: An apparatus and method are disclosed for forming a multi-compartmented tray from a sheet material without tearing or bowing. At least a portion of one compartment, and preferably the entire compartment, is formed in advance of other compartments. The apparatus for doing so comprises a preformer on the male die for forming the first compartment before the rest of the male die engages the workpiece.