Abstract: The present invention is at least one spacer selectively connected to an end spacer by a backing portion, where the at least one spacer is removed from the end spacer by severing the backing portion.

Abstract: A roof panel (20) for a sun room has a polystyrene foam core (40) and two aluminum covers (42) and (44) adhered to the top (41) and bottom (43) of the foam core. At least one groove (46) is cut into the foam core and a rib (56) is laterally fitted into the groove. The rib has its minor axis vertically oriented and its major axis running longitudinally with or parallel to the longitudinal axis of the panel to provide significant increase in strength to the panel.

Abstract: A system for on-site recovery of reusable industrial waste components, such as solvents, from a liquid waste stream includes a trailer that is internally partitioned to separate system components through which the waste stream passes in a first partitioned section of the trailer from support and control components in the second trailer section. Input waste is fed into a horizontal thin-film evaporator within the first trailer section, while steam is fed in a closed loop through the evaporator from the second section of the trailer for evaporating volatile solvents in the waste stream, and thereby separating the volatile solvents from non-volatile liquid and solid components of the waste stream. The evaporated volatile solvents are fed to a heat exchanger, again enclosed within the first partitioned section of the trailer, for recondensation through heat exchange with a coolant fed to the heat exchanger in a closed loop from the second trailer section.

Abstract: A system for repairing a crack in a pane of plate glass in which a rotatable shaft extends through the glass and carries cutters on both sides for concurrently cutting an aperture therein from both sides.

Abstract: The invention provides for repairing a crack in a pane of plate glass caused by the impact of a hard object without removing the glass from its location by cutting out a section from the glass surrounding the crack and replacing it with a disc of a similar sheet of glass.