Abstract: The present air compressor system includes an inlet connected to a compression stage, a cooling stage having an inlet connected to an outlet of the compression stage and having an outlet passage; a drain valve having an liquid inlet in and adjacent a bottom of the outlet passage of the cooling stage to drain condensation when opened; and a controller controlling the compression stage and the drain valve.

Abstract: A non-pressure head for a fluid cylinder, which includes a drain channel formed in the flange by a raised portion of the flange extending from a plane of the flange in the same direction as the head portion. The channel is cold formed in the flange. For the piston stop, the flange has an opening of a diameter smaller than a diameter of a piston on the piston rod to form a stop for the piston. A plurality of spaced ribs are provided between the flange and the head. The ribs are raised portions of the flange and the head and are cold formed in the flange and the head.

Abstract: An upwardly open wallpaper wetting trough made from flexible polystyrene has a metal rod force fitted between the opposite ends of the trough and has vinyl tips fitted over the rod ends to protect the ends of the trough from puncture. An inwardly opening, outwardly extending channel is formed in each end of the trough to receive the ends of the rod in a force fit to maintain the rod in position while a sheet of wallpaper is being pulled through water in the trough guided by the rod.

Abstract: This invention relates to an improved prepasted wallpaper trough assembly having a thin walled polystyrene tray with a horizontal bar. The bar is engaged in place in the tray by forcing the ends of the bar downward into channels formed in the ends of the tray. The width of the bar is slightly larger than the width of the channels and therefore the channels resiliently engage the ends of the bar. Thus, the "memory" factor of the plastic which, when deformed attempts to return to its original shape holds the bar in place during the wallpapering operation. The assembly is simple and its shape enables it to be made extremely economically by vacuum forming.