Abstract: Oil is delivered by a single pumping means to an application header which extends across the path of movement of an electrically grounded metal strip requiring oiling. A perforated plate within the header divides it into two chambers and forms a diffuser between the two chambers to assure an even distribution of oil in the chamber which receives its oil by passage through the diffuser. The perforated plate also forms a charging electrode for oil filling the header and serves a third purpose in that it is a final filter for the oil passing through the header. The header has oil delivery orifices or a continuous delivery slot leading from the chamber of the header which faces the metal strip. Oil is attracted in small discrete streams onto the surface of the grounded strip traveling in near proximity to the header and the strip is uniformly coated with oil across its full width. Excess oil is recovered and returned to the pumping means for recycling in the system.

Abstract: A high voltage charge at very low amperage is impressed on a bath of oil or other lubricant in a dielectric header through a submerged electrode. A grounded high speed moving metal strip attracts streams of the charged bath across its width through apertures or slots provided in the header. Pressurized gas jets directed at these streams disperse the streams into a multitude of finer crossing streams which coat the strip completely and evenly. A recovery system for the oil or other lubricant is provided.

Abstract: While liquid coolant in the form of pressurized sprays is being delivered onto the upstream sides of the working rolls in a rolling mill across the width of the moving metal strip, pressurized fluid jets are directed against the opposite end portions of the working rolls outwardly of the longitudinal edges of the strip, said jets being aimed axially outwardly toward the ends of the working rolls and somewhat upwardly and downwardly in relation to the top and bottom faces of the strip. Closely beyond the downstream sides of the working rolls, additional pressurized fluid jets are directed downwardly and upwardly against the moving strip with the air concentrated near its longitudinal edges to dislodge any remaining coolant.

Abstract: A high voltage charge at very low amperage is impressed on a bath of oil or other lubricant in a dielectric header through a submerged electrode. A grounded high speed moving metal strip attracts streams of the charged bath across its width through apertures or slots provided in the header. Pressurized air jets directed at these streams disperse the streams into a multitude of finer crossing streams which coat the strip completely and evenly. A recovery system for the oil or other lubricant is provided.

Abstract: To facilitate manufacture and field maintenance of an electrical liquid coolant valve module, hard wiring is eliminated from the valve head and is replaced by a printed circuit card engaged by spring contact probes removably held in each replaceable solenoid unit of the module. A magnetic-non magnetic control poppet for each solenoid unit eliminates a dynamic seal for the poppet resulting in a very fast response time and better shut-off characteristics. System fluid pressure assists in closing the magnetic-non magnetic poppet. A replaceable poppet seat is made easily removable with a seat retainer which in turn enables removal of the two component poppet. The head of the valve module need not be separated from the coolant header when servicing solenoids and/or poppet seats, thus reducing the likelihood of starting leaks in the system.

Abstract: A descaling nozzle for hot rolled metal strips in a rolling mill has a more simplified construction for economical manufacturing and ease of installation and replacement of nozzle spray tips. A spray water venturi entrance passage in the body of the nozzle unit maximizes spray power and quiets turbulence. The spray tip angle is preset relative to the body of the nozzle unit and an indicator groove on the body permits exact alignment of each spray tip during assembly on a header. Deep burying of the nozzle unit in the header eliminates plugging of the nozzle entrance passage at start-up and protects the nozzle from external collision damage.

Abstract: Ambient water and steam in a predetermined ratio are delivered into the entrance of a venturi chamber in a fluid accelerator. The steam condenses and in so doing elevates the water temperature significantly. The heated water passes through a venturi throat and then has its pressure elevated considerably above the pressure of the incoming steam prior to discharging from the accelerator into valved piping leading to cleaning spray headers on opposite sides of the moving metal strip. High pressure, high temperature water cleaning sprays are directed through header nozzles onto the strip to thoroughly clean its entire surfaces. Venturi vacuum is utilized whenever desired to draw a cleaning additive into the system where such additive is entrained in the water stream. Simplicity and economy are achieved in a highly efficient cleaning system.

Abstract: Metal strip reducing rolls are precisely cooled in multiple zones across the width of the strip by the selective activity of modular valve assemblies on coolant headers mounted near the reducing rolls. Each valve module may possess one or more remotely controllable coolant control valves within the header and associated coolant nozzles whose aperture sizes may vary in a fixed ratio within each zone to achieve a variable coolant flow rate in each zone while maintaining a constant unchanging coolant spray configuration and impingement force. Individual coolant valves and nozzles in a digital control system are fully on or fully off in contrast to gradient control of coolant in an analog system. An observer of the moving metal strip activates and deactivates selected nozzles in selected zones across the strip through a push button digital control console. Electrical, pneumatic or hydraulic valve control may be utilized. Back-up rolls in the mill may also be cooled.

Abstract: To evenly cool metal strip stock emerging from a rolling mill, a series of spaced elevated manifolds receive cooling water from a controllable source and deliver water continuously across the full width of the strip stock in the form of falling solid curtains or walls of water.