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US 5,248,372 AGranted
Apparatus for pickling a metal sheet material
AssigneeProduction Machinery Corporation
InventorDonald C. McNamee
Life of this patent
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AssigneeProduction Machinery Corporation
InventorDonald C. McNamee
Estimating the term…
Apparatus for pickling metal sheet as it moves along a generally flat horizontal path, comprises elongated shallow and sequentially arranged electrolytic pickling and mixed acid pickling tanks each having input and output ends and through which metal sheet to be pickled is continuously fed along a linear, flat path through the use of support rolls underlying the metal sheet at spaced locations between the input and output ends of the tanks. Pickling liquid is maintained in each of the tanks at a given level above the support rolls, whereby the sheet material is immersed in the pickling liquid between the input and output ends of the corresponding tank. Each tank has guide rolls at the input and output ends thereof for guiding the sheet material therethrough, and the support rolls are driven at the speed of the sheet material to minimize the tension on the sheet as it is being pickled. Seal arrangements are provided for sealing the rolls relative to the tanks where the sealing means includes two axially spaced rings with extending lips on each end of the driven rolls and two low friction plates mounted on the tank and engageable by a lip of a sealing ring as the two rings rotate with a roll. Arrangements are provided for recirculating the pickling liquid, and a displaceable cover arrangement is provided for the pickling tanks.
Apparatus for pickling metal sheet moving along a generally flat horizontal path, said apparatus comprising a shallow tank means having input and output ends and adapted to contain a liquid, guiding roll means at each said input and output ends for guiding said sheet through said tank means, said sheet being immersed slightly in said liquid in said tank means between said input and output ends;
Apparatus for treating metal sheet with a cleaning chemical liquid, said apparatus comprising tank means having input and output ends and adapted to contain liquid, guide roll means at each said input and output ends for guiding metal sheet through said tank means in a generally horizontal path, said metal sheet being immersed in said liquid in said tank means between said input and output ends, support roll means in said tank means beneath and supporting said metal sheet for movement through said tank means along said path between said input and output ends, means to drive said guide roll means to feed said metal sheet through said tank means along said path at a given speed, means to drive said support roll means at a speed corresponding to said given speed, said tank means having opposite side wall means between said input and output ends, each said guide roll means and support roll means having opposite end means in the direction between said side wall means, seal means on each of said opposite end means for sealingly engaging the corresponding one of said side wall means, means adjacent at least one of said input and output ends of said tank means for maintaining said liquid at a predetermined level in said tank means, and recirculating means including heat exchanger means for recirculating and maintaining liquid at a predetermined temperature in said tank means.
Dependencies are inferred from the claim text.