Adhesive bonding and miscellaneous chemical manufacture – Differential fluid etching apparatus – With microwave gas energizing means
Patent
1992-09-08
1993-09-28
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Differential fluid etching apparatus
With microwave gas energizing means
156644, 134122R, 204194, B44C 122, C23F 100
Patent
active
052483720
ABSTRACT:
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.
REFERENCES:
patent: 3066084 (1962-11-01), Osterman et al.
patent: 4920995 (1990-05-01), Seiz et al.
patent: 5116447 (1992-05-01), Kimura et al.
Powell William A.
Production Machinery Corporation
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