Patent ID: 8241435
Filing Date: 2012-08-14
Classification: B08B,H01M,Y02E

Abstract:
1. A washing apparatus for washing off a metal impurity from a porous metal substrate for use as an electrode plate core for an alkaline battery, the washing apparatus comprising: a liquid bath container which holds a solution for washing off the metal impurity, wherein the solution contains ammonium ions and hydrogen peroxide; a guide which guides movement of the porous metal substrate in the solution held in the liquid bath container, the porous metal substrate being wound into a hoop in a coil-shaped manner, and the guide guiding the movement of a sheet portion of the porous metal substrate unwound from the hoop, wherein the guide includes first and second pulleys over which the sheet portion is sequentially fed up and down in an alternate manner to move the sheet portion back and forth a plurality of times in the solution of the liquid bath container so as to agitate the solution, wherein the first pulley is located at a lower portion of the liquid bath container in the solution, and the second pulley is located at an upper portion of the liquid bath container in the solution; a spraying unit for washing off the solution from the sheet portion; a drying unit for drying the sheet portion after the solution is washed off from the sheet portion; and a winding mechanism which winds the sheet portion that has been fed through the liquid bath container.