PURPOSE:To increase a life of a storage battery, by filling a paste state active material added with tetrabasic lead sulfate to a base plate and then maturing the material to form a crystal of the tetrabasic lead sulfate in the active material. CONSTITUTION:In the method, in which a paste state active material is filled in a base plate and matured at high temperature and high humidity to manufactu...

PURPOSE:To improve assembly workability of a battery while decrease its weight and improve its life performance, by arranging a flat bag body consisting of an oxidation resistant resin film to the outside of an end plate of a plate group and sealing compressed gas in said bag body then pressurizing said plate group. CONSTITUTION:A plate group 4 consisting of a positive plate 1, negative plate 2 an...

An artificial grain leather sheet free of rubber-like elasticity and characterized by excellent softness and strength composed of ultrafine super-entangled synthetic fibers having a denier of less than about 0.5 and a resin. The sheet has a body portion and a grain surface portion wherein the ultrafine fibers are supertangled at a multiplicity of entangling points, with the average distance betwee...

A method and apparatus for longitudinal compressive treatment of a web (16) which employs a novel sheet-form retarding member (40). The working thereof is comprised of a sat of spaced-apart retarding ridges (46) distributed across the width of the portion of the web to be retarded. The ridges are arranged acutely to the longitudinal feeding direction (S) of the web, with initial portions disposed ...

A papermakers' fabric, having a repeating pattern of floats on its paper support surface is provided with surface floater yarns interspaced between adjacent yarns to improve sheet support characteristics of the fabric. The floater yarns are characterized by lack of interlacing with yarns transverse thereto. The floater yarns are "trapped" beneath the surface floats and are of a diameter generally ...

A process for the preparation of a highly sized paper which comprises subjecting a paper containing a sizing agent to electron radiation. A photographic support showing reduced developing solution permeation is also disclosed.