Document Type and Number:
Japanese Patent JPS618546
Kind Code:
B2
Abstract:
PURPOSE:To absorb feed irregularity when expanding a thin sheet of lead or lead alloy to make a lattice like a net, by making the length of the parallel part of the tip of a cutter not less than that of the node of the wire of the lattice. CONSTITUTION:The tip of a cutter 1 is provided with a relatively-long parallel part (a), the length of which is equal to the sum of the length of a node 6 and a feed length irregularity. When the length of the node 6 is 3mm. and the feed length irregularity is 2mm., the length of the parallel part (a) is 7mm.. When a reticulate lattice (m) is formed, the node 6 is made 3mm. long and a bent part 7 is made 7mm. long. Although the feed length fluctuates in the range of 2mm., stress concentration is avoided because the ends of th bent part 7 and the node 6 are located in coincident positions. Since deformation is not caused, the total height (b) of the reticulate lattice (m) is kept constant.
Inventors:
JITSUKATA AKIO
HAMADA OSAMU
HAMADA OSAMU
Application Number:
JP4983082A
Publication Date:
March 14, 1986
Filing Date:
March 26, 1982
Export Citation:
Assignee:
YUASA BATTERY CO LTD
International Classes:
B21D31/04; H01M4/74; H01M4/82
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