| 摘要 |
PURPOSE:To decrease the part cut off as an unnecessary waste, by setting the length of the part for expanding work including the upper frame and lower one of a lattice, same to the length of the jut part of the lattice which is extended on the upper frame. CONSTITUTION:The outer side of a jut part 3 is set in alignment with the side part of a lattice 2, as an lattice unit, on the thin beltlike plate 1 of lead or lead alloy having the total width of that of the lattice 2 and a jut part 3. The length L of the thin plate for expanding work including an upper frame 5 and lower one 5', is set to the same length as L' of the jut part 3. The adjacent upper frame 5 and lower framr 5' of the lattice is stretched lengthwise along the thin beltlike plate 1 in the state of an integrated body, and the jut part 3 is set on the both sides of the thin beltlike plate 1, being arranged alternately on right and left. |
