| 主权项 |
1. A welding assembly for welding at least one foil, comprising:
a holding means for holding the foil while welding, the holding means comprising an upper jaw and a lower jaw, wherein the upper jaw and lower jaw are configured to be moved up and down and to hold the foil during welding; a welding means for welding the foil, the welding means comprising a welding beam and a welding support, wherein:
the welding means are placed inside the holding means,the welding support is configured to be moved vertically up and down independently of the lower jaw,the welding beam is configured to be moved vertically up and down independently of the upper jaw,the welding support and welding beam are configured to be moved vertically up and down as a single unit, relative to the holding means, while holding the foil;an accumulation means for accumulating an excess un-stretched part of said foil between at least one welding point of said welding means and at least one holding point of said holding means, such that the length of the foil between the at least one holding point and the at least one welding point is longer than the distance between the at least one holding point and the at least one welding point, wherein said accumulation of foil is obtained by clamping the foil at the at least one welding point and at the at least one holding point at a vertical distance from each other and then moving the at least one welding point and the at least one holding point vertically a variable distance towards each other to a point located between the starting point and the ending point, allowing a variable amount of accumulated foil is to be placed in a space between the holding point and the welding point; and a cutting means for cutting the foil, the cutting means being moveable independently of the holding means and the welding means. |
