| 摘要 |
PROBLEM TO BE SOLVED: To keep the distance between sealing members constant at a preset measurement without regard to tolerances at every part of shaft bodies and bearing bodies by a method wherein devices for separating shaft bodies of heat sealer shafts from each other are provided at both sides of each of the shaft bodies or a position near each of sealing devices. SOLUTION: At both ends of shaft bodies 5 and 5a of a pair of heat sealer shafts 4 and 4a that are arranged in parallel with each other and driven in revolutions in the opposite direction, second bearing bodies 11 and 11a constantly urging the shaft bodies 5 and 5a of the heat sealer shafts 4 and 4a in the directions separating from each other through a plurality of coned disc springs 16 piled up in the vertical direction and housed in the apparatus are provided. Therefore, the distance between each of sealing members 3 and 3a can be kept constant at a preset measurement without regard to tolerances at every part of the shaft bodies 5 and 5a and bearing bodies 7 and 7a even though the sealing members 3 and 3a on the heat sealer shafts 4 and 4a are placed face to face at the nearest positions by the revolution of the shafts when sealing is applied to a matter to be sealed. |
