Patent ID: 7059103

Claim:
A sealing apparatus comprising: a sealing mechanisn, having a first clamping member and a second clamping member for clamping a fusion-bondable soft work therebetween to form sealed portions in said soft work; and driving means for driving a support member to make said second clamping member alternate between a clamping position closer to said first clamping member and a refracted position away from said first clamping member, wherein said second clamping member is supported on an elastic member provided in said support member, said elastic member having a deformable casing into which fluid is introduced, so that said second clamping member in said clamping position is biased toward said first clamping member by said elastic member while being allowed to tilt in accordance with a variation of thickness of said soft work wherein said support member has frame portions whose inner surfaces face said elastic member, wherein when said second clamping member is in said retracted position, said elastic member is restricted by said inner surfaces of said frame portions, whereas when said second clamping member is in said clamping position, said elastic member is free from said inner surfaces of said frame portions.