초록 ▼

An ultrasonic seaming method and apparatus for continuously bonding thermoplastic material are disclosed. A movable anvil is disposed opposite the output end of a horn for providing a gap through which the thermoplastic material is conveyed. The anvil cyclically is moved away from the face of the ho

An ultrasonic seaming method and apparatus for continuously bonding thermoplastic material are disclosed. A movable anvil is disposed opposite the output end of a horn for providing a gap through which the thermoplastic material is conveyed. The anvil cyclically is moved away from the face of the horn and immediately thereafter is urged under slight adjustable pressure against the underside of the material and then is clamped in position for a predetermined period of time or an amount of material feed.

대표청구항 ▼

An ultrasonic seaming apparatus comprising: an electroacoustic converter adapted to provide mechanical high frequency vibrations in response to applied electrical energy; a horn coupled to said converter for receiving at an input end thereof said vibrations and providing at an opposite output end sa

An ultrasonic seaming apparatus comprising: an electroacoustic converter adapted to provide mechanical high frequency vibrations in response to applied electrical energy; a horn coupled to said converter for receiving at an input end thereof said vibrations and providing at an opposite output end said vibrations to material in contact with said horn; movable anvil means disposed opposite said output end of said horn for providing with said horn a nip through which thermoplastic material to be seamed is conveyed and seamed responsive to the transfer of ultrasonic energy from said output end to the material while the material is in forced contact with said horn; force means coupled to said anvil means for urging said anvil means into motion toward contact with said output end of said horn; motive means coupled to said anvil means for causing when actuated motion of said anvil means in a direction opposite to that urged by said force means; clamping means disposed for clamping said anvil means in fixed position relative to said output end to maintain a predetermined gap between said output end and said anvil means responsive to the position of said output end, the force exerted by said force means, and the thickness of material disposed in said nip, and control means coupled to said motive means and said clamping means for cyclically actuating said motive means and said clamping means whereby to cylically reset said gap and maintaining said reset gap for a predetermined duration.