Provided is an ultrasonic sealing apparatus that forms a plurality of welded sections at intervals along a transport direction of a continuous web by applying an ultrasonic vibration to the continuous web while the continuous web is being transported along a predetermined linear track, the continuous web being related to an absorbent article. The apparatus includes an ultrasonic horn that emits the ultrasonic vibration an anvil that cooperates with the ultrasonic horn so as to nip the continuous web in a thickness direction thereof while the ultrasonic horn is emitting the ultrasonic vibration towards the continuous web and a reciprocating linear motion mechanism that moves the ultrasonic horn and the anvil along a forward path and a backward path which are parallel to the linear track. The forward path has an equal speed region in which the ultrasonic horn and the anvil oppose each other in the thickness direction and move at a speed value which is the same as a transport speed value of the continuous web. The ultrasonic horn and the anvil perform a nipping and a releasing of the nipping of the continuous web while moving in the equal speed region. The ultrasonic horn emits the ultrasonic vibration during the nipping of the continuous web.本發明為:在「吸收性物品的連續帶狀物被搬送於特定的直線軌道」的期間,藉由對連續帶狀物施加超音波振動,而在連續帶狀物的搬送方向上保持間隔地形成複數個融著部的超音波密封裝置。本發明具有「發出超音波振動」的超音波錐、和「當超音波錐朝向連續帶狀物發出超音波振動時,與超音波錐從連續帶狀物的厚度方向挾持連續帶狀物」的砧座、及「促使超音波錐與砧座,沿著與前述直線軌道平行的前進路徑及後退路徑移動」的往復直線移動機構。在前進路徑設有:超音波錐與砧座雙方互相在前述厚度方向上形成相對向,並且以與「連續帶狀物之搬送速度值」相同的速度值形成移動的等速區域。在移動於前述等速區域的期間,超音波錐與砧座執行連續帶狀物的挾持、及前述挾持的解除。在連續帶狀物的挾持期間,超音波錐發出超音波振動。1a‧‧‧連續帶狀物19‧‧‧鏡板19a‧‧‧垂直面20‧‧‧超音波密封裝置30‧‧‧超音波錐30U‧‧‧超音波錐單元32‧‧‧地板40‧‧‧導引構件40AN‧‧‧導引構件(線性導件)42‧‧‧軌道42AN‧‧‧軌道44‧‧‧滑動件44AN‧‧‧滑動件46‧‧‧支承台50‧‧‧前後方向驅動機構50AN‧‧‧前後方向驅動機構52‧‧‧馬達52AN‧‧‧伺服馬達52a‧‧‧驅動旋轉軸52aAN‧‧‧驅動旋轉軸55‧‧‧軸接頭55AN‧‧‧軸接頭56‧‧‧進給螺桿機構56AN‧‧‧滾珠螺桿機構57‧‧‧螺桿57AN‧‧‧螺桿58‧‧‧螺帽構件58AN‧‧‧螺帽構件59‧‧‧軸承構件59AN‧‧‧軸承構件60‧‧‧砧座60U‧‧‧砧座單元62‧‧‧頂板70‧‧‧上下方向往復移動機構74‧‧‧氣墊80‧‧‧控制器90‧‧‧搬送裝置Pb‧‧‧後退極限Pf‧‧‧前進極限Tr1a‧‧‧直線軌道V1a‧‧‧特定的搬送速度
