Patent ID: 8662133
Filing Date: 2014-03-04
Classification: A61F,B29C,B29L,G01N,Y10T

Abstract:
1. An ultrasonic processing apparatus comprising an ultrasonic processing unit for subjecting a fibrous web to ultrasonic processing by interposing the fibrous web between a horn connected with an ultrasonic oscillator and an anvil opposed to the horn, wherein: the ultrasonic processing apparatus includes upstream side conveying means and downstream side conveying means allowing the fibrous web to run in a machine direction continuously, between the upstream side conveying means and the downstream side conveying means, the ultrasonic processing unit including a first mechanical element defined by one of the horn and the anvil and a second mechanical element defined by a remainder is located in a face to face relation so that the fibrous web is nipped therebetween, the first mechanical element is a stationary element in the ultrasonic processing apparatus being movable neither in the machine direction nor in a cross direction with respect to the machine direction and having a working surface opposed to the second element, and the second mechanical element is a movable element adapted to rotate in the cross direction and at the same time to repeat back-and-forth movement between the machine direction and the cross direction across the fibrous web wherein, in the course of moving forward, the movable element is kept in contact with the fibrous web running in the machine direction and cooperates with the working surface of the first mechanical element to subject the fibrous web to the ultrasonic processing and, in the course of moving back, the movable element is spaced away from the fibrous web.