Patent ID: 6645330
Filing Date: 2003-11-11
Classification: A61F,B29C,B29L,Y10T

Abstract:
A method of forming an image on a moving non-woven web comprisingfeeding a moving non-woven web past an ultrasonic assembly; imparting sufficient ultrasonic energy to the moving web with the ultrasonic assembly to raise the surface temperature of the moving web to slightly above the melting temperature of the moving web only in the areas where the image is to be formed for a positive image, or only in the areas where the image is not to be formed for a negative image, to thereby form the image, whereby imparting sufficient ultrasonic energy includes vibrating the ultrasonic assembly transversely to the direction of the moving web such that the ultrasonic assembly only briefly comes into contact with the moving web that is imaged when the horn is fully extended, and the amount of energy imparted by the ultrasonic assembly is controlled to prevent forming a hole in the moving web.