Ultrasonic wave splicing device

An apparatus for splicing a trailing edge of a first web currently used for a web product with a leading edge of a second web to be used after the first web, comprising:

• a fixing device for superimposing the second web on or beneath the first web and for fixing the superimposed condition of the first and second webs;
• a cutting device for cutting the first and second web simultaneously on the superimposed condition so as to form a trailing edge of the first web and a leading edge of the second web;
• means for overlapping the leading edge of the second web on or beneath the trailing edge of the first web so as to form a overlapped section with a predetermined overlapped width;
• and
• a ultrasonic welder for welding the overlapped section so as to form a joint section at which the trailing edge of the first web is spliced with the leading edge of the second web.