an ultrasonically bonded fabric package for a vaporizable anti - static softening bar to be employed in an automatic dryer . to fabricate the package the bar is placed on a sheet of fabric consisting of approximately 60 to 70 % dacron and 30 to 40 % cotton and the sheet is folded over to enclose the bar . the three open sides of the folded fabric are bonded together by applying pressure to the side edges in an amount of 20 to 40 psi , while subjecting the fabric to ultrasonic vibrations . a thermoplastic velcro hook strip is bonded to the outer surface of the fabric envelope . the hook strip is adapted to engage a velcro loop strip secured to the internal surface of the automatic dryer .