Method for forming disposable diapers

Abstract

Abstract A method for inserting a leak-preventing barrier of thin impervious material between the fluid pervious cover sheet and the absorbent core of a disposable diaper is disclosed. The barrier, which preferably comprises a narrow strip of thin plastic film affixed between the cover sheet and the backing sheet along a transverse heat seal line at each end of the diaper, is first drawn from a continuous supply roll and cut into lengths twice as long as desired. Each cut length is then placed across the ends of two adjacent core pads moving along a conveyor path in end-to-end relation prior to applying a continuous cover sheet over the pads. When the material between pads is heat sealed and cut transversely to form the individual diapers, the strip is also cut in half so that one half forms the barrier for the rear end of the leading diaper, while the other half forms the barrier for the front end of the next following diaper. In its preferred form the barrier supply, cutting and placing apparatus includes a pair of vacuum rolls with valving driven in timed relation to movement of the core pads. Also disclosed is a method and apparatus for preliminarily applying limited quantities of perfume to discrete locations on the core pads before application of the barrier strip such that the perfumed portion of the pad is sandwiched between the impervious backing sheet and the impervious barrier strip.

Inventors

• 👤 Richard H Frick

Bibliographic Details