Abstract: Cartons for packaging and mailing books and the like include parallel major and minor walls which are foldably interconnected to form a tubular structure and a closure and protecting structure for each end of the tubular structure including end flaps which are folded to form triangularly shaped air cushions, and, in a modification, a trapezoidally shaped air cushion. The end flaps are provided with locking tabs which engage corresponding notches in the top surface of one of the major walls in order to form the air cushions.

Abstract: A sealed carton containing lading assembled from a pair of cooperating sheet members comprising a body blank and a cover sheet. The body blank comprises a generally U-shaped formation formed from paperboard or like relatively rigid but foldable material. The cover member is formed from a continuous rectangular sheet member of lightweight, highly flexible material which is substantially thinner than the body blank materail. The body blank has a plurality of hingedly connected flanges folded to positions normal to the panels thereof and the sheet member is folded into a complementary U-formation and matingly engaged over the body blank with marginal edges of the sheet member adhesively secured to said flanges to form the sealed carton around the lading.

Abstract: Cartons for packaging and mailing books and the like include parallel major and minor walls which are foldably interconnected to form a tubular structure and a closure and protecting structure for each end of the tubular structure including end flaps which are folded to form triangularly shaped air cushions, and, in a modification, a trapezoidally shaped air cushion. The end flaps are provided with locking tabs which engage corresponding notches in the top surface of one of the major walls in order to form the air cushions.