School book back satchel

Claim 1

A school book back carried satchel comprising: a substantially light weight plastic back wall shell including integral sidewalls extending continuously about the periphery of the back wall and defining with the back wall a rectangular bag back pocket facing outwardly on one side of said back wall, said shell being curved concavely in a transverse direction on the other side of said shell back wall, opposite said pocket, to fit the body of the user, at least one bag member of a soft pliable light weight material, and means for mounting said at least one bag member to said one side and partially within said bag back pocket to protect said soft, pliable light weight material bag and its contents about the edges of said bag, said plastic shell further comprising a vertical, central groove extending over the entire vertical height of the plastic shell on the other side of the back wall to accomodate the full lumbar contour of the user and to define a vertical ventilation path between the user and the shell extending the full vertical height of said shell, and a groove extending transversely over the entire width of said plastic shell and intersecting said vertical, central groove to affect transverse ventilation air flow between the back of the user and said plastic shell, and wherein said shell sidewalls terminate in flanged edges and said satchel further comprises a rigid molded plastic bottom member having complementary flange edges to that of said shell and being fixedly coupled to said shell at the lower end thereof on the side facing away from the back of the user by way of said complementary flanges, and wherein said rigid molded plastic bottom member includes laterally spaced, upwardly extending side projecton portions to define with said shell sidewalls an enlarged bottom pocket acting in conjunction with the back pocket of said shell for receiving and further protecting the bag member and its contents.