KIT Russian patent published in 2021 - IPC A45F3/04 

FIELD: kits.

SUBSTANCE: kit contains a body, a flap and a pair of shoulder straps. The body contains a rear panel (11) and an insert (12) attached to the outer edge (11a) of the rear panel (11). The insert (12) contains: an outer layer (12a); a spacer (12b) located inside the outer layer (12a) and having a higher flexural rigidity than the outer layer (12a); and an inner spacer (12c) located inside the spacer (12b) having a higher flexural rigidity than the outer layer (12a). One of the spacers (12b) and the inner spacer (12c) comprises a body (P1) and a projection (P2) protruding from the body (P1) in a direction away from the outer layer (12a). The body (P1) and the projection (P2) are supported by the rear panel (11).

EFFECT: kit improvement.

3 cl, 15 dwg