US 11,987,427 B2
Packaging box and sheet material
Tomoaki Arai, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Tomoaki Arai, Kanagawa (JP)
Filed on Mar. 8, 2022, as Appl. No. 17/689,111.
Claims priority of application No. 2021-045713 (JP), filed on Mar. 19, 2021.
Prior Publication US 2022/0297874 A1, Sep. 22, 2022
Int. Cl. B65D 5/20 (2006.01); B65D 5/02 (2006.01); B65D 5/22 (2006.01)
CPC B65D 5/2057 (2013.01) [B65D 5/0254 (2013.01); B65D 5/22 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A packaging box comprising:
a first pair of side plates facing each other;
a second pair of side plates facing each other;
an upper plate to close an upper opening of the packaging box;
a bottom plate to close a lower opening of the packaging box;
a folded inward contact flap connected to a lateral side of one of the first pair of side plates and folded at the lateral side to be in contact with one of the second pair of side plates; and
a holding mechanism holding contact between the folded inward contact flap and the one of the second pair of side plates,
wherein the upper plate is configured to open and close the upper opening, and
wherein the other one of the first pair of side plates covers an end of the folded inward contact flap and is configured as a lateral lid flap to open and close a lateral opening of the packaging box.