B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
B65D5/42—Details of containers or of foldable or erectable container blanks
B65D5/44—Integral, inserted or attached portions forming internal or external fittings
B65D5/50—Internal supporting or protecting elements for contents
B65D5/5028—Elements formed separately from the container body
B65D5/5035—Paper elements
B65D5/5038—Tray-like elements formed by folding a blank and presenting openings or recesses