PAPER PALLET OF DEEP EXTRACT, METHOD AND DEVICE (VERSIONS) FOR MANUFACTURE OF SUCH PALLET AND PRODUCT PACKAGING WITH SUCH PALLET Russian patent published in 2017 - IPC B65D1/26 

FIELD: packaging industry.

SUBSTANCE: invention relates to a deep-drawing method for a paper tray (4), in particular a shallow pallet made from cardboard or heavy paper, to a method and apparatus for making such a tray by deep drawing technology and to a closed food package containing a tray in accordance with the invention, In particular to a sealed heat-sealing food package, impermeable to gas and liquid. The pallet comprises a bottom (4a) and expandable side walls around the bottom. The side walls of the pallet are formed with expansion by several surrounding steps (4b, 4c, 4d), sufficiently low so that the sidewalls of the pallet do not have wrinkles. The outer step is a flat and wrinkle-free edge (4d), which makes it possible to create a package by fastening the cover with heat-sealing, ensuring liquid and gas impermeability. The device according to the invention can comprise upper and lower forming tools (10, 11) with concentric movable frames (10b, 10c, 10d) for moulding the bottom of the pallet and steps of the side walls from the paper blanks. Forming tools (10) can be mounted on a pivoting device (9) carrying a paper blank through workstations located along the perimeter of the pivoting device to shape the bottom of the pallet and the steps of the sidewalls at the successive stations.

EFFECT: improvement of the manufacturing method, and increasing the reliability of the packaging.

17 cl, 9 dwg