US 12,351,352 B2
Belt-type vacuum packaging machine
Massimiliano Magnabosco, Torrebelvicino (IT); and Sileo Vendraminetto, San Donà di Piave (IT)
Assigned to BMB S.R.L., Malo (IT)
Appl. No. 18/285,283
Filed by BMB S.R.L., Malo (IT)
PCT Filed Mar. 28, 2022, PCT No. PCT/IB2022/052833
§ 371(c)(1), (2) Date Oct. 2, 2023,
PCT Pub. No. WO2022/208311, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 102021000008252 (IT), filed on Apr. 1, 2021.
Prior Publication US 2024/0182195 A1, Jun. 6, 2024
Int. Cl. B65B 31/02 (2006.01); B65B 31/04 (2006.01); B65B 31/06 (2006.01); B65B 51/14 (2006.01)
CPC B65B 31/024 (2013.01) [B65B 31/043 (2013.01); B65B 51/146 (2013.01)] 16 Claims
OG exemplary drawing
 
1. Belt-type vacuum packaging machine for packaging products contained in preformed bags, comprising:
a base frame-which supports a work surface which mainly develops along a longitudinal direction;
a conveyor belt system comprising a conveyor belt which extends along said longitudinal direction above said work surface and is configured to transfer products contained in preformed bags from a loading area to a packaging area;
a packaging chamber arranged in said packaging area above said work surface and said conveyor belt;
displacement actuator system coupled to displace said packaging chamber with respect to said work surface and said conveyor belt;
a vacuum chamber configured to receive said products contained in said bags to be vacuum packed, said vacuum chamber being defined between the inside of said packaging chamber and an upper surface of said conveyor belt when a perimetric edge of said packaging chamber is arranged in contact with said work surface and said conveyor belt;
at least one vacuum production system that communicates with said vacuum chamber;
a welding system configured to weld said preformed bags adapted to be operated after vacuum packaging;
at least one injection system of at least one gaseous substance into each of said preformed bags after said vacuum production system has created the vacuum in each of said preformed bags, said injection system comprising a plurality of injector nozzles that are configured to be connected to said preformed bags and be turned towards the inside of said preformed bags when said preformed bags are arranged on said conveyor belt,
characterized in that each of said injector nozzles is connected to said conveyor belt and is fixed in a through hole made in said conveyor belt;
wherein said welding system is arranged at said packaging area and include a pair of welding bars fixed to said work surface and a pair of welding counter-bars, each opposed to a respective welding bar, fixed inside said packaging chamber and protruding from a canopy of said packaging chamber, said welding bars and said welding counter-bars being symmetrically arranged with respect to said longitudinal direction defined by said conveyor belt and aligned along said straight alignment directions of a plurality slits;
wherein each of said welding bars and each of said welding counter-bars opposite to each other are configured to mutually come into contact by passing through a respective one of said slits and weld each of said preformed bags in between them when: said packaging chamber is lowered and defines said vacuum chamber that contains said welding bar, said welding counter-bar and said injector nozzles; each of said welding bars and each of said welding counter-bars opposite to each other are arranged to coincide with a respective one of said slits, wherein one of said welding bars is below and one of said welding counter-bars is above a corresponding one of said slits, and wherein each of said welding bars is configured for movement mutually against each of said welding counter-bars through a corresponding one of said slits.