A PROCESS FOR PACKAGING A PRODUCT IN A SEALED WRAPPER OF SHEET MATERIAL

摘要

Process and corresponding apparatus for wrapping a product (P) in a wrapper of sheet material, adhering to the surface of the product, the process comprising the steps of: providing a first (2) and a second sheet (4) of wrapping material, shaping said first sheet (2) according to a cup-shaped configuration comprising a bottom portion (2a) substantially complementary to a bottom portion of the surface of the product, a tubular portion (2b) which extends above the top of the product when inserted in said so-shaped sheet and defining a mouth adapted for the introduction of the product and an annular flange terminal portion (2c) surrounding said mouth, introducing the product (P) in said first shaped sheet (2), and connecting said second sheet (4) to said annular flange (2c) so as to form a closed wrapper around said product. Following the introduction of the product and prior to connection of said second sheet (4) with said annular flange, it includes the operation to make a bottleneck of said tubular portion (2b) of said first sheet (2) in its region (2d) immediately above the top of the product, exerting on said annular flange (2c) a pressure suitable to bind the edges of flange (2c) or to limit its radial movement, so as to cause the adhesion of said tubular wall (2b) to a substantial portion of the top surface of the product.