Abstract: A method of operating a machine for producing sealed packages for a product, comprises the step of changing the configuration of the machine so that the machine, which was producing a package (2) having a first conformation, becomes capable of producing a package (102) having a second conformation. The first conformation is different from the second conformation. The package (2) having the first conformation is produced from a first sheet packaging material (1) comprising a first basic unit (3) having a length (L) and a width (W), the package (102) having the second conformation being produced from a second sheet packaging material (101) comprising a second basic unit (103) having a length (L) and a width (W) respectively equal to the length (L) and width (W) of the first basic unit (3).

Abstract: An opening device for a container comprises a pouring spout defining a pouring opening to pour in use the content of the container, a closing element closing the pouring opening and connected to the pouring spout by a breakable connection, and a closure fitted to the pouring spout in a removable manner to close the pouring opening at a region thereof different from that closed by the closing element; the closing element is formed in one piece with a protruding portion extending through the pouring opening and welded to the closure far away from the closing element.

Abstract: An opening device for a container includes a pouring spout defining a pouring opening to pour in use the content of the container, a closing element closing the pouring opening and connected to the pouring spout by breakable connector, and a closure fitted to the pouring spout in a removable manner to close the pouring opening at a region thereof different from that closed by the closing element; the closing element is formed in one piece with a protruding portion extending through the pouring opening and welded to the closure far away from the closing element.

Abstract: There is described an opening device for a container, which comprises a pouring spout defining a pouring opening to pour in use the content of the container, a closing element closing the pouring opening and connected to the pouring spout by breakable connector, and a closure fitted to the pouring spout in a removable manner to close the pouring opening at a region thereof different from that closed by the closing element; the closing element is formed in one piece with a protruding portion extending through the pouring opening and welded to the closure far away from the closing element.

Abstract: There is described a sealed package for pourable food product, comprising: a first wall, which is adapted to define, in a normal use position, a bottom wall of package, and which comprises a plurality of boundary first edges defining a first plane; a second wall, which is opposite to first wall, comprises a second edge and a third edge opposite to each other, and is adapted to define, in the normal use position, a top wall of package; second edge and third edge define a second plane, which is angled with respect to first plane for a first angle smaller than 90 degrees; the first angle ranges between 1 and 7 degrees.

Abstract: There is described a spout for opening devices of sealed packages of pourable food products. The spout has an annular flange fixable to a respective package, and a tubular neck portion projecting from the flange and defining, with the flange, a through opening through which to pour the food product; and the spout also has, at least at a section crosswise to the axis of the opening a constriction constricting flow of the pourable food product.

Abstract: An apparatus for injection molding an opening device on a sheet packaging material having a hole possessing an axis, formed through a first layer and sealed by a cover portion of a second layer; comprises a mold cavity coaxially housing the cover portion and comprising a first chamber adapted to be filled with molten plastic material on a first side of the cover portion, and a second tubular chamber projecting along the axis from the first chamber and adapted to be filled with the molten plastic material coming from the first chamber through an annular peripheral portion of the cover portion to form, on a second side of the cover portion, a spout; an annular rib delimiting a passage connecting the first and second chamber and defining, when filled with the plastic material, an annular tearable membrane connection portion between the spout and the plastic material covering the cover portion.

Abstract: An apparatus for injection molding an opening device on a sheet packaging material having a hole possessing an axis, formed through a first layer and sealed by a cover portion of a second layer; comprises a mold cavity coaxially housing the cover portion and comprising a first chamber adapted to be filled with molten plastic material on a first side of the cover portion, and a second tubular chamber projecting along the axis from the first chamber and adapted to be filled with the molten plastic material coming from the first chamber through an annular peripheral portion of the cover portion to form, on a second side of the cover portion, a spout; an annular rib delimiting a passage connecting the first and second chamber and defining, when filled with the plastic material, an annular tearable membrane connection portion between the spout and the plastic material covering the cover portion.

Abstract: There is described a spout for opening devices of sealed packages of pourable food products. The spout has an annular flange fixable to a respective package, and a tubular neck portion projecting from the flange and defining, with the flange, a through opening through which to pour the food product; and the spout also has, at least at a section crosswise to the axis of the opening a constriction constricting flow of the pourable food product.