A spouted pouch provided with a closure device

A spouted pouch comprising:

• a flexible material pouch body (1),
• a spout (10) having a spout body with at a lower end thereof an attachment portion (11) that is attached to the pouch body, wherein said spout body has at an upper end thereof a tubular neck (12), which neck has an interior surface delimiting at least a section of a product passage (13) that extends from a lower product passage opening through the spout body to an upper opening (15) at a top end of the neck, said neck having an exterior surface provided with a first screw thread (21),
• wherein the spout body is provided with a rotation preventing boss (25,26) at a location outward of the neck and below said first screw thread (21),
• a closure device (40) that is secured on said neck (12) of the spout, wherein said closure device comprises:
• a socket (50;
• 150) configured to the screwed onto the neck of the spout,
• a user openable hinged cap (70;
• 170) supported on the socket in a manner so as to be openable or removable relative to the socket,
• wherein the socket (50;
• 150) comprises a molded socket body of plastic material, which socket body has a tubular body portion (58) defining a bore (52) extending through the socket body from a lower end of the socket body to a discharge opening (54) at a top end of the tubular body portion, wherein the bore (52) receives at least a portion of the neck (12) of the spout therein, wherein the bore has an interior surface provided with a second screw thread (56) that cooperates with the first screw thread (21) and wherein the socket body has a deck portion (57) forming a deck surface about the tubular body portion (58),
• wherein a lower section (58b) of the tubular body portion (58) extends below the deck portion, wherein the second screw thread (56) is provided in said lower section (58b) of the tubular body portion, and wherein an upper section (58a) of the tubular body portion extends above the deck surface and defines a discharge portion (53) having said discharge opening,
• wherein the socket body is provided at the lower end thereof with a permanent snap lock anti-back off structure (60) comprising at least one permanent snap lock anti-back off portion (61, 62;
• 161, 162) that has been flexed over the rotation preventing boss (25,26) upon screwing of the socket (50;
• 150) onto the neck of the spout and then snapped behind said rotation preventing boss, wherein said permanent snap lock anti-back off structure is configured to remain intact upon a user opening the cap (70;
• 170) for the first time,
• wherein the hinged cap (70;
• 170) is hinged to the deck portion and, in a closed position thereof, covers the discharge portion (53).