Sonic valve closure assembly for valve bags

A valve bag assembly comprising:

• a tubular bag body having a valve end including a valve side, an interior portion and an exterior surface;
• and
• a valve having:
• a valve tube having an inner opening, an outer opening, an interior surface and an exterior surface, said valve tube disposed at said valve side of said valve end of said tubular bag body, the inner opening extending into the interior portion of said tubular bag body and the outer opening extending outward of the exterior surface of said tubular valve bag, said valve tube providing a channel into the interior portion of said valve bag for filling the bag and the valve tube being substantially gas-impermeable during bag filling;
• and
• a flap valve member having an inner edge, an outer edge, and two side edges, said outer edge formed by folding a portion of said flap valve member onto itself, said flap valve member disposed at said valve side of the tubular bag body between said tubular bag body and the exterior surface of said valve tube, the inner edge of said flap valve member extending past the inner opening of said valve tube, and the two side edges each integrally joined to folded-over tab locks, said tab locks being folded over side margins of the exterior surface of the valve tube creating a seal around said inner opening of the valve tube for preventing outward channeling of product from the bag when being filled.