Bag making and packaging machine

A bag making and packaging machine, comprising

• a transverse sealing mechanism having a horn and an anvil that are configured to sandwich a tube-shaped film transported in a first direction between the horn and the anvil for ultrasonic sealing, and configured to transversely seal along a direction intersecting the first direction, the anvil being formed with a knife movement space;
• a knife disposed in the knife movement space formed in the anvil;
• a knife-driving part coupled to the transverse sealing mechanism and configured to drive the knife within the knife movement space such that the knife moves toward the horn when the film is transversely sealed so that a sealed bag is cut and separated from the tube-shaped film;
• and
• a guide part provided at each end of the anvil, each of the guide parts defining a respective guide space therein such that movement of the knife is guided along the guide spaces when the knife is driven by the knife-driving part,
• wherein
• each of the guide spaces has a first width measured with respect to a second direction, which is orthogonal to a movement direction of the knife driven by the knife-driving part and orthogonal to a length direction of the knife, and the knife movement space defines a second width measured with respect to the second direction, the first width being less than the second width.