The bag making mechanism bag process typically has several primary functions including material feeding, sealing, cutting, and pockets.

In the feeding section, the roll-fed flexible packaging film is unwound through a feed roller. The feed roller is used to move the film within the machine to perform the desired operation. Feeding is typically an intermittent operation, and other operations such as sealing, cutting, etc. are performed during the feed stop. The dancing roller is used to maintain a constant tension on the film roll. In order to maintain tension and critical feed accuracy, feeders and dancer rolls are necessary.

At the sealing portion, the temperature controlled sealing element is moved to contact the film for a specific length of time to properly seal the material. The sealing temperature and sealing duration vary by material type and must be constant at different machine speeds. The seal component configuration and the machine format associated therewith depend on the type of seal specified by the bag design. In most machine operating modes, the sealing process is accompanied by a cutting process, both of which are performed at the completion of the feed.

During cutting and pocket operations, operations such as sealing are typically performed during the non-feed cycle of the machine. Similar to the sealing process, the cutting and pocket operations also determine the machine form. In addition to these basic functions, the execution of additional operations such as zippers, perforated bags, tote bags, tamper-evident seals, spouts, crown treatments, etc., may depend on the design of the package. Attachments attached to the base machine are responsible for performing such additional operations.