A continuous bag-making and packaging apparatus is disclosed. In the apparatus, sealing is performed on a film at a predetermined position to make a bag while the film is continuously conveyed. The apparatus includes a film-conveying unit configured to change a feeding speed of the film, a printing unit configured to print on the film conveyed, a bag information acquisition unit configured to acquire information of a bag to be made, and a print timing presentation unit configured to present information pertaining to a print timing suitable for printing based on the information of the bag.

A continuous bag-making and packaging apparatus is disclosed. In the apparatus, sealing is performed on a film at a predetermined position to make a bag while the film is continuously conveyed. The apparatus includes a film-conveying unit configured to change a feeding speed of the film, a printing unit configured to print on the film conveyed, a bag information acquisition unit configured to acquire information of a bag to be made, and a print timing presentation unit configured to present information pertaining to a print timing suitable for printing based on the information of the bag.

A packaging machine comprises a conveying device for advancing a web along a web advancement path at least to a tube forming station where the web is formed into a tube and for advancing the tube along a tube advancement path, a tube forming and sealing device configured to form and to longitudinally seal the tube, a tensioning device upstream of the tube forming station and configured to control the tension of the tube and a control unit configured to control packaging machine operation. The tensioning device comprises a main drive roller rotatable around a main rotation axis and a main drive motor configured to actuate rotation of the main drive roller around the main rotation axis. The control unit is configured to control the main drive motor such that angular speed and/or angular acceleration of the main drive roller is cyclically varied to control the tension of the tube.

A packaging machine comprises a conveying device for advancing a web along a web advancement path at least to a tube forming station where the web is formed into a tube and for advancing the tube along a tube advancement path, a tube forming and sealing device configured to form and to longitudinally seal the tube, a tensioning device upstream of the tube forming station and configured to control the tension of the tube and a control unit configured to control packaging machine operation. The tensioning device comprises a main drive roller rotatable around a main rotation axis and a main drive motor configured to actuate rotation of the main drive roller around the main rotation axis. The control unit is configured to control the main drive motor such that angular speed and/or angular acceleration of the main drive roller is cyclically varied to control the tension of the tube.

A cyclic packaging process, such as VFFS or HFFS, packages a product with a viscosity of ≥100,000 centipoise without leaving substantial air pockets in the package, by utilizing a means (38) for restricting upstream flow of viscous product in the strand of tubing (24). The result is that packages of uniform weight of the viscous product can be made without substantial air pockets therein, and without having to use metal clips. An apparatus (10) for carrying out the process is disclosed.

A cyclic packaging process, such as VFFS or HFFS, packages a product with a viscosity of ≥100,000 centipoise without leaving substantial air pockets in the package, by utilizing a means (38) for restricting upstream flow of viscous product in the strand of tubing (24). The result is that packages of uniform weight of the viscous product can be made without substantial air pockets therein, and without having to use metal clips. An apparatus (10) for carrying out the process is disclosed.

A vertical packaging machine that includes a forming tube having an inner passage section and retaining means associated with the forming tube. The retaining means includes a retaining device configured to be displaced between a blocking position (P1) in which it at least partially blocks the inner passage section of the forming tube, and a release position (P2) in which it does not block said inner passage section of the forming tube. While in the blocking position (P1), the retaining device is arranged at a fixed specific height and is configured to prevent a product from passing through the inner passage section of the forming tube. Upon transitioning to the release position (P2), the retaining device is withdrawn from the path to be followed by the product.

An assembly for forming bags, having a belt drive for feeding a film at a film speed to a former shoulder to form a tubular film, a set of jaws movable at a jaw speed to engage and seal a tubular film to form a closed bag, and a sensor assembly to provide a volume signal indicative of a volume of the closed bag, wherein the controller is configured to adjust at least one of the film speed and the jaw speed in response to the volume signal.

An assembly for forming bags, having a belt drive for feeding a film at a film speed to a former shoulder to form a tubular film, a set of jaws movable at a jaw speed to engage and seal a tubular film to form a closed bag, and a sensor assembly to provide a volume signal indicative of a volume of the closed bag, wherein the controller is configured to adjust at least one of the film speed and the jaw speed in response to the volume signal.

A bag-making and packaging machine includes sealing jaws, a horizontal moving device, a vertical moving device, and a control unit. The sealing jaws perform a transverse sealing operation. The vertical moving device moves the sealing jaws in a vertical direction. The vertical moving device includes a rotating shaft, a motor, and a link mechanism. The link mechanism transmits rotational force of the rotating shaft to the sealing jaws. The control unit performs first control or second control. The first control forwardly rotates and reversely rotates the rotating shaft during a period of time from a start of the transverse sealing operation to a start of a subsequent transverse sealing operation. The second control performs one of the transverse sealing operation and the subsequent transverse sealing operation with a forward rotation of the rotating shaft and the other with a reverse rotation of the rotating shaft.