An improved packaging machine is provided for vacuum packing elongated products such as french fries into a succession of sealed bags. The packaging machine includes a weigh station for dropping pre-weighed product charges through a vertical column for product free-fall into a bag at a fill station, with the bag being formed from a sheet of film material drawn downwardly about the column. A divider vane subdivides the vertical column and the fill station into a pair of passages of elongated cross section, whereby the products falling through the column passages are substantially aligned as they fall into the bag. The bag is transferred from the fill station to a settling station, preferably by displacement of the divider vane and fill station. The settling station includes vibratory members to achieve substantial product settling. The bag film material may also be retracted a short stroke through a seal jaw assembly, resulting in stripping and squaring of an open end of the bag. A vacuum is drawn within the bag via vacuum ports formed in the divider vane. The seal jaw assembly then seals the top of the filled bag as well as the bottom of the next bag in succession, and severs the filled bag from the film material. An improved stream-out chute and distribution funnel are also disclosed for delivering the products from the weigh station to the vertical column with product distribution which is substantially uniform across the open area of the free-fall column passages.
A method for determining bag size to adequately accommodate a food product filled into a ba y a form and fill machine, and subsequently determining the appropriate case pack configuration. The method efficiently and accurately determines a bag size that is large enough to accommodate the product that falls into the bag without interfering with the sealing process of the bag and while determining the appropriate amount of fill within the bag. The method uses various empirically determined relationships from historical bag sizing trials for a specific product and applies these relationships to a series of models in order to solve for a bag length. The method eliminates the need for costly and time-consuming bag sizing trials.
A vertical pouch forming, filling and sealing machine and method for making pouches and filling same with a liquid content in the range of about 5 to 20 liters, is described. As a pouch is being filled with a liquid it descends into a support cage to restrain the pouch from ballooning out and prevents the weight of the liquid in the filled pouch from tensioning the film in the hot horizontal seal zone of the horizontal sealer. The support cage compensates for loss of surface tension of the film in the hot horizontal seal zone during the horizontal sealing cycle. The cage also has a gate section to discharge the filled pouch by gravity after the horizontal sealing cycle.
An orientation device for vertically orienting products in a vertical form, fill and seal machine. It includes a product receipt station for receiving a plurality of unoriented products and a product discharge station for discharging a plurality of oriented products. The products are indexed in discrete groups from the product receipt station to the product discharge station, during which the products of each group are oriented with their longitudinal axes being essentially vertical.
An apparatus for producing bag packages which includes an oscillation generator, a bearing frame which transmits oscillations in the longitudinal and/or crosswise direction to a forming pipe. The forming pipe and a forming shoulder of the apparatus are rigidly joined to one another. A longitudinal seam sealing device is also joined to the bearing frame. The oscillations serve the purpose of both low-friction transport of a tube via the forming shoulder and the forming pipe and of compacting the product.
A method and apparatus for feeding substantially free flowing solid product charges (P'") in a continuous vertical form, fill and seal packaging machine (10) is disclosed. Improved transitional product flow from the computerized weigher (W) to the bag former and closer is obtained by tracking and sampling the charges along the flow path. In the method, the steps include sensing the presence of the charges along the flow path at two locations, comparing each sensed charge presence to a defined time target that has previously been determined and adjusting at least one operating step in accordance with any deviation found to cause the charge or charges to approach the defined time target for optimum operation. Either a predictive time adaptive control (77) requiring operator input, or computer control (76) can be incorporated into the method. A series of product charge flow enhancers (102, 103; 131; 121) are provided along the flow path to assist in maintaining the charges within the time target.
