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A mixing system includes a portioning device for sequentially supplying batches of a specified quantity of foodstuffs at a supply location. A mixing device includes a number of mixing chambers which can be sequentially aligned with the foodstuff supply location. A dispenser is provided for dispensin

A mixing system includes a portioning device for sequentially supplying batches of a specified quantity of foodstuffs at a supply location. A mixing device includes a number of mixing chambers which can be sequentially aligned with the foodstuff supply location. A dispenser is provided for dispensing measured quantities of an additive at an additive supply location spaced from the foodstuff supply location. The mixing chambers are movable about a closed path so as to be sequentially brought into alignment with the foodstuff supply location and the additive supply location. A control system controls operation of the portion device, mixing device and dispenser. A packaging device is disposed downstream to the supply location and below the mixing device for packaging the batch of foodstuffs in a bag. Each mixing chamber is operable above the packaging device to discharge its contents into the packaging device.

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What is claimed is: 1. A mixing system comprising: a portioning device for sequentially supplying batches of a specified quantity of foodstuffs at a supply location; a mixing device including a number of mixing chambers which can be sequentially aligned with the foodstuff supply location; a dispens

What is claimed is: 1. A mixing system comprising: a portioning device for sequentially supplying batches of a specified quantity of foodstuffs at a supply location; a mixing device including a number of mixing chambers which can be sequentially aligned with the foodstuff supply location; a dispenser for dispensing measured quantities of an additive at an additive supply location spaced from the foodstuff supply location, wherein the mixing chambers are movable about a closed path so as to be brought sequentially into alignment with the foodstuff supply location and the additive supply location; a control system for controlling operation of the portioning device, mixing device and dispenser; a packaging device downstream to the supply location and below the mixing device for packaging said batch of foodstuffs in a bag, each mixing chamber being operable above the packaging device to discharge contents thereof into the packaging device; and one or more additional additive dispensers, each associated with a respective additive supply location located along the path of movement of the mixing chambers; wherein the mixing chambers are mounted on a rotary support, the control system being adapted to cause rotation of the support and hence movement of the mixing chambers along the closed path and each mixing chamber is rotatably mounted about a substantially horizontal axis. 2. The system of claim 1, wherein said portioning device comprises a weigh device which serves to supply foodstuffs to a plurality of weigh hoppers, to measure individual weights of items in said weigh hoppers, to select a combination of said weigh hoppers with a specified weight on the basis of the measured weights and to thereby supply one of said batches. 3. The system of claim 1 further comprising: a sensor for monitoring discharge of additive by the dispenser; and a sorting device for discarding a packaged product packaged by said packaging device if said sensor detects an abnormality in said discharge of said additive. 4. The system of claim 1 wherein said packaging device is a vertical pillow packaging machine which serves to form an elongated film into a tubular form to produce a bag while filling said bag with said batch of foodstuffs, to seal said film between said bag and another bag being subsequently formed, and to cut said film to separate said bag from said another bag. 5. A mixing system comprising: a portioning device for sequentially supplying batches of a specified quantity of foodstuffs at a supply location; a mixing device including a number of mixing chambers which serve to mix foodstuffs therein together and can be sequentially aligned with the foodstuff supply location; a dispenser for dispensing measured quantities of an additive at an additive supply location spaced from the foodstuff supply location, wherein the mixing chambers are movable about a closed path so as to be brought sequentially into alignment with the foodstuff supply location and the additive supply location; a control system for controlling operation of the portioning device, mixing device and dispenser; a packaging device downstream to the supply location and below the mixing device for packaging said batch of foodstuffs in a bag, each mixing chamber being operable above the packaging device to discharge contents thereof into the packaging device; and one or more additional additive dispensers, each associated with a respective additive supply location located along the path of movement of the mixing chambers; wherein the mixing chambers are mounted on a rotary support, the control system being adapted to cause rotation of the support and hence movement of the mixing chambers along the closed path and each mixing chamber is rotatably mounted about a substantially horizontal axis. 6. The system of claim 5, wherein said portioning device comprises a weigh device which serves to supply foodstuffs to a plurality of weigh hoppers, to measure individual weights of items in said weigh hoppers, to select a combination of said weigh hoppers with a specified weight on the basis of the measured weights and to thereby supply one of said batches. 7. The system of claim 5, further comprising: a sensor for monitoring discharge of additive by the dispenser; and a sorting device for discarding a packaged product packaged by said packaging device if said sensor detects an abnormality in said discharge of said additive. 8. The system of claim 5 wherein said packaging device is a vertical pillow packaging machine which serves to form an elongated film into a tubular form to produce a bag while filling said bag with said batch of foodstuffs, to seal said film between said bag and another bag being subsequently formed, and to cut said film to separate said bag from said another bag.