B - Operations – Transporting – 67 – D
Patent
B - Operations, Transporting
67
D
222/7.2
B67D 1/00 (2006.01) B67D 1/12 (2006.01)
Patent
CA 1042855
ABSTRACT OF THE DISCLOSURE The present specification discloses a system for stock rotation of liquids, such as soft drink syrups, contained in collapsible bag-type reservoirs or replaceable packages. More specifically, it relates to an automatic change-over device for automatically switching between a primary supply reservoir and a secondary supply reservoir in response to an empty con- dition of the primary reservoir. The specification provides a device whereby two separate systems of single or multiple packages may be rotated automatically as they are empty, allow- ing for package changes to be made when time is available. It discloses such an automatic change-over device having the necessary sensitivity for dispensing viscous liquids such as syrup, and for dispensing liquids disposed in flexible bag reservoirs. The objects of the present invention are fulfilled in part by virtue of the inventor's discovery that flexible bag packages, when connected in circuit with a positive dis- placement dispensing pump, deflate when empty and create a pressure drop or vacuum in the dispensing circuit. The change- over device consists of two internal check valves and a bypass valve. Each check valve is connected by passages to separate bag package systems. The bypass valve may be oriented to bypass the check valve connected to either of the bag systems and corresponding liquid circuits. A bag circuit whose check valve is bypassed is considered to be the "primary" circuit since the pump will draw liquid from this circuit first. The bag circuit which must flow through the check valve is known as the "secondary" circuit since the other circuit must be empty before the secondary circuit can be used.
268721
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