THEORY OF OPERATION OF THE POSIFILLER
It is important to note that the Posifiller is an enclosed system. No air is allowed into the system from the surge tank, through the Posifiller premeasuring cylinder or through the fill nozzles.

Fluid product is introduced into a pressurized surge tank and is then distributed through a centralized product manifold to the Posifiller cylinders. A free-floating piston, driven by the product, travels between two positive stops. The lower stop is the bottom cylinder block, the upper stop is the adjustable volume rod, which determines the stroke of the piston inside the cylinder. This stroke of the piston determines the volume of the fill.

The key is having pressurized product on both sides of the piston at all times. To achieve this, a unique four-way spool valve is used. When there is no bottle present, the fill nozzle is closed and sealed. There is equalized product pressure on both sides of the piston placing the system in neutral. When a nozzle is cammed open by a container, pressure is relieved on the side of the piston. High-pressure product forces the piston in one direction while the low-pressure product is dispensed through the spool valve and nozzle into the bottle.

The system is designed so that the piston completes one up and one down cycle to exactly fill each bottle. Once the piston has traveled its full stroke in one direction, the spool valve is mechanically shifted reversing the product flow causing the piston to be pushed in the opposite direction. The second half of the total volume is displaced into the bottle which is now full. The piston is at its original position and the fill nozzle is closed.

The volume rod which limits the stroke of the piston is individually adjustable on each Posifiller premeasuring cylinder, enabling fine tuning to achieve the ±1/4 of 1% accuracy. The rods are attached to a motorized volume plate, operated by push-button on the control panel, which adjusts fill volumes on all stations at once.

Washdown Capable System
All drive motors are located on top of the machines for easy washdown capability. The standard NEMA-12 electrical system can also be upgraded to NEMA-4X washdown or NEMA-7 (explosion-proof) standards.

CIP (Clean-In-Place) Product Flush System
A manual CIP system is standard and an automatic CIP system is available as an option. Product change is greatly simplified. In most cases, when two products are compatible, only air-cleaning the system is required. In other applications a solvent-flush cycle can be utilized where the cleaning agent is returned to a holding vessel by the vacuum system's air-diaphragm pump.

BENEFITS OF THE LAUB/HUNT SYSTEM Posifiller high speed fillers are designed to accommodate a wide range of products from water-thin to heavy syrups and container sizes from 1 oz. to 5 gallon. No tools are required to change starwheels and only minimum tools are necessary for a complete size changeover of container height and diameter. Positive container handling. The nozzle is inserted into the container while still held by the infeed starwheel. At the discharge end, the starwheels make contact with the container before the nozzle is withdrawn. Nozzles are specially designed for each application, including special laminar flow or bottom fill nozzles for foamy products.

Fill Accuracy of ±1/4 of 1%
Extreme accuracy is achieved by moving the piston between positive stops. The spouts finish the fill and close submerged so that ambient air cannot enter the filling valves when the fill is complete. Attention to details like this result in extremely high accuracy. There are 46 claims in our first patent and 31 in our second relating to this accuracy.

No-Drip Fill Nozzles
When the spout is removed from the container, a vacuum n the bottom tip picks up drips that might fall on the next container or on the filler bed.

Stainless Steel Fill System
Brass cylinders with plastic and stainless steel components are standard. Where greater levels of sanitation are required or corrosive products have to be handled T304 or T316L stainless steel cylinders are utilized.

On-The-Fly Volume Adjustment
A motor powered adjustment sets the fill volume for all cylinders while the machine is running. Individual adjustment of each piston's stroke establishes an equalized fill for each cylinder.

Speeds up to 600/cpm
Machines are built both as In-Line and Rotary fillers, They start at a minimum of 4 heads for the In-Line version and 8 for the Rotary version. Machines as large as a 12 head In-Line and 60 heads Rotary can be produced due to the compact design of the system.

Compact Design
The unique design of the Posifiller systems allows for a smaller cross section piston to be used saving up to 35% of the floor space required, as both piston strokes, up and down, are used for product filling. Cylinders of only half the maximum volume required are used, thus reducing overall table diameter required.

Widest Volume Range
Posifillers are designed to accommodate a wide range of containers sizes, from 1 oz. to 5 gallon. Unmatched range capacity enables the fillers to run from 1 oz. to 2.5 gallon on the machine with the same set of pistons.

DIMENSIONS AND SPECIFICATIONS

Standard Features Steel construction, painted with white epoxy T304 Stainless and brass cylinders No container/No fill system Individually adjustable cylinders Prewired NEMA-12 electrical system Product return vacuum system On-the-fly volume adjustment Motorized volume compensation DC Drive with safety clutch Safety guarding 10 ft.Stainless steel conveyor channel with 4.5" delrin chain and half round guide rails with plastic adjusting knob Manual Clean-in Place system

Optional Features All stainless steel construction 316L Stainless and delrin cylinders NEMA-4X washdown-capable electrics NEMA-7 explosion-proof electrics Prewired NEMA-12 electrical system Bottom fill nozzles AC inverter drive with PLC Counter: cpm Infeed/discharge safety clutches Magnetic safety interlocks Automatic central lubrication system Independent conveyor drive CIP-Automatic Clean-in-Place system Down stream photoeye Alert light tower with sound alarm Tangential discharge Temperature compensation in conjunction with automatic check weigher. Synchronized or Monoblocked Capping Systems available with most standard cappers.