Jam Cup Filling Machines

Product Formulation

Jam is available in a wide range of formulations, from smooth homogeneous products to recipes containing whole fruit pieces or fruit preparations. Marmalade typically presents additional filling considerations due to the presence of citrus peel, which may vary in size, shape and concentration throughout the product. While viscosity influences product handling, the presence, size and distribution of fruit pieces or peel inclusions are often the primary factors affecting filling system selection. Understanding the product formulation at an early stage helps determine the most suitable dosing technology and machine configuration for reliable long-term operation.

To minimise foam formation, the filling process should maintain stable product flow throughout the dosing cycle while limiting unnecessary air entrainment. Filling nozzle geometry, product flow characteristics and dosing parameters should be selected according to the product properties, required fill volume and production speed.

Fruit Piece Handling

Products containing fruit pieces require particular attention during machine specification. Standard volumetric piston filling systems are generally suitable for homogeneous jams and products containing relatively small fruit pieces. Where the maximum fruit piece size exceeds approximately 5 mm, an adapted piston dosing system with enlarged valve openings and product passages is typically recommended. This allows fruit pieces to pass through the filling system with minimal restriction, reducing the risk of product blockage while helping preserve the appearance and integrity of the fruit.

Maintaining consistent fruit distribution throughout the production run is equally important. The product supply system and dosing technology should ensure that each portion contains a representative quantity of fruit, providing consistent product presentation and helping maintain declared product specifications.

Clean Filling and Seal Integrity

Jam is typically packed into small portion cups with relatively narrow sealing flanges, making clean filling particularly important. Product contamination on the sealing surface can compromise seal integrity and increase the risk of rejected packs. The filling method, nozzle design and machine timing should therefore be configured to minimise splashing, stringing and product smearing during the filling cycle.

Where required, cup lifting or descending filling nozzles can improve product distribution within the cup, helping achieve a cleaner filling process while reducing product residue around the sealing area.

Standard Machine Configuration

For most jam applications, we typically recommend a cup filling machine equipped with a standard volumetric piston filling system. Homogeneous jams and products containing relatively small fruit pieces can generally be filled accurately without requiring specialised dosing technology. Automatic cup feeding, piston filling, pre-cut lid feeding, heat sealing and finished cup discharge are standard features on most automatic machines.

Recommended Machine Modules

Depending on the packaging specification and production requirements, additional machine modules may be incorporated to improve production flexibility, hygiene and product traceability. A roll-fed sealing system may be specified as an alternative to pre-cut lids, while optional UV-C treatment of cups and lids provides additional hygienic protection. Integrated date coding is commonly incorporated for batch identification and shelf-life marking.

Dosing System Selection

The dosing system should always be selected according to the product formulation and maximum fruit piece size. Standard volumetric piston filling is suitable for homogeneous jams and products containing relatively small fruit pieces. Where fruit pieces exceed approximately 5 mm, an adapted piston dosing system with enlarged valve openings and product passages is typically recommended to allow unrestricted product flow while helping preserve the integrity of the fruit.

Cup lifting or descending filling nozzles can improve product distribution within the cup while reducing product residue on the sealing flange. This is particularly beneficial for small portion cups, where clean filling contributes directly to reliable seal quality.

Ultra-Clean Design

Where extended shelf life or enhanced hygienic conditions are required, an Ultra-Clean configuration can be incorporated into the filling machine. This typically includes UV-C treatment of cups and lids, a laminar flow box with HEPA filtration to create positive air pressure within the filling area, and a volumetric piston filling system equipped with aseptic diaphragm valves. Optional dual-sided piston cleaning during CIP is also available for applications with more demanding hygiene requirements.