What is a Cup Filling and Sealing Machine? Types, Speeds and Applications

A cup filling and sealing machine fills pre-formed cups or pots with a measured dose of product and then seals each one in a single, continuous cycle. It is the equipment behind the yoghurt pots, cream tubs, sauce cups and spread containers that move through a production line in their thousands every hour. Across NPP’s filling and sealing machinery range, these machines handle liquid, creamy, pasty and granular products, including liquids that carry solid pieces in suspension. This guide explains how they work, the difference between rotary and in-line models, the speeds you can expect and what to check before you choose one.

How does a cup filling and sealing machine work?

Whatever the configuration, the process follows the same logical sequence. Empty cups are fed into the machine, dosed with product, closed with a lid or film, sealed and then discharged ready for downstream packaging. Each stage is handled by a dedicated station so the line keeps moving without stopping between cups.

The full cycle breaks down into five steps:

• Cup infeed – empty cups are loaded into the machine and indexed into position.
• Filling – a dosing station deposits a precise volume of product into each cup.
• Lid or film application – a pre-cut lid is placed, or film is drawn over the cup.
• Sealing – heat or pressure bonds the lid or film to the rim for a secure, airtight closure.
• Discharge – finished, sealed cups leave the machine for labelling, cartoning or palletising.

Sealing can be done with a pre-cut lid or with film, and the closure material itself can be plastic, aluminium or paper-based, depending on the product and the shelf life it needs. Machines in NPP’s ILPRA range can also apply different preservation methods at the sealing stage, including gas flush and modified atmosphere packaging, which is covered in more detail further down.

Types of cup filling and sealing machines

Cup filling and sealing machines come in two main layouts: rotary and in-line. The right choice depends on your output, the products you run and the level of integration you need with the rest of your line. NPP supplies both.

Rotary filling and sealing machines

A rotary machine works around a circular table. Cups travel around the table and pass through each work station in turn – infeed, filling, sealing and discharge, as the table indexes round. On servo-driven models, the timing of each phase can be tuned independently, which improves both productivity and the way the machine handles product and containers.

NPP’s rotary filling machines come from ILPRA’s Fill Seal line and scale from compact units up to high-capacity systems:

• Fill Seal 2500 – a compact, versatile rotary model that processes one cup per station at an approximate output of 2,500 pieces per hour. It is operated from a touch screen panel, comes in standard, large and XL sizes, and suits medium-sized producers running dairy, sauces and cream.
• Fill Seal 5000 – one of the most requested models in the range, built for medium-scale production. It packages products such as yoghurt, cheese, butter, honey and sauces.
• Fill Seal 7000 – a servo-driven machine that runs three cups per station and is available in a lid version. It can dose several products at once, even at different consistencies, and packs into plastic, paper and aluminium-base containers, which makes it a strong option for medium and large capacity production that needs to integrate with secondary packaging.
• Fill Seal R12 – the high-capacity option, with a rotary table and servo-driven work stations handling up to six cups per station. It includes a CIP (clean-in-place) dosing unit, offers MAP packaging, and is available in both film and lid versions.

In short, the rotary models give food and dairy producers a clear path from medium output up to high-volume runs, without changing the underlying way the machine works.

In-line filling and sealing machines

An in-line machine moves cups in a straight line, indexing them forward through each station rather than around a table. This layout integrates neatly into a continuous production line and is the configuration NPP supplies for its highest-volume and most specialised applications.

NPP’s in-line filling machines cover two very different needs:

• Large-scale food production – the ILPRA Fill Seal In-Line range is ILPRA’s answer to the demands of large-scale production, built for high, continuous throughput.
• Pharmaceutical and life sciences – the Machinelab series brings servo-driven, precision dosing to regulated environments. The MLF160A-HV is a monoblock filling machine for liquids of all viscosities in pharmaceutical and life sciences production; the MLHF400SA is a compact horizontal machine for pharmaceutical and medical applications; and the 8-Nozzle Servo-Driven system is engineered for the demands of pharmaceutical and medical device liquid processing.

So while both ILPRA and Machinelab machines share the in-line layout, they answer different briefs: one for high-volume food, the other for precise, hygienic dosing in pharma and medical device manufacturing.

What products can be filled and sealed in cups?

Cup filling and sealing machines are built for products that pour, spread or flow. NPP’s range handles liquid, creamy, pasty and granular products, including liquids that carry solid pieces in suspension, a fruit yoghurt with pieces is a good everyday example.

In practice, the products fall into two broad groups:

• Food and dairy – yoghurt, cream, cheese, butter, honey, sauces, spreads and other food ingredients. These are the everyday applications for the ILPRA Fill Seal machines.
• Pharmaceutical and medical – formulations that need precise dosing and a clean, hermetic seal. These are served by the Machinelab range, which is designed around the hygiene and accuracy these sectors demand.

Key specifications to consider

If you are comparing machines, a handful of specifications will shape the decision more than anything else. Use these as your checklist:

• Output speed – expressed in cups (or pots) per hour. The Fill Seal 2500, for example, runs at an approximate 2,500 pieces per hour; larger models scale well beyond that.
• Cups per station – a key driver of throughput. Models range from one cup per station up to six on the R12.
• Container format – confirm the diameter, depth and material the machine can handle. NPP’s machines run cups and pre-formed containers in PET, rPET, PP and other plastics, as well as glass, aluminium, cardboard and ceramics.
• Lid and film type – sealing can use a pre-cut lid or film, in plastic, aluminium or paper base. Your choice affects both appearance and shelf life.
• Preservation method – some models offer sealing, gas flush, MAP/ATP and vacuum options. The R12 offers MAP packaging; the 2500 supports MAP/ATP and vacuum.
• CIP (clean-in-place) dosing – available on the R12 and 7000, this simplifies cleaning between runs. Confirm availability on other models.
• Footprint and integration – consider how the machine fits your floor space and whether it needs to feed into secondary packaging. The 7000, for instance, is built to integrate with downstream systems.

Who uses cup filling and sealing machines?

Two clear groups rely on this equipment, and NPP’s range reflects both. Food and dairy producers use the ILPRA Fill Seal machines to pack products like yoghurt, cream, cheese, butter, honey, sauces and spreads at scale, from medium-sized operations up to high-volume lines. Pharmaceutical and medical device manufacturers turn to the Machinelab machines, where servo-driven precision dosing and hygienic, hermetic sealing matter more than raw speed.

Frequently asked questions

What is the difference between a rotary and an in-line filling machine?

A rotary machine moves cups around a circular table through each work station, while an in-line machine indexes them forward in a straight line. Rotary models, like the ILPRA Fill Seal range, suit consistent food and dairy output across a wide capacity range. In-line models fit neatly into continuous production lines and, in NPP’s range, cover both large-scale food production and precision pharmaceutical filling.

What types of containers can a cup filling machine handle?

NPP’s machines process cups and pre-formed containers made from PET, rPET, PP and other plastics, as well as glass, aluminium, cardboard and ceramics. After filling, each container is closed with a pre-cut film or lid in a plastic, aluminium or paper base.

Are cup filling machines suitable for pharmaceutical production?

Yes. NPP supplies the Machinelab range specifically for pharmaceutical, life sciences and medical device applications. These servo-driven machines deliver the precise dosing and clean, contamination-free sealing that regulated production requires.

What fill speeds can cup filling machines achieve?

Speed depends on the model and how many cups it fills per station. The compact Fill Seal 2500 runs at an approximate 2,500 pieces per hour with one cup per station, while higher-capacity models such as the 7000 (three cups per station) and the R12 (up to six cups per station) deliver considerably more for medium and large-scale production.

Can one machine handle multiple cup sizes?

Many models are designed for flexibility. The Fill Seal 2500, for example, is available in standard, large and XL sizes to suit different production scales, and the R12 features a simplified mould change to switch formats. For confirmation on a specific cup size or format, it is best to check the requirement with the NPP team.

Find the right machine for your line

Whether you are packing dairy at medium volume or running a large-scale food or pharmaceutical line, there is a model in NPP’s range to match. Browse the full filling and sealing machinery category to compare options, or go straight to the rotary and in-line ranges to narrow it down by configuration. The NPP team is on hand to help you match a machine to your product, output and container format.