Trays and punnets
Plastic, aluminium, foam, paperboard and CPET-style packs for filling, sealing and packing lines.
Automatic container separation
Denesters for trays, cups, pots and containers.
Automatically separate nested packaging and place one item at a time onto a conveyor, filler, tray sealer or packing line.
- Single or multi-lane
- Format-adjustable
- Stack monitoring
- Line integration
How it works
What is a denester?
A denester stores a nested stack of trays, cups, pots, tubs or similar containers in a magazine, separates the lowest item from the stack and releases it in a repeatable position. The discharge is synchronised with the conveyor or process machine so empty containers arrive at the correct pitch without continuous manual placement.
System overview
Built around the actual container and nested stack.
The release mechanism is selected after reviewing the flange, wall stiffness, material, static, stack pressure and the way the containers separate in production. A complete unit can include one or more magazines, adjustable guides, level sensing, conveyor placement, guarding and PLC controls.
- Automatic one-at-a-time release from nested stacks
- Mechanical, vacuum or air-assisted separation to suit the pack
- Single, twin or multi-lane layouts subject to line pitch and rate
- Low-stack, no-container and jam detection linked to the process machine
Suitable formats
Container families commonly assessed.
Cups, pots and tubs
Round or shaped containers requiring controlled release to a conveyor, rotary machine or index station.
Multi-lane packaging
Several magazines and synchronised discharge where the process runs parallel lanes.
Engineering decisions
Reliable denesting depends on the stack, release and hand-off.
The following points are confirmed before the final mechanism and control sequence are fixed.
Separation method
Vacuum, air, mechanical fingers, controlled flexing or combined techniques are selected from real stack behaviour.
Magazine and changeover
Guide positions, stack capacity, replenishment access and repeatable format settings determine day-to-day usability.
Discharge control
Container presence, pitch, conveyor speed and the downstream machine handshake determine the release timing.
Configuration routes
Choose the level of automation the line requires.
Single-magazine denester
A compact solution for one container format and one process lane.
Multi-magazine system
Extended autonomy or parallel lanes with monitored stack positions and coordinated discharge.
Automatic stack replenishment
Additional tray-stack storage and transfer to reduce repeated operator loading.
Technology comparison
Denesting is different from loose-part feeding.
| Requirement | Denester | Loose-part feeder | Pick-and-place system |
|---|---|---|---|
| Starting condition | Nested stack of containers | Random bulk components | Presented, conveyed or randomly arranged parts |
| Primary function | Separate and place one container | Singulate and orient parts | Pick, reorient and place |
| Typical output | Conveyor, filler, sealer or packing machine | Track, escapement or process datum | Fixture, nest, package or assembly position |
| Main proof point | Reliable separation across real stack variation | Sustained accepted orientation and rate | Cycle time, pick reliability and placement accuracy |
Project definition
Information we need for an accurate proposal.
Samples from normal production are important because moulding variation, static, contamination and storage conditions can affect release.
| Container | Material, dimensions, drawings, flange geometry, weight and surface condition. |
|---|---|
| Nested stack | Stack height, nesting pitch, variation, orientation and replenishment method. |
| Output | Containers per minute, lanes, pitch, datum and allowed double-feed rate. |
| Downstream machine | Conveyor details, index signal, available space, height and line-control interface. |
| Environment | Food contact, washdown, temperature, dust, static and material restrictions. |
| Acceptance | Test quantity, sustained run, changeover formats and agreed fault-recovery criteria. |
Application review
Send a stack of the real containers.
Provide drawings, samples, required lane count, target output and the downstream machine details. We will recommend the magazine, separation principle and line interface to assess.
Common questions
Denester questions.
What products can a denester handle?
Typical applications include plastic, aluminium, foam and paperboard trays, cups, pots, tubs, punnets and other rigid containers. Suitability depends on the stack, flange geometry, rigidity, static, surface condition and how consistently the items separate.
Can one denester run more than one format?
Yes, where the formats fall within the mechanical adjustment range. Change parts, guides, magazine settings or stored recipes may be required, and the changeover method should be agreed during design.
How are containers separated when they stick together?
The release method may combine vacuum, air assistance, controlled flexing, mechanical fingers or timed motion. Representative stacks are tested because humidity, static and moulding variation can change denesting behaviour.
Can denesters be supplied for multiple lanes?
Yes. Single-lane and multi-lane arrangements can be considered, with one or more magazines feeding the conveyor or packaging machine at the required pitch.
Can the denester integrate with an existing tray sealer or filler?
Yes. The interface can include conveyor positioning, machine-ready signals, low-stack warning, no-container detection, jam recovery and a defined stop or inhibit handshake.
What information is needed for a quotation?
Provide container drawings or dimensions, nested stack height, material, samples, required rate, lane count, discharge height, available space and details of the downstream conveyor or machine.
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