| Manual Tray Sealer |
Heat sealing with a manually operated sealing die |
Benchtop or compact floor-standing frame; one tray cavity is commonly loaded and unloaded by the operator |
Approximately 2–8 cycles per minute, depending on operator speed and dwell time |
Usually atmospheric sealing; optional gas flushing is available on selected configurations |
Rigid or semi-rigid plastic trays; commonly uses heat-sealable lidding film supplied from a roll |
Restaurants, laboratories, small food producers, pilot production and seasonal products |
Low investment, simple operation, small footprint and quick product changeover |
Labor cost, operator consistency, limited output and fewer options for inline automation |
| Semi-Automatic Tray Sealer |
Heat sealing using a pneumatic or motor-driven sealing die |
Single-station or twin-station frame; trays are manually loaded while sealing, film cutting and ejecting are machine-assisted |
Approximately 5–20 cycles per minute |
Atmospheric sealing or intermittent gas flushing; vacuum and gas functions depend on chamber design |
Plastic, coated paperboard and selected compostable trays with compatible heat-seal coatings |
Small and medium food-processing operations, prepared meals, fresh produce and deli products |
Better seal consistency and productivity than manual systems without the cost of a fully automatic line |
Check tray indexing, tool-change time, gas consumption, film registration and operator access requirements |
| Automatic Inline Tray Sealer |
Continuous or intermittent heat sealing with automatic film feeding and cutting |
Conveyor-fed linear structure with automatic tray spacing, sealing station, film unwind, scrap rewinding and discharge conveyor |
Approximately 20–80 cycles per minute, depending on the number of lanes and cavities |
Atmospheric sealing, gas flushing, vacuum-gas packaging and modified-atmosphere packaging (MAP) |
Rigid trays with consistent dimensions; compatible with PET, PP, PE-coated board and other approved sealant-layer structures |
High-volume fresh foods, ready meals, meat, seafood, bakery and produce packing lines |
High throughput, repeatable sealing, integration with fillers, checkweighers, metal detectors and case packers |
Requires accurate upstream tray loading, stable tray tolerances, sufficient floor space and coordinated line speeds |
| Rotary or Carousel Tray Sealer |
Heat sealing in indexed rotary stations; vacuum and gas processes can be performed inside a chamber |
Rotating table or carousel with several tooling stations for loading, sealing, cutting and unloading |
Approximately 30–100 cycles per minute, depending on station count, product type and sealing process |
Suitable for atmospheric sealing, gas flushing, vacuum-gas MAP and some vacuum applications |
Standardized trays and pre-cut or reel-fed lidding film; tooling is generally product-specific |
Medium- to high-volume food production where compact footprint and fast indexing are important |
Good output in a relatively compact area; multiple operations can be distributed across stations |
More complex tooling and maintenance; rotary indexing must be matched to tray rigidity and product presentation |
| Vacuum Chamber Tray Sealer |
Vacuum removal followed by heat sealing; gas backfilling may be added |
Sealing die is enclosed by a chamber or bell; the chamber is evacuated before the film is sealed to the tray flange |
Approximately 1–6 cycles per minute, depending on chamber volume, vacuum level and number of cavities |
Vacuum sealing and vacuum-gas MAP; suitable for products where air reduction is a priority |
Rigid trays with sufficient mechanical strength to withstand pressure changes; films must be designed for the sealing process |
Meat, seafood, cheese, high-value products and applications requiring reduced residual oxygen |
Reduces trapped air and can support extended quality when combined with suitable product, film and cold-chain controls |
Longer cycle time, higher pump requirements and possible product deformation; process validation is essential |
| MAP Gas-Flushing Tray Sealer |
Air displacement by a controlled gas mixture followed by heat sealing |
Intermittent or inline sealing chamber with gas injection, pressure control and film sealing station |
Approximately 5–60 cycles per minute, depending on chamber design, gas exchange method and cavity count |
Modified-atmosphere packaging using gases such as carbon dioxide, nitrogen or oxygen mixtures selected for the product |
Gas-tight trays and lidding films with suitable oxygen and carbon-dioxide barrier properties |
Fresh meat, poultry, seafood, prepared foods, cheese and selected bakery products |
Can help control oxidation and microbial growth when the gas recipe, seal integrity and cold chain are properly managed |
Gas mixture, residual oxygen, leak rate, product respiration and film barrier performance must be verified |
| Vacuum Skin Packaging Machine |
Heated skin film is drawn tightly over the product and sealed to a coated tray, usually with vacuum assistance |
Forming-and-sealing station with a flexible upper film system and product-specific lower tray tooling |
Approximately 5–30 cycles per minute, depending on film heating, vacuum level and cavity arrangement |
Uses vacuum to create close product contact; it is not the same process as conventional gas-flush MAP |
Rigid trays with suitable sealant coatings; flexible skin films must have appropriate stretch, puncture and barrier properties |
Fresh meat, seafood, cheese, premium ready meals and products presented in a high-visibility package |
Close product contact, attractive presentation, reduced purge movement and strong protection against handling damage |
Requires accurate film temperature, product height control, compatible tray coatings and careful control of sharp product edges |
| Thermoform-Fill-Seal System |
Bottom web is heated and thermoformed; the filled package is then sealed with a top web |
Continuous web-based structure with forming, filling, gas or vacuum processing, sealing, cutting and discharge sections |
Approximately 10–40 cycles per minute; output is commonly measured by packages per minute and cavity count |
Atmospheric, vacuum, gas flushing and vacuum-gas MAP configurations are available |
Flexible or semi-rigid bottom webs and lidding films selected for forming, sealing, barrier and recycling requirements |
High-volume meat, cheese, seafood, ready meals and products requiring customized package dimensions |
Efficient material use, flexible pack size, strong automation potential and reduced reliance on pre-made trays |
Higher capital cost, more complex film specification, longer changeovers and greater demand for process expertise |
| Ultrasonic Tray Sealer |
Ultrasonic energy creates localized heat at the seal interface instead of heating the complete sealing tool |
Sealing horn and anvil system integrated into a linear or indexed machine frame |
Approximately 10–50 cycles per minute, depending on tray material, sealing area and equipment configuration |
Generally atmospheric; gas-flush capability depends on the surrounding chamber and machine layout |
Requires carefully matched tray and film structures; multilayer materials and sealant layers must be validated for ultrasonic compatibility |
Selected food, medical, pharmaceutical and technical packaging applications where controlled energy input is valuable |
Fast localized sealing, low heat transfer to the product and potential for reduced tool warm-up time |
Material compatibility is critical; tooling, amplitude, pressure and weld time require application-specific validation |
| High-Speed Multi-Lane Tray Sealer |
Parallel heat-sealing operations using multiple cavities or lanes in one sealing cycle |
Servo-driven conveyor or indexed platform with multi-cavity tooling, automatic film handling and integrated discharge |
Approximately 60–200 packages per minute, depending on cavity count, tray size and product handling |
Atmospheric sealing, gas flushing, vacuum-gas MAP and other validated chamber processes |
Uniform trays with tight dimensional tolerances; film registration and sealant compatibility are essential |
Large-scale production of fresh food, ready meals, dairy products, meat and seafood |
High labor efficiency, stable cycle control and efficient connection to automated upstream and downstream equipment |
Highest sensitivity to tray dimensional variation, film tracking, product contamination and maintenance quality |