Can Seaming Machine Suppliers & Manufacturers
Find can seaming machine manufacturers and suppliers on Towobo. Compare bench-top manual seamers, semi-automatic can closers, and inline automatic double-seam seamers for tinplate food cans, aluminium beverage cans, and steel paint cans — in a range of diameters and output speeds.
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Browse Can Seaming Machine Suppliers →Double-seam can seaming principle and applications
A can seaming machine (also called a can closer or double seamer) closes a filled can by mechanically joining the can body and lid (end) using a two-operation double-seam process. The double-seam process: the filled can is placed on the seaming machine; the lid is placed on top of the can body; in the first seaming operation, a seaming roll hooks the lid flange and the body flange together; in the second seaming operation, a tighter seaming roll irons and compresses the double-seam into a hermetic closure. A properly formed double seam provides an air-tight, liquid-tight, and vacuum-tight closure suitable for retort (high-temperature) sterilisation of food products. Can seaming machines are used for: food cans — vegetables, fruit, meat, fish, soups, sauces, pet food in tinplate cans; beverage cans — beer, CSD, energy drinks, sparkling water in aluminium cans (these use high-speed automatic seamers integrated into filling lines at thousands of cans per minute for industrial scale); paint and chemical cans — tinplate cans for paint, varnish, chemicals in 0.5L to 20L sizes; aerosol can seaming — crimping the seamer (bottom dome) onto the aerosol can body. Can diameters most commonly range from 52mm (small food or beverage cans) to 153mm (large catering cans). The can body diameter, lid diameter, and seaming roll profile must be matched precisely — they are not interchangeable between different can standards.
Machine configurations and sourcing
Can seaming machines are available across a wide range of output speeds and automation levels. Bench-top manual seamers — a single-head, manually operated machine; the operator places the can and lid, and cranks or pedals to perform the two-seam operations; output 10–60 cans per hour; suitable for small craft producers, home canners, and R&D. Semi-automatic single-head seamers — a motorised single-head machine where the operator places the can and lid; output 100–600 cans per hour; suitable for craft breweries, small food producers, and pilot production. Automatic inline seamers — multiple seaming heads on a rotating turntable; cans are conveyed automatically; output 500–5,000 cans per hour for food can production; suitable for small to medium food manufacturers and craft breweries. High-speed industrial can seamers (for beverage cans) — large-scale machines integrated into beverage canning lines, operating at 1,000–3,000+ cans per minute for major CSD and beer producers; these are large-scale capital investments from Ferrum, Pneumatic Scale Angelus, and similar specialist suppliers. When sourcing a can seaming machine, specify: can diameter and body height, can material (tinplate or aluminium), lid diameter and specification, required output speed, and integration requirements with filling line and gas-flushing equipment. The seaming tooling (first and second seaming rolls, chuck) must match the can and lid dimensions exactly — request a seaming performance test with your actual cans and lids before accepting the machine.
Frequently asked questions
How do I verify that my canned food is properly seamed for safety?
The double seam must be measured and verified against the can manufacturer's seam specifications using a seam scope (optical measurement tool) or a physical tear-down test. Key measurements are seam height, seam thickness, body hook length, cover hook length, and overlap length. For commercially canned food that will be retort-processed (heat-sterilised), the seam must be tested before and after retorting to confirm it survives the thermal process. Food safety regulations in most markets require canning facilities to have documented seam evaluation procedures with regular seam measurement records maintained by trained operators.
Can I use the same seaming machine for different can diameters?
Most can seamers require a tooling change (seaming rolls and chuck) to handle different can diameters. This is because the seam geometry — the profiles of the first and second seaming rolls and the drive chuck — must match the specific can and lid dimensions. Multi-diameter machines with quick-change tooling are available; confirm the specific can sizes and lid specifications you need to run when requesting a quotation. Changing can height (with the same diameter) is typically easier and requires only adjustment of the can platform height, not a tooling change.
Do I need gas flushing before can seaming for canned food?
For many canned food products, a headspace gas flush (replacing oxygen in the headspace with nitrogen or CO₂ before seaming) reduces oxygen content in the sealed can, extending product shelf life and maintaining product colour. This is particularly important for products sensitive to oxidation (coffee, pet food, certain vegetables). Gas flushing is performed immediately before the seaming operation, using a snorkel nozzle that injects gas into the can headspace as the lid is placed. Whether gas flushing is required, and the target residual oxygen level, depends on the product and shelf life target. Confirm with your product technologist.
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