AFM300S High Speed Envelope Sealer
The AFM300S is a durable, high-speed envelope sealer — a Swiss-built machine that seals all common formats from C6/5 to C4 at up to 300 envelopes per minute with no manual flap handling.
Description
About the AFM300S
The AFM300S Envelope Sealer will probably be the last envelope sealer you ever need to buy. This durable, high-speed machine seals all common envelope formats from C6/5 to C4 Pocket cleanly and quickly — up to 300 envelopes per minute — with no manual opening of flaps, handling or pressing of the letter piles. It’s the result of decades of development in mail-processing machines: a fully developed, quality Swiss product.
Its deep 460 mm design suits all common formats — C5, C6/5, C4 and B4, plus C4 Pocket (324 x 229 mm), ideal with the flap on the short side. It’s offered in two series: the standard version with a short receiving tray (278 mm, optionally a long 380 mm tray for C4/B4), and the AFM300SE, which adds an integrated photoelectric infrared start/stop system so your hands are free to load and unload with no empty cycles and less wear. The SATURN piling option seals both normal stacked and nested envelopes. Use Supplies For Mailers Sealing Fluid concentrate to activate the glue fast and reduce mold buildup.
AFM300S Specifications
| Model | AFM300S High Speed Envelope Sealer |
|---|---|
| Machine type | High-speed automatic envelope sealer |
| Speed | Up to 300 envelopes per minute |
| Envelope formats | All common formats from C6/5 to C4 Pocket — C5, C6/5, C4, B4, and C4 Pocket (324 x 229 mm) |
| Machine depth | 460 mm — suits C4 Pocket work with the flap on the short side |
| Receiving tray | Standard short tray 278 mm; optional long 380 mm tray for C4/B4 |
| AFM300SE version | Adds an integrated photoelectric infrared start/stop system, so the machine runs only while envelopes feed — no empty cycles, less wear |
| SATURN piling option | Seals both normal stacked and nested envelopes |
| Flap handling | No manual opening of flaps and no handling or pressing of letter piles |
| Build | Swiss-manufactured |
| Recommended supply | Supplies For Mailers sealing fluid concentrate — activates glue quickly and reduces mold buildup |
Figures above come from this product’s own published page copy. No manufacturer spec sheet for the AFM300S is on file, so envelope thickness range, dimensions, weight and power are omitted rather than estimated — call 866-430-2874 for those.
Still Supported by All For Mailers
The AFM300S is an All For Mailers offering supported with genuine parts and sealing supplies. As a veteran-owned dealer, expert since 1991, we can help you keep it running or spec the right high-speed sealer for your volume.
Protect what you have. These machines were built to last, and the mechanics will outlive the electronics every time. If you’re running one, put it on a quality surge protector, and add static protection — especially in dry winter air or on high-speed paper handling. Power spikes and static are what kill boards, and on these machines a board may not be replaceable at any price. It’s the cheapest insurance there is for equipment you can’t simply reorder.
Need supplies or parts? Visit SuppliesForMailers.com.
Additional information
| Speed (pieces/hr) | Up to 300 envelopes per minute |
|---|
Frequently Asked Questions
Is the AFM300S still available?
Contact us for current pricing and availability on the AFM300S and its SE and SATURN options.
How fast is the AFM300S and what formats does it seal?
Up to 300 envelopes per minute, sealing all common formats from C6/5 to C4/B4, including C4 Pocket, standard or nested.
What is the difference between the AFM300S and the AFM300SE?
Mechanically the same sealer. The AFM300SE adds an integrated photoelectric infrared start/stop system that runs the machine only while envelopes are feeding, which frees the operator’s hands and cuts empty-cycle wear.
Can I still get parts and supplies?
Yes — visit SuppliesForMailers.com or call 866-430-2874.
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