Mail-Sealing Machines Key Terms

Seal the deal and learn the terms associated with mail-sealing machines

Mail-sealing machines come in large, complex forms that can handle hundreds of envelopes per minute to smaller, desktop models that require manual feeding of the mail. Both have their benefits and drawbacks and share some of the same key terms. Understanding what types of options mail-sealing machines have will allow you to choose and operate a machine more smoothly. Learn the key terms before you're left with a mile-high stack of mail.

Flap

The flap size and shape are important when it comes to mail-sealing machines. The flap is the part of the envelope that folds over to seal it shut. Most flaps are round or pointed, but their sizes vary. Some flaps are already folded, and some need to be folded. All of these factors should be considered when choosing a mail-sealing machine.

Auto feed

Auto feed is defined as a mail-sealing machine that automatically pulls the envelopes in to be sealed. Automatic machines are usually much faster and can be left to do the work on their own.

Manual feed

The manual-feed, mail-sealing machine is usually a smaller, desktop model designed for low-volume mail sealing. A manual machine needs an operator to feed envelopes, but then it usually does the flap folding and sealing of the envelopes.

Seal gum

Seal gum is the adhesive used to seal the envelopes. Envelopes come pre-coated with seal gum or uncoated. If you use envelopes without seal gum, the mail-sealing machine must contain a seal gum to seal the envelopes instead of just a water reservoir. Some seal gum is also pressure sensitive. With these envelopes, no moistening is needed; only pressure is required.

Sealing rapidity

Simply put, sealing rapidity is the amount of time it takes to seal the envelopes. Machines will usually be labeled as envelopes per minute or hour. Most machines will also include features so the rapidity, or speed, can be adjusted.

Reservoir

The reservoir is the area on the mail-sealing machine that houses the water used to seal the envelopes. Reservoirs come in different sizes and shapes. Some are also made transparent so you can keep an eye on the water level.

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