What is a Reverse Flap Envelope?

Folder InsertersAn envelope is just an envelope, right? Is there really that much difference from one to another? While on the surface business envelopes may seem as simple as a #9 or a #10 size, there is actually a lot more involved than you might think. A few of those differences include where the flap is located and where the windows are found.

One common question is “What is a reverse flap envelope?” Reverse flap envelopes, also known as reverse fold envelopes, have the folded flap on the bottom of the envelope rather than the top. There are a lot of reasons for this, with the primary reason being mass mailing and use with folder inserter machines.

This is an example of a reverse flap envelope:

Reverse Flap Envelopes

Reverse flap envelopes have mail inserted from the bottom rather than the top. The orientation of the address window is typically on the left side of the envelope. Bottom flap envelopes, due to the design and orientation, flow and run much better in envelope inserting machines. While most folding and inserting machines, such as those by Formax, can use a standard top flap envelope, bottom flap envelopes are preferred.

Once the bottom flap has been sealed shut, the envelope looks almost identical to a standard top flap envelope. To the customer, or envelope recipient, it is just a standard envelope. These types of envelopes are perfect for mailing bills, receipts, invoices, promotional material and more.

You can find our entire selection of Formax folder inserters here and Relyco business envelopes here.

Tags: , , , ,

Leave a Reply

CAPTCHA Image
*