Worth knowing

Adviser about Folding boxes

Tuck in flaps

A folding box with an tuck in flap is the most popular and common type of folding box. The tuck in flap is used to close the bottom of the folding box or as a lid to close it. The insert flap is a manual, non-glued folding box closure. In addition to the tuck-in flap, two additional dust flaps are often provided in the corresponding ECMA code. The tuck-in flap also has a locking tongue whose locking fasteners hook into the dust flaps when closed. This locking fastener guarantees that the tuck-in flaps are securely closed and no additional sealing material (adhesive tape, stickers) is required.

  • The locking tongue of the insert tab is 15 mm in size as standard. However, depending on the type of box, box size and requirements, this can also be enlarged or reduced in size.
  • For additional support, we recommend a folding box with tuck-in flaps and a security tab. This security tab connects the front of the folding box to the tuck-in flap and prevents the box from opening unintentionally.

Folding boxes with tuck-in flaps are mainly listed in Group A of the ECMA catalogue.

The tuck in flap as a bottom closure

The insert tab as a base closure is particularly suitable for small to medium-sized folding boxes with light product weights. The insert tab on the underside would not be able to withstand excessively heavy contents. The product could fall out when removed from the shelf, for example.

The insert tab as a bottom closure is particularly inexpensive compared to the plug-in closure and automatic bottom. Unlike the automatic bottom, the plug-in closure requires only one adhesive point and the gluing machine can produce at significantly higher speeds.

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Lasse Harder

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