Packing pocket

A packing pocket (9) for an inserting system (1), wherein the packing pocket (9) comprises:

• a plurality of slats (28) extending in a direction parallel to a mid-line M, the mid-line M corresponding to a transport direction of envelopes, each slat (28) including a flap guide (13) extending in a plane K, wherein at least one of the slats (28) is configured to be mounted on the inserting system (1), on a mounting rail (15), on an adjustment rail (35), or at least on a mounting stop, and
• a sheet guide (30) extending in a direction parallel to the mid-line M, wherein a first end of the sheet guide (30) is spaced from a first end of the plurality of slats (28) to define an opening for receiving envelope contents (5) and a second end of the sheet guide (3) is resiliently biased in contact with a distal end of the flap guide (13), characterized in that the at least one of the slats (28) configured to be mounted on the inserting system is designed to be mounted in such a way to the inserting system (1), that the at least one of the slats (28) does not have to be moved during an inserting operation, wherefore the first end of the sheet guide (30) is fixedly connected to the at least one of the slats (28), or to the mounting rail (15), or to the adjustment rail (35) or at least to one stop or to the inserting system (1).