System for Closing Top Load Cartons with Three Flaps

The DLS systems are designed for the sealing of filled three flap boxes with a highly compact balcony design. The DIENST DLS system automates the closing processes of filled boxes with attached cover.

Function Principle

The boxes arrive in irregular distances or in a row and get spaced fitting to the needed pitch. On both models the front flap is closed before the side flaps. 


Model DLS III operates without lugs after a 90° turn with no change in direction.

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Customer Benefit
  • individually selectable machine speeds for safe closure processes.
  • format changes by spindles with counters.
  • ensured reproducibility of all machine settings by editable save of all setting values.
  • clearly structured operation panel with self-explanatory display and visualisation of the functional sequence.
  • smooth material treatment by adapted motion profiles of servo drives for every format.
  • permanent data storage of all servo drives with trend analysis to prevent down-times.

Hot-melt application units are used for both model types to close the boxes.

Design and Equipment

The DIENST DLS I system is an angular closing machine in L-design and enables a large end flexible format size range.

The DIENST DLS III System on the other hand is designed as a straight version and turns the box 90° for glueing with no change in direction. Due to the lugless design high performances are possible.

The hygienic balcony design enables efficient production also in environments with high humidity.

  • the maximum output of DLS I systems is 120 boxes per minute, of the DLS III system up to 200.
  • base frame out of stainless steel.
  • servo technology prevents vibrations and assures a smooth and dynamic run.
Technical Data
  • mode: continuous
  • performance*:
    - DLS I = max. cycles/min.: 120
    - DLS III = max. cycles/min.: 200
  • closing techniques: hot-melt
  • format range:
    - DLS I: A = 60-400, B = 40-250, H = 15-160 mm
    - DLS II: A = 80-300, B = 80-300, H = 25-100 mm
    other formats on request
  • weight of standard machine:  approx. 1.200 kg

* depends on folded box format and/or product

  • forming of a flap lid (DLS I only).
  • network-capable production-monitoring by integration of third-party machines to the production line.
  • optical sensors detecting open flaps.
  • exfiltration station for detected incomplete packs to prevent production down-times.
  • equipment with different coding systems and types.
  • software module for remote maintenance and diagnostics.