Some light hints that may point you in the right direction:

Hint 1

The assembly is a part of a larger machine.

Hint 2

Several assemblies are meant to move side by side in unison.

Hint 3

The square-ish shaped piece is plastic that will wear down and be replaced.

  • Bubs@lemm.eeOPEnglish
    1·
    15 hours ago

    Spot on.

    Answer

    It’s for pushing mail into an envelope. Three or four of them work in unison to push a stack of papers/inserts into an envelope.

      • Bubs@lemm.eeOPEnglish
        2·
        2 hours ago

        I figured it would be a tough one.

        These are mail insertion machines I worked on for several months as a mechanic. It’s a little blurry since that were moving, but here it is in action:

        • Majorllama@lemmy.worldEnglish
          1·
          8 minutes ago

          That’s cool. Never seen anything like that. I love big industrial machines that exist only to recreate an action a single human can do easily lol