Foot Lock Tray Boxes
A tray with foot-lock corners that interlock for a secure, glue-free structural base.
Structural & Engineering Details
How This Structure Works
A foot-lock tray raises its corners with tabs that interlock like feet, forming a squared base without glue. The locking corners hold the walls upright under the tension of the folded tabs, so the tray stays firm once assembled. With an open top, the geometry favors quick loading and clear visibility while the glue-free corners keep assembly simple and clean. This can suit bakery, produce, or gift trays where a tidy, adhesive-free build matters and the tray must hold shape when filled. Because the lock is structural, the tray ships flat and squares up by folding and engaging the corner feet in a few motions.
Good Fit For
- Bakery, produce, and gift trays
- Glue-free assembly on the bench
- Open trays that must hold shape
Key Advantages
- Corner feet lock the walls without glue
- Open top keeps loading quick
- Ships flat and assembles by folding
Assembly & Construction
The corner tabs fold and interlock as feet so the raised walls hold square under the tension of the engaged locks, forming the tray without adhesive. The open top keeps assembly to folding the walls and seating the corner locks. Packers raise the sides, engage each foot lock, and load from above, so the tray builds cleanly and holds its shape through an even fill without any glue step at pack-out.
Materials & Board Options
A firm paperboard suits lighter foot-lock trays where crisp corner folds hold the lock, while heavier loads can point to a corrugated grade for wall support. The lock relies on a caliper that folds cleanly yet resists springing open. Final board, any flute, and coating typically depend on the contents weight, tray size, print, and handling, so a loaded sample usually confirms the corners stay engaged.
Pre-Production Planning Checklist
- Confirm the corner feet stay locked under an even fill
- Check the walls hold square without springing open
- Verify corner folds stay crisp at the chosen caliper
