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EVF41042

Double-Wall Foot-Lock Tray

Available in a wide range of custom configurations & material selection.
Order 1 sample. Or order 100K+ units. Or anything in between.
Affordable delivery across North America.
Design support, warehousing, testing, assembly available.
Widest machinery capability in America via 30+ specialist partner plants.

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Product details

Top highlights

Double-wall construction for clean, rolled edges
Foot-locks prevent long walls from bowing outward
Delivered flat for manual point-of-pack assembly

About this product

The EVF41042 is a premium, unglued folding carton tray designed for high-end retail presentation. It features a double-wall construction on all four sides, creating clean, rolled top edges that hide raw paperboard while adding vertical rigidity.

Unlike standard friction-lock trays, this design uses specialized foot-locks. These small tabs on the inner long walls slot directly into the base, anchoring the walls in place and preventing them from bowing outward when loaded with tight inserts or heavy products.

Common uses

Premium cosmetics
Electronics with dense foam inserts
High-end confectionery

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Premium Retail and Heavy Insert Presentation

Premium Retail and Cosmetics

The double-wall design hides all raw paperboard edges, providing a clean, framed look suited for high-value retail goods. The rigid walls support premium finishes and maintain a crisp appearance on the shelf.

Heavy or Tight-Fitting Inserts

When pushing a dense foam or molded insert into a standard tray, the long walls often splay outward. The foot-locks on this tray anchor the inner walls directly to the base, resisting that outward pressure and keeping the tray square.

Electronics and Device Packaging

High-end electronics often use dense molded pulp or foam inserts. The foot-lock mechanism keeps the tray walls straight even when these rigid inserts are pressed into place.

Confectionery and Gift Sets

The rolled edges create a framed presentation for assortments. The unglued construction allows the tray to ship flat and be assembled at the packing station.

Manual Kitting and Premium Fulfillment

Dedicated Kitting Lines

Since this tray requires a multi-step manual folding sequence to engage the foot-locks and wrap the short walls, it fits well in dedicated kitting lines where presentation outweighs packing speed.

Low-Volume Premium Fulfillment

For limited runs or high-value goods, the flat delivery and unglued design reduce upfront manufacturing steps while delivering a rigid, premium result.

Retail Display Programs

When the tray serves as the primary presentation vehicle on the shelf, the double walls provide the necessary rigidity to survive handling without looking crushed.

High-Speed Lines and Solid-Base Requirements

Automated Tray Forming

This tray is usually erected by hand. If your packing line relies on automated tray formers, standard glued four-corner trays or crash-lock base trays are worth comparing.

Liquid-Tight or Sift-Proof Needs

The base panel contains small slots to receive the foot-locks. If you are packing fine powders or require a solid, unbroken base, a standard friction-lock tray without base cuts is a safer choice.

Board Caliper and Base Flex Considerations

Board Caliper and Fold Clearance

Because the walls fold 180 degrees over themselves, the exact thickness of your chosen paperboard must be known before cutting. If the board is thicker or thinner than specified, the inner walls will bind or fail to seat flat against the base.

Base Flex and Product Weight

The foot-locks rely on a flat, stable base to stay engaged. If the tray is picked up with a very heavy, concentrated load that causes the base to bow downward, the locks can pull out. Testing with your actual product weight is recommended.

Insert Design and Tab Clearance

When designing foam or paperboard inserts for this tray, ensure the insert does not interfere with the small foot-lock tabs protruding slightly into the interior base corners.

Grain Direction and Fold Cracking

The 180-degree folds on the top edges require paperboard with good folding endurance. Discuss grain direction with your converter to reduce the risk of cracking along the rolled edges.

Locking Tab and Crease Adjustments

Locking Tab Width

The width of the foot-lock tabs and their corresponding base slots can be adjusted to match different board grades, ensuring a snug fit that will not tear during assembly.

Wall Height Proportions

The ratio of inner to outer wall height is calculated based on board thickness. This ensures the inner wall sits perfectly flat against the base once folded.

Base Slot Tolerances

The cuts in the base panel can be widened or narrowed depending on the chosen material, balancing assembly ease with lock retention.

Packing details

Print layout for double-wall panels

Because the inner walls fold over from the outside of the blank, both the exterior and interior walls of the assembled tray can be printed on a single side of the paperboard sheet.

Additional notes

Manual folding sequence

The long walls must be folded and locked into the base before the short walls are wrapped over the corner flaps. This specific sequence secures the entire structure without glue.

FAQs

Does this tray require glue or tape?

The tray is entirely unglued and requires no tape for assembly. It locks together mechanically using the foot-locks on the long walls and a friction-fit fold on the short walls.

Can this tray be machine-erected?

The specific sequence required to seat the foot-locks and fold the double walls means this tray is usually assembled by hand. If your line relies on automated tray formers, a glued four-corner tray may be a better fit.

Why use foot-locks instead of a standard friction lock?

Foot-locks anchor the center of the long walls directly to the base. This prevents the walls from bowing outward, which is a common problem when loading tight inserts or heavy components into standard trays.

Can I use corrugated board for this tray?

This design is designed for folding carton paperboard. While micro-flute corrugated is sometimes used, the 180-degree folds may crack or create too much bulk for the foot-locks to seat properly. Physical prototyping is recommended if attempting to use corrugated board.

What happens if I change my paperboard thickness later?

Changing the board thickness requires a structural adjustment to the template. If the template is not updated to account for the new thickness, the inner walls will either bind and tear, or fit too loosely to lock.

Can I ship this tray on its own?

This is an open-top tray designed for presentation or as an inner component. It requires an outer shipping box, a sleeve, or a lid for parcel or courier transit.

How does the print layout work for the inner walls?

Because the inner walls fold over from the outside of the flat blank, both the interior and exterior walls can often be printed on a single side of the sheet.

Do the base slots affect the tray's strength?

The slots are small, but they do break the solid base. If you are packing fine powders or very heavy items that cause the base to flex, the locks might pull out.