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EVF41004

Self-Locking Roll-End 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

Erects manually without glue or tape
Double-wall edges provide a clean retail finish
Ships and stores completely flat

About this product

This flat-shipped folding carton tray erects manually without glue, using double-thick walls that roll over and lock into place. The result is a clean, finished edge on two sides, making it a strong choice for retail presentation, bakery kitting, or sliding into an outer sleeve.

Because it relies on a friction fit rather than glued corners or mechanical base slots, it is often chosen for hand-packing operations and lightweight to medium-weight products.

Common uses

Bakery kitting
Cosmetics inner tray
Apparel presentation

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Retail presentation and sleeve trays

Inner tray for sleeves

This box slides smoothly into a custom sleeve, creating a drawer-style unboxing experience for cosmetics, confections, or small electronics.

Retail display kitting

The clean, folded top edges on the double walls present well on shelves, making it a natural fit for lightweight multi-item kits that do not rely on a sealed top.

Bakery and confectionary presentation

The clean edges and open top work well for baked goods or chocolates when wrapped in a secondary film or sleeve.

Apparel and soft goods

The smooth double-wall edges prevent snagging on fabrics, making it a practical choice for folded apparel kitting.

Hand-packing and short-run kitting

Manual fulfillment lines

Because it avoids folder-gluer routing, this tray makes sense for short runs and manual fulfillment lines where packers can quickly fold the walls into place without specialized equipment.

Short-run promotional packaging

When order volumes do not justify automated tray-forming equipment, this hand-erected style is easier to trial for limited promotional runs.

Multi-component retail kits

When several items sit together on a shelf without a closed lid, the double walls provide a finished look that elevates the presentation.

When to compare glued or mechanically locked trays

High-speed automated packing

If your line uses automated tray formers, a standard 4-corner glued tray is often easier to process than a friction-lock design.

Heavy or dense products

If the product weight might cause the friction lock to pop open during handling, compare this to a tray with mechanical base slots for added security.

Board thickness, crease clearance, and print surfaces

Board thickness and crease clearance

The double walls roll 180 degrees over the side tabs. If you specify a thicker board or micro-flute, the double crease (layer step crease) should be widened so the board does not crack or bow.

Two-sided printing needs

When assembled, the floor of the tray displays the back side of the paperboard, while the rolled-over inner walls display the front. If the entire inside should match, two-sided printing is worth comparing.

Friction lock security

Because this tray relies on board memory rather than mechanical base slots, heavier products or highly rigid boards might cause the inner walls to lift. Testing a physical sample helps confirm the fit.

Outer packaging pairing

This open-top tray is not meant for standalone transit. You should decide whether it will slide into a custom sleeve, sit inside a master shipper, or be shrink-wrapped for final delivery.

Side tabs, crease widths, and inner wall clearance

Side tab extension

The tabs that form the corners can be extended for more overlap along the width, provided they do not meet in the center of the tray.

Layer step crease width

The distance between the two parallel creases on the double wall can be adjusted to accommodate different board calipers, preventing tension when the wall rolls over.

Inner wall clearance

The rolled-over inner wall is typically slightly shorter than the outer wall so it clears the floor. This clearance can be adjusted based on the board thickness and folding behavior.

Packing details

Friction lock behavior and board memory

This tray relies entirely on the outward spring of the folded board to stay seated. Testing a physical sample with your exact board grade helps ensure the inner walls do not spontaneously pop up before the product is loaded.

Additional notes

Insert clearance for small parts

If you plan to use a custom insert, ensure it accounts for the slight inward curve of the rolled-over walls, which can reduce the exact internal footprint slightly compared to a glued tray.

FAQs

Does this tray require glue or tape to stay together?

The tray is designed to hold its shape without adhesive. The two double-thick walls roll over the corner tabs and press against the base, using the natural friction of the folded board to stay locked.

Will the inside of the tray be white?

The rolled-over inner walls will show the coated front of the board, but the floor of the tray will show the uncoated back. If you need a uniform white interior, you will need a board coated on both sides or two-sided printing.

Can I ship this tray through a parcel network?

Not on its own. It has an open top and the friction locks can dislodge during rough transit. It usually relies on an outer shipping box, a tight sleeve, or shrink wrap for courier delivery.

Can this be made from corrugated board?

It is primarily designed for folding carton board like FBB or SBS. While micro-flutes can work, the roll-over creases should be carefully adjusted to prevent the thicker material from cracking or bowing.

Is this faster to pack than a glued tray?

It avoids the manufacturing step of gluing, but it takes slightly longer for a packer to manually fold and lock the walls compared to popping open a pre-glued tray.

Why is a physical sample important for this style?

Because the lock relies on friction, a sample proves whether your chosen board thickness and stiffness will hold the walls down securely without popping back up.

How does the tray stay locked without base slots?

The inner walls fold 180 degrees and press against the floor of the tray. The natural outward spring of the folded paperboard creates enough friction to hold the walls in place.

Can I use this tray for heavy mechanical parts?

It depends on the exact weight and handling. Because it uses a friction lock, lifting a heavily loaded tray by the single-thickness walls might cause the lock to slip. A tray with mechanical base slots may be a safer choice for dense items.