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ECMA B44.20.00.00

4-Corner Glued 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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30+specialist partner plants

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Product details

Top highlights

  • Delivered flat with pre-glued corners
  • Opens instantly for fast loading
  • Double-thickness end walls provide rigidity

About this product

The 4-corner glued tray prioritizes speed. Delivered flat, it opens into a rigid tray because the corner tabs are permanently glued inside the double-thickness end walls during manufacturing.

This style trades a specialized factory gluing process for a major reduction in packing labor. It is a frequent choice for automated tray-forming lines, high-volume manual fulfillment, or as the base component for two-piece sliding boxes.

Common uses

  • Automated bakery and confectionery lines
  • Fast food and direct-loading environments
  • Base component for premium rigid-sleeve boxes
  • High-volume manual fulfillment where folding time is a bottleneck

Get a quote

Share what you know. We'll take it from there. Or email us at info@herculeindustrial.com

Best Price Guarantee

Already have a packaging quote? Let us beat it.

Send us the quote you have. We will beat it for the same specifications, quantity, and delivery requirements.

Upload a competing quote

Free quote review. No obligation.

30+specialist partner plants

We supply through the plant best suited to your price, material, production, and delivery requirements.

Why we can beat a lower quote

30+ plants give us more ways to lower the price.

Each plant has different machinery, material costs, order minimums, and freight rates. Our buying volume helps us secure better pricing. We then quote through the plant that gives you the lowest total price for your requirements.

Send us your current quote. Watch us beat it.

Attach it to the quote form or email it to us. We'll review it free and send you our price.

Upload a competing quoteinfo@herculeindustrial.com
Best Price Guarantee terms

To qualify, send a written supplier quote dated within the past 30 days and addressed to your company. It must cover the same dimensions, construction, material, print, finish, quantity, tooling, freight, delivery date, and delivery location. The guarantee does not cover taxes, expired quotes, liquidation or clearance sales, or obvious pricing errors.

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High-Speed Packing and Two-Piece Box Bases

Automated filling lines

This tray is often used for machine erection. A plunger pushes the flat blank through a die, snapping the glued walls upright in a fraction of a second before the product is loaded.

Base tray for sliding sleeves

When paired with a straight-tuck carton or open sleeve, this tray creates a premium two-piece presentation box often used for cosmetics, electronics, or confectionery.

High-volume manual packing

Even without machinery, packers can open this tray with one hand. It eliminates the time-consuming process of folding and locking friction tabs.

Retail display bases

The open top allows full product visibility on the shelf. It is frequently used as a base for shrink-wrapped multipacks or paired with a clear plastic lid.

Volume Fulfillment and Retail Bakery

Bakery and fast food

The open top allows for quick, direct loading of baked goods or fast food, while the glued corners ensure the tray does not collapse during handling.

Contract packaging and fulfillment

Operations that charge by the hour or piece benefit heavily from the instant setup, easily offsetting the specialized factory gluing.

Cosmetics and electronics presentation

Brands looking for a rigid unboxing experience often use this glued tray as the sturdy bottom half of a two-piece telescopic box.

Conditions That Point to Unglued or Webbed Trays

If packing labor is not the bottleneck

If you are packing short runs or have excess labor capacity, an unglued self-locking tray avoids specialized 4-corner factory gluing.

If packing fine powders or liquids

The standard glued corners leave small gaps. If leak resistance is a priority, a tray with webbed corners provides a continuous barrier.

Board Caliper, Erection Method, and Covers

Board thickness and fold clearance

Because the short walls fold 180 degrees over the corner tabs, the board thickness should be checked carefully. Thicker boards usually take adjusted crease spacing so the material does not crack or bind.

Automated versus manual erection

If you plan to use an automated tray former, the glue bond and board stiffness should be matched to the speed and force of your specific machinery.

Lid or sleeve pairing

Since this is an open tray, decide early if it will be shrink-wrapped, covered with a clear lid, or slid into a carton sleeve for final transit.

Flat delivery storage space

Despite acting like a rigid tray when open, it ships knocked down flat (KDF). This offers excellent pallet density compared to pre-assembled rigid setup boxes.

Wall Height, Tapers, and Crease Adjustments

Corner tab tapers

The internal tabs can be angled (tapered) to ensure they do not collide with the base creases when the tray is folded flat for delivery.

Wall height ratios

The tray can be configured as a shallow display base or a deep containment bin, provided the walls do not overlap when folded flat.

Layer step crease tuning

The distance between the parallel creases on the short walls can be widened to accommodate thicker corrugated flutes, ensuring the double wall lays flat.

Board and packing details

Stacking strength and wall bowing

Vertical stacking strength relies primarily on the double-thickness short walls. The single-thickness long walls provide containment but can bow outward if the tray is overfilled or subjected to heavy top loads without a rigid lid.

Wall-Thickness Variants

Single double-wall (B42.20.00.00)

Reduces board usage by reinforcing only one of the short walls, useful for specific display orientations.

Four double-walls (B48.20.00.00)

Folds all four walls over for maximum tray rigidity and a clean, premium rolled edge on all sides.

Additional notes

Factory gluing capabilities

Because the corners are glued while the blank is folded flat, this tray is typically run on a specialized 4-corner folder-gluer during manufacturing.

Flat delivery and storage space

The flat delivery state makes it much more efficient to store and transport than pre-assembled rigid setup boxes.

Related Tray Styles

B20.08.00.00: Unglued Self-Locking Tray

Worth comparing if you want to assemble the trays by hand using friction locks instead of relying on factory gluing.

B44.21.00.00: Webbed-Corner Glued Tray

Worth comparing if the tray is meant to contain powders or prevent minor leaks at the corners.

FAQs

Packing and Assembly

Is manual assembly involved?

Folding or locking is not necessary. The tray arrives flat and opens into a rigid shape instantly because the corners are pre-glued at the factory.

Can this tray run on automated equipment?

It is widely used on automated tray-forming lines where a plunger pushes the flat blank through a die to erect it at high speeds.

Comparison

Why choose a glued tray over an unglued friction-lock tray?

Speed. An unglued tray involves a packer manually folding and locking the walls into place. A glued tray opens instantly, saving labor time during fulfillment.

Materials and Print

Can I use corrugated board for this tray?

Corrugated board, typically E-flute or F-flute, can be used, but it takes careful adjustment. The short walls fold 180 degrees over the corner tabs, so the crease spacing should be widened to prevent the material from cracking or binding.

Shipping and Route

Is a lid used for shipping?

As an open-top tray, it provides no upper containment. For parcel or retail transit, it is usually paired with a sleeve, a lid, or packed inside a master shipping carton.

How is the tray delivered?

Despite being pre-glued, the trays are delivered knocked down flat (KDF). This offers excellent pallet density and takes up minimal warehouse space before use.

Materials and Print

What happens if I use a thicker board?

The layer step crease will be adjusted. This widens the hinge on the double-thickness walls so they can fold flat over the corner tabs without tearing the material.

Performance

Can this tray hold heavy items?

The double-thickness short walls provide good vertical stacking strength, but the single-thickness long walls can bow outward if the tray is overfilled. Heavy items may benefit from a rigid outer sleeve to keep the walls straight.