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ECMA C20.20.10.10

Truncated Pyramid Carton with Overlapping Flaps

Available in a wide range of custom configurations & material selection.
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Product details

Top highlights

Distinctive sloped walls for premium retail presentation
Full overlapping flaps must be secured externally
Delivered flat; often erected and sealed on automated lines

About this product

The ECMA C20.20.10.10 is a distinctive sloped-wall folding carton, often called a pyramid stub or conical box. It features full overlapping flaps on both the top and bottom, providing a clean, premium silhouette that stands out on retail shelves.

Because the overlapping flaps do not lock mechanically, this carton is typically secured externally during fulfillment. It is often chosen for automated packing lines where the striking shape justifies the specific handling approach.

Common uses

Cosmetics and perfumes
Confectionery and chocolates
Gift items and promotional sets

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Retail Presentation and Automated Packing

Cosmetics, Confectionery, and Gifts

The tapered shape draws attention and elevates the perceived value of the product inside. It is frequently used for perfume bottles, specialty chocolates, and promotional kits where shelf impact is the primary goal.

Automated Filling Lines

With full overlapping flaps on both ends, this carton is often erected, filled, and secured on automated cartoning equipment capable of handling conical shapes.

Promotional Kits and Limited Editions

The distinctive sloped profile breaks up the visual monotony of standard rectangular boxes on a retail shelf, making it a strong choice for seasonal releases or special product bundles.

Granular or Small-Part Packaging

The combination of minor dust flaps and fully overlapping major flaps creates a tight closure that helps contain granular items or small parts, provided the final seal is secure.

Display, Containment, and Production Environments

Retail Display versus Transit

This carton excels on the retail shelf but is not designed for rough handling. The sloped walls cannot support heavy vertical loads, meaning these cartons are usually packed inside rigid outer shippers for palletizing and transit.

Automated Sealing Environments

Because the top and bottom flaps do not mechanically lock, the packing facility must have equipment to secure the overlapping panels.

Sift Resistance and Containment

The full overlap on the major flaps provides a continuous barrier across the top and bottom openings, reducing the chance of small items slipping through the closure compared to standard tuck flaps.

When to Consider Tuck Flaps or Straight Walls

Manual Packing and Reusability

If the carton will be packed by hand or if the consumer needs to easily reclose the box, a tuck-in closure is often a better choice than overlapping flaps that must be secured externally.

Heavy Stacking Requirements

If the primary package will bear heavy top weight during storage or display, a standard straight-walled rectangular carton will provide far better vertical compression strength.

Closure, Artwork, and Board Choices

Closure Method

Determine how the top and bottom flaps will be secured. External sealing is used to keep the overlapping flaps closed during transit and display.

Artwork Projection

Because the walls are angled, standard rectangular graphics will appear distorted when the carton is erected. Artwork should be conically projected during the design phase to look straight on the finished box.

Board Selection

Thinner cartonboard provides a good balance of foldability and premium print surface. Thicker corrugated board is generally avoided because the angled creases are difficult to fold accurately.

Taper Angle and Base Dimensions

The severity of the slope affects both the visual impact and the folding behavior. Extreme tapers can cause the carton to bind when folded flat for delivery, so the top and bottom dimensions must be carefully balanced.

Taper and Flap Adjustments

Independent Top and Bottom Sizing

The dimensions of the top opening and the bottom base can be defined separately, allowing control over the exact angle and severity of the taper.

Side Seam Placement

The side seam can be adjusted in width to ensure a secure bond along the sloped side wall.

Flap Overlap Sequence

The template allows adjustment of which major flap folds first and which folds last, which can be tailored to match the specific folding equipment on the automated packing line.

Board and packing details

Manufacturing Considerations for Angled Creases

The trapezoidal blank shape and angled creases mean this carton does not travel through standard folding equipment as easily as a rectangular box. Converters often use specialized setups or slower run speeds to fold the side seam accurately.

Closure Variations

Reduced Flap Size (C20.20.11.11)

Uses shorter overlapping flaps to reduce overall board consumption while maintaining the same pyramidal body.

Additional notes

Outer Carton Fit

Because the top is narrower than the base, packing these cartons into a master shipper leaves empty voids. Alternate orientation (up/down) can sometimes improve packing density, depending on the closure seal.

Grain Direction

Board grain direction is carefully chosen to minimize bowing on the large trapezoidal panels while still allowing clean folds on the angled creases.

FAQs

Closure and Sealing

Does this carton lock closed on its own?

The full overlapping flaps on the top and bottom do not have mechanical locks or tucks. They rely on an external seal to stay closed.

Product Fit and Inserts

Can internal inserts work with a sloped-wall carton?

Designing inserts for a conical interior is more complex than for a straight-walled box. The insert is usually sized to wedge securely at a specific height within the taper.

Shipping and Route

Can these cartons be stacked on a pallet?

They should not bear heavy weight. The angled walls transfer vertical loads into bending forces, making them prone to buckling. They rely on a strong corrugated master shipper for transit and palletizing.

Print and Finish

How does the taper affect printed graphics?

Standard rectangular artwork will look warped when folded into a pyramid. The graphics are typically warped or conically projected in prepress so they appear straight and proportional on the final 3D shape.

Packing Labor

Is this suitable for hand packing?

While it can be popped open by hand, manually sealing the top and bottom overlapping flaps is slow and labor-intensive. For manual fulfillment, a tuck-in variant is usually preferred.

Samples and Prototypes

Why is a physical prototype important for this shape?

A prototype verifies that the taper angle isn't too extreme for the board to fold flat, confirms that the artwork projection looks correct, and allows testing of the closure method.

Board Choice

Can this be made from corrugated board?

The angled creases are difficult to fold accurately in thicker corrugated flutes, and the board thickness can interfere with the overlapping flaps. Thinner cartonboard is usually chosen.

Related Packaging

When should I switch to a tuck-in closure?

If the carton will be packed by hand, or if the consumer needs to easily reclose the box after opening, a tuck-in variant is a better choice than overlapping flaps that require external sealing.