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ECMA A60.01.00.00

Open-Top Crash-Lock Carton

  • 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

  • Fast bottom assembly via pre-glued crash-lock mechanism
  • Open top for unobstructed product access
  • Relies on an outer shipper for parcel or courier transit

About this product

The open-top crash-lock carton is a fast-erecting sleeve or base used for rapid packing. By pushing the opposite corners of the flat blank, the pre-glued bottom interlocks into place, creating a flat floor quickly.

Because it lacks top flaps, this carton is typically used as an inner sleeve, a display base, or a component tray inside a larger master shipper. It provides immediate top access to the product but relies on outer packaging for transit protection and vertical stacking strength.

Common uses

  • Inner sleeves for bottles
  • Display bases for retail
  • Component trays inside master shippers

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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.

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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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Inner Sleeves, Display Bases, and Component Trays

Inner Sleeves for Bottles and Tubes

The open top allows tall, slim products to be loaded quickly and remain visible or accessible. The crash-lock base provides a flat, stable floor, keeping the items upright inside a larger retail display or master shipper.

Two-Piece Setup Bases

This package frequently serves as the bottom tray in a two-piece setup, where a separate lid or slipcase slides over the open top. The automatic bottom speeds up the initial staging before the product is inserted.

Component Trays for Master Shippers

Used to group smaller items inside a larger transit box, providing a floor that keeps components organized without adding top flaps that would slow down unpacking.

Open-Top Retail Display Bases

Acts as a quick-erecting base for shelf displays where the product needs to remain visible and accessible immediately after the outer transit packaging is removed.

Retail Kitting, Assembly, and High-Volume Fulfillment

High-Volume Fulfillment Lines

When packing labor is the primary bottleneck, the crash-lock bottom eliminates the time spent manually folding base flaps. Operators can square the carton and drop the product in a single motion.

Retail Kitting and Assortment Packing

For kits that need multiple components to be grouped together before being placed in a master box, this open-top sleeve keeps items organized without adding the bulk of top flaps.

Multi-Part Product Assembly

When a product needs a temporary holding base during assembly or staging, the fast-erecting floor provides immediate stability before the item moves to the next packing stage.

When to Consider a Full Enclosure or Snap-Lock Base

Standalone Parcel or Courier Shipping

This carton provides no top-side retention. If the package will be shipped individually through a courier network, compare it to a full tuck-top auto-bottom carton (A60.20.00.03) to ensure the product is enclosed.

Short Digital Trials or Prototypes

The crash-lock bottom relies on a multi-point gluing process. For very short runs or prototypes, a snap-lock bottom (A55.01.01.00) avoids this specific production step, trading it for slightly slower manual assembly.

Board Stiffness, Grain Direction, and Outer Packaging

Board Stiffness and Top Splay

Because there are no top flaps to hold the opening square, the vertical walls are prone to bowing outward. Selecting a stiffer board grade helps maintain the rectangular shape.

Grain Direction for Wall Stability

Running the paperboard grain horizontally (perpendicular to the main vertical creases) provides necessary stiffness to keep the panels flat without the help of top flaps.

Production Path and Run Size

The efficiency of the crash-lock bottom pays off at scale. Buyers should weigh the multi-point gluing preparation against the labor savings on the packing floor.

Outer Packaging Strategy

Since the top is open, buyers should decide how the carton will be protected during transit, usually by pairing it with a master shipper or a tight-fitting outer sleeve.

Adjusting Clearances, Profiles, and Glue Flaps

Crash-Lock Clearances

The internal interlocking tabs can be adjusted to reduce binding during erection. Heavy products may need modifications to the diagonal fold angles to ensure the floor seats flat.

Base Profile Modifications

The geometry of the interlocking bottom flaps can be adapted for different product weights, ensuring the base remains stable when the carton is lifted.

Glue Flap Adjustments

The side glue flap width and angle can be modified based on the chosen board thickness to ensure a clean, consistent side seam.

Board and packing details

Flat Delivery and Storage Bulk

These cartons are delivered knocked down flat (KDF). The folded diagonal creases of the crash-lock bottom add localized thickness, meaning fewer flat cartons may fit in a standard shipping case compared to straight-line glued sleeves.

Base Style Options

Inverted Orientation

In rare dispensing applications, the package can be inverted (A01.60.00.00), placing the open aperture at the bottom and the crash-lock mechanism at the top.

Additional notes

Base strength for heavy items

The interlocking bottom flaps bear the primary weight of the product. For dense or heavy items, the board caliper and the accuracy of the glue points should be validated to reduce the risk of the bottom sagging or dropping out.

Board thickness and fold memory

Using thicker board or micro-flute corrugated for crash-lock bottoms can create bulky diagonal folds that resist laying flat. This fold memory should be tested to ensure the carton erects smoothly on the packing line.

Related Packaging to Compare

A60.12.00.03: Open-Top Sleeve with Reduced Flaps

Includes four reduced top flaps that fold inward, providing a partial top frame to help keep the carton square.

FAQs

Product Fit and Assembly

Does the open top affect the carton's stacking strength?

Yes. Without top flaps to brace the corners, the vertical walls can rack or bow under heavy top loads. This carton is usually supported by an outer master shipper if vertical compression is expected.

How fast is the assembly compared to a snap-lock bottom?

A crash-lock bottom erects quickly when the opposite corners are pushed inward. A snap-lock (1-2-3) bottom involves manually folding and interlocking separate flaps, taking more time per carton.

Quantity and Production

Why does the production path differ from a standard sleeve?

The crash-lock mechanism relies on a folder-gluer machine to fold the diagonal creases and apply adhesive to two bottom points, in addition to the standard side seam. This multi-point gluing process takes more preparation than a simple straight-line carton.

Route and Shipping

Can this carton be used for ecommerce shipping?

Not on its own. The open top leaves the product exposed and vulnerable to falling out. It typically needs an outer mailer or shipping box for courier transit.

Board and Finish

What helps keep the side walls from bowing outward?

Proper board selection and grain direction are critical. Running the paperboard grain horizontally provides the stiffness needed to keep the panels flat without the help of top flaps.

Related Packaging

When should I switch to a full tuck-top carton?

Switch to a full tuck-top (like the A60.20.00.03) when the product needs dust protection, when the carton will be handled individually outside of a master case, or when you need the top flaps to help square the box.

Quantity and Production

Can this carton be erected by automated machinery?

Yes, the ECMA M/A setup label indicates it can be erected manually or by automated cartoning equipment, though the specific machinery should be capable of handling open-top squaring.

Route and Shipping

How does the flat delivery affect storage?

These cartons are delivered knocked down flat. The folded diagonal creases of the crash-lock bottom add localized thickness, meaning fewer flat cartons may fit in a standard shipping case compared to straight-line glued sleeves.