An L-bar sealer wraps a product in heat-shrink film and uses an L-shaped sealing bar to cut and seal the film around the product. After sealing, the wrapped product typically passes through a shrink tunnel, where controlled heat causes the film to contract tightly around the package.

The L-bar sealing process is as follows:

1. The product is positioned

The product enters the sealing area manually by an operator or automatically on a conveyor and is positioned beneath the film.

2. Shrink film is fed around the product

The film inverter creates an opening in the center-folded film, and the product is fed in the middle.

3. The L-bar comes down to seal the film

Two heated sealing bars form an L shape, cutting and sealing the film simultaneously.

4. The sealed package exits the sealer

After sealing, the product exits the L-bar sealer on a conveyor and moves to a shrink tunnel.

5. The package enters a shrink tunnel

The shrink tunnel, separate from an L-bar sealer, creates controlled heat to shrink film around the product.

---

What Is an L-Bar Sealer?

An L-bar sealer is a packaging machine that uses an L-shaped heated sealing bar to cut and seal shrink film around a product. L-bar sealers are commonly used with shrink tunnels to create a tight, professional package for products of various sizes and shapes.

The L-bar sealer utilizes:

• An L-shaped sealing mechanism – The vertical cutting motion of the PTFE hot knife delivers a consistent seal every time.
• Shrink film – L-bar sealers are engineered to run a wide range of polyolefin shrink films.
• Manual vs. automatic operation – L-sealer machines are available in manual, pneumatic, and fully automatic models to meet a range of production needs.
• Relationship to shrink tunnels – L-bar sealers are generally sold with a heat-shrink tunnel to finish the packaging process.

---

What Is an L-Bar Sealer Used For?

L-bar sealers are used for a variety of products and industries.

Most products consist of:

• Retail products
• Boxes and cartons
• Food and consumer products
• Printed materials
• Multi-packs
• Industrial products
• Products requiring protective or tamper-evident packaging

---

What Are the Main Components of an L-Bar Sealer?

L-bar sealers generally contain the following features:

• L-shaped sealing bar
• Film carriage/film roll
• Pin Perforator
• Product conveyor
• Sealing mechanism
• Film handling system
• Safety features
• Controls

---

Manual vs. Automatic L-Bar Sealers

Eastey builds both manual and automatic L-bar sealers.

Eastey manual L-bar sealers include performance, professional, and pneumatic models engineered for fast, reliable, and durable shrink packaging. Built for consistent sealing and long-term operation, these systems deliver professional-quality results in demanding production environments.

Eastey automatic L sealers are designed for heavy-duty industrial shrink wrap sealing and feature self-centering seal systems for precise, consistent performance. Built for demanding production environments, these automatic L-bar sealers deliver high-speed throughput, reliable operation, and professional-quality shrink packaging results.

---

How Do You Choose the Right L-Bar Sealer?

The most important questions to ask yourself when purchasing an L-bar sealer for your production line include:

• What are the product dimensions?
• How many products need to be packaged per minute?
• What type of film will be used?
• Is the operation manual or automated?
• What sealing-bar size is required?
• Is a shrink tunnel needed?
• What space is available on the production floor?

Please reach out to us at Eastey; our experienced staff can walk you through the purchasing process and help you find the right solution.