ILS Impulse Wire

L-Bar Sealers

Belco L-Sealers feature a welded tubular steel frame and sealing head design to maintain perfect alignment during the sealing process. This unique construction is superior to conventional assemblies that are simply bolted together.  This manufacturing process provides consistently strong seals, long machine life and years of trouble-free performance. 

Belco Impulse Wire sealing technology employs a single Nichrome wire to create the front seal and side seals around your package. During the Sealing Cycle, the wire temperature is controlled by the Seal Wire Heat Adjust for a fixed amount of time which is regulated by the Impulse Timer. A Sealing Wire Sensor monitors the heat buildup in the wire so overheating and wire breakage during the sealing cycle is prevented. For the larger sealers and custom sizes, individual Seal Wire Heat Adjust controls for the front seal and side seal are used. An Impulse/Constant Heat switch allows the operator to choose which sealing method is best for the particular film being sealed.

Belco L-Sealers come in a variety of sizes and styles to help you package your product in a quick and efficient manner.


All film manufacturers require sealing machines to control the same three variables in order to make their film seal: Time. Temperature and Pressure. For 60 years. Belco L-Sealers have easily met and surpassed these demands while producing fast. clean. and repeatable seals. 

Available Models

ILS2016    ILS2520    ILS3022    ILS4030    ILS5030    ILS5016    ILS8442    

Optional Features:

- Magna-Lock sealing system

- Air operated sealing system

- Product take-away conveyor

- Powered film unwind

- Inverting heads

- Multi-perforator hole punches

- Stainless steel construction

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Standard Features:

- Welded tubular steel frame and sealing head (with a 5 year warranty)
- Adjustable aluminum in-feed table with film opening horn
- Independent seal wire heat adjust and impulse timer
- Impulse or constant heat seal mode
- Sealing wire sensor prevents overheating
- Fused electrical protection
- Reversible seal base rubber and Teflon: no tools or tape required

- Adjustable Tilt Table/Conveyor

- Heavy duty locking casters with leveling pads

The sealing operation is safe, fast and reliable. Simply place your product into the centerfold of film, advance both film and product into the seal area and lower the sealing arm. Upon completion of the heat seal cycle, the arm will return to the up position, leaving your product fully wrapped. 

Download the 2019 Belco Industrial Brochure

Features & Options

Popular Optional Configurations

Power Film Unwind

This motorized film cradle feeds film to the operator upon demand as the package is advanced into the seal area. Regardless of how fast the operator or how long or small the product size, this option can maximize production speeds while minimizing operator fatigue.

Adjustable Film Inverting Head

By Turning film inside out in a 90 degree manner, an in-line packaging operation can be created to significantly increase production flow, lessen product handling and increase operator efficiencies.

Hole Punches

Air evacuation devices allow excess air to escape the bag during the shrink process. Several styles are available to best fit your machine and application; Pin Wheel, Thermal, Air and Multi-Perforator

Custom Color

Belco can custom powder coat paint your machine to match your company colors or production floor requirements. Just supply your RAL paint specification along with your request for machine quote.

Magna-Lock Sealing Arm Systems

(For semi-automatic operation, choose either the Magna-Lock or Air-Operated Seal Arm with the optional Product Take-Away Conveyor.) Powerful magnets hold down the seal arm to provide semi-automatic operation and even seal pressure along the entire seal base. The adjustable timer provides the correct dwell time necessary to ensure consistent, strong, quality seals. This level of automation reduces operator fatigue while increasing production speeds.

Air-Operated Seal Arm

(For semi-automatic operation, choose either the Magna-Lock or Air-Operated Seal Arm with the optional Product Take-Away Conveyor.) This seal arm control system uses your facility’s air pressure to create repeatable, strong seals every cycle. Belco incorporates dual Opto-Touch (zero force) start switches which are ergonomically designed to eliminate hand, wrist and arm stress for your operator. The results are increased efficiencies and greater output at the end of each shift for your packaging operation.

Product Take-Away Conveyor

Once the seal is complete, the arm raises and the product is transferred out of the sealing area. An adjustable timer controls how long the conveyor moves the product, either all the way out of the seal area, or just far enough to make the next package.

Stainless Steel Construction

The Belco line-up of equipment is also offered in stainless steel construction for use in Pharmaceutical, Food, Meat, Fish and Poultry processing environments. They comply with FDA and USDA requirements for packaging your product. These are wipe-down rated machines and not designed for washdown cleaning.

How To Choose

Which Belco ILS is right for you?

Belco manufactures manual and semi-automatic L-bar heat sealers capable of running production speeds of 5 to 25 packages per minute. This represents 500,000 to 2,500,000 packages per year, based on an 8 hour day, single shift operation. The Impulse Models ILS 2016, ILS 2520, and ILS 3022 use a single nichrome element wire to create both the front and side seals. Set up is accomplished with the simple adjustment of the wire temperature and the impulse time controls. The Impulse Models ILS 4030, ILS 5030, ILS 5016, ILS 8442, and Custom sized sealers control the front and side seal wires independently with dedicated heat controls. In this way, wire temperature can be adjusted specifically for the package size. Hot Knife sealing technology is available on all Belco sealing equipment. This system uses cartridge heaters, thermocouples and Watlow digital temperature controllers to precisely monitor the side seal and front seal temperatures. Product changeovers and setups are exact and repeatable. Hot Knife inserts allow for simple maintenance and sealing of all shrink films.


The first consideration is the size range of packages you need to wrap. Low profile packages can fit in seal areas that are much closer in size to your actual package length and width. Taller packages will require larger seal areas.
Seal capacities range from 20" Long x 16" Wide up to 84" Long x 42" Wide for our standard sealer line. Specific matching shrink tunnels are available to complete your shrink packaging system. Custom sized sealers and tunnels are available to meet your requirements.
Please feel free to contact your Belco sales representative or local distributor for a machine recommendation based on the maximum length, width and height of your product.


Do your packages include irregularly shaped designs? Will you be sealing multi-packs, high profile cube boxes or cartons? If so, you may want to consider Belco's optional features to enhance your system. Your operator will spend less time preparing and handling the product and you will realize more productivity.


Do you require medium or high speed productivity? You should consider how many packages you need to produce to meet peak demands as well as satisfy regular production schedules. Hot Knife sealing technology can dramatically increase your daily production output.


Belco offers specific options that can be added to your ILS sealer to help meet production requirements and enhance productivity. Popular options include: powered film unwind, adjustable inverting head, air-operated seal arm, Magna-Lock hold down system and product take-away conveyor.


The Belco Impulse L-Sealers have two items to maintain: the seal base rubber and the Teflon protective strip. Both are reversible for long life and an operator can perform the change without the need for tools, parts or service technicians. Belco Hot Knife L-Sealers are built to be even more robust than our popular Impulse wire sealers. The machine operator only has one item to maintain: the seal base rubber. All other machine parts are designed for long life and require little attention. Belco machines are built to last so simple, preventative maintenance will ensure years of dependable performance.


Main Power Switch

Turns On/Off the power to the entire machine. Maintains all previously set sealing parameters to ensure rapid start up and consistent quality seals at the beginning of your next shift.

Constant and Impulse Heat Sealing

This switch allows the operator to choose between constant hot wire sealing or impulse heat sealing where the wire only gets hot when the seal arm is cycled.

Impulse Time

This time control monitors how long the element wire gets hot.

Seal Wire Heat Adjust

Includes "constant" and "impulse" heat sealing. This control determines how hot the seal wire will get, allowing for maximum production speeds.

Sealing Wire Sensor

This unique switch prevents the sealing wire from overheating during the seal cycle. By sensing the correct seal wire temperature, fast, clean seals are obtained. You can expect longer seal wire life and reduced wear and tear to the sealing head assembly with this proven Belco system.

Film Cradle

This heavy duty film cradle has adjustable side guides to position the film for each package width. A film unwind brake prevents overfeeding of film during the packaging operation. No tools required.

lnfeed Tray

For standard feeding of product, an aluminum infeed tray with film opening horn is provided.

Seal Arm Guards

These guards clamp the film in an even and positive manner to reduce film tension and ensure quality seals during the sealing process.

Quick Change Bottom Teflon Clamps

Magnetic clamps allow your operator to quickly change and maintain the bottom seal sponge and Teflon. In addition, it allows for flipping and reversing both of these normal wear items to prolong their life and lower your operating costs.

Adjustable Tilt Table/Conveyor

The product sealing table or optional take-away conveyor can be raised, lowered or tilted to allow smooth transfer of your product out of the seal area.

Locking Casters and Leveling Pads

Move your Belco L-Sealer to wherever the job is or level it and leave it in your production line. The choice is yours.

Welded Frame

Belco ILS's are built to last. You can depend on years of trouble-free production. All Belco L-Sealers start with the same premise, a heavy wall tubular steel welded frame. Solid. . . nothing to loosen. . . nothing to become misaligned and cause unnecessary wear and downtime.


Mechanical (Pin Wheel) Hole Punch

This device perforates one row of pinholes spaced approximately 1-inch apart as the shrink film unwinds from the roll. *Not available for use on Inverting Head systems.

Multi-Perforator Hole Punch

Belco's most popular air evacuation device allows excess air to escape the sealed bag during the shrink process. This device perforates a 3-row series of pinholes across a 1½" wide area of the shrink film as it unwinds from the roll. *ILS 2016 and 5016 units comes complete with one wheel and safety guard.
*ILS 2520 and 3022 units come complete with two wheels and safety guard. *ILS 4030 and 5030 units come complete with three wheels and safety guard. *ILS 8442 unit comes complete with four wheels and safety guard.

Additional Multi-Perforator Wheel

Adding more perforator wheels provides additional air evacuation for larger packages.

Thermal Hole Punch

A hot iron assembly burns a single air evacuation hole in the top sheet of the center-folded shrink film. Not available for use on Inverting Head systems.

Air Hole Punch (Air-Operated sealers only)

This device is pneumatically activated and provides a 5/16" diameter air evacuation hole into the film every time the seal arm cycles.

Easy-Open Perforator System

This device creates a perforation line in the shrink film which allows the customer to easily split the film and gain access to the package. No additional materials are required.

Inverting Head Hole Punches

Air evacuation devices come in two different styles to best fit your machine and application. See descriptions above for air or multi-perforation hole punches.

Inverting Head Dual Air Hole Punch (Air-Operated Sealers Only)

Provides dual air evacuation vents 10" apart across the film web width. This device is pneumatically activated and provides two 5/16" diameter air evacuation holes into the film everytime the seal arm cycles.

Foot Pedal Assist

This device is for heavy or awkward packages. Press the foot pedal to activate the product take-away conveyor and help move product from the infeed table into the seal area.

Product Take-Away Conveyor Time Delay

This option allows Polyethylene seals to "set" before the Product Take-Away Conveyor moves the package out of the seal area. Always recommended for Polyethylene sealing.

Stainless Steel lnfeed Trays

Designed for food or medical applications. This all stainless steel infeed tray replaces the standard aluminum tray.

Sealer/Tunnel Adjustable Spacer Set

This option properly spaces and locks a Belco Sealer and Tunnel to minimize the risk of one machine moving into or away from the other.

Heavy Package Handling Option

The standard infeed tray or film inverting head system is replaced with a heavy duty roller infeed to help the operator package heavy or difficult to handle products. Additionally, the standard product take-away conveyor is replaced with a belt-over-roller table. *Quoted only after Belco Engineering has evaluated the project.

Other Options Available?

We're interested in any application built around a standard Belco Packaging machine. Please consult with the factory.

Export Crating Available

International shipments require special handling.

Factory Acceptance Tests Available

Customers are welcome to visit the factory to test run their machines before shipment.

Spare Parts Kits

Recommended with all machinery purchases.

Extended Depth Take-Away Conveyor

The product take-away conveyor can be adjusted to accept up to a 10" high package.

Hydraulic Controls for Take-Away Conveyor

Dual handle hydraulic controls quickly adjust the take-away conveyor depth for use with heavy products.

Film Trim Take Up System

Improve the efficiency of the operation by having the integrated scrap Film Trim Take-Up System installed on your machine. The trimmed film from each package is neatly guided onto a motorized take-up reel and kept off the floor and away from the operator’s work space. Every time a new roll of film is put onto the machine, remove the tightly wound trim roll for easy disposal.

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