1. Introduction
This manual provides essential information for the safe and efficient operation of your Fellowes Neptune 3 125 Laminator. Please read these instructions thoroughly before initial use and retain them for future reference. This laminator is designed for office and home use to protect and enhance documents up to 12.5 inches wide.
2. Important Safety Information
- Always connect the laminator to a properly grounded 120V AC power outlet.
- Do not operate the laminator if the power cord or plug is damaged.
- Keep hands, hair, and loose clothing away from the feed opening during operation.
- Do not attempt to laminate metal objects or items thicker than recommended pouch specifications.
- Unplug the laminator when not in use or before cleaning.
- Ensure adequate ventilation around the machine during operation.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
3. Package Contents
Upon unpacking, please verify that the following items are included:
- Fellowes Neptune 3 125 Laminator
- Instruction Manual (this document)
- Starter pack of laminating pouches (may vary by region)
If any items are missing or damaged, please contact Fellowes customer support.
4. Product Overview
The Fellowes Neptune 3 125 is a high-performance laminator designed for efficient and professional document protection. It features a 12.5-inch entry width, accommodating various document sizes up to letter size, and utilizes a 4-roller system for high-quality lamination.

Image 1: Front view of the Fellowes Neptune 3 125 Laminator, showcasing its sleek design and document entry slot.

Image 2: The Fellowes Neptune 3 125 Laminator as it appears in its protective packaging.
5. Setup
- Unpack the Laminator: Carefully remove the laminator from its packaging and place it on a stable, flat surface. Ensure there is sufficient space around the machine for proper ventilation and document feeding/exit.
- Connect Power: Plug the power cord into a standard 120V AC electrical outlet.
- Power On: Press the power button, usually located on the control panel. The laminator will begin its warm-up cycle.
6. Operating Instructions
- Warm-up: After powering on, the laminator will typically indicate its warm-up status (e.g., a flashing light). Wait until the indicator light signals that the machine is ready for use (e.g., a solid green light). This usually takes a few minutes.
- Prepare Document: Place your document inside a laminating pouch. Ensure the document is centered and there is an even border of the pouch around all edges. Do not overfill the pouch.
- Select Pouch Thickness (if applicable): Some laminators have settings for different pouch thicknesses. Refer to your laminator's control panel for specific options. The Neptune 3 125 often automatically detects pouch thickness or has simple controls for common thicknesses.
- Insert Pouch: Feed the sealed edge of the laminating pouch straight into the laminator's entry slot. Ensure it is inserted evenly and not at an angle. The laminator will automatically pull the pouch through.
- Lamination Process: Allow the laminator to complete the process. Do not pull or push the pouch during lamination.
- Remove Laminated Document: Once the pouch exits the machine, carefully remove the laminated document. It may be warm, so handle with care. Place it on a flat surface to cool and flatten.
- Power Off: After use, press the power button to turn off the laminator and unplug it from the power outlet.
7. Maintenance
- Cleaning: Ensure the laminator is unplugged and completely cool before cleaning. Use a soft, dry cloth to wipe the exterior. For stubborn marks, a slightly damp cloth can be used, but ensure no liquid enters the machine.
- Roller Cleaning: Periodically run a laminator cleaning sheet (available separately) through the machine to remove adhesive residue from the rollers. This helps maintain lamination quality and prevents jams.
- Storage: Store the laminator in a clean, dry place when not in use.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Laminator does not turn on | No power; power cord not fully inserted. | Check power connection and wall outlet. Ensure power button is pressed. |
| Pouch jam | Pouch inserted crooked; pouch too thick; adhesive residue on rollers. | Press the reverse/release button (if available) to eject the pouch. If not, turn off and unplug, then carefully pull the pouch out. Use cleaning sheets regularly. |
| Poor lamination quality (bubbles, cloudy) | Incorrect temperature setting; old pouches; document not flat. | Ensure correct temperature/pouch thickness setting. Use fresh, high-quality pouches. Ensure document is flat before lamination. |
| Laminator is slow to warm up | Normal operation; cold environment. | Allow sufficient time for warm-up. Ensure operating in a room temperature environment. |
9. Specifications
- Model: Neptune 3 125
- Item Model Number: FELLOWES 5721401
- Brand: Fellowes
- Entry Width: 12.5 inches
- Number of Rollers: 4
- Power: 120V AC
- Product Dimensions: 22.6 x 9.8 x 7.3 inches
- Item Weight: 13.68 pounds
- Sheet Size Compatibility: Up to Letter size (and wider documents up to 12.5 inches)
10. Warranty and Support
For warranty information, please refer to the documentation included with your product or visit the official Fellowes website. Fellowes provides customer support for product inquiries, troubleshooting, and parts. You can typically find contact information on the Fellowes website or through your retailer.
Visit the Fellowes Store for more products and information.





