Standardizing Knives & Sealing Jaws on Flow Wrappers & Vertical FFS Baggers

You can use the same knife and sealing jaw designs across different models or makes of machinery to reduce costs, improve package quality, and decrease downtime.

Do you run different makes or models of flow wrappers or vertical form-fill-seal baggers? If you do, you probably use a variety of knife and sealing jaw styles that you need to keep in stock. With different knife or sealing jaw designs, the seal quality and appearance of your packages may vary, depending on which machine, line, or facility produced them. Read more

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When Cutting Issues Cause End Seal Leakers on Flow Wrappers

On horizontal flow wrappers, If you find that leakers only occur on the leading end seal of the package (made by the trailing sealing face of the jaws), a cutting issue is likely part of the problem.

When you have a problem with end seal leakers, looking for patterns can help you determine the cause and find a solution. . .
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Troubleshooting Checklist for Horizontal Flow Wrappers

Answers to the checklist questions will allow us to help define your problem, determine the causes, and develop solutions that restore package quality and productivity.

This Greener Corporation “Tech Bite” provides a Troubleshooting Checklist for working with us to solve packaging problems on horizontal flow wrappers. Answers to the checklist questions will allow us to help define your problem, determine the causes, and develop solutions that restore package quality and productivity.
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Repeatable Quality and Productivity


In this blog post and Tech Bites video we outline solutions to achieve repeatable quality and productivity on horizontal flow wrappers and vertical baggers across all production shifts, multiple packaging machines, and different plant locations.

In this blog post and Tech Bites video we outline solutions to achieve repeatable quality and productivity on horizontal flow wrappers and vertical baggers across all production shifts, multiple packaging machines, and different plant locations.
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Solving Cutting Problems on Flow Wrappers During Production

When cutting problems occur on horizontal flow wrappers during a production run, what are the best procedures to get packaging lines up and running again and to keep them running? Minimizing downtime, producing consistent quality packages, and managing costs require a balanced approach that includes:

  • Knowing which “quick-fix” adjustments will get knives cutting without causing additional problems and downtime. (Faster and easier is not always the best solution.)
  • Broad-based, P3 Solutions that consider the entire packaging process to:
  • Understand how each adjustment affects the whole system.
    Eliminate procedures that don’t work.
    Diagnose and correct the ultimate causes of problems. (Many issues stem from a combination of factors.)
    Implement solutions that help prevent cutting problems from occurring in the first place and help you Pursue Zero.

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Troubleshooting Extra Layers of Film at the End Seal (part 3 of 4): Optimizing Set-Up & Adjustment of Crimpers, Sealing Jaws, & Knives

The first two parts of this series explored the potential problems created by end seal wrinkles and creases and ways to eliminate or reduce them on horizontal flow wrappers (Part 1) and vertical baggers (Part 2). In some situations wrinkles or creases are unavoidable, and, even without those issues, most packages have the inevitable transition between multiple film layers created by either a fin or a lap seal.  This can make it more difficult to achieve quality seals, and attempts to do so can lead to additional issues:

 Excess pressure can easily crush or split the end seal.

 Overheating distorts the seal and can cause poor hot tack, where the film springs back open, or “moons,” before the seal can set.

The operating window for creating quality seals can be elusive, resulting in packages that leak or are distorted and either fail to protect the product or have little appeal to consumers.

This post reviews some of the detailed solutions in Greener Corporation’s Knowledge Center that will help you seal over extra layers of film at the end seal by refining the set-up and adjustment of crimpers, sealing jaws, and knives.

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Troubleshooting Intermittent Seal Quality Issues

When end seal issues such as leakers or splitting occur, an important initial step is to determine where, and how often, the trouble shows up. For problems that occur inconsistently—perhaps leakers on every other package, or splits only on the top or trailing end seals of the package—you need to determine if the bad seals show up randomly or according to a pattern. Do the problems occur on every package? On both ends of the package?

Start out by collecting a series of packages produced by the machine during production conditions. Number the packages sequentially and mark the machine flow direction. If you are working on a horizontal wrapper with multiple crimpers, label each pair (ex: A, B) and mark each seal according to the set of crimpers it came from. Now you can trace the problem seals back to the place they occur.

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Optimizing Knife and Anvil Set-Up on Horizontal Wrappers

Set-up procedures for knives and anvils can vary according to the make and model of the packaging machine, knife adjustment style, and other factors. There are, however, some general principles that make these adjustments more effective and efficient, reducing downtime and parts costs.


Diagonal Zig Zag Knife for Horizontal Wrapper_Greener Corporation
  Optimize Knife Design

  • Knives ground on a diagonal, or bias–whether they have a zig zag or a straight cutting edge–require less pressure to cut so they are easier to set up and typically last longer.
  • Zig zag knives with smaller (more) teeth are also easier to set up and provide longer life.

  Set Up the Crimpers First

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Clearance and Pressure on Horizontal Wrappers: What’s the Difference?

Greener’s latest “Tech Bites” video explains how proper clearance and pressure adjustments optimize horizontal flow wrapper performance.
Greener’s latest “Tech Bites” video explains how proper clearance and pressure adjustments optimize horizontal flow wrapper performance.

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Cleaning to Improve Package Quality & Productivity

The newest video in Greener Corporation’s “Tech Bites” series demonstrates the benefits of proper cleaning procedures for crimpers and sealing jaws on horizontal flow wrappers and vertical baggers.
The newest video in Greener Corporation’s “Tech Bites” series demonstrates the benefits of proper cleaning procedures for crimpers and sealing jaws on horizontal flow wrappers and vertical baggers.  

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