John Henry

United States

Contributor at Packaging Digest

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Articles

How to Add Perforations to Flexible Packaging and Why

2 weeks ago | plasticstoday.com | John Henry

Flexible packaging films are generally impermeable. Some add multiple layers to guarantee this. Impermeability is not always a good thing. Take a carton with a six-sided shrink wrap. As the film is sealed, it traps air inside. When the film tries to shrink, if the air can’t escape, it forms a pillow. Perforations in the film let that air out. There are several ways to add holes to film. Pinwheels are a simple method. The film passes over the pinwheel between unwind and forming stations.
Here’s Why Drug Costs are So High

2 weeks ago | packagingdigest.com | John Henry

Prescription drugs cost a lot in America. The reasons are complex. Drug development requires massive upfront investment, and each dose must cover these costs. Packaging adds another layer of expense. It all makes more sense when you see the whole picture. Pixelimage / iStock via Getty Images Plus“Prescription drugs cost too much.” We hear that all the time. Many medications are expensive — but compared to what?
How to Add Perforations to Flexible Packaging and Why

3 weeks ago | packagingdigest.com | John Henry

Perforated packaging solves common problems: It allows air to escape from shrink-wrapped products; it prevents microwaveable pouches from exploding. Various methods create these essential holes. Choose the right technique for your packaging needs. Stely Nikolova / iStock via Getty Images PlusAt a GlancePerforations allow air escape in shrink wrap and steam release in microwaveable pouches, preventing defects and explosions.
How Security Seals Protect a Container’s Contents

1 month ago | packagingdigest.com | John Henry

John R. Henry, Changeover.comWe’ve all been there. Take the cap off a bottle and we find a paper, plastic, or foil inner security seal. Many have pull tabs but, even so, they can be hard to remove and we may wind up using a fork or knife to cut it. These are “security seals” because they make it difficult to tamper with the product without leaving evidence. For many bottles, they are the primary seal. The cap is there for reclosability and to protect the seal on its way to the end user.
Mastering Screw-Cap Torque in Packaging Machinery

2 months ago | packagingdigest.com | John Henry

Discover how various clutch mechanisms in screw-capping machines work together to achieve the perfect balance of closing and opening torque for optimal package integrity and consumer satisfaction. Screw-caps must be Goldilocks: Not too loose, not too tight, but just right. The capper must apply just the right amount of closing torque to ensure proper opening torque. Whether the capper uses a centered chuck or spinning side wheels, the clutch is key to getting this torque right.
Do You Know Your Crimp Cappers?

Jan 15, 2025 | packagingdigest.com | John Henry

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We Need More of These Automation Solutions

Dec 11, 2024 | packagingdigest.com | John Henry

From robots and cobots to RFID and specification systems, useful packaging technologies dominated at Pack Expo 2024. Another year and the biggest Pack Expo ever is in the bag. I tried to walk the entire show but probably only saw about 75% of it. What I did see was spectacular. Here are a few things that grabbed me:• I’ve long been saying that packaging machine builders go at robots backwards. The robot should be the basis of the machine rather than an add-on to a legacy platform.
How Roll On Pilfer Proof Cappers Work

Oct 28, 2024 | packagingdigest.com | John Henry

alenkadr via iStock/Getty ImagesThe Roll On Pilfer Proof (ROPP) cap is not quite a screw cap but not quite a crimp cap either. It’s a hybrid of the two. It is often used on glass bottles, especially wine and spirits. It can be used on plastic and metal bottles as well. Applying it requires quite a bit more downforce than a regular screw-on cap. If the bottle is not rigid enough, it may be possible to design a support ring into the bottle and a neck support on the capper.
An Inexpensive Way to Wrap Packages

Oct 24, 2024 | packagingdigest.com | John Henry

Itsanan Sampuntarat / iStock via Getty Images PlusSometimes you want a good looking six-sided wrap but don’t want to spend a lot of money. An L-Bar sealer may be the solution for you. L-Bar sealers can be completely manual to fully automatic, with varying degrees of automation in between, depending on budget and production requirements. Other shrink wrappers use a single layer flat film. L-Bar sealers use a film folded lengthwise on the centerline to form two layers.
The Precision Power of Bent-Axis Filling Pumps

Aug 28, 2024 | packagingdigest.com | John Henry

Sometimes you need to precisely dispense or fill liquids in extremely small quantities. Fill volumes can range from a few milliliters down to a few dozen microliters. The typical piston filler is difficult to control precisely at these volumes. Bent-axis pumps convert the rotary motion of a servomotor to reciprocating linear motion without using a crank. They get their name because the axis of the motor is bent in relation to the axis of the piston.