Clam shell packaging is one of the most common and reliable ways to package a variety of products. Clam shell packaging itself is usually rectangular in shape, although it can be more form fitting to better accommodate the product being packaged. Clam shell sealers (found here) are used to quickly seal clam shell packaging shut. The KF-772DH (found here) is one model you may want to consider using. This is my review.
Clam shell packaging has been around for years. Years ago it was almost always fastened shut using a stapler. It was found, however, that staples would eventually runs (looking bad) and that the staples could be easily pried open and products removed. There was also the issue of staples pricking fingers when packaging was opened. These are all reasons clam shell sealers came into being.
So how exactly does a clam shell sealer work? It’s actually fairly simple. Clam shell packaging opens up like a clam (hence the name). To keep the mouth of the clam shell packaging shut, it has to be sealed. Clam shell sealers use heat, or other methods, to melt the two halves together, sealing them shut. This is often referred to as plastic welding. Usually the packaging is sealed on the front and sometimes on the sides as well.
One advantage to a clam shell sealer is that there are no supplies involved, such as staples. Also, the packaging is very difficult to tamper with. If you have ever purchased something sealed with a clam shell sealer, you have probably had to use scissors to cut the plastic in order to access the contents. While a little annoying open, it is very secure and professional.
The KF-772DH is a direct heat (aka constant heat) clam shell sealer. This means it uses heat to literally melt the clam shell packaging. It comes equipped with a switch that can be toggled from low (250F / 120C) to high (350F / 175C). This allows the KF-772DH to be easily used with packaging made from OPS, PSP, PVS and EPC plastic cases. The sealing process really only takes a few seconds.
Here is a video demo of the KF-772DH in use:
While the sealing jaws on the KF-772DH do get very hot, the handles are insulated and cool to touch. Within the handle is a spring that returns the jaws to an open position after being used. A hook can be used to keep the handles in the closed position when the clam shell hand sealer isn’t being used. It works a lot like a handheld hole punch. It only weighs 10 ounces, so it is really easy to use repeatedly.
The weld produced by the KF-772DH is rectangular in shape. It measures in at 4mm x 10mm in size. This weld is extremely secure and from what I’ve seen it is just as secure and professional as what you would find with any other direct heat hand sealer.
While a lot has been put into this design to prevent injury, the operator should still try and keep their hands away from the jaw. I recommend you wait at least 30 minutes to ensure everything is properly cooled down before handling the serrated sealing jaws. A lot of the safety with this sealer involves some basic common sense.
I hope this review helps answer some of your questions. If you need some additional information, please feel free to give us a call at 1-800-658-8788. We can help answer your questions, take orders, provide replacement parts and much more. You can find the KF-772DH clam shell sealer here and our entire selection of clam shell sealers here.