I just want to Mark my Box!

by Toni Frost Marketing Coordinator Diagraph, An ITW Company

     Simple enough…I just want to mark the outside of my box. Looking for marking and coding equipment for a production line and haven’t a clue where to start? Now, ask yourself, where do I start, and the search begins.

     A big mistake most Original Equipment Manufactures (OEM) make is that they assume the customer/buyer looking to purchase equipment: know the industry, know the technical jargon and acronyms, and know what their options are. We can’t clarify every equipment dilemma; however we can simplify the process when it comes to large character marking and coding solutions.

     Let’s start with the basics, what’s being printed, marked or coded and what’s it being printed on? Large Character Printing is defined by character heights typically falling between ¼” to 4”. There are basically two large character ink jet technologies; Integrated Valve (I.V.), also known as Drop on Demand (DOD) and Impulse Jet (I.J.), also known as Piezoelectric High Resolution or Trident technology. The industrial marking and coding industry uses the term “inkjet technology” as a description when one deposits ink directly on substrates.

     Companies with production lines and a high volume of product moving through it will find their marking and coding solution in Integrated Valve (I.V.) series of print heads. Integrated Valve (I.V.) is a low resolution technology that precisely controls ink flow via powerful solenoids to a print head that perfectly forms ink drops, resulting in sharp, clean characters ranging from ½” to 2” in height. Marking at a print speed of over 650 feet per minute most manufacturing environments find that the I.V. system exceeds their minimum speed requirements.

     Integrated Valve is ideal for printing text, auto codes (such as product counts, time and date stamps) product identification and simple graphics onto porous (absorbent) and non-porous products as they travel by conveyor past stationary print heads. Some companies place multiple print systems throughout their production facility, marking on the product itself and/or the package it is shipped in.

     There are several major advantages with the Integrated Valve print head. Where print mobility is an issue the Integrated Valve print head offers 360 degree orientation, allowing for coding on the top, side and bottom of most substrates. Another advantage with the I.V. print head is the throw distance. Depending on the substrate (what its printing on) the distance away from what is being coded may be limited by size. With the Integrated Valve print head the throw distance is up to ½” accommodating even the bulkiest of product.

     Integrated Valve print heads are designed for high-speed printing applications in harsh environments using porous and non-porous inks. Created for the hashes environment, look for an I.V. print head that has an anodized enclosure which is environmentally sealed and a strong stainless steel front plate.

     Whereas Integrated Valve is perfect for printing, boxes, containers, and tray packs, it lacks the defined print quality necessary for bar codes and high resolution graphics. When looking for print speed and marking for identification purposes Integrated Valve (I.V.) is the ticket. For high resolution printing, Impulse Jet technology is the way to go.

So how does Integrated Valve work in laymen’s terms? Dots. Yes, a bunch of dots formed together perfectly to create a code that is marked onto your product.

     Not all marking and coding applications are alike. High resolution bar codes and company graphics often demand a more precise print quality. Companies looking for an all encompassed print solution that delivers their marking and coding requirements will find Impulse Jet technology their best bet. The Impulse Jet print head delivers the capability of printing high resolution bar codes, product identification, nutritional statements, descriptions, lot codes, and company logos. Impulse Jet technology supplies a voltage pulse to ink via piezoelectric crystals. Combining the voltage pulse with pressure the ink then flows to the print engine and into minuet holes which in turn produces small ink drops that form a code and is marked onto the product. The ink drops appear continuous and smooth with almost no imperfections which make it perfect for graphics. The result is a high resolution image that prints onto a porous surface.

     Impulse Jet print head options offer print height ranging from ¾” to 4” from a single print head and is often used in applications where more than one print head is utilized to create multiple messages on the same substrate. Don’t let the definition “large character” classification of the Impulse Jet print solution mislead you. Impulse Jet technology is capable of printing fine print nutritional fact statements and we know how small that print can be. As long as the graphic image does not exceed 4” the details of the image can be very defined.

     Whereas the Impulse head provides high resolution print quality, it will not deliver the same print speed as its large character counter part, Integrated Valve. Impulse Jet print heads however will run at over 200 feet per minute and taking into consideration the quality of the print, that’s not too bad. The throw distance is another variance between the two technologies. Due to the definition in print quality the Impulse jet delivers, the head can be no further away then ¼” from the substrate being printed.

     A direct cost savings is associated with the Impulse Jet print system. Cost savings can be found in the reduction of pre-printed inventory and shipping cartons. Imagine printing custom shipping cartons just in time, rather then taking up premium warehouse space.

     Another key feature to look for when choosing an Impulse Jet print head is an Automatic Cleaning System (ACS). Because of the smaller size of the ink nozzles, keeping them free of dust and debris is important. ACS removes dirt and debris from the face plate offering the added benefit of low maintenance and again saving the company time and money. Look for an ACS feature that allows manual initiation by pushing the purge button or better yet one that can be programmed to run at specified times.

     It is more the rule than not that a company will need to mark their products with various style, size and definition and therefore dual technology (using more than one type of print head) is necessary. Look for a manufacturer of marking and coding equipment that has designed an operating system that seamlessly integrates most print head technologies for your solution. This should be a common practice throughout the print industry however it proves to the contrary.

     The easiest way to remember what print technology you need for printing onto a box is: when looking for print speed and marking for identification purposes Integrated Valve (I.V.) will be the right choice for you. For high resolution printing, Impulse Jet technology will give you superior graphic perfection. For more information on the print head technology visit www.diagraph.com or call 1-800-526-2531.  

Learn More About Large Character Ink Jet