THE DATA FRONT

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A Simple Solution to a Complex Problem There are two critical components to growing your bottom line — increased production and decreased cost. We , ve just given you a simple solution to a complex problem. We , ve also perfectly described what Martin Automatic rollchanging technology can do for you — increase production and decrease cost. Martin Automatic — problem solvers. Jim Ward Vice President/Engineering Martin Automatic Inc High Performance Splicing, Rewinding and Tension Control Systems www.martinautomatic.com Grow with Alprinta V. Alprinta V – The web offset press that sizes itself to the size of each job. The “V” stands for variable, and for versatility. Alprinta V is the web offset press that provides you with an infinite range of variable sizes. That makes Alprinta V perfect for the production of flexible packaging and labels. Win more applications and more customers by offering new substrates and new sizes. Alprinta V can handle it all, with speed and efficiency. You can even configure your Alprinta V to incorporate a variety of different printing processes, the better to meet the needs of your marketplace. Grow with the versatility – Grow with Alprinta V. Grow with us. www.mullermartini.com, Phone +41 (0)62 745 45 75
Labels&Labeling |109 changes and low operational costs,’ comments Jim Hammer, president of Hammer Packaging. ‘The Variable Sleeve Offset Printing technology helps us to both lower costs and increase the quality of our products. Our customers, companies like Coca Cola and Pepsi, are able to decrease their costs when they run rolls of labels and shrink sleeves on their own equipment. And the more we do in-line, the more freedom the designers get to create an attractive product.’ John Swain, principal of design company Packaging Arts, agrees: 'Hammer was able to assist us in migrating our labels seamlessly from cut & stack to roll-fed by using their Drent Goebel press. We also benefited by changing our printing process to hex or expanded gamut. It is nice to have a partner who stays ahead of the technology curve.' A high speed UV/WB flexo printing group was introduced for the VSOP at drupa. The web can be directed into a hot-air dryer and over the chill roller or directly over the chill roller with optional integrated UV lamps for curing. Another example of a wet-glue printer shifting to offset roll production is German converter Offsetdruckteam Witten GmbH (ODT). Two years ago, when the company was taken over by the Ellerhold Group, half its annual 20m euros sales came from wet-glue labels, mainly for the beverage industry. Responding to the beverage sector’s move to filmic roll labels and shrink sleeves, group managing director Frank Ellerhold invested in a Muller Martini Alprinta 74V variable-size web offset press. The 740mm-wide press has eight offset press units, a flexo unit and UV curing. It was originally specified with a Muller Martini offline sheeter, but this was later integrated into the press, along with in-line lamination and a hot air dryer. Frank Ellerhold maintains that variable-size web offset offers a cost-effective alternative to conventional flexo and rotogravure printing on small-to mid-size labels runs. ‘Here, the quality and the pre-press costs tipped the scale in favor of offset printing and the Muller Martini machine.’ ODT also uses the Alprinta 74V to produce wet-glue labels, as Ellerhold explains: ‘it can print 365 linear meters per minute, which equates to 20,000 sheets with a 3B machine.’ The size can be changed in just a few minutes. It is also possible to print and coat wet-on-wet using conventional printing inks. Offset mix and match An option for converters with platform flexo presses is to use interchangeable offset cassettes in the flexo press line. One converter which has adopted this approach is Skanem Introl in Poland, which last year installed a 10-color Gallus RCS 430 press specified with six flexo stations but equipped to accept offset as well as flexo units (along with two moveable cold foil stations). The offset printing unit can be deployed anywhere in the press and can be combined freely not only with flexo, but with screen printing, hot foil embossing and UV rotogravure. The RCS offset printing units incorporate individually driven inking and damping units. During the startup sequence the unit rotates at a makeready speed of just 1m/min to minimize waste. Ink and water profiles can be recalled for repeat jobs. Interchangeable offset units are also now available for the RCS330, along with UV rotogravure. Sticking to cassettes Not all offset press manufacturers have adopted sleeves for format changes. ‘To achieve a perfect match and drive of blanket and plate roller we believe that a cassette solution is still the best solution,’ says Eric Hoendervangers, MD of MPS, which – interestingly – developed its offset unit jointly with Drent-Goebel. ‘Cassettes allow us to “open up” all print towers to insert no-nonsense solid drop-in technologies for flexo, gravure, hotfoil and screen. These drop-in technologies last forever and perform also at high speed.’ MPS has retained its ‘solid lock’ technology for the offset change cassettes as well as its other drop-in technologies. ‘This prevents play in gear positioning and gear marking,’ says Hoendervangers. ‘No mechanical or software re-adjustment is required to get the modules up and running.’ Other technologies MPS has carried across to its offset units include the ‘Crisp Dot’ free running impression cylinder, claimed to eliminate changes in web tension between print units caused when the web is pulled through a driven impression cylinder. Omet is another manufacturer which has gone down the insert route, choosing interchangeable Nilpeter MO-4 may 2009 | L&L
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THE DATA FRONT

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