Advantages of Web Printing in Sheetfed Offset, Heidelberg CutStar Sheeter
Press release from the issuing company
Heidelberger Druckmaschinen AG (Heidelberg) demonstrates one of its many sheetfed solutions at Print 01 with the CutStar sheeter, a unit that is perfectly tuned to the needs of the Speedmaster SM/CD 102 series. The infinitely adjustable sheet cutting length and high reliability in operation for stocks between 30 lbs book stock and 110 lbs cover stock weight sets the CutStar apart from other systems.
Reel material offers printers potential savings of up to 20 percent over sheeted paper. Other cost-effective benefits of the CutStar lie in the ability to infinitely adjust sheet-cutting lengths to exact required measurements and to increase net productivity through highly reliable sheet feeding. This applies especially to lightweight papers and special printing stocks such as foils and aluminized paper. These benefits offer printshops more freedom in cost calculations by saving costs through increased productivity and lower pricing on materials.
The CutStar is installed in the press extension ahead of the sheet feeder and is bolted to the floor. This eliminates the need for costly rail structures, often used with other models, which can damage the structure of a floor. During the development of the CutStar, Heidelberg paid particular attention to provide the best solution to its customers through ease of use and maximum reliability in production.
With the CutStar, the web is drawn over the nip rollers and dancer rollers to the cutting unit, which consists of a rotating upper knife cylinder and a fixed lower knife. The cut is made in line with the press operating cycle and is adjusted automatically to the operating speed of the press. The cut-off length can be adjusted infinitely between 15 ¨ú" and 28 ¨ü" by computer control.
Once the cutting process is completed, the sheet is accelerated slightly and guided to a shingling unit. Here, the rear edge of the sheet is lifted so that the following sheet enters into the free gap. The stream of shingled stock thus formed is directed unchanged to the forwarding rollers in the feeder.
In order to process sheets, the motor-driven cutting unit is removed from the feeder area laterally towards the drive side.
Range of uses
The CutStar is a particularly useful investment for general commercial printshops with sheet-reversal machines and label printers. These are areas of use that frequently need only a single pass. The sheeter is utilized to the full potential and maximum cost-effectiveness is realized.
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