The increased frictional forces also produce more heat, which can adversely affect print quality.
The pressure of the impression roller against the gravure cylinder can be adjusted, and printers commonly adjust it to the least amount of pressure needed to generate the desired print quality, as increased pressure causes structural damage to the press bearings, the gravure cylinder, and the roller covering. Consequently, rotation of the impression roller is not uniform, and the velocity differential also puts additional strain on the web. The pressure at the nip also causes a deformation of the resilient surface of the impression roller, which slows down its rotation at the nip. The impression roller is usually smaller than the gravure cylinder, and consequently runs at a higher RPM than the gravure cylinder. It is driven by frictional forces generated by contact with the motor-driven gravure cylinder. The impression roller is a steel tube covered by an elastic polymer, such as natural rubber, or synthetic rubbers such as neoprene, Buna N, and polyurethanes (the coating having a thickness varying from H to I inch). Its rubbery surface facilitates squeezing the substrate into the individual inked cells of the gravure cylinder where ink is transferred by capillary action. (This nip is referred to as the impression zone.) The impression roller, typically located above the gravure, or image-carrying, cylinder forms a hard yet resilient backing for the substrate. Time bound and reliable services, combined with producing superior quality output remains our USP, which has endeared us to numerous clients across Karnataka, Maharashtra and Goa.A resilient cylinder or roller found on a gravure press forming a nip with the gravure cylinder through which the substrate passes.
We offer total and holistic solutions in the domain of design, printing and packaging, solutions which include designing, DTP & proofing, commercial offset printing in both web and sheet fed, packaging solutions for food & pharmaceuticals, newspaper web printing, as well as variety of finishing & binding processes in post press division. With In-house design & pre-press studio, modernised production lines and combination of various print technologies, the set up is absolutely unique in the industry, providing competitive edge to its customers. and is equipped with the latest & best in line machines catering to all the three key areas of the field, pre-press, press & post press. The printing unit of Impressions Group at Belgaum is spread over 50,000 Sq. operate from 5 other strategic locations such as Goa, Kolhapur, Hubballi, Shimoga & Mangaluru. With its headquarters at Belgaum, Impressions/Elegant Offset Printers Pvt. Impressions Group offers the largest printing facility in the area comprising of North Karnataka, Western Maharashtra and the State of Goa with capacity of execute end to end requirements in designing, printing and packaging.
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