SDS Smart Discharging System
The new Eltex SDS Static Discharge bars provide a stand-alone discharge bar which does not require an expensive High Voltage Power Supply. Instead, it uses a simple 24V power supply, either taken from a machine control circuit, or via a simple commercial power supply.
The SDS is ideal for those one-off problems which often occur on unwind or rewind stations, or where static control is required at both ends of a machine, which would otherwise require very long HV cables to be routed. Delivery stations on sheetfed presses are a typical example.
The SDS also has a longer range than the traditional R50 discharge bar which is limited to 70-100mm from the web. The SDS 7 has a range of <150mm, whilst the SDS11 has a range of >150<300mm; more than enough for most sheetfed printing and wind/unwind stations on plastics web processing.
The SDS is ideal for those difficult delivery problems on injection moulding machines, as it can be easily positioned along a delivery conveyor, or where the components are fed into a plastic bag or bin, to prevent static shocks or component “clumping”.
Easy to install, long range and versatile; the Eltex SDS provides an ideal solution for those one-off static problems.
Literature
Electrostatic Printing Assist
Renmar provides 3 different types of Electrostatic Printing Assist to cover all types of gravure printing and web widths. The GNH 61 uses a static charging bar to generate a charge on the impression roller, whilst the GNN71 uses a rotary transformer attached to the end of the impression roller to generate the charge. Finally, the GNN75 applies a voltage to the impression roller core which translates to a charge on the roller surface.
GNH61 Top Loading
The infeed paper or film web is discharged by a discharge bar to eliminate any existing residual static charges. The impression roller bar transfers a charge into the conductive layer of the impression roller coating to provide the voltage required in the printing nip. This nip voltage (300…1000 V DC) causes the ink to transfer from the cells to the substrate with point-to-point accuracy and without high impression roller pressure.
There is a discharge bar mounted on the outlet side to eliminate any residual charges on the surface of paper or the film. A 2-layer impression roller is used for the ESA GNH61 system to ensure an even distribution of the charge in the printing nip.
Technical information (PDF)
Product brochure (PDF)
Impression roller specifications (PDF)
GNN71
GNN71 Side Loading
The infeed paper or film web is discharged by a discharge bar to eliminate any existing residual static charges. The nip voltage required in the printing nip is transferred into the conductive layer of the impression roller coating via the rotary transformer. This nip voltage (300…1000 V DC) causes the ink to transfer from the cells to the substrate with point-to-point accuracy and without high impression roller pressure.
There is a discharge bar mounted on the outlet side to eliminate any residual charges on the surface of paper or the film. A 3-layer impression roller is used for the ESA GNN71 system which ensures an even distribution of the charge in the printing nip.
Technical information (PDF)
Product brochure (PDF)
Impression roller specifications (PDF)
GNN75
GNN75 Core Charging
The infeed paper or film web is discharged by a discharge bar to eliminate any existing residual static charges. The nip voltage required in the printing nip is fed directly into the roller core via the bearing of the impression roller via a ball spring contact. The impression roller has to be insulated from surrounding press parts. The nip voltage (300…900 V DC) causes the ink to transfer from the cells to the substrate with point-to-point accuracy and without high impression roller pressure.
There is a discharge bar mounted on the outlet side to eliminate any residual charges on the surface of paper or the film. A single-layer impression roller is used for the GNN75 system to ensure the even distribution of the charge in the printing nip. The GNN75 can only be delivered by arrangement with the press manufacturer.
Technical information (PDF)
Product Brochure (PDF)
Impression roller specifications (PDF)
Impression roller and bearing insulation (PDF)
Ribbon Tracking
GHH36
Standard in gravure printing – can be retrofitted in heatset web offset
Ribbon Tracking in publication gravure printing
The GHH36 electrostatic ribbon tracking system is used in the folder of publication gravure printing presses. Their task is to electrostatically block the incoming paper ribbons to prevent dog ears.
Ribbon Tracking in heatset web offset
The GHH36 electrostatic ribbon tracking system is also being used more and more frequently in heatset web offset. As a standard feature for new presses and available for retrofitting on all common heatset presses of the world.
GHH36 – Electrode Charging
High voltage generators generate positive and negative high voltage which is passed on to the charging bars mounted in the folder. The positive and negative bars are arranged in opposition to each other. The ribbons pass between them. The resulting force causes the paper ribbons to attract each other, the air in between is displaced and the ribbons are pressed against each other. The press can run at higher speed with better folder accuracy.
Further information:
Technical information
Brochure
Remoistening
WEBMOISTER 3000
Top Class Remoistening
WEBMOISTER 3000
In the past, Eltex Remoistening systems have guaranteed high quality printed products mainly on fast running and wide presses. The new WEBMOISTER 3000 now ensures high-quality products in all heatset web offset presses.
Using a new nozzle concept, both lighter and heavier grammages can be remoistened at all web speeds with ultimate precision and homogeneity.
The new two fluid atomizer nozzles are capable of applying smallestwater quantities without developing wastewater. The modular structure of the nozzle bar allows the WEBMOISTER 3000 to remoisten paper webs in widths of as much as 3 meters.
Optimized technology by new nozzle concept
Benefits:
- favourable price
- easy upgrade of existing Eltex remoistening systems
- no wastewater
- reduced water specifications
- wider web widths
- lower operating costs
- easy operation
Further Information:
Technical information
Brochure
