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Blocking of Sheets While Sheet Feeding Due to Static

Printing press sheet feeder with stack at the unstacker
Problem

Offset printing commonly experiences static-related feed issues:

  1. Friction during sheet feeding at the unstacker builds static so sheets cling together.
  2. Air nozzles intended to separate sheets can increase static from added friction.
  3. Charged sheets adhere to the bed, upsetting register and causing stoppages/blanket damage.

Related side effects: time spent fanning/turning piles, frequent stop–clear–test cycles, and risk of blanket damage.

Solution

Install 261 Flexi Nozzles at the positions shown in your diagram:

  1. Ionized air separates sheets and neutralizes charges so only one sheet is picked and transferred.
  2. Eliminates multiple-sheet stoppages and blanket damage risk.
Benefits
  1. No fanning required; less waste clearing doubles.
  2. Protects blankets; supports higher speeds and throughput.
  3. Fewer interruptions and overtime; time freed for other tasks.
Meech 261 Flexi Nozzle
261 Flexi Nozzles

Contamination Control After Corona Treating

Diagram: static control placement after corona treater
Problem

Corona treating generates static that attracts contaminants from the machine and air onto the treated web.

Solution

Neutralize immediately after the treater using a Meech 915 bar positioned after the corona station.

Meech 915 static control bar
Meech 915 system

Inkjet Printing On Board

Inkjet print line over board substrate
Problem

Static repels ink and creates misting; ink can return to the head or land off-target. A small negative charge is also induced on ink droplets.

Solution

Use feedback-controlled ionization to maintain a uniform residual positive charge: a sensor after the bar feeding a Meech Smart Control that auto-adjusts bar output. Integrate with line control to avoid false readings on sheet gaps.

Benefits

Fewer stoppages, less head cleaning and ink waste, reduced scrap, improved uptime.

Meech Hyperion Smart Control module
Meech Smart Control

Preventing Static Issues During Fiber Optic Coating

Static bar positioned along fiber optic coating line
Problem

Static on the strand leads to uneven coating and potential scrap of entire spools.

Solution

Install a 929IPS or 924IPS Hyperion Bar parallel to strand travel before coating.

Meech 929IPS static bar
929IPS Hyperion Bar
Meech 924IPS static bar
924IPS Hyperion Bar

Static Issues During Inkjet Date Coding

Inkjet date coding on product line
Problem
  1. Misting obscures codes.
  2. Frequent head blockages.
  3. Possible ESD damage to head electronics.
Solution

Neutralize static with ionization/ionized air so ink adheres to product, not contaminants. For heavy dust, use an air amplifier to a vacuum bag to capture debris.

Static Issues During Tampo & Pad Printing

Pad printing setup with ionizing bar location
Problem

Ink spidering/webbing from charge on pad/product or contact-generated charge.

Solution

Position a 915 Bar to neutralize the source (pad or product) per machine geometry.

Meech 915 ionizing bar
915 Bar

Static Issues On Flexo Press Re-Winder

Flexo rewinder with ionizer location
Problem
  1. Operator shocks (“battery effect” on rolls).
  2. Dust attraction and stock contamination.
  3. Poor reels causing feed problems.
Solution

Fit a Meech 971IPS Bar at the rewind (optionally also at unwind) for full static control.

Meech 971IPS bar
Meech 971IPS Bar

Static Issues On Litho Press Sheet Delivery

Litho sheet delivery with 929IPS
Problem
  1. Irregular delivery stacking.
  2. Downstream finishing disruptions.
Solution

Use a long-range 929IPS Bar (ideally both sides near the pile). Its balanced field suits metallized stock and avoids gripper interference.

929IPS bar
929IPS Bar

Fire Prevention During Coating Film Using Solvent-Based Coatings

Solvent coating line with static control points
Problem

High static on substrate/rollers in solvent environments can discharge and ignite vapors—risking fire, damage, downtime, and safety incidents.

Solution

In classified zones, use ATEX-rated systems. Meech 976Ex long-range pulsed DC mitigates discharge risk on high-speed solvent lines.

Meech 976Ex pulsed DC ionizer
Meech Model 976Ex

Screen Printing – Preventing Defects Caused by Static from Squeegee

Screen printing squeegee over substrate
Problem
  1. Substrate clings to screen.
  2. Ink webbing/spidering.
  3. Dust attraction.
Solution

Install a long-range Model 971 pulsed DC bar spanning the screen width to neutralize charges from the squeegee action.

Model 971 pulsed DC bar
Model 971 Pulsed DC Bar

Screen Printing Feeder – Preventing Multiple Sheet Feeds

Screen printing feeder
Problem

Press stoppages from multiple sheets feeding.

Solution

Install Meech 261 flexi nozzles to blow ionized air between top sheets and neutralize charge.

Meech 261 flexi nozzle
Meech 261 flexi nozzles

Screen Printing Press – Preventing Screen Contamination & Print Defects

Screen printing with ionizer in front of squeegee
Problem

Sheets stick to the underside of the screen; ink bridging leaves holes/tags.

Solution

Place a Meech 929IPS bar in front of the squeegee to neutralize charge and prevent attraction.

929IPS static bar
Meech 929IPS bar

Screen Printing Press – Preventing Static Issues With Delivery Stack

Delivery stack area in screen printing
Problem

Top sheet hovers and won’t collate due to repelling charge.

Solution

Install a 929IPS bar at the end of the conveyor to neutralize sheets before stacking.

929IPS static bar
929IPS bar

Screen Printing – Wide Format: Prevent Sheet Adhesion to the Screen

Wide format screen printing static control layout
Problem
  1. Sheet sticks to bed or screen and misses grippers.
  2. Improper release and unstable travel toward dryer.
  3. Airborne contamination attraction.
Solution

Use 957 air curtains plus a 914 shockless ionizing bar. One 957 between each gripper; bar length matches machine width. Solenoid controls brief pulses of ionized air synchronized to gripper operation.

Meech 957 air curtain
957 air curtains
Meech 914 shockless ionizing bar
914 shockless ionizing bar

Print Finish – Inkjet: Prevent Misting, Dripping & Head Blockages

Wide format digital printer carriage
Problem

Insulative substrates accumulate charge from film removal and drying; ink repelled into a cloud causing blur, drips, and head fouling.

Solution

Install a compact Meech 976 Mini pulsed DC system on the carriage: better print quality than AC, less mass, reduced head maintenance, fewer rejects and head replacements.

Meech 976 Mini pulsed DC
976 Mini Pulsed DC system

Print Finish – High-Speed Folding: Prevent Fold Alignment Issues

High speed folding station with ionizers at gates
Problem
  1. Misalignment in folding gates.
  2. Sheets won’t feed out.
  3. Costly downtime clearing stations; speed reductions.
Solution

Place two Model 915 bars at the base of the gates across both double stations for strong, targeted ionization.

Model 915 ionizing bar
Model 915 bars

Print Finish – Static Pinning of Magazines to Prevent Stack Slipping

Compensating stacker moving finished magazine piles
Problem

Smooth covers allow stacks to slide during transport to strapping/palletizing, causing poor stack shape and rework.

Solution

Use static pinning to hold stacks together during transfer, improving presentation and reducing manual re-stacking.

Fire Risk During Gravure Printing

Gravure press with static control positions
Problem

Flammable solvents + static on web/rollers can discharge at the nip and ignite vapors; short-range bars may underperform and foul quickly.

Solution

Fit a Meech 915EX bar with up to 150 mm range for larger footprint, longer dwell, and cleaner, safer placement away from the web.

Meech 915 ionizing bar
Model 915 bars