TAPPI Sheet Former (Semi-automatic) - OpTest

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TAPPI Sheet Former (Semi-automatic)

This instrument reduces inconsistent results and errors by reducing user interaction in the sheet forming process. In addition to automation of filling, agitation, calming, and drainage this sheet former uses a vacuum system to remove the hand-sheet without the need of a roller. The hand-sheet forming process requires a sheet press and sheet dryer (sold separately).

Product Name TAPPI Sheet Former (Semi-automatic)
Product Code PTA-070876
Standards/Methods TAPPI T 205, ISO 5269-1, SCAN C26
Test Material Pulp
Manufacturer The PTA Group / IDM (PTA)
Availability from OpTest Exclusive to Canada

• Touch screen display
• Automatic and manual sheet forming
• Gravitational dewatering
• Pneumatic couching device
• Standard former column diameter of 159 mm (customized former column upon request)
• Water Connection: Supply of 200 kPa, drainage
• Electrical Connection: 230V / 50Hz AC
• Air Connection: 400 – 600 kPa


Instrument Includes:
• Automatic sheet former
• 10 mirror-polished plates
• 10 drying rings
• Blotting sheets


Device Description:
The Sheet Former is built upon a warp resistant stainless-steel frame. This robust base holds the sheet forming column and the pneumatic couching device, both located on the left-hand side of the waterproof worktable. The control panel, including a touch screen display, start and stop button and other important controls, is located on the right-hand side. Multiple gauges enable the operator to supervise the pneumatic couching process. The sheet forming process can be performed manually or automatically. Therefore, you can find a manual operation switch next to the touch screen display that allows you to control the individual steps of the sheet forming process by hand.


Test Description:
After initiating the process by pressing the start button, the water column is being filled with water automatically. Now the suspension needs to be added. The filling process will stop as soon as the water has reached the set limit. Agitation will start according to the pre-set values prior to the calming process. The subsequent gravitational dewatering process will finally form the sheet upon the screen plate. Each step of sheet forming related to the former column can be executed manually via the manual operation switch. The former column can now be opened, and the couching process needs to be performed. Therefore, two blotters need to be laid onto the wet sheet before lowering the couching device. After locking the couching unit, the membrane is being pressurized and will perform the couching process pneumatically. When the set couching time has elapsed, the sheet is ready for pressing and drying.


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