The WSA Top Prefeeder (Compact) was first introduced in 2014 and is designed for today's most advanced top printing Mini-line and Mid-Size Flexo Folder Gluers that run at speeds of up to 450 sheets per minute and which feature very quick setups. This model works the entire stack in one motion, advances the stack onto an extendo conveyor and then shingle of board to the press. This design maximizes the amount of board which can be stored on the extendo conveyor and delivers the most consistent stream of board to the press even when handling very small blank sizes. Some of the standard features of the WSA WSA Top Prefeeder (Compact) are as follows:
 

• Stack Inverter with vacuum control of bottom sheet 
• Bottom Sheet Waste Discharge system for only removing the bottom sheet 
• Fully Automatic Setup interfaced with Press 
• Color Touch Screen Operator Interface with complete machine diagnostics. 
• Omron (or Allen Bradley) PLC 
• SICK Safety Sensors 
• All name brand and commercially available components. 
• Maximum Sheet Feed 2800mm(W) x 1200mm(L), 2500mm(W) x 1200mm(L) 
• Maximum Stack Weight 1000kgs 
• Maximum Stack Height 1900mm 
• Maximum Production Speed 450 sheets per minute 
• Speed may increase or decrease depending on stack size and sheet thickness and printing machine capability 
• Machine Model WSA-TPC 
• Machine Type: Overturn