BloApCo #7-3 In-Line Trim Chopper | 1973 | 7" x 4" Inlet

BloApCo #7-3 In-Line High-Volume Trim Chopper | 1973

The Blower Application Co. (BloApCo) Model 7-3 is an industrial-grade, rotary in-line trim chopper designed for the continuous size reduction of edge trim from paper, film, and plastic web processing. Engineered to be integrated directly into pneumatic conveying systems, the #7-3 prevents clogs and significantly increases scrap density for more efficient baling and recycling.

This 1973 unit (S/N 067318-5) is a true "heavy-duty" build, featuring BloApCo’s signature cast iron housing and precision-ground shear knives. Designed for high-speed operation, the 7-3 uses a scissor-like cutting action that ensures clean edges and quiet performance, even when processing thin films. Its split-housing design allows for rapid access to the internal blades, making routine maintenance and blade rotations simple and fast.

Technical Specifications

• Manufacturer: Blower Application Co. (BloApCo)
• Model: 7-3
• Serial Number: 067318-5
• Year of Manufacture: 1973 (June)
• Inlet/Outlet: 7" x 4" Inlet / 8.5" x 4" Outlet
• Operation: In-Line Rotary Shear-Cut
• Air Capacity: Optimized for ~1,000 CFM
• Motor: Typically 1 HP (Verify your specific motor tag for Voltage/Phase)
• Construction: Heavy Cast Iron Housing & Rotor
• Bearings: Precision Tapered Roller Bearings
• Approximate Weight: 135 lbs

Key Features

• In-Line Efficiency: The open-rotor design allows air and material to pass through the cutting chamber without obstruction, maintaining critical pneumatic pressure.
• Precision Shear-Cut Action: Provides a clean, scissor-like cut that reduces dust and noise compared to impact-style choppers.
• Tapered Roller Bearings: High-grade bearings eliminate end-play, allowing for the tight blade clearances (down to 1 mil) necessary for thin film and foil.
• Split-Housing for Rapid Service: The upper housing can be easily removed for blade inspection or sharpening without disconnecting the machine from the ductwork.
• Built for Longevity: Vintage BloApCo units from the 1970s are overbuilt for 24/7 industrial service and are easily rebuildable with standard factory parts.