Great Moments

Year After Year Improving Duct Fabrication Productivity for YOU.

We have been in the HVAC sheet metal, duct fabrication industry for 70+ years and have specific plans for the future. In that time we have worked successfully with thousands of duct shops. We have more than accomplished our mission of reducing the cost of sheet metal duct fabrication. Imagine duct shop life without the Pittsburgh, the Welty Way / Fabriduct Coil Line, the rolled on TDC and TDF flanges, the Vulcan Cutting System, the Whisper-loc or the Cornermatic. Imagine duct shop life without our continuous improvements and other innovations.

We are proud of our innovative history and the legacy we have created. Have a look below at several milestones in the history of our company.

Great Moments Timeline

  • 1938


The Lockformer Company was founded.

  • 1939

Pittsburgh lock rollformer

The Pittsburgh lock rollformer first sold and the 2-pass bar-cleat machine was being designed.

  • 1940

Pittsburgh lock machines

The 24 ga. and the 20 ga. Pittsburgh lock machines were introduced.

(picture is of Serial Number 101; the very first  20 ga. Pittsburgh manufactured by Lockformer.

  • 1942

EZ Edger

The EZ Edger hand operated flanger is created.

  • 1946

8000 Series

The 8000 Series double-plate Cleatformer was developed to form drive cleats in one pass.

  • 1948

Standing “S” Cleat rollformer

The Standing “S” Cleat rollformer was first sold to the market.

Lockformer unveils a new logo design.

  • 1949

Charles Engel

Charles Engel S/M worker produces first Shopmaster table and Engel as a Company is established with volume of sales.

  • 1950

Welty Heating

Welty Heating is a contractor in Coggon, IA.

  • 1952

Lockformer relocated

Lockformer relocated to its new manufacturing facility on Cicero Avenue in Chicago. Hemming roll tooling was developed.

  • 1955

16 ga. Pittsburgh

The 16 ga. Pittsburgh lock machine is first introduced.

  • 1956

Pro-GutR & Co-pipe machine

Welty Heating moved to Cedar Rapids to new location under the name of Welty Way Products making patterned Pro-GutR (seamless gutter machine) & Co-pipe machines (making down spout and crimped down spout elbows).

  • 1957

Coil Select & Rollformers

Welty Way develops the Coil Select feature

Engel Adds Rollformers and Small Tools i.e. Cleatbenders, Notchers. Also added the versatile power brake called Bend All.

  • 1958

Button Punch Snaplock

The first Button Punch Snaplock machine is sold and Acme lock roll tooling was newly designed.

  • 1959

duct starter line

Shoil first duct starter line with air controlled flying shear and notcher.

  • 1960

Roto-Notcher & Collar Maker

The Roto-Notcher and Collar Maker machines were created.

  • 1963


The Speednotch multi-head notcher was first sold.

  • 1964


Duct-o-mation = full line with Lockformer Pittsburgh & Snaplock Coil – shear – notch – bead – Pitts – cleat – rolR- L-Bruct.

  • 1965

First Coil Lines

First Coil Lines with Shopmasters being fed. Electric Shear with Beading, Straightening and Feed Table to Shopmaster.

  • 1968

Fabri-duct, Digital Dynapar & Cleatformer

First full line = Fabri-duct. Anderson & Litwick + the Zach Company in Chicago

Digital Dynapar added. Coil lines with flying notcher and mechanical brake.

The Triplex Cleatformer created to produce 4 profiles in one machine with slitting attachment to cut “S” and drive cleats was added to the line-up of 8600 and 8900 Series Cleatformers.

  • 1970

Lockformer, First Insulmatic, Feedie, & Hydraulic Length

Lockformer opened its new manufacturing facility in Lisle, IL.

First Insulmatic added to Anderson & Litwick and Zach Co. do 4.5 million pounds of duct for the new McCormick Place.

Welty-Way introduces the Feedie (coil feed punch, notch, cut-off feeding rollformers).

Hydraulic Length Control Compact 5-14 Coil Lines w/ Flying Wheel Mechanical Shear and Engel Built Digital Controls +/- 1/32 Accuracy.

  • 1972


Dual Head Cleatroller introduced to Duct Lines.

  • 1974

DS Connector

The DS Connector machine featuring New England cleat roll tooling was introduced along with the 24S Bandsaw.

  • 1975


Lin-O-Matic with Gripnail Pinning System introduced along with purchased ECCI Controls Package (Digital).

  • 1977

Compact Coil line

Full Hydraulic Compact Coil line shear, notch and feed.

  • 1978


Welty Way becomes Iowa Precision and the Fabri-duct is now called Duct-o-Matic.

  • 1980

Micro Processor

First 5 Batch Micro Processor Controls.

  • 1982

Engel TDF, TDC and Vulcan

Engel TDF T25-B introduced to Market.

The Transverse Duct Connector (TDC) and the first Vulcan 1200 Plasma Cutting System were unveiled at the Atlantic City ASHRAE Show.

  • 1984

Iowa Precision, TDC Notcher & the Roll-A-Duct

Iowa Precision establishes the Coil Line Software Programming department.

The TDC Notcher and the Roll-A-Duct spiral duct rollforming system was developed.

  • 1985

Vulcan 2400 & IPI introduces...

The new Vulcan 2400 replaced the Vulcan 1200.

IPI introduces automated elbow fabrication machinery.

  • 1988

Lockformer’s 50th Anniversary

On Lockformer’s 50th Anniversary, the very first Pittsburgh Lock Machine ever produced (S/N – 101) was found in Cleveland, OH still making ductwork after 50 years!!

  • 1989

Vulcan 1800

The Vulcan 1800 was added to the Vulcan line-up.

  • 1990

Hydraulic Wrapper Brake & IPI introduces...

Hydraulic Wrapper Brake w/ side eject & Engel Built PC Controls E 1000 Controller.

IPI introduces straight line Duct Line and the Whisper-Loc seam closer offered to market.

  • 1993

Cornermatic & Vulcan PCM

The Cornermatic automated corner insertion machine is developed by Systemation introduced by IPI. SMACNA approved. Tie Rod Hole punching added to automated lines. The first 14 gauge automated Duct Line delivered.

The Vulcan PCM (now the 3100HD) was first sold to the precision HVAC metal fabrication market.

  • 1995

Multi-Grid Coil & Engel introduces...

Newly designed Multi-Grid Coil Select introduced.

Engel Seam Closer Introduced. Engel Fold N Shear introduced. End Eject Braking System in lieu of Side Eject.

  • 1999

Vulcan 1000 & Engel introduces...

The Vulcan 1000 was first introduced for high speed HVAC fitting cutting.

Engel Fold-N-Shear with In-Line Cleatroller introduced.

  • 2000

Engel introduces & Vulcan 1600

Engel CDS Corner Insertion Equipment introduced at Dallas AHR. Gripnail Welder Multi Head introduced. Touch Screen Window Based Controls E-2000 with Ethernet Capability for interface with Down Stream Equipment.

The Vulcan 1600 WaterJet was first introduced for high speed insulation cutting.

  • 2001

Acquired by Mestek...

Iowa Precision acquired by Mestek, Inc.

Lockformer acquired by Mestek, Inc.

  • 2003

Duct lines & Engel

Duct lines redesigned & renamed ProFabriduct - all lines offered with servo drives, directly driven, hydraulically actuated decoilers. Mark XV was newly designed and added to the automated lines.

Engel is acquired by Mestek, Inc.

  • 2005

TDC-V & Ductmaker Coil Line

The TDC-V is introduced to the market.

The Ductmaker Coil Line developed and offered.

  • 2006

Engel Coil Lines & Wrap Brake

The Engel Coil Lines are upgraded with Iowa Precision Features and Marketed under Mestek Machinery and the Compact II Front End now expandable.

Servo driven Wrap Brake becomes standard on all ProFabriducts. Units subsequently offered as standard in all automated duct line.

  • 2008

insulation cutting, TDC Duplex & Vulcan 1000E

Swing-Knife / Swing-Blade insulation cutting system developed for cutting elastomeric foam duct liner.

ValuePLUS line was created and offered to the market.

Fully adjustable TDC Duplex and Stand Alone from 19mm to 38mm. The Vulcan 1000E developed and offered European Community; CE Certified, zoned exhaust, B&R.

  • 2009

TDC V16 & Coil Lines

The newly designed TDC V16 is offered to the market - The Pneuma-Wrap Brake is now offered for contractors to bend TDF and TDC. 2012 Chicago AHR Introduces the advanced diagnostic tool - "Guru on a Stick" and the TDC-F AM film application machine.

All Coil Lines utilize the common B&R Control platform with industrial PLC's. The newly designed Easy-Load was offered on all coil lines.

  • 2010

Coil Line

Significant Coil Line diagnostics developed.

  • 2011

Milestone & Vulcan

Milestone: Over 1,000 Iowa Precision Coil Line Systems SOLD - Many outside of North America

Vulcan users top 3,500. The VulcanPlus with new control and "Flex-Ability" updates the Vulcan 1000D technology. Total Integration from BIM to Field using Trimble® TDL CAD.

  • 2012

Chicago AHR

Chicago AHR Introduces the advanced diagnostic tool - "Guru on a Stick" and the TDCF FAM film application machine.

Experience Based Innovation