ART
BEAUTY & WELLNESS
CRAFT
CULTURE & HISTORY
ENTERTAINMENT
ENVIRONMENT
FOOD & DRINKS
REVERSE ENGINEERING
SCIENCES
SPORTS
TECHNOLOGY
WEARABLES
Heat Gun for Paint Removal: Ferris, 1963
Edwin W. Ferris of Greenwich, Connecticut, patented this electric paint remover in 1963, US 3,094,606: a heat gun that softens old paint without a flame. A fan in a housing with a handle blows air through a barrel. Inside is a removable heating unit, a ceramic core wound with resistance wire, with a second coil on a plate across it. The barrel's inner wall is a metal jacket: cooling air flows outside it while the air heated by the coils leaves the mouth at 500–1300 °F (260–700 °C), so the outside stays cool enough to hold. For household current Ferris proposed 110 V and a 1300 W element. A ring with a lever at the barrel's root sets how much air is heated.
Advanced
Workshop process
Instructions
1
1
Housing and fan
Housing and fan
Build the gun-like housing with a handle and a fan housing; fit a drum-type fan driven by a small motor.
Materials for this step:
Heat Gun Housing with Fan Scroll1 piece
Drum Fan and Small Motor1 pieceTools needed:
Screwdriver Set2
2
Heating unit
Heating unit
Wind resistance wire round a cylindrical ceramic core pierced with holes, ending in a ceramic disc with air holes and bayonet connectors so the unit can be taken out and replaced. Fit a ceramic plate with a second coil across the inside of the core; connect both coils in parallel.
Materials for this step:
Ceramic Heater Core with Resistance Coils1 pieceTools needed:
Combination Pliers3
3
Barrel
Barrel
Mount the heating unit in the barrel, whose inner wall forms a jacket: cooling air passes outside it from the fan housing to the atmosphere, while heated air passes through the core to the mouth.
Materials for this step:
Jacketed Metal Barrel1 pieceTools needed:
Screwdriver Set4
4
Air control
Air control
Fit the control ring with its lever between the core's disc and the ceramic base; turning it opens or closes rows of holes and sets how much of the air passes the heating coils.
Materials for this step:
Airflow Control Ring1 pieceTools needed:
Screwdriver SetMaterials
5- Placeholder
- 1 piecePlaceholder
- Placeholder
- 1 piecePlaceholder
- 1 piecePlaceholder
Tools Required
2- Placeholder
- Placeholder
This blueprint makes
Related Blueprints
These blueprints share knowledge with this one — techniques, materials, or principles that connect them in the learning graph.
CC0 Public Domain
This blueprint is released under CC0. You are free to copy, modify, distribute, and use this work for any purpose, without asking permission.
Support the Maker by purchasing products through their Blueprint where they earn a Maker Commission set by Vendors, or create a new iteration of this Blueprint and include it as a connection in your own Blueprint to share revenue.