Auto-Advance mechanism
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Auto-advance or auto-feed mechanical pencils don't need any action to advance the lead because of their particular mechanism: a spring loaded sliding sleeve (usually a plastic cone) pushes out more lead every time it is pressed and released from the paper. In order to work, it is required to write with a very little amount of lead coming outside the tip, and practically to drag the lead sleeve on the paper. Most of the time these pencils are also provided with a push button mechanism, and can be used in the classial way.
Auto-advance pencil models
Brand | Model name | Additional Features |
---|---|---|
Ohto | Auto Sharp | |
Ohto | Horizon | Double-knock mechanism with side button to retract the tip; metal body |
Faber-Castell | Grip Matic | |
Faber-Castell | Poly Matic | Twist-extendable eraser |
Maped | Automatic | |
BIC | AI | Shaker mechanism with lead lock when the lead sleeve is retracted |
Pilot | Automac | Double-knock mechanism; metal body |