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[[File:Auto-Advance-Only pencils.JPG|200px|right|Examples of auto-advance pencils that are not provided with a push button mechanism. Top to bottom: a Paper Mate Advancer, a Fila Temagraph Automatic, and a M&G Comrade]]'''Auto-advance''' or '''auto-feed''' [[mechanical pencil|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 classical way. | |||
{{TWFAFULL|Auto-Advance_mechanism}} | |||
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Revision as of 16:48, 15 October 2018
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 classical way.