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patent sellan automatic clamping pencil |
| Published: March 3, 2008, 10:56 am |
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an automatic clamping pencil with single clamp head comprises metal clip heads1 and 4 a spring sheathed with the metal clip heads a pen core tube6 connected to the spring a pressing cap9a sleeve2 to stop the metal clip head to move back a pen tube8 to be connected by rotary screws and a pen shell7 firmly fixed to the pen tube because the pawl head of the metal clip headexposes out the pen body to hold the lead core5 and is in arrowhead type the lead core may be still use [ Full article ] |
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