Double-chuck mechanical pencil
AssigneeKotobuki & Co., Ltd.
InventorsHidehei Kageyama, Shouji Anzai, Yoshihide Mitsuya
Life of this patent
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Abstract
A double-chuck mechanical pencil having a front lead chuck for holding a lead and a back lead chuck for advancing a lead which is composed of a barrel, a lead tank connected to the back lead chuck, an adapter attached to the back of the lead tank which is restrained from rotation relative to the barrel and axially movable, and a rotary eraser projecting mechanism including a support member or an eraser support structure including a support member that is restrained from rotation relative to the adapter and detachable from the back portion of the adapter.
Claims4
A double-chuck mechanical pencil having a front lead chuck for holding a lead and a back lead chuck for advancing a lead, said double chuck mechanical pencil comprising:
- a barrel;
- a lead tank connected to the back lead chuck;
- an adapter fixedly put on a back portion of the lead tank, restrained from rotation relative to the barrel and axially movable;
- and
- an eraser support structure provided with a support member restrained from rotation relative to the adapter, and detachably connected to a back portion of the adapter;
- wherein the eraser support structure is provided with an eraser jacket firmly jacketing an eraser and capable of allowing a desired length of the eraser to be pulled out from the eraser jacket when the eraser is abraded.
Dependencies are inferred from the claim text.