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US 2001/0043832 A1Published application
Double-chuck mechanical pencil
AssigneeKotobuki & Co., Ltd.
InventorsHIDEHEI KAGEYAMA, YOSHIHIDE MITSUYA, TADAYOSHI EBINUMA
Life of this patent
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Abstract
A double-chuck mechanical pencil has an outer tube, a tip fitting provided in the front of the outer tube, a tip chuck located at the tip of the tip fitting for holding a writing substance (e.g., a lead) and urged rearward in the axial directed, and a delivery chuck for delivering the lead. At least one of the tip chuck and the delivery chuck is formed of a synthetic resin material including polyoxymethylene.
Claims34
A double-chuck mechanical pencil, comprising:
- an outer tube;
- a tip fitting provided in a front of the outer tube, and including a tip;
- a tip chuck, located at the tip of the tip fitting, for holding a lead and urged rearwardly in an axial direction;
- and
- a delivery chuck for delivering a lead, the delivery chuck being movable forwardly to deliver a lead after the tip chuck has been moved forwardly to release the lead,
- wherein at least one of the tip chuck and the delivery chuck is formed of a synthetic resin material.
3 more elements
A writing instrument, comprising:
- a fitting including a tip;
- a first chuck located at the tip of the fitting for holding a writing substance and urged in a first direction;
- and
- a second chuck for delivering the writing substance, the second chuck being movable in a second direction, to deliver the writing substance after the first chuck has been moved in the second direction to release the writing substance,
- wherein at least one of the first chuck and the second chuck is formed of a synthetic resin material.
2 more elements
Dependencies are inferred from the claim text.