Methods for manufacturing ball pen tips, ball pen tip manufacturing machines, ball pen tips and ball pens
AssigneesKotobuki & Co., Ltd., Suhan Corporation, Microtip Co., Ltd.
InventorByun Young Jae
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a ball pen tip in which a spring for biasing a ball is assembled to the ball pen tip, the method including punching the ball pen tip by a punch from a rear end of the ball pen tip along a central axis direction of the ball pen tip to form a plastic flow ridge formed by a plastic flow upheaving radially inward from an inner peripheral wall surface of the ball pen tip to assemble the spring to the ball pen tip by the plastic flow ridge.
Claims16
A method for manufacturing a ball pen tip in which a spring for biasing a ball is assembled to the ball pen tip, the method including:
- punching the ball pen tip by a punch from a rear end of the ball pen tip along a central axis direction of the ball pen tip to form a plastic flow ridge formed by a plastic flow upheaving radially inward from an inner peripheral wall surface of the ball pen tip to assemble the spring to the ball pen tip by the plastic flow ridge,
- wherein a front end and a rear end of the spring are wound into a same tapered external shape.
A method for manufacturing a ball pen tip, the method including:
- punching the ball pen tip by a punch to form a plastic flow ridge formed by a plastic flow upheaving radially inward from an inner peripheral wall surface of the ball pen tip;
- and
- assembling a spring to the ball pen tip by the plastic flow ridge,
- wherein a front end and a rear end of the spring are wound into a same tapered external shape.
Dependencies are inferred from the claim text.