Writing tool and dispensing unit thereof
AssigneeSDI Corporation
InventorSzu-Yu Chen
Life of this patent
Estimating the term…
Abstract
A writing tool includes a writing unit, a capillary member, a dispensing unit, and a replaceable ink cartridge. The capillary member, the dispensing unit, and the replaceable ink cartridge are mounted in the writing unit. The dispensing unit contacts the capillary member and has at least one cutting portion. The replaceable ink cartridge accommodates ink therein and has a film at one end thereof. The replaceable ink cartridge can be installed in the dispensing unit and the film can be pierced and cut by the at least one cutting portion. The ink flows through the film and is delivered to the writing unit via the capillary member and the dispensing unit for writing. The writing tool can thus dispense the ink fluently and leave no residual ink.
Claims16
A writing tool, comprising:
- a writing unit having a tube and a nib mounted at an end of the tube;
- a capillary member mounted in the tube and contacting the nib;
- a dispensing unit mounted in the tube and having an inbound part having at least one cutting portion, a first coupling portion, and an external passage, the at least one cutting portion having at least one cutting edge formed on a top thereof, the first coupling portion surrounding the at least one cutting portion, the external passage being defined between the at least one cutting portion and the first coupling portion;
- an outbound part contacting the capillary member;
- and a dispensing passage communicating with the outbound part, the inbound part, and the external passage;
- and a replaceable ink cartridge mounted in the tube and communicating with the dispensing unit, the replaceable ink cartridge having a second coupling portion connected with the first coupling portion;
- ink contained in the replaceable ink cartridge;
- and a film cut by the at least one cutting edge for output of the ink;
- wherein the at least one cutting edge comprises at least one first end and at least one second end, and a height difference is defined between the at least one first end and the at least one second end;
- wherein the dispensing unit comprises a second cutting portion, and wherein the second cutting portion and the at least one cutting portions are arranged annularly and and spaced at intervals about a dispensing passage.
A dispensing unit of a writing tool, the writing tool having a capillary member, a tube, and a replaceable ink cartridge, the dispensing unit being mounted in the tube and comprising:
- an outbound part contacting the capillary member;
- an inbound part having at least one cutting portion having at least one cutting edge formed on a top thereof;
- a first coupling portion surrounding the at least one cutting portion;
- and
- an external passage defined between the at least one cutting portion and the first coupling portion;
- and
- a dispensing passage communicating with the outbound part, the inbound part, and the external passage;
- wherein the at least one cutting edge comprises at least one first end and at least one second end, and a height difference is defined between the at least one first end and the at least one second end;
- wherein the dispensing unit comprises a second cutting portion, and wherein the second cutting portion and the at least one cutting portion are arranged annularly and spaced at intervals about a dispensing passage.
Dependencies are inferred from the claim text.