Writing instruments and associated methods

Patent metadata

Field	Value
Publication number	US-12064989-B2
Application number	US-202117398712-A
Country	US
Kind code	B2
Filing date	Aug 10, 2021
Priority date	Sep 26, 2017
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

Embodiments of the disclosure can include writing instruments, nibs for writing instruments, and methods of making the same. In one embodiment, the writing instrument includes a reservoir; an ink solution comprising a pigment, the ink solution being housed within the reservoir; a nib disposed at an end of the reservoir and plugging an opening of the reservoir such that the reservoir is closed, wherein a tip of the nib extends outside of the reservoir; and a filament extending within the reservoir, the filament being in fluid communication with a portion of the nib within the reservoir, such that the ink solution travels along the filament and through the nib, by capillary action, wherein the nib and filament are formed such that no more than 50 percent of the pigment present in the nib and filament flow into the reservoir outside of the nib and filament when the writing instrument is stored with the nib up for a period of one day.

First claim

What is claimed is:

1. A method of making a nib for an ink-based writing instrument, comprising:
forming a nib material; and
cutting the nib material, via a blade, to form a nib having a nib tip;
wherein the nib material has a porosity of 0.5 to 0.65; and
wherein the nib has at least one channel positioned within and extending a length of the nib, the at least one channel having a diameter of from about 50 microns to about 150 microns.

2. The method of claim 1 , wherein the nib material comprises fibers having a thickness of from about 2 denier to about 20 denier.

3. The method of claim 1 , wherein the nib material comprises fibers having a thickness from about 2 denier to about 10 denier.

4. The method of claim 1 , wherein the nib material comprises fibers having a thickness of from about 5 denier to about 7 denier.

5. The method of claim 1 , wherein the nib material is a porous polymeric material.

6. The method of claim 1 , wherein the nib material comprises a melamine resin and acrylic fibers.

7. The method of claim 1 , wherein the nib material has a porosity of 0.55 to 0.65.

8. The method of claim 1 , wherein the nib material has a porosity of 0.63 to 0.65.

Assignees

• Sanford Lp

Inventors

• Marschand Bret Ryan
• Kwan Wing Sum Vincent

Classifications

• B43K8/03

  Ink reservoirs; Ink cartridges · CPC title

• B43K8/022

  with writing-points comprising fibres · CPC title

• B43K1/12

  Writing-points comprising fibres; Felt pads · CPC title

• B43K1/006

  Porous nibs (B43K1/12 takes precedence) · CPC title

• B43K8/06 Primary

  Wick feed from within reservoir to writing-points · CPC title