Nib for writing felt pen

Patent metadata

Field	Value
Publication number	US-11697302-B2
Application number	US-202017754279-A
Country	US
Kind code	B2
Filing date	Sep 28, 2020
Priority date	Sep 30, 2019
Publication date	Jul 11, 2023
Grant date	Jul 11, 2023

Abstract

A nib for a refillable free ink writing felt pen includes a body and a dry ink tank including dry ink, the dry ink tank being delimited by the body of the nib and a dry ink tank wall including a water-soluble film.

First claim

The invention claimed is:

1. A nib for a refillable free ink writing felt pen comprising:
a body comprising:
a first end, configured to deliver ink to a writing support;
a second end, opposite the first end, configured to be inserted in a nib receiving part of a refillable free ink writing felt pen body of the refillable free ink writing felt pen; and
a dry ink tank comprising dry ink, the dry ink tank being delimited by the second end of the body of the nib and a dry ink tank wall comprising a water-soluble film.

2. The nib according to claim 1 , wherein the dry ink tank wall consists of the water-soluble film attached to the second end ( 22 B) of the body of the nib.

3. The nib according to claim 1 , wherein the dry ink tank wall comprises a tubular wall having a first end attached to the second end of the body of the nib and a second end, opposite the first end of the tubular wall, the water-soluble film being attached to the second end of the tubular wall.

4. The nib according to claim 3 , wherein the tubular wall is made of the same material as the body of the nib.

5. The nib according to claim 3 , wherein the tubular wall is made of a non-porous material.

6. The nib according to claim 5 , wherein the tubular wall comprises polypropylene or polyethylene.

7. The nib according to claim 1 , wherein the body of the nib is a sintered powder nib comprising polypropylene or polyethylene.

8. The nib according to claim 1 , wherein the body of the nib comprises fibres agglomerated by a resin, the resin being polyurethane or urea aminoplast.

9. The nib according to claim 1 , wherein the body of the nib is an extruded nib comprising polyacetal, polypropylene or polyethylene.

10. A writing kit comprising a refillable free ink writing felt pen body and one or more nibs according to claim 1 .

11. The writing kit according to claim 10 , wherein a nib free of a dry ink tank is received in a nib receiving part of the refillable free ink writing felt pen body.

12. A refillable kit for a refilling free ink writing felt pen body comprising one or more nibs according to claim 1 .

13. The nib according to claim 1 , wherein the body of the nib comprises fibres agglomerated by a resin, the fibres being polyester, acrylic, polyamide or polyacrylonitrile.

14. The nib according to claim 1 , wherein the body of the nib comprises fibres agglomerated by a resin, the fibres being polyester, acrylic, polyamide or polyacrylonitrile and the resin being polyurethane or urea aminoplast.

15. A method for filling a refillable free ink writing felt pen body, the refillable free ink writing felt pen body comprising a nib receiving part and a liquid ink tank, the method comprising:
filling the liquid ink tank with water;
inserting the nib according to claim 1 in the nib receiving part so that the second end of the body of the nib may be in contact with the water in the liquid ink tank;
dissolving the water-soluble film with the water in the liquid ink tank so as to free the dry ink;
mixing the dry ink and the water so as to make fresh liquid ink.

16. The method according to claim 15 , wherein a used nib received in the nib receiving part is removed from the refillable free ink writing felt pen body.

17. The method according to claim 15 , wherein filling the liquid ink tank with water is carried out through the nib receiving part.

18. The method according to claim 15 , wherein filling the liquid ink tank with water is carried out through an opening of the liquid ink tank.

Assignees

• SOCIéTé BIC

Inventors

• Roudaut Etienne

Classifications

• B43K1/003

  Capillary nibs · CPC title

• B43K1/12

  Writing-points comprising fibres; Felt pads · CPC title

• B43K5/03 Primary

  specially adapted for concentrated ink, e.g. solid ink · CPC title

• B43K8/10 Primary

  including compartment for soluble solid material · CPC title

• B43K17/01

  Nibs with ink reservoirs · CPC title