Writing instruments

Patent metadata

Field	Value
Publication number	US-12202294-B2
Application number	US-202118254725-A
Country	US
Kind code	B2
Filing date	Nov 22, 2021
Priority date	Nov 26, 2020
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

An ink writing instrument comprising a body extending along an axis and having a first end, the first end being provided with a writing tip and with an eraser, the eraser is movable along the axis with regard to the body, a helical-cam propelling mechanism being configured to move the eraser along the axis between a retracted position and a protruded position, the helical-cam propelling mechanism comprising a helical cam radially protruding from one of the eraser and the body, and two cam followers arranged on the other of the eraser and the body, the two cam followers axially sandwiching the helical cam at least when the eraser is moved between the retracted position and the protruded position.

First claim

The invention claimed is:

1. An ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is configured to be fed with ink and the eraser is movable along the axis with regard to the body, the ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruded position, and the helical-cam propelling mechanism comprising a helical cam radially protruding from one of the eraser and the body, and two cam followers arranged on the other of the eraser and the body, the two cam followers axially sandwiching the helical cam at least when the eraser is moved between the retracted position and the protruded position, the body comprising a first part and a second part rotatable around the axis with regard to the first part and axially coupled with the first part, the second part being provided with the helical cam or the two cam followers, wherein the second part comprises a first portion rotatably mounted with the first part and a second portion rotatably coupled with the first portion, and the first portion is provided with one of the two cam followers and the second portion is provided with the other of the two cam followers.

2. The ink writing instrument according to claim 1 , wherein the writing tip is fixed with regard to the body.

3. The ink writing instrument according to claim 1 , wherein the eraser and the writing tip are at least in part coaxial, all or part of the eraser is disposed around all or part of the writing tip at least when the eraser is in the retracted position, the writing tip comprising a writing end, and, when the ink writing instrument is seen perpendicular to the axis, the writing end is concealed by the eraser when the eraser is in the protruded position and the writing end is free from the eraser when the eraser is in the retracted position.

4. The ink writing instrument according to claim 1 , wherein the eraser is rotatably coupled with the first part, axially slidable with regard to the first part, axially coupled with the second part and rotatable with regard to the second part.

5. The ink writing instrument according to claim 1 , wherein the first end is provided with a protection which is distinct from the eraser and is movable along the axis with regard to the body between a retracted position and a protruded position, and the protection is configured to protect the writing tip in the protruded position.

6. The ink writing instrument according to claim 5 , wherein the helical-cam propelling mechanism is configured to move the protection along the axis between the retracted position and the protruded position.

7. The ink writing instrument according to claim 5 , wherein the helical-cam propelling mechanism comprises a second helical cam, the second helical cam radially protrudes from one of the protection and the body.

8. The ink writing instrument according to claim 5 , wherein the helical-cam propelling mechanism is configured to move only one of the eraser and the protection at time.

9. The ink writing instrument according to claim 5 , wherein the helical-cam propelling mechanism comprises a stopper configured to axially block one of the eraser and the protection when the other of the eraser and the protection is moved between the retracted position and the protruded position.

10. The ink writing instrument according to claim 5 , wherein the protection and the eraser are at least in part coaxial.

11. The ink writing instrument according to claim 5 , wherein the protection has at least a portion forming a sleeve around the eraser and the writing tip, the sleeve configure to slide along the axis in order to free a writing end for writing, when in the retracted position, or to conceal the writing end for its protection when in the protruded position.

12. The ink writing instrument according to claim 5 , wherein the protection has a cylindrical portion extending along the axis, the cylindrical portion of the protection having an axial length greater than or equal to an axial length of the portion of the writing tip which protrudes axially out of the body.

13. The ink writing instrument according to claim 5 , wherein the eraser comprises a first half-cylindrical portion extending along the axis and the protection comprises a second half-cylindrical portion extending along the axis, the first half-cylindrical portion and the second half-cylindrical portion forming a cylindrical casing configured to receive a writing body having a writing end and being configured to slide relatively to each other along the axis when the eraser or the protection is moved between the retracted position and the protruded position.

14. The ink writing instrument according to claim 1 , comprising a writing body having a writing end, the writing body being coupled with the second end.

15. The ink writing instrument according to claim 1 , wherein the first end is provided with a protective cover fixed with regard to the body.

16. The ink writing instrument according to claim 1 , wherein the ink is an erasable ink.

17. The ink writing instrument according to claim 1 , wherein the first end is provided with a protective cover that is fixed with respect to the body, wherein the protective cover has at least one cut.

18. The ink writing instrument according to claim 17 , wherein the protective cover is configured to be elastically deformed from a rest configuration to a deformed configuration so as to allow passage of the eraser through the at least one cut when the eraser is moved from the retracted position to the protruded position and to return to a rest configuration when the eraser is moved from the protruded position to the retracted position.

19. An ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is configured to be fed with ink and the eraser is movable along the axis with regard to the body, the ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruded position, and the helical-cam propelling mechanism comprising a helical cam radially protruding from one of the eraser and the body, and two cam followers arranged on the other of the eraser and the body, the two cam followers axially sandwiching the helical cam at least when the eraser is moved between the retracted position and the protruded position, wherein the first end is provided with a protection which is distinct from the eraser and is movable along the axis with regard to the body between a retracted position and a protruded position, and the protection is configured to protect the writing tip in the protruded position.

20. An ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is configured to be fed with ink and the eraser is movable along the axis with regard to the body, the ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retract

Assignees

• SOCIéTé BIC

Inventors

• Malinverni Samuel

Classifications

• B43K29/02 Primary

  with rubbers · CPC title

• B43K24/00

  Mechanisms for selecting, projecting, retracting or locking writing units · CPC title

• B43K23/12 Primary

  for pens {(caps co-operating with retractable nibs B43K5/165)} · CPC title