Writing instrument with erasing member

• US 9,409,438 B2
• Filed: 12/04/2012
• Issued: 08/09/2016
• Est. Priority Date: 12/09/2011
• Status: Active Grant

• Current Assignee: Mitsubishi Pencil Company Limited
• Original Assignee: Mitsubishi Pencil Company Limited
• Inventors: Ohtsuka, Hiroshi
• Primary Examiner(s): CHIN, RANDALL E
• Application Number:
  US14/362,790
• Publication Number:
  US 20140331448A1
• Time in Patent Office: 1,344 Days
• US Class Current: 1/1
• CPC Class Codes: B43K 23/02 with means for preventing rolling B43K23/004 - B43K23/012 take precedence
• CPC Class Codes: B43K 23/124 comprising an air passage
• CPC Class Codes: B43K 23/126 with clips
• CPC Class Codes: B43K 25/022 attached to a pen cap
• CPC Class Codes: B43K 25/026 combined with other objects
• CPC Class Codes: B43K 29/02 with rubbers
• CPC Class Codes: B43K 3/00 Nib holders holders for continuously adjustable nibs B43K17/00
• CPC Class Codes: B43K 7/00 Ball-point pens B43M11/085 takes precedence; multiple-point writing implements B43K27/00
• CPC Class Codes: B43K 7/005 Pen barrels
• CPC Class Codes: B43K 7/02 Ink reservoirs; Ink cartridges B43K7/01 takes precedence
• CPC Class Codes: B43L 19/0025 Eraser or rubber material, e.g. comprising hard particles
• CPC Class Codes: B43L 19/0068 Hand-held holders
• CPC Class Codes: B43L 19/0075 of the pencil type
• CPC Class Codes: B43L 19/0087 Assembling, repairing or finishing erasers

Abstract

A writing instrument (1) is provided with an erasing member (2) mounted to the rear end section of the writing instrument body (3) or to the front end section of a cap (4). The end section has a fitting section (14) which is disposed on the center axis and a connection section (15) which connects the end section and the fitting section (14). The erasing member (2) has a fitting hole (2c) which receives both the fitting section (14) and the connection section (15). When the erasing member (2) is mounted in position, a gap space (17) is formed around the connection section (15).

Claims

1. A writing instrument comprising an erasing member which is attached to a back end part of a writing instrument body or a front end part of a cap, wherein

said end part has a fitting part which is arranged on a center axis and a connecting part which connects said end part and said fitting part,

said erasing member has a fitting hole which receives inside said fitting part and said connecting part

when said erasing member is attached, so that the fitting part contacts a portion of an inner surface of said fitting hole, while there is a clearance space between said connecting part and said inner surface of said fitting hole and

wherein said writing instrument further comprises a supporting wall which surrounds a part of said erasing member, a side surface of said part of said erasing member being provided with an engagement projecting part, and said engagement projecting part and an inner circumferential surface of said supporting wall abutting against each other.

2. The writing instrument according to claim 1, wherein a flat part is provided at the side surface of said part of said erasing member.

3. The writing instrument according to claim 2, wherein an entrance part of said fitting hole has a taper part which becomes narrower the further toward the back.

4. The writing instrument according to claim 1, wherein an entrance part of said fitting hole has a taper part which becomes narrower the further toward the back.