Ball-point pen

A technology for ballpoint pens and nibs, applied in the direction of ballpoint pens, nibs, printing, etc., to achieve the effect of inhibiting scratches and stains and preventing scratches and stains

Active Publication Date: 2004-05-19
THE PILOT INK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention has been developed to solve the problems of the prior art, and the object of the present invention is to provide a ballpoint pen in which there is no possibility of scratches and stains during the writing process after the start of writing until the filling ink is almost exhausted, Even if the ballpoint pen is filled with low-viscosity ink

Method used

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Embodiment Construction

[0038] The manner in which the present invention is carried out is described below with reference to the accompanying drawings.

[0039] Figure 1 to Figure 5 A first embodiment of the invention is shown.

[0040] In this embodiment, the ballpoint pen 1 includes: a nib body 2 formed so that a ball 3 is rotatably retained at the front end portion of the nib body 2; a holder 5 formed so that the rear of the nib body 2 is pressed Into and fixed in the front of the holder 5; ink tube 6, the ink tube 6 is formed so that the rear of the holder 5 is pressed into and fixed in the front opening of the ink tube 6; the ink stored in the ink tube 6; An ink follower 8 accommodated in the ink tube 6; an elastic member 4 (spring) located inside the nib body 2 and inside the holder 5; and a tail plug 9 pressed into and fixed in the opening portion of the rear end of the ink tube 6 .

[0041] The ink tube 6 is shaped like a right cylinder having opposite open ends, and is formed by extrusio...

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Abstract

Ink and an ink follower are reserved in an ink tube. An elastic member urges a ball forward. When an outflow of ink is measured at intervals of a writing distance of 100 m, the value of outflow of ink per writing distance of 100 m until a measurement time just before outflow of 80% of the amount of charged ink from the start of writing is selected to be in a range between a value smaller by 20 mg than the outflow of ink in the writing distance range of from 0 m to 100 m and a value larger by 20 mg than the outflow of ink in the writing distance range of from 0 m to 100 m.

Description

technical field [0001] The present invention relates to a ballpoint pen having low-viscosity ink stored directly in an ink tube, and an ink follower located at the rear end of the ink. Background technique [0002] In the prior art, as described in JP-Y2-2555677 (Utility Model Publication No. registered in Japan: 2555677), the ballpoint pen has a pasty backflow prevention agent located in the ink tube, and is filled with ink before the backflow prevention agent, and has A nib fixed to the front end of the ink tube while rotatably retaining a ball protruding from the front end of the nib and having a spring for pushing the ball against the inward front edge of the nib when the ballpoint pen is not in use. Also, the ink tube is filled with low-viscosity water-based ink. [0003] In prior art ballpoint pens, low-viscosity water-based ink is filled. Therefore, sufficient ink outflow characteristics can be satisfactory when writing is started. However, there is a possibility t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43K7/00B43K7/01C09D11/18
CPCB43K7/10B43K7/08C09D11/18B43K7/01B43K1/084B43K1/086
Inventor 安藤正史
Owner THE PILOT INK CO LTD
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