Short period recording pen

A short-term recording and pen technology, applied in the field of writing pen, can solve the problems of leakage, unfavorable paper saving, scratch paper cannot be reused, etc., and achieve the effect of saving paper

Inactive Publication Date: 2004-02-11
王力
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, the handwriting of various pens currently in use cannot disappear automatically after a certain period of time
After making a draft, the draft paper cannot be reused, which is not conducive to saving paper
Moreover, some written and recorded materials that need to be kept confidential may easily cause leakage due to failure to deal with them in time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The optimum raw material ratio that embodiment adopts is: (weight ratio)

[0013] Cadmium Oxide 35%

[0014] Dibutyl phthalate 25%

[0015] Xylene 35%

[0016] The production sequence of oleic acid 5% is:

[0017] 1. Soaking: Soak cadmium oxide in dibutyl phthalate-2-carboxylate.

[0018] 2. Grinding: The soaked mixture is repeatedly ground with a three-roll mill until it becomes a paste.

[0019] 3. Mixing: Mix and stir the paste with xylene and oleic acid to adjust to an appropriate concentration.

[0020] 4. Filling and core making: the finished product of process 3 is filled in the core tube of the ballpoint pen core with the pen core filling machine, and the grease seal and the nib installation are carried out.

[0021] 5. Pen making: put the prepared pen core into the pen case, and it is ready.

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PUM

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Abstract

Black cadmium oxide powder after being exposed to air for some time will reacts with CO2 in air to produce white cadmium carbonate. The present invention uses cadmium oxide as developing agent, and produces pen with cadmium oxide, dibutyl phthalate, xylene and oleic acid and through soaking, grinding, mixing, filling and other steps. The writing of the pen will change its color from black into white after some time. The present invention makes it possible to reuse the paper for several times and to protect some document against disclosing.

Description

Technical field [0001] The invention is a pen for writing. Background technique [0002] Present various writing pens include fountain pens, fountain pens, ballpoint pens, pencils and the like. After writing, the handwriting of fountain pens, fountain pens, and ballpoint pens cannot be removed, while the handwriting of pencils needs to be erased with an eraser. In a word, the handwriting of various pens currently used cannot disappear automatically after a certain period of time. After making a draft, the draft paper cannot be reused, which is not conducive to saving paper. Moreover, some written and recorded materials that need to be kept confidential may easily cause leakage due to failure to deal with them in time. Contents of the invention [0003] The object of the present invention is to provide a pen whose handwriting disappears automatically after a certain period of time, which is used for short-term recording. [0004] The present invention realizes the purpo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00
Inventor 王力
Owner 王力
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