JPS5521449A - Contamination-free chalk and its manufacture - Google Patents

Contamination-free chalk and its manufacture

Info

Publication number
JPS5521449A
JPS5521449A JP9429278A JP9429278A JPS5521449A JP S5521449 A JPS5521449 A JP S5521449A JP 9429278 A JP9429278 A JP 9429278A JP 9429278 A JP9429278 A JP 9429278A JP S5521449 A JPS5521449 A JP S5521449A
Authority
JP
Japan
Prior art keywords
chalk
manufacture
contamination
skin
outer periphery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9429278A
Other languages
Japanese (ja)
Inventor
Mitsuyoshi Uenishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UENISHI DENKI SEIKI KK
Original Assignee
UENISHI DENKI SEIKI KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UENISHI DENKI SEIKI KK filed Critical UENISHI DENKI SEIKI KK
Priority to JP9429278A priority Critical patent/JPS5521449A/en
Publication of JPS5521449A publication Critical patent/JPS5521449A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To manufacture the title chalk capable of preventing hands, fingers, and clothings from contamination during writing operation, by integrally forming a skin on the outer periphery of the chalk.
CONSTITUTION: A high polymeric or inorganic material free of adherence to a blackboard, etc. is stuck to or impregnated in the outer periphery 4 of a chalk 1 (white or colored) having a required shape or length in such a way as to envelop particles 3 at the chalk surface to form a skin 2 in a single step.
COPYRIGHT: (C)1980,JPO&Japio
JP9429278A 1978-08-01 1978-08-01 Contamination-free chalk and its manufacture Pending JPS5521449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9429278A JPS5521449A (en) 1978-08-01 1978-08-01 Contamination-free chalk and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9429278A JPS5521449A (en) 1978-08-01 1978-08-01 Contamination-free chalk and its manufacture

Publications (1)

Publication Number Publication Date
JPS5521449A true JPS5521449A (en) 1980-02-15

Family

ID=14106176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9429278A Pending JPS5521449A (en) 1978-08-01 1978-08-01 Contamination-free chalk and its manufacture

Country Status (1)

Country Link
JP (1) JPS5521449A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60139768A (en) * 1983-12-28 1985-07-24 Arupaa Kk Chalk and production thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60139768A (en) * 1983-12-28 1985-07-24 Arupaa Kk Chalk and production thereof
JPH0139704B2 (en) * 1983-12-28 1989-08-23 Arupaa Kk

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