JPS5761637A - Method of tube bending for circular fluorescent lamp - Google Patents

Method of tube bending for circular fluorescent lamp

Info

Publication number
JPS5761637A
JPS5761637A JP13811180A JP13811180A JPS5761637A JP S5761637 A JPS5761637 A JP S5761637A JP 13811180 A JP13811180 A JP 13811180A JP 13811180 A JP13811180 A JP 13811180A JP S5761637 A JPS5761637 A JP S5761637A
Authority
JP
Japan
Prior art keywords
bending
tube
drum
glass tube
heater
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
JP13811180A
Other languages
Japanese (ja)
Inventor
Kenji Kadonami
Osamu Kato
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.)
CKD Corp
Original Assignee
CKD Corp
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 CKD Corp filed Critical CKD Corp
Priority to JP13811180A priority Critical patent/JPS5761637A/en
Publication of JPS5761637A publication Critical patent/JPS5761637A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/04—Re-forming tubes or rods
    • C03B23/06—Re-forming tubes or rods by bending
    • C03B23/065—Re-forming tubes or rods by bending in only one plane, e.g. for making circular neon tubes

Abstract

PURPOSE: When a glass tube is made into a circle to produce a circular fluorescent lamp, a heater is used to heat the outside surface of the tube while it is being bended into a circle around the drum to facilitate the bending and incrase the yield of the product.
CONSTITUTION: Glass tube 1 is set vertically and heated in the heating furnace. When the temperature reaches the softening point, the glass tube is taken out of the furnace and transferred to the processing position while the tube is kept vertical. The glass tube 1 is held at the lowe end with the chuck nails 22 on the bending drum 2 and the drum is made to rotate upward to bend the tube along the curved groove 21 on the drum until the bending is completed at the top end. During the bending operation, the heater 3 is set on the outside of the glass to be bended in the course of the drum coating up to facilitate the bending. The heater 3 heats the outside of the glass tube expanding for bending and prevents the damage and deformation of the tube.
COPYRIGHT: (C)1982,JPO&Japio
JP13811180A 1980-10-02 1980-10-02 Method of tube bending for circular fluorescent lamp Pending JPS5761637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13811180A JPS5761637A (en) 1980-10-02 1980-10-02 Method of tube bending for circular fluorescent lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13811180A JPS5761637A (en) 1980-10-02 1980-10-02 Method of tube bending for circular fluorescent lamp

Publications (1)

Publication Number Publication Date
JPS5761637A true JPS5761637A (en) 1982-04-14

Family

ID=15214204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13811180A Pending JPS5761637A (en) 1980-10-02 1980-10-02 Method of tube bending for circular fluorescent lamp

Country Status (1)

Country Link
JP (1) JPS5761637A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101834103A (en) * 2010-03-25 2010-09-15 浙江阳光集团股份有限公司 Method for processing double-helix energy-saving fluorescent lamp
KR101159150B1 (en) 2008-08-04 2012-06-22 가부시키가이샤 나리타 세이사쿠쇼 Method and apparatus for bending tubular fluorescent lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101159150B1 (en) 2008-08-04 2012-06-22 가부시키가이샤 나리타 세이사쿠쇼 Method and apparatus for bending tubular fluorescent lamp
CN101834103A (en) * 2010-03-25 2010-09-15 浙江阳光集团股份有限公司 Method for processing double-helix energy-saving fluorescent lamp

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