FR2108930A1 - Bending glass tube - eg for lighting systems - Google Patents

Bending glass tube - eg for lighting systems

Info

Publication number
FR2108930A1
FR2108930A1 FR7037968A FR7037968A FR2108930A1 FR 2108930 A1 FR2108930 A1 FR 2108930A1 FR 7037968 A FR7037968 A FR 7037968A FR 7037968 A FR7037968 A FR 7037968A FR 2108930 A1 FR2108930 A1 FR 2108930A1
Authority
FR
France
Prior art keywords
glass tube
template
contour
abutment
support surface
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.)
Granted
Application number
FR7037968A
Other languages
French (fr)
Other versions
FR2108930B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7037968A priority Critical patent/FR2108930A1/en
Publication of FR2108930A1 publication Critical patent/FR2108930A1/en
Application granted granted Critical
Publication of FR2108930B1 publication Critical patent/FR2108930B1/fr
Granted 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

Bending a straight glass tube along a predetermined contour, partic. of small radius of curvature, starting with a tube of the desired diameter and wall thickness comprises (a) a template is provided with the form of the contour to be produced, and a support surface or abutment and a free space designed to receive the straight glass tube, the template and support surface being fabricated in a material of poor heat conductivity which cannot be deformed at the softening temp. of the glass (b) the glass tube is heated to its softening point and clamped in the free space between the faces opposite to the template and abutment, (c) the free parts of the softened glass tube are shaped by exerting a bending force such that they are brought into contact with the lateral face of the template so as to complete the contour required, while maintaining a slight excess pressure insude the glass tube.
FR7037968A 1970-10-21 1970-10-21 Bending glass tube - eg for lighting systems Granted FR2108930A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7037968A FR2108930A1 (en) 1970-10-21 1970-10-21 Bending glass tube - eg for lighting systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7037968A FR2108930A1 (en) 1970-10-21 1970-10-21 Bending glass tube - eg for lighting systems

Publications (2)

Publication Number Publication Date
FR2108930A1 true FR2108930A1 (en) 1972-05-26
FR2108930B1 FR2108930B1 (en) 1976-04-16

Family

ID=9063048

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7037968A Granted FR2108930A1 (en) 1970-10-21 1970-10-21 Bending glass tube - eg for lighting systems

Country Status (1)

Country Link
FR (1) FR2108930A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2190745A1 (en) * 1972-06-27 1974-02-01 Philips Nv
EP3037392A3 (en) * 2014-12-22 2016-08-10 RONA, a.s. Glass product with shaped stem as well as method and device for its production

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491857A (en) * 1947-11-25 1949-12-20 Gen Electric Method and apparatus for coiling elongated vitreous stock
DE2010937A1 (en) * 1969-03-11 1970-09-24 Beriet Electronics Ltd., Toronto, Ontario (Kanada) Method and device for the production of graphic characters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491857A (en) * 1947-11-25 1949-12-20 Gen Electric Method and apparatus for coiling elongated vitreous stock
DE2010937A1 (en) * 1969-03-11 1970-09-24 Beriet Electronics Ltd., Toronto, Ontario (Kanada) Method and device for the production of graphic characters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2190745A1 (en) * 1972-06-27 1974-02-01 Philips Nv
EP3037392A3 (en) * 2014-12-22 2016-08-10 RONA, a.s. Glass product with shaped stem as well as method and device for its production

Also Published As

Publication number Publication date
FR2108930B1 (en) 1976-04-16

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Legal Events

Date Code Title Description
ST Notification of lapse