GB1381214A – Method of manufacturing a tubular lamp envelope
– Google Patents
GB1381214A – Method of manufacturing a tubular lamp envelope
– Google Patents
Method of manufacturing a tubular lamp envelope
Info
Publication number
GB1381214A
GB1381214A
GB2977373A
GB2977373A
GB1381214A
GB 1381214 A
GB1381214 A
GB 1381214A
GB 2977373 A
GB2977373 A
GB 2977373A
GB 2977373 A
GB2977373 A
GB 2977373A
GB 1381214 A
GB1381214 A
GB 1381214A
Authority
GB
United Kingdom
Prior art keywords
tube
jig
bending
curved
members
Prior art date
1972-06-27
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.)
Expired
Application number
GB2977373A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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.)
1972-06-27
Filing date
1973-06-22
Publication date
1975-01-22
1973-06-22
Application filed by Philips Electronic and Associated Industries Ltd
filed
Critical
Philips Electronic and Associated Industries Ltd
1975-01-22
Publication of GB1381214A
publication
Critical
patent/GB1381214A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
1381214 Bending glass tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 22 June 1973 [27 June 1972] 29773/73 Heading C1M In the manufacture of a tubular lamp envelope of which the glass tube 1 or 13 is curved in a flat plane over at least a part of its length; an initially straight tube 1 or 13 is softened by heating and then curved around a bending jig 5, 6 or 16 by co-operation with one or more bending members 2, 3 or 14, 15; is inflated as by puffs p, p to a substantially circular crosssection and then cooled, the curved tube being in, or being given, a horizontal position during at least the greater part of the period of cooling to a temperature at which deformation due to gravity does not occur and the bending members 2, 3 or 14, 15 being removed as soon as the inflation operation has been carried out and the tube is horizontal. Preferably curving is effected with the tube horizontal. In both constructions disclosed, the bending jig 4 or 16 is divisible into two parts 5, 6 and (21, 22) in the plane of the tube and according to Fig. 2, the jig 4 and curved tube 1 are supported in the horizontal position by a plate 7 with an aperture 8, very slightly larger than the jig, so that both parts 5 and 6 of the jig 4 can be removed, as well as the bending members 2, 3, for re-use in further operations, while the tube 1 on the plate 7 continues for further treatment. According to Fig. 3, one part (21) of the jig acts as a supporting plate so that only one part (22) can be reused immediately. In both cases, the support plate 7 or jig part (21) is provided with pivoted holding members 11, 12 which can be hooked over the ends 9, 10 of the tube 1. The bending members may be tongs 2, 3 or rollers 14, 15.
GB2977373A
1972-06-27
1973-06-22
Method of manufacturing a tubular lamp envelope
Expired
GB1381214A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
NL7208818A
NL7208818A
(en)
1972-06-27
1972-06-27
Publications (1)
Publication Number
Publication Date
GB1381214A
true
GB1381214A
(en)
1975-01-22
Family
ID=19816384
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2977373A
Expired
GB1381214A
(en)
1972-06-27
1973-06-22
Method of manufacturing a tubular lamp envelope
Country Status (9)
Country
Link
JP
(1)
JPS51394B2
(en)
BE
(1)
BE801417A
(en)
BR
(1)
BR7304699D0
(en)
CA
(1)
CA1024743A
(en)
FR
(1)
FR2190745B1
(en)
GB
(1)
GB1381214A
(en)
IN
(1)
IN138583B
(en)
IT
(1)
IT986573B
(en)
NL
(1)
NL7208818A
(en)
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2108930A1
(en)
*
1970-10-21
1972-05-26
Claude
Bending glass tube – eg for lighting systems
1972
1972-06-27
NL
NL7208818A
patent/NL7208818A/xx
unknown
1973
1973-06-02
IN
IN1296/CAL/73A
patent/IN138583B/en
unknown
1973-06-20
CA
CA174,515A
patent/CA1024743A/en
not_active
Expired
1973-06-22
GB
GB2977373A
patent/GB1381214A/en
not_active
Expired
1973-06-22
IT
IT68875/73A
patent/IT986573B/en
active
1973-06-23
JP
JP48071241A
patent/JPS51394B2/ja
not_active
Expired
1973-06-25
BE
BE132703A
patent/BE801417A/en
unknown
1973-06-26
FR
FR7323345A
patent/FR2190745B1/fr
not_active
Expired
1973-06-26
BR
BR4699/73A
patent/BR7304699D0/en
unknown
Also Published As
Publication number
Publication date
DE2329071B2
(en)
1976-09-16
JPS4964277A
(en)
1974-06-21
JPS51394B2
(en)
1976-01-07
CA1024743A
(en)
1978-01-24
FR2190745A1
(en)
1974-02-01
BE801417A
(en)
1973-12-26
BR7304699D0
(en)
1974-08-22
NL7208818A
(en)
1974-01-02
DE2329071A1
(en)
1974-01-10
FR2190745B1
(en)
1978-07-21
IN138583B
(en)
1976-02-28
IT986573B
(en)
1975-01-30
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Legal Events
Date
Code
Title
Description
1975-06-04
PS
Patent sealed [section 19, patents act 1949]
1984-02-22
PCNP
Patent ceased through non-payment of renewal fee
