EP 0809272 A1 19971126 - Shadow mask frame of a cathode ray tube, method of fabrication and mounting means for a mask frame
Title (en)
Shadow mask frame of a cathode ray tube, method of fabrication and mounting means for a mask frame
Title (de)
Lochmaskenrahmen einer Kathodenstrahlröhre, Verfahren zur Herstellung und Aufhängung für den Rahmen
Title (fr)
Cadre de masque perforé d'un tube à rayons cathodiques, son procédé de fabrication et élément de suspension d'un cadre de masque perforé
Publication
Application
Priority
FR 9606366 A 19960522
Abstract (en)
A shadow mask frame for a CRT, especially a colour television tube, has its sides (30a-d) formed by mutually offset and fixed external and internal membranes (31, 32), each of which consists of a portion of a thin metal strip.. A method of making a shadow mask frame involves (a) cutting one or more thin metal strips to form first and second membranes (31, 32); (b) forming reinforcing grooves or impressions in the membranes; and (c) assembling the frame by welding the membranes together. Also claimed is a suspension element for a shadow mask frame, the frame preferably being made of a high elastic limit metal selected from maraging steels, 25% Ni/15% Cr steels containing Ti and Al, Fe-Ni alloys, Ni base superalloys and martensitic stainless alloys.
Abstract (fr)
Le cadre (30) comporte des côtés plats (30a, 30b, 30c, 30d) disposés suivant des faces latérales d'une surface prismatique droite. Les côtés (30a, 30b, 30c, 30d) du cadre (30) comportent une membrane externe (31) et une membrane interne (32) rapportées et fixées l'une contre l'autre et constituées chacune par une portion de bande métallique mince de préférence renforcée par des nervures. Les dispositifs (34) de suspension du cadre (30) dans l'enveloppe de verre du tube à rayons cathodiques peuvent être fixés par clipsage ou par soudage sur des parties d'angle (33) du cadre (30). <IMAGE>
IPC 1-7
IPC 8 full level
H01J 9/46 (2006.01); H01J 9/14 (2006.01); H01J 29/07 (2006.01)
CPC (source: EP KR US)
H01J 9/02 (2013.01 - KR); H01J 29/073 (2013.01 - EP US); H01J 2229/0705 (2013.01 - EP US)
Citation (search report)
- [A] US 5072150 A 19911210 - LEE WOO-JONG [KR]
- [A] FR 2184899 A1 19731228 - RCA CORP [US]
- [A] GB 2097996 A 19821110 - PHILIPS NV
Designated contracting state (EPC)
AT BE DE ES FR GB IT NL PT
DOCDB simple family (publication)
EP 0809272 A1 19971126; EP 0809272 B1 20030502; AT E239301 T1 20030515; BR 9709344 A 19990810; CA 2255568 A1 19971127; CN 1088907 C 20020807; CN 1169585 A 19980107; DE 69721375 D1 20030605; DE 69721375 T2 20040325; EP 0999571 A2 20000510; EP 0999571 A3 20020102; FR 2749104 A1 19971128; FR 2749104 B1 19980828; HU P9902464 A2 19991129; HU P9902464 A3 20020228; JP 2000509550 A 20000725; JP 3704545 B2 20051012; KR 100449785 B1 20041203; KR 970076967 A 19971212; PL 330077 A1 19990426; RU 2184405 C2 20020627; TW 428195 B 20010401; US 5898259 A 19990427; WO 9744806 A1 19971127
DOCDB simple family (application)
EP 97401086 A 19970515; AT 97401086 T 19970515; BR 9709344 A 19970522; CA 2255568 A 19970522; CN 97113713 A 19970522; DE 69721375 T 19970515; EP 00103229 A 19970515; FR 9606366 A 19960522; FR 9700899 W 19970522; HU P9902464 A 19970522; JP 54172697 A 19970522; KR 19970019846 A 19970521; PL 33007797 A 19970522; RU 98123040 A 19970522; TW 86106727 A 19970520; US 86108197 A 19970521