Title:
GLASS FUNNEL AND GLASS BULB FOR CATHODE RAY TUBE
Document Type and Number:
WIPO Patent Application WO/2002/047107
Kind Code:
A1
Abstract:
A glass funnel for cathode ray tube, wherein the wall thickness (S) of the seal edge face (3c1) of a funnel (3) is set generally equal to the wall thickness (S') of the seal edge face (2b1) of a panel (2), the body part (3e) of the funnel (3) in an area excluding a corner part comprises a first area (3e1) of a dimension (h) extending from the seal edge face (3c1) in the direction parallel with a tube axis (Z) and a second area (3e2) excluding the first area (3e1), and the wall thickness of the second area (3e2) is smaller than the wall thickness of the first area (3e1) and thus the boundary part between both areas forms a step part (3e3) on the external surface of a body part (3e).
Inventors:
KYONO MASAYA (JP)
KAKIGI HIROSHI (JP)
KAKIGI HIROSHI (JP)
Application Number:
PCT/JP2001/010758
Publication Date:
June 13, 2002
Filing Date:
December 07, 2001
Export Citation:
Assignee:
NIPPON ELECTRIC GLASS CO (JP)
KYONO MASAYA (JP)
KAKIGI HIROSHI (JP)
KYONO MASAYA (JP)
KAKIGI HIROSHI (JP)
International Classes:
H01J9/26; H01J29/86; (IPC1-7): H01J29/86
Foreign References:
| JPS6372838U | 1988-05-16 | |||
| US4030627A | 1977-06-21 | |||
| JPH11120938A | 1999-04-30 | |||
| GB2342496A | 2000-04-12 | |||
| JPS62142148U | 1987-09-08 | |||
| JPH1186754A | 1999-03-30 |
Attorney, Agent or Firm:
Ehara, Syogo (Edobori 1-chome Nishi-ku Osaka-shi, Osaka, JP)
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