Method for capping an electric lamp

H - Electricity – 01 – J

Patent

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Details

H01J 9/34 (2006.01) H01J 5/58 (2006.01) H01J 61/32 (2006.01)

Patent

CA 2340136

The invention relates to a method for capping an electric lamp which has a lamp cap with at least one thermoplastic synthetic cap part (21). In particular, the invention relates to a method for cementless capping of a compact fluorescent lamp. According to the invention, the lamp vessel (1) is sealed with the aid of the thermoplastic synthetic cap part (21) by heating sections (101, 102) of the lamp vessel (1) above the softening point and preferably above the melting point of the thermoplastic, and introducing them into constricted cutouts (210) in the thermoplastic synthetic cap part (21). The heated lamp vessel sections (101, 102) soften or melt and displace the synthetic material in the region of the constricted cutouts (210). The lamp vessel (1) is embedded in the set synthetic in a self-closed fashion after the polymer melt has been allowed to set.

L'invention concerne un procédé permettant de culotter une lampe électrique présentant un socle avec au moins une partie de socle thermoplastique. L'invention concerne notamment un procédé permettant de culotter un tube fluorescent compact sans mastic. Selon l'invention, le tube de la lampe (1) est soudé par fusion avec la partie de socle thermoplastique (21), du fait que des sections (101,102) dudit tube (1) sont portées à des températures supérieures à la température de ramollissement et de préférence supérieures à la température de fusion du thermoplastique et sont introduites dans des passages (210) rétrécis de la partie de socle thermoplastique (21). Les sections (101,102) chauffées du tube de lampe se ramollissent et fondent, puis déplacent la matière plastique dans la zone des passages (210) rétrécis. Après solidification de la matière plastique fondue, le tube de lampe (1) est noyé par liaison de forme dans la matière plastique solidifiée.

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