Title:
【発明の名称】受像管漏斗を製造する方法及びその方法を実施する装置
Document Type and Number:
Japanese Patent JP2002503629
Kind Code:
A
Abstract:
Funnels of picture tubes are typically produced by pressing a molten gob of glass in a mold using a pressing die and by using a ring resting on the mold and resiliently secured to the die, for molding a flat funnel upper edge. At the same time, through corresponding recesses in the mold, bearing faces, so-called pads for connecting the funnel adjustably to the picture screen, are molded onto the outer collar of the funnel. In order to attain an encompassing upper edge of constant width by recessing of the pads without an encompassing mold seam on the finished funnel, the mold is provided in the region of the pads with recesses, in which movable, flat molded parts that are flush with the upper edge of the mold can be placed, the thickness of the molded parts being determined in accordance with the extent of recessing of the pads and their radial length being determined such that they produce protrude into the mold cavity in accordance with the recessed upper edge of the pads to be molded on, and are arranged such that they can be moved out of the mold cavity after the funnel has been molded.
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Inventors:
Boat, Heinz-Geh.
Supershoe, Georg
Supershoe, Georg
Application Number:
JP2000532369A
Publication Date:
February 05, 2002
Filing Date:
January 27, 1999
Export Citation:
Assignee:
Carl-Zeiss-Stiftung
International Classes:
C03B11/06; C03B11/10; H01J9/24; (IPC1-7): C03B11/06; C03B11/10
Attorney, Agent or Firm:
Tadashi Hamamoto (1 person outside)