Patent ID: 6527547
Filing Date: 2003-03-04
Classification: H01J

Abstract:
An oven for sealing a panel to a funnel, thus forming an envelope suitable for use in a display tube, the oven comprising a tunnel structure, means for heating and circulating gas(es) inside the tunnel structure, and at least one mount for conveying an assembly of a panel and a funnel through the tunnel structure, characterized in that the tunnel structure (9) is provided with a longitudinal slot (16A) and the mount comprises first components for carrying an assembly of a panel and a funnel, which first components, at least during sealing of the panel to the funnel, are placed inside the tunnel structure (9), and second components for guiding the first components through the tunnel structure, which second components are placed outside the tunnel structure and support the first components, via the longitudinal slot (16a), wherein said second components comprise a means for flushing the interior of the assembly (22) with a fluid obtained from a source which is substantially separated from the gas(es) circulating in the oven (1).