Glassrod elongation heating furnance having double bellows

Details Glassrod elongation heating furnance having double bellows Glassrod elongation heating furnance having double bellows

1998-10-20

2000-10-31

Hoffmann, John

Glass manufacturing

Fiber making apparatus

With drawing means

117215, 117218, C03B 37029

Patent

active

06138481&

ABSTRACT:
In a heating furnace which holds at least one end of a glass rod with a holding portion and elongates the glass rod by softening the glass rod successively from the other end portion thereof with heating while applying a tensile force thereto, the heating furnace comprises a tubular portion through which the glass rod to be elongated is inserted such as to be longitudinally movable; heater, positioned within the tubular portion such as to circumferentially surround the glass rod, for heating the glass rod; a moving portion through which one end of the glass rod is inserted; bellows the ends of which are respectively secured to the moving portion and the tubular portion and which is longitudinally expandable and contractible and composed of at least a double cylinder surrounding the part of the glass rod such as to block an outside air from flowing into the heating furnace; and gas supply line for supplying, for purging, an inert gas into a space within the tubular portion and the inner bellows as well as the space between inner and outer bellows.

REFERENCES:
patent: 4201746 (1980-05-01), Burd
patent: 4204856 (1980-05-01), Yigdall
patent: 4360499 (1982-11-01), Gubitose
patent: 4824514 (1989-04-01), Ostrog
patent: 4906268 (1990-03-01), Lane

Affiliated with

Also associated with

Rating

Glassrod elongation heating furnance having double bellows does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Glassrod elongation heating furnance having double bellows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Glassrod elongation heating furnance having double bellows will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2039695