US1533298A - Annealing furnace and leer - Google Patents

Description

April 14, 1925.

. w. o. AMSLER ANNEALING FURNACE ANT) LEER Filed June 5, 1921 2 Sheets-Sheet l April 14, 1925.

W. O. AMSLER ANNEALING FURNACE AND LEER 2 Sheets-Sheet 2 Filed June 3, 1921 Patented Apr. '14, 1925.

' ToaZZ'iohmitmmy UNI-TanfsT TEs.

O. AMSLEB, OF PITTSBURG H, PENNSYLVANIA.

I mmme rnmmen AND LEEB.

concern Be it known that I, Warm O. Anaem a, a citizen of. the United States, residing at Pittsburgh, in the county .of Allegheny and l the heatin State of Pennsylvania, have invented certain new and useful'lmprovements in Annealing Furnaces andrLeers, of which the following is a specification.

This invention relates to an annealing oven or leer for treating glassware, and particularly to a leer having an arrangement .of flues therein for 5 effecting the proper distribution of heat. I

In Ieers of this type there is usually provided I a relatively short heating chamber whichis maintained at a relatively high temperature, and" a tunnel-like structure communicating therewith. The temperature of the tunnel is graduated so that the discharge: end most remote from-the heating chamber is relatively cool. p

:The glassware is introduced at the end of chamber opposite the tunnel. It is desira le that the glassware'be moved immediately into a temperature sufliciently high to relieve all internal stress in the glass articles. Owing to the fact that the end. of the heating. chamber into which the articles are introduced is usually open, the temper: ature at the 'pointof introduction is considerably: lower than the desired temperature.

Furthermore,-because it has usually been the practice-to deposit the articles in a row .on a stationary shelf 'atone end of the leer and push the row forwardly onto a conveyor, the articles remained for-some time at the point of introduction where the heat was not suflicientto revent cracking and breakin ofth'e artices." t is an-object of the present invention to provide a heating chamber and a combustion chamber with an interposed muflle in which the end of the heating chamber at which the articles are introduced may be maintained atahihtem erature.

Furt er ob ects of the invention are to provide a leer in which the end of-the heat- -'mgv chamberis closed, the portion of the wall closing the end preferably providing a flue for the circulation ofheateigases about the extreme end of the heating chamber;

'andto provide means whereby the'articles maybe introduced into the 'heating'chamber at one end thereof through the si e My invention may be understood by refe ;v

"Application filed June a,

.formed of tile or blocks having 1921. Serial rm. 474,691.

the accompanying drawings, in

of some of the fines;

Fig, 2 is. a vertical section on line II-Il of Fig. 1; and t Fig. 3 is a horizontal section through the leer shown in Fig. 1, a portion of the section' being above the leer conveyor and a portion below the level of the leer conveyor.

In the drawings A represents broadly the heating chamber; l3 is the tunnel; C, an end- I less conv'eyor having the receiving end thereof supplorted on wheels or a roller-D.

The jeating chamber has' an outside wall 5 and an arched inner wall or mufile 6. The

top of the muflle,.which is preferably made of pannelled tile, as shown, is spaced from the top of the outer wall, while the downwardly extending sides 7 of the mlifile are channels therein, as shown in Fig. 2, the sides of the channels contacting with the wall 5 to form a plurality of vertlcally extendingside flues 8. At 9 is a partition extending across the. space formed between the wall 5 and the wall 6 to divide the space into a combustion chamber 10 and an exhaustchamber 11, the length of the former being much greater than the length of the latter;

Beneath the conveyor O is a tile floor 12 supported above the bottom wall 13 of the heating chamber. Transverse walls 14 and spectively, of the' space 16 between the floor' 12 and bottom wall 13. The flues 8 terminate in and open into space 16, at B and 8", as shown in Fig. 3. 7

Projecting transversely. from the sides 5, part way across the space 16 and opposite each other, are baflle walls 17 one of which is clearly shown in Fig.3. At the end of the wall 17 is a lon tudinally extendin wall 18, and parallel therefrom in order to form longitudinal flues, are partitions 19. At 20 and 21 are relativelysmall sections of partitions for forming a series of short fines, At 22 and v full-length and hence the fines 8 in this por-' tion of .the wall do not communicate directly thereto, but space with the space 16,'but, as shown in the broken away portion of'Fi 1, the various flues communicate at this sages 8 with flue 8. I The end wall of the leer is indicated at 24, and has an opening therein in which may, through a door' 25, be operated a pusher, not shown, for moving the articles onto the conveyor after they have beenmoved into po nt through pas:

the heating chamber, as hereinafter described. 'The end wall serves to closethe combustion chamber and the upper portion of the mufile chamber, but does not extend throughout the height of the -leer, its lower end terminating above thebase of the 0011" struction. 'At26 is a horizontal wall at the bottom of the end wall 24, and at 27 is a portion of the bottomof the mufiie. chamben A transversely extending flue 28' is provided by this construction, which fluexconnects with the last of the vertical lines 8at each side of the'leer, as clearlyshown in Fig. 3.

- At 29 isa vertical flue communicating with flue'28 and with the forwardly extendin underground flue 30. The forward 'the'flue 230- communicates with 21. transverse underground flue 3I' which,

end 0 through vertical conduits 32, communicate with one of the vertical flues 8 that termi nate at 8. at each side ofthe heatin chamber. A damper is preferably. provided in flue 29 at 29. .Those of the fines 8 which terminate at 8'? communicate with exhaust chamber 11. Supported on the top of the .oven over the chamber 11, with which it communicates; is a chimney 33, inwhich are preferably placed dampers 34. Near the rear end of the top ofthe combustion chamber 1 0. is a burner or supply at 36 are openings through which the artia pipe for heated or combustible gases,"35., V In the side walls of the. heating chamber cles of. glassware are introduced on a con "veyoror chute 37. From the conveyor 37,

the articles are pushed forwardly onto shelf 38, and from there onto theconvey'or C.

In opera-tiomcombusti'on is effected in the chamber 10. The burner 35, being-nearthe ..rear of the heating chamber, most of the heated gases go down those of the dues 8 nearest the receiving end of the leer, and through the passages 89, flue 8 and into the chamber 16. 'These gases pass tra'ns versely' across chamber 16 along'therear wall thereof, then forwardly along the central longitudinal flues inlchamber 16, and

J at the forward end of the chamber arefie- 'flected rearwardly into the pockets formed .at the front sides of bafiie walls .17, and into the vertical flues 8 at 8 Thus, they heat 7 most intensely the portion 'of .the 'muflie chamber at'the top, sides and bottom over the're'ceiving end of the conveyor, especially portion adjacent the supporting where, by reason of the bafiles ,17, they. circate with the combustion chamber and those 1 raaaaeaj culate to heat the' bottom of the muffle chambernear the sides of the oven, and then pass into the longitudinal flues to mingle withthe other gases; The gases passing down the rearmost flue 8 at each side of the v heating-chamber into flue'8,'heat the end of thehe'ating chamber. Then they pass down flue 29 through fiues 30, 31- and 32 to mingle with the other gases, which all pass up into chamber ll'and out the chimney 28. 4 f -This arrangement of flu'escauses the receiving end of the heating or muffle chamber to be most-intensely heated and to be maintained at a. sutficiently high degreeof temperature to overcomethe internal stress of I the articles of glassware as they .are introduced. It also provides :for a gradual re duction in the temperature from the re ceiving end forwardly tothe tunnel B.

What I claimisr I 1. *A heating chamber for ,lee'rs comprising an outer wall, an inner wall enclosing a mu flie chamber, said inner wall being'sp'aced from the outer wall, at thetop and bottom, vertical flues at thesides of the inner wall communicating with the spaces above and belowthe mufiie chamber, a partition dividing the upper-space into a combustion chamber and an exhaust chamber,- baflie walls arranged longitudinally .in the space.

below the muffle chamber along the central portion thereof and of less length thanthe' mufiie chamber; transverse baflies in the space extending from the sides inwardly between the vertical side flues which co1nmuni-- {)vhich communicate with the e'xhaust' cham- 2. A heating chamber forleers comprising an outer wall, an inner-wall enclosing a mu iile chamber, said inner wallpbein spaced from'the outer wall at the to an and bottom, vertical fiuesat. the si es of the inner wall' communicatin with the spaces above and below the m. e'chamber, a partition dividing theupper space-into acon 1bustio1 1 chamber and anexhaust chamher, {and baflles arrangedinfthe space be:

low the -inuflie' chamber for directing some "of the gases coming through someof the vertical fiues communicating with the combustion chamber rearwurdly and than for- .wardly, and then rearwardly to thos'efof th vertical flues which, communicate with the exhaust'chamber. f

3. A heating chamber for leers comprisih anlouter wall, an inner wall, which inner wal encloses a mufiie chamber, means for circulating heated gases between the inner and outer walls, means for introducing articles at' the side of the muflie. chamber, and 130 means for circulating the heated gases around the muflie chamber to the rear of the point where the articles are introduced into the muflie chamber.

4. A heating chamber for leers comprising an outer wall, an inner wall enclosing a mufile chamber, an endless conveyor in the ing an outer wall, an inner wallenclosing a: mufiie chamber, an endless conveyor in the pasage connecting the lower ends of those chamber, supporting wheels for the con- 'ber formed above and below the muflie chamber between the walls,'the upper chamber extending rearwardly over the wheels while said lower chamber extends only to the wheels, vertical flues betweenthe walls communicating with the upper and lower chambers, the vertical flues adjacent the Wheels not opening into said lower chamber, and a passage connecting the lower ends of those flues adjacent the wheels with a flue communicating with the lower chamber so that the portion of the muflle chamber adjacent the wheels may be heated.

6. A heating chamber for leers comprischamber, wheels in the chamber at one end thereof for supporting the conveyor, achamber formed above and below the muflle chamber between the walls, the upper chamber extending rearwardly over the wheels while said lower chamber extends only to the wheels, vertical flues between the walls com municating with the upper and lower chambers, the vertical flues adjacent the wheels not opening into said lower chamber, and'a an outer wal, an inner wall enclosing a.

muiiie chamber, an endless conveyorin the chamber, supporting wheels for the conveyor near one end of the mufile chamber, a'

chamber above and below the muflie chamber and between the outer and inner walls, flues between the walls communicating with the upper and lower chambers, means for,heat-' ing the portion of the walls adjacent the supporting wheels, and means for heating the portion of the muflle chamber to the rear of the wheels.- 7

8. In an annealing furnace, the combination of an annealing chamber, a carrier for articles to be annealed consisting of an endless belt carried on a drive wheel, the said drive wheel being arranged beneath and extending through an opening in the floor of and into. said annealing chamber; and the side walls and roof of the annealing chamber overhanging said drive wheel, the belt of the carrier from its point of tangency with its drive wheel extending wholly within the annealing chamber, and a muffle chamber enveloping the walls of the annealing chamber and envelopin the overhanging "'portion of the roof and slde walls of the annealing chamber. 9. In an annealing furnace, aleer chamber havin a carrier for thearticles to be treated and a sprocket-wheel for the carrier located outside its entrance end, main side flues for the leer chamber, and a supplemental flue contiguous to the sprocket wheel and communicating with one of said main flues. In testimony whereof I afiix my signature in presence of two witnesses. v WALTER O. AMSLER. Witneses: i

W. G. Doommn, Lore Wmnm.

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