USRE23141E

USRE23141E - altamore

Info

Publication number: USRE23141E
Authority: US
Publication date: 1949-08-16

Description

Aug. 16, 1949. s. ALTAMORE 23,141

RECIRCULATING SYSTEM FOR GAS FIRED OVENS Original Filed 001:. 22, 1945 s Sheets-Sheet 1 Inventor 'lS Eaaar/ay A 4 ranch:

Attorneys Aug. 16, 1949. s. ALTAMORE v REGIRCULATING SYSTEM FOR GAS FIRED OVENS 3 She ets-Sheet 2 Original Filed Oct. 22, 1943 Inventor a-BM A Ito rn e];

3 SheetsSheet 3 Inventor SEBQSTm/JL 717M 05 Attorneys Reissued Aug. 16, 1949 UNITE'DL- -STATES PATENT OFFICE.

RECIRQULATING SYSTEM FOBeGAS OVENS Sebastian Altamore, Maspeth, N. Y; Original N0. 12,369,706, dated Feb1'uary. -20, 19.45,--

Serial No.-507,34'7, October .22, 1943..lApplica tionhfor.reissueFebrual-y 20,1946; Serial .l\ lo.,

'7 Claims. ,(Cl. 263- 8) This invention relates to newand useful im-...

provements in recirculating-systems. for ovens in, which work is heated.

The principal object of the present invention.

is to provide a. special recirculating system for heating ovens wherein .the .heat is equally dis-.,

tributed across the work.

Another important object; of the invention is .to. provide a special recirculatingunit for heating..-

ovens which will serve to recirculateheated air in a circular motion across the oven.

Other objects and advantages. of the invention... will become apparent .to the .readenof the, f01- lowing description.

In the drawings:

Figure 1 isa top. plan. .vi ew..of the improved-..

OVBII.

Figure 2 is afragmentaryyertical longitudinaL.

view .thro-ughthe oven. Figure 3 is, an outsideelevational.view..of one of the recirculating unit shown inrelationtoa,

section of the oven shell.

Figure 4 is an insideelevational view,- of the,

unit shown in Figure 3,. V

Figure 5 is an enlarged detailed sectional .view.

taken substantially on the line 5,-5 ofFigure 3.

Referring to the drawings wherein like numerals designate -like-parts-,--it can-"be seen that numeral 5 denotes an oven shell open at its end 6 and provided with a sloping end wall I at its opposite end. At the latter end of the shell 5,

the top has a hood!) from" which extendsa con duit 9 to a suction-blower Ill driven by an electric motor "H and from the outlet side of which rises a stack [2. Just under thehoodiB andWith-J.

in the shell 51s a bafifle platel 3.

Numeral M denotes a floor for the shell 5 over which travels the upper flight of an endless conveyer l5, the lower flight of which passes under the floor l4, and it will be observed in Figure 2, that the conveyor belt passes over suitable rollers or the like l6.

Cooling fans I! (motor driven) are located within the end 6 of the oven and this fan-means supplies cool air that travels just under the top of the shell 5 and is drawn to the opposite end of the shell 5 by the suction blower Ill acting through the hood 8.

The conveyer l5 carries work through the oven and in the path of circular activities of the air set up by heating and recirculating units each of which is denoted generally by numeral 18. This particular unit is shown clearly in Figures 3, 4 and 5.

substantially .faneshaped ,upwardly tapering con.

duitJZ which.passes.. through; theadjacent side. wall of, the ovenshelLiand terminates in a nar-. row,v elongated .mouth...2 3., nneledge of whichis. bent. outwardly to defineadeflector lip 24. .JIhe. mouth. 3. isLdisposedxertically. as clearly shown in Figllrei: .W

Through the lowerportion .of the same side wall of theshelli .and...for.the.sa1ne unit..l.8 an elon-... gatedmouth fi is pr0vided.. and, ha1f,..of said. mouthspecially;envelopssa.gas .burner.,26 having. a plurality of jets 21 and which has a fuels-sup.

plypipe-28. A flaredcondult- 29 connects the mouth .25 with theexhaust; or outlet-side of, the...

suction blower-fan 2H ofithisunit Ill. 7 It can .nowbe seen. that-.whenlthe units-.l-aare functioning, and vthe.vb irnerssfli. thereof are-in operation, thejblower ,fansl-lll ofthese :units-Will- 7. force the intake gases-across the-burners 26,- thusheating the air and ethersintake gasess The interior -of the .ovenshell'. .5. has curved bailie-platese-p, 30 in the ,corners :thereof .to. assistin causing .a turbulentaction.oiltheheated ;air and other gasesr as they pass in circulation...out.. of. the mouth =25 throughand againstthework located on the cone. veyer I 5 and -.-whiche;are.then. sucked...back; the .-t

unitlllby, way. of themouth 23..and conduit. 22.

This air is. recirculatedtimeand.again,-. each timehbeing.rel'leated.v

As shown in. Figs. 2,..theeintake-or inlet I mouths 23 are located -above....,t he .lconveyer,J5. --,ThB

broken rectangular figure in Fig. 5 indicates one of the work-pieces.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

1. A recirculating system for heating ovens comprising an elongated shell having an open inlet end, a unit at one side of the shell, said unit including a suction blower device, a suction mouth located within the shell and being in communication with the intake side of the suction blower device, an outlet mouth located within the lower portion of the oven and being in communication with the exhaust side of the suction blower de- Each unit 18 consists of a suction blower convice, and heating means within the last-mentioned mouth, and means for circulating cool air, longitudinally through the oven at the upper portion thereof comprising blowers at said open end of the shell and at the bottom thereof, and a forced draft air evacuating unit at the other end of the shell on top thereof.

2. An oven which has a support for the work which is to be heated, said oven having an ovenopening, said oven also having an oven gas outlet which is located above said oven-opening and said support, said oven gas outlet bein also longitudinally spaced from said oven-opening in a horizontal direction, gas-injection means associated with said oven-opening and operative to inject gas upwardly into said oven above said support at said oven-opening and longitudinally towards said oven gas outlet above said support, said injected gas being free to travel inwardly in said oven above said support towards said oven gas outlet, at gas-circulating device, said device having a gas-circulating inlet in said oven and a gas-circulating outlet in said oven and a heater and gas-circulating means to draw in gas at said gas-circulating inlet and to discharge gas through said gas-circulating outlet, said gas-circulating inlet being located above said support and said gas-circulating outlet and below said oven gas outlet, said gas-circulating inlet and said gas-circulatin outlet being located intermediate said oven-opening and said oven gas outlet in a horizontal direction, said gas-circulating inlet and said gas-circulating outlet being connected to said oven in a direction which is lateral to said horizontal direction to draw and to discharge gas in a direction which is lateral to said horizontal direction.

3. An oven according to claim 2 in which said gas-circulating inlet is located substantially directly above said gas-circulating outlet.

4. In combination, an oven which has a longitudinal axis, said oven having an air-inlet end at one end of said oven, said oven having another open end at the other end of said oven, conveyer means for conveying work-pieces through said oven, said conveyor means being spaced vertically iroin'the top and bottom of said oven, air-propellingnieans located at said air-inlet end and adapted to force a current or air into said oven at said aireinlet end and through said oven and above'said conveyer means towards said other end or said oven, a forced-draught evacuating unit which has an inlet port which communicates with said oven at the top of said oven at said other end, said unit being adapted and constructed to withdraw gases laterally from said oven at said inlet port, and an air-circulating device external to said oven and located at a side of said oven, said air-circulating device having an inlet pipe which has an inlet mouth which is located in said oven below the top of said oven in the path of said current of air, said air-circulating device having an outlet pipe which has an outlet mouth which is located in said oven below said conveyer means, and a heater located in said oven at said outlet mouth, said oven being closed between said ends save at said port.

5. A combination according to claim 4, in which said heater is an unshielded burner which has burner-jets which are located directly at said outlet mouth.

6. An oven which has a longitudinal axis, said oven having longitudinally alined oven-inlet and oven-outlet openings, a longitudinally movable and endless conveyor which has a longitudinal run which passes through said oven-inlet and oven-outlet openings, air-propelling means located at said oven-inlet opening, said air-propelling means being disposed and operative to produce a current of air which is upwardly directed at said oven-inlet opening and which moves longitudinally from said oven-inlet opening in a longitudinal path above said conveyor towards said oven-outlet opening, a suction device connected to said oven-outlet opening, a lateral gas-circulating device located longitudinally between said oven-inlet opening and said oven-outlet opening, said gas circulating device having a gas inlet which communicates with said oven above said run and having a gas outlet which communicates with said oven below said run, said gas inlet and said gas outlet being substantially superposed, said gas-circulating device having means to force gas through said gas-circulating device, said gas-circulating device having a heater to heat the gas which is circulated through said gas-circulating device.

7. An oven according to claim 6, said oven having a baflie at said outlet, said baflle being shaped to upwardly deflect the gas which issues from said outlet.

SEBASTIAN ALTAMORE,

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,129,634 Albright Sept. 13, 1938 2,230,800 Hormel Feb. 4, 1941