US1318187A

US1318187A - taliaferro

Info

Publication number: US1318187A
Authority: US
Publication date: 1919-10-07
Anticipated expiration: 1936-10-07

Description

T. L. TALIAFERRO.

DRYING OVEN.

APPLICATION FILED JAN-3.1919.

Patented Oct. 7, 1919.

3 SHEETS-SHEET I.

T. L. TALIAFERRO.

DRYING OVEN.

APPLICATION FILED JAN.3.19I9.

1,318,187. Patented Oct. 7,1919.

3 SHEETSSHEET 2.

illi

' particularly to a UNITED STATES PATENT. onsta THOMAS LUCIEZN' T ALIAIEZBBO, OF CHICAGO, ILLINOIS, ASSIGNOREO RHOENIX HEBMETIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

Danna-oven.

Specification of Letters Patent.

' Patented 0a. 7,1919.

Application filed January 3, 1919. Serial in. 269,452.

.To all whom it may concern:

Be it known that I, THOMAS LUCIEN TALIAFERRO, a citizen of -the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Drying-Ovens, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in dr ing ovens, and more rying oven whlch is adapted to dry lacquered or. coated sheets of metal.

An object of the invention is to provide a drying oven which shall be of comparatively few parts and of simple construction and at the same time the drying efficiency of the oven maintained.

A further object of the invention is to provide a drying oven wherein the casing forming a greater portion of the ,oven is made of corrugated metal covered with heat insulating material in such a way as to form air cells forincreasing the heat insulating efliciency of the oven.

A further object of the invention is to provide a novel means of supporting the casing on the frame work, so that 1t may be firmly attached to the frame work in a very simple and eflicient manner.

A still further object of the invention is to provide a heating oven ofthe above type, wherein the sheets of metal to be dried may be carried through the oven by an endless carrier supported within the oven so as to move horizontally as it carries its load and wherein the drying air or gases are conducted in and about the sheets so as to bring about an eflicient drying and baking of the coating on the sheets.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of the invention Figure 1 is a side view of an oven having my improvements embodied therein;

Fig. 2 is a longitudinal sectional view through a portion (if the oven, on an enlarged scale;

Fig. 2* is a detail "in section showing a portion of the corrugated casing and the heat insulating material applied thereto;

Fig. 3 is a transverse through the oven;

sectional view Fig. 4 is a view similar to Fig. 3, butshowmg a slightly modified form of the invention.

In carrying out my invention, I have provided a supporting frame on which the oven proper is mounted. The oven cons'ists of an elongated casing which is preferably circular in cross section and which is made of sheet metal corrugated so that the corrugations lie in transverse planes.

passing through the oven. At the upper end of the frame are angular brackets which are rlgldly attached to the frame and these angular brackets serve as seats for the lower edge of the metal casing forming the oven. On the outer face of the porrugated metal is placed an insulating material which ongages only the, extreme outer parts of the metal so as to form between the corrugated metal and the heat insulating material air cells which greatly increases the heat insulating efliciency of the oven. Each end of the oven is closed with an end plate except for an opening sufliciently large to permit an endless carrier to carry the sheets into,

through and out of the oven. Mounted on the frame is a pan which closes the bottom of the oven. At, suitable places in the lower region of the oven are burners or other suitable heating means, so that the drying air which is circulated through the oven may-be raised to a proper temperature to and they are connected adjacent their upper I ends by angle brackets 4-4 which extend from end to end of the oven; Mounted on these angle brackets 44 is an elongated casing 5 which is formed of corrugated metal. The casing is circular in cross seetion and the corrugations lie in planes ex-.

tending transversely of the casing. The,

lower ends of the casing 5 are mounted on the respective brackets 4-4 and are secured thereto in any suitable way.

losed by a pan 9 to end of the oven Covering the metal casing 5 is a layer of heat insulating material 6 formed of asbestos or any other suitable material and this layer of heat insulating material comes into contact with the outer 'faces 7 of the corrugations in. the casing 5, see Fig. 2. As a resultthere are a serles of air cells 8 formed between the metal casing and the heat insulating material. Inasmuch as the heat insulating material only lies against the extreme points of the corrugations, these air cells extend throughout a greater portion of the outer surface of the casing, and the air cells form a very eflicient heat insulating means for preventing the heat of the over'f'from esca ing through the s1de walls of the oven. T e lower part of the oven is which extends from end and is formed with side walls 10-10 which extend upwardly and are preferably bent over the angle brackets 4 4. Mounted on each leg 2-2 is an m wardly projecting bracket 11 and the s1de walls 10 of the pan extend from one bracket 11 to the next adjacent bracket.

The sheets to be dried are carried through the oven by an endless carrier 12 whlch is in the form of two endless chains having attached to each link a rigidly extendlng arm 13 between which the sheets are placed. These arms 13 extend vertically as they pass through the oven, as will appear from Fig. 1 of the drawings and the sheets being placed between the adjacent arms will be carried invertical position through the oven. Mounted on the brackets 11-11 are rods 14. There is one rod at each side of the conveyer 12 and the conveyer links rest on these rods which serve as a supporting means to hold the conveyer horizontal as it passes through the oven. The oven is closed by end walls 15, each of which is formed with an opening 16 of sufficient size to permit the sheets to pass into, through and out of the oven.

As a means for heating the oven, I have. provided steam pipes 17 and steam may be admitted, through the pipe 18 and discharged through the pipe 19. These steam pipesare located directly above the pan 9. Mounted on the brackets 11,11 are horizontal partitions 20, which serve to close off the upper part of the oven from the lower part, so that the circulating air or gases will pass up through the conveyer in and about the sheets carried thereby. As a means for circulating the air through the oven, I have provided intakes 21 and located in each intake is a burner 22 which heats the air and causes it to rapidly rise through the intake. I also provide each intake with a spray nozzle 23, whereby a spray of steammay be introduced with the air to temper the air. At a number of places throughout the oventhere are outlets 24, which are connected with a ventilating drum 25, which in turn-may be connected to a suitable stack. The air passes up through the oven and outthrough the outlet openings into the drum and thence to the stack.

It will be understood, of course, that other means for causing the air to circulate through the oven ma be used without departing from the spirit of the invention and other devices for heating the air may be substituted for those referred to above.

In Fig. 4 of the drawings, I have shown a slightly modified form of heating means for the oven. In this form of the invention there are curved artitions 26 which are substantially parallel with the casing 5, and there is one at each side of the oven. These partitions extend upwardly to a point well above the sheets which are to be dried. In the spaceformed by the partitions and at each side of the oven there is a gas burner 27 which extends longitudinally of the oven. Extending through the side walls of the oven are openings 28 through which air may pass into the space between the partitions and the casing where it is heated and thus caused to rise into the upper part of the oven. The top of the oven is closed and the air will therefore pass down between the sheets into the lower part of the oven and thence through an outlet 29 into a receiving chamber 30, which may be connected with the stack. By this arrangement of the heating devices, the sheets are subjected directly to the influence of the dry heated ases and also indirectly to the heat radiating from the artitions 26.

From the a ove, it will be apparent that I have provided. an oven which consists of very few parts and which is very simple in construction, the greater portion of the oven cons1st1ng of sectlons of sheet metal curved and corrugated and resting on the angle brackets where the sections arefirmly held. The remainder of the oven consists of the supporting frame, the pan for closing the bottom of the oven and the end walls with openings through which the sheets are carried into the oven and out of the oven after they are dried. These parts maybe very cheaply made and when assembled form a very eflicient oven. The covering of the corrugated metal with the heat insulating materlal forming the air cells provides a heat insulating means which is very much more eflicient than could be accomplished by the use of the heat insulating material alone, and, furthermore, these air cells are formed with little or no extra expense in the construction of the oven except for the corrugating of the sheets which form the structlon of casing and arrangement of heat the-heat of the air or gases coming directly in contact with the coated surfaces causing the particles of the lacquer to be thoroughly fused or amalgamated, thus forming a hard protecting surface on the metal.

and having its ends resting on and secured;

to said angular brackets, a heat insulating material covering said casing and contacting with the extreme outer portions only of the corrugations, a pan extending fromend to end of the ovencarried by the frame and closing the lower part of the oven, end plates for closing the ends of the oven,-fsaid end plates having openings formed therethrough to permit the lacquered sheets to'be carried into and out ofthe oven, an endless conveyer for carrying the sheets in vertical While I have referred to my'oven as a q)osition through the oven, and means for drying oven, it will be understood that, in connection with drying of lacquered sheets of'metal, it is more particularly a baking oven and the maintaining of the heated gases at a uniform temperature is very material to the eflicient carrying out of the process of baking the lacquer. By my improved coninsulating material, I am able to secure .a proper temperature for baking the lacquer in an efficient manner and also to maintain said temperature substantially uniform throughout the entire region of the oven.-

It is obvious that minor changes in the details of construction. and the arrangement of the parts may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure Letters Patent, is:

1. An oven for baking lacquered sheets comprising a supporting frame, an elongated casing of corrugated metal having corrugations extending transversely of the casing,

said corrugations being curved in cross seccomprising a supporting frame, an elongated casing of corrugated metal substantially circular in cross section and having thecorrugations extending transversely of the casing, heat insulating material'covering said casing and contacting with the extreme outer portions only of the corrugations, whereby a plurality of aircells are formed between the'met-al and the heat insulating covering material, and means for heating the interior of said oven.

3. An oven for baking lacquered sheets comprising a supporting frame, an angle bracket extending longitudinally of the oven at each side of the upper part of the frame, an elongated casing of corrugated metal, said casing being circular in cross section comprising a supporting frame, angular brackets at each side of the frame at the upper ends thereof, an enlongated casin'g of oven and carried 'by' said frame, .said pan 'having side walls extending upwardly to said anglilanbrackets, horizontal partitions within said oven, the inner edges of .saidpartitions being spaced from each other, brackets within the oven carrying said partitions, end walls-for closing the oven, each end wall having-an opening through which the lacquered sheets are adapted to ass, an

endless conveyer passing through t e oven, rods carried by the brackets within the oven' and supporting the endless conveyer, andmeans for heatlng the interior of the oven. 5. An oven for baking lacquered sheets comprising a supporting frame, an angle bracket extending longitudinally of the oven at each side of the upper part of the frame, an elongated, casing of corrugated metal, said caslng being circular in cross section and having its ends resting on and secured to said angular brackets, a heat insulating material covering said casing and contact-' ing with the extreme outer portions only of the corrugations, a pan extending from end to end of the oven carriedby the frame and closing the lower part of theoven, end.

plates. forclosing the ends of the oven, said end plates having openings formed therethrough to permit the lacquered sheets to be carried into and out of the oven, an endless conveyer for carrying the sheetsin vertical position through the oven, means for heating the interior. of the oven, means foradmitting air to the lower part of the oven, and means whereby the heated air is taken ofl at the upper part of the oven.

6. An oven for baking lacquered sheets comprising a supporting frame, .angular brackets at each side of the frame at the upper ends thereof, an elongated casingof corrugated metal, said casing-being circular in cross section and having its ends resting upon the angular brackets and secured there- 'to, a heat insulating material covering said casing and contacting with the extreme outer portions only of the corrugations, a-pan extending from end to end of the oven and carried by said frame, said pan havingtside walls extending upwardly to said angular brackets, horizontal partitions within said oven, the inner edges of said partitions being spaced from each other, brackets within the oven carrying said partitions, end walls for closing the oven, each end wall havin an opening through which the lacquered sheets are adapted to pass, an endless con' veyer passing through the oven, rods carrled by the brackets Within the oven and support ng said endless conveyer, means for heating the interior of the oven, means for admitting air to the lower part of the oven, and means whereby the heated air is taken oil at the upper part of the oven.

In testimony whereof, I aflix my signature.

THOMAS LUGIEN TALIAFERRO.