US1555304A - Enameling oven - Google Patents

Description

J. A. MELLER ENAMELING OVEN Sept. 2929 i925.

Filed Novv 14 1921 1 1 e l |l fil Patented Sept. 29, 1925.-

UNITED STA TES JOHN al mmm, or amr'rown, N'nw Yoan, Y' ovmf. l

Application alga iv'mber 14, im. f strati n. :$15,199.v l

To all whom it may concern.:-

Be it known that I, JOHNVA. Minima', a citizen of the United States of America,

'and a resident o Tarrytown, county of Westchester, and State. of -New York, have invented certain new anduseful Improvements in Enameling Ovens, of which thefollowing is a full, clear, concise, and exact description, such as will enable othersskilled in the art to' which the invention relates to make andY use the same, reference .being made therein to the accompanyingdrawings,

orV baking operation without materially 'in-4 terfering with'or detracting from, `the aiy the provision ofa baking oven that iiicheapw to manufacture,l easily assembled, i1s coin-V `on vehicles,parts thereof, and other objects that have been subjected to a coating process. Another objectv of the invention 1s the y,provision of means for removing the gases, odors, and impuritiesincident to thedrym'g or baking| of thecoating during the drying ciency ,of the heating arrangement-y j .A still furtherA object' of the invention is posed of few parts, thati is simple in construction and not likely to .get out oforderf." Other and further objects ofthe invention f will appear as the description) proceeds;v

On the drawing: f

,Figure 1 is a side-elevation `of the' ovenI with Yparts in section and parts broken away; Figure 2 isa front elevation ofthe/'same with parts in section and parts broken away.

In ovens for drying or baking protective-., coatings on vehicle bodiesand parts-'thereofit has been heretofore the custom t empioy f ovens of large productive capacity;- In other words, drying or baking ovens of this nature have been employed almost exclusively by manufacturers and others doing the original painting, varnishingor enameling of vehicles in quantity.

The present invention contemplates theemployment of a small oven which is espe-` cially adapted to be employedin'garages or by others doing a recoating business. evident, however, that the device 1s notso It isY limited in its use, but may bef employed for'.

drying or baking" original coatingson ve`" hiclesor other articles and treating them on an extensive scale.

For the purpose ofy simplicity of` illustra-X.

tion and convenience of description, a device is shown more or less diagrammaticallyl that is adapted to accommodate a single vehicle body and parts thereof.

On the drawing, the reference numeral 1Q designates a. support such` as the door of a garage or other building. Thev floor is usu-` ally made of concrete and mounted thereon is the bottom wall .or iioor 11 ,of the oven. This ioor may be made from an suitable material, such asfrom the commercial magnesia block. The door 11` supports and 'has attached thereto the rear end wall 13 and the side walls 14. The top wall 15 is secured to,`.and supported by, the end iand sidewalls. The front end wall comprises two doors 16 `and 17 which are hinged to the .side walls 14. The freeed'ge of the door 16 is provided with, an extension 19 which isI` adapted to' overlapjthe reeedge of the door seal the joints between the meeting edges of the two doors. j

., :.Any suitable latching means maybe provided `for securing the doors fin closed posivsupports 18 secured to the front ends of the 417 when the doors are`in closed position'to Y tion.,`.As, sl1own" on. the drawin the free f edge of the door lis provided with the pivoted ,latch- 19y which has attached thereto 'the longitudinally fmovable latch bolts 20, 21 which are'adaptedfto engagekeepers 22 and 23 securedto the 'top .and `bottom walls,\re j spectively.

Wh'le I'ha've shown vthe oyen as being rectangular in form and of comparatively small dimenslons ,it is to be understood thatit may be of an '-suitable form and dimensions.

A* AQaQ ,Q51 `to vthe rear wall adjacent the ,door fo'the @ovenfis an ai'rl chamber 24,-,` 'of any" suitable form and material. As shown on the drawing, the air chamber is rectangular in form yand may be'maderom' sheet,

metal and extends the full length of one dimansion of the oven as across the rear end thereof. The chamber 24 is divided into an upper air inlet chamber 25 and a lower ventilating chamber 26.-r The partition 27 that divides the chambers 25 and 26 is inthe form of an inverted "Y with'a very broad.

base. By this arran ement suicient spaces are provided, for a arge air outlet in the middle portion of the rear wall of the lower chamber and a large air inlet in each end of the front wall of the upper chamber, without unduly increasing the dimensions of the air chamber. In order toinsure uniform ventilation across the entire width of the oven, the Ventilating chamber`26 is provided ,along the lower portion of its front wall with the inlet apertures or openings 28 extending the full length ofthe chamber.0 The chamber is also providedin its rear wall at( the center thereof `with a large out-let opening 29 the area of which, must be at least as large as the combined areas of the ventilating openings 28. A Ventilating pipe or conduit ,30 is'secured about the opening 29 vvcured to the valve pivot is adapted to be adjusted by means of a bolt or rod 33a which, in turn may be held in adjusted position by means of a set screw` 33h, in the usual manner. i

The valve 32 is provided with a small central opening in order to provideffor a certain amount of ventilation even though the valve be entirely closed.

For the purpose of rapidly clearing and cooling the oven or, under certain conditions, for regulating the heat thereof, an arcuate pipe or passage 35 extending through the top wall and communicating with the extension 31 may be provided. This pipe is adapted to be closed by the manually operated valve 36 during the normal operation of the oven. The valve 36 may be held in adjusted position by any suitable means such as the set screw 36 engaging the link 38 whichI operates the valve crank arm 39.

j In orderfto insure equal distribution of the air in passinginto the oven, the top wall of the air intake chamber 25 is provided with a series of outlet openings or apertures 37 extending the full length of the-chamber.'

The chamber 25 is also provided with large air inlet openings 40 and 41 in `its rear wall i yadjacent each end thereof.

The combined areas of the large openings 40 and 41 must be at least as large as the combined areas of the small openings37. Hollow members 42 and 43 secured about the openings 40 and 41 extend through the rear wall 13 and thus placeithe air chamber in communication with the external atmosphere.

A series of suitable heating devices are arranged at the rear of the oven above the air chamber-25 in such a position that the air ascending from the air chamber 25 will pass about the heating elements and become heated to the desired temperature. Any

`elements 45 for supporting fenders 46 or other articles during the drying or baking operation. f

In the operation of the device, if an automobile body is to be treated, the body is removed from the chassis, and its fenders, etc.

lare removed. The body 47 is mounted on a suitable supporting means such as the truck 48, and after the protective coating has been j applied to the body and its parts, the truck 48 is run into the oven 12. The fenders and other parts are properly suspended from the supports 45 after which the doors 1G and 17 are secured in closed position. The heat is now turned on and the air from the out-- side entering through the apertures 40 and 41 into the air chamber 25 passes upwardly through the outlet openings 37 and ascending about the heaters 44 is heated to the desired temperature, circulates about the coated articles for drying or baking the same. Parts of the air and obnoxious gases continually escape through the pipe 30 and its extension 31, and by adjusting the valve 32 the circulation of air within the oven 12 may be regulated and the noxious gases removed without materially interfering with the baking operation.

By means of this device it is possible to reiinish automobile bodies and parts thereof without removing the upholstery, since by means of this arrangement it is not necessary to heat the ovenabove the point where it `would injure the upholstery, say 25() to f device may be employed to dry paint, varnish and similar coatings employing lower temperatures than is required for enamel'ing work.

It will thus be seen that I have provided a drying or baking oven that is cheap to manufacture and eiiicient in. operation' and one that may be'installed in almost any garage for the purpose of recoating automobiles and parts thereof.

' I claim:

1. In a heat treating device of the class described, a chambery having an entrance leading thereinto, and a closure for said entrance, heating means located within said chamber, an air intake device located within said chamber in direct communication with the exterior atmosphere through an opening provided in the wall of said chamber conduit communicating with said opening` and lextending upwardly therefrom.

2. In a device of the class described, a chamber provided with an entrance opening leading thereinto, and a .closure for said opening; anair intake device located within the lower portion of said chamber and adjacent the wall thereof opposite said opening, said air intake device being in communication with the external atmosphere, and having a plurality of air inlets discharging directly into saidchamber,I and said distributing device yhavingfa plurality of Ventilating' openings leading directly into the interior of said chamber and through whic-h 4openings gases mayflow from the interior of said`chamber into said air intake device and from said device through an opening in the wall aforesaid, a conduit through which gases escaping from the interior of said chamber as aforesaid may flow, a valve forcontrolling the flow through said conduit, and heating means located adjacent the wall of said chamber opposite the opening leading thereinto, and above said air intake device.

3. In a device of the class described, an air chamber for a heat treating device, said chamber consisting of an upper air inlet chamber and a lower Ventilating chamber, said air inlet'y chamber having open-ings therein for permitting a uniform flow of "substantially the full length, thereof, the

rear wall of said upper compartment provided with a large opening at each end thereof, the front wall of said lower toml partment provided with a series lof lapertures extending substantially the full length thereof and the rear wall of said lower compartment provided at its widest .portion with a large opening, substantially as shown and described.

5. In a device of the class described, a

chamber, means for heating the same, means `:adjacent the lower portion of one side wall of ,said chamber for admitting4 air to said chamber, means below the -a1r admission means and Vadjacent a still lower portion of said side wall of saidchamber for permitting the escape` of air and gases from said chamber, including a conduit for conducting said air and gases away from said chamber, a passage connecting -the upper portion of said chamber and conduit, and a valve in said passage.

v 6. In a heat treating device of-the class described, a chamber having an entrance. opening at one end thereof, and a closure for said opening; heating means located.

within said chamber and adjacent the wall thereof opposite said opening; and an air intake device leading from the external atmosphere through the lower portion of the wall aforesaid and discharging directly into said chamber; said chamber being provided adjacent the lower end thereof with a ventilating outlet opening.

7. In a device of the class described, a chamber having doors at one side thereof. and heating and Ventilating means adjacent vto another side thereof comprising air inlet means vand air outlet means arranged low down along sald last named side, the former above the j latter, and a second airoutlet means from the top of the chamber and an air heater substantially above 'the air inlet means.

, 8. In a device of the class described, a chamber having doorsat one side thereof, and heating and Ventilating means adjacent to another side thereof comprising air inlet means and air outlet means arranged low down along said last named side, the former above the latter, and a second air outlet means from the top of the chamber and an air heater substantially above the air inlet means, bothsaid air outlet means being connected together outside the chamber".

In testimony whereofI affix my signature.

JOHN A. MILLER.

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