US3435818A - Portable road mark paint drying machines - Google Patents

Description

April 1, 1969 J. c. DRAKE 3,435,318

\ PORTABLE ROAD MARK PAINT DRYING MACHINES Filed Aug. 9, 1967 Sheet 7 of 3 INVENTOR. James C. Drake ATTORNEY Y April 1, 1969 J. c. DRAKE PORTABLE ROAD MARK PAINT DRYING MACHINES Filed Aug. 9. 1967 Sheet JIIIIIIIIJ'IJJJ INVENTOR. James C. Drake ATTORNEY April 1, 1969 J. c. DRAKE PORTABLE ROAD MARK PAINT DRYING MACHINES Filed Aug. 9, 1967 Sheet 3 ms Fig. 7

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INVENTOR. "James G. Drake ATTORNEY United States Patent 3,435,818 PORTABLE ROAD MARK PAINT DRYING MACHINES James C. Drake, Grand Junction, Colo., assignor of Ewenty percent to Wilbur A. E. Mitchell, Greeley,

Filed Aug. 9, 1967, Ser. No. 663,916 Int. Cl. F23c 5/00 US. Cl. 126-271.2 6 Claims ABSTRACT OF THE DISCLOSURE A highway paint mark drying machine including a hot air blast furnace. An adjustable pipe extension is connected to the furnace. The outlet end of the pipe extension is provided with a horizontally rotatable register member. The register member further includes pivotally adjustable vane members.

This invention relates to portable paint drying machines for drying freshly painted highway marking strips or lines.

Modern highways have painted center lines, as well as so-called double no-passing center lines, outer edge marker lines and other painted markings, which are usually painted by mobile painting machines directly onto the highway surface. Said painting machines are capable of applying a painted strip along the highway while moving at a speed of approximately three to five miles per hour. Depending upon the time of year and weather conditions, it normally takes from twenty minutes to forty-five minutes for such freshly painted highway marking to set or dry sufficiently to permit moving traffic to run thereon without smearing or ruining same. It has, therefore, heretofore been necessary to run at least a three man crewone operating the driven painting machine, another driving the truck pulling that machine, and a third man operating another truck carrying a load of suitable fresh paint warning signs, and to place those signs along the newly applied highway marking, and proceeding rearwardly from time to time to pick up those signs where the paint has set sufficiently to allow moving trafiic thereon. Such warning signs are usually applied about every 100 yards or so along the newly applied highway markings. The matter of the placing and removing of those warning signs results in many man hours of labor. To overcome that man hour inefficiency and expense, in the placing and removing of those temporary warning signs, I have developed my novel, portable, highway-paint-strip drying machine.

With the use of my novel, portable, paint-drying machine, which follows immediately behind the mobile painting machine and over the freshly painted highway mar-king strip, the freshly painted strip is thereby dried or set sufiiciently that it can be driven over by moving trailic practically immediately, thus making it unnecessary to place and remove the many temporary wet paint warning signs, and thereby accomplishing a great saving in man hours of labor.

I have perfected a novel, portable, paint-drying machine capable of moving as rapidly along the freshly applied highway marking as the mobile painting machine, which applies said markings, at a speed of approximately three to five miles per hour. To accomplish that drying of the newly painted highway marking strip I have developed a novel drying machine delivering a strong blast of high degree exhaust air from a portable, propane burner, furnace "ice unit, directing that hot air blast onto the freshly painted strip by a large blower pipe exhaust port end and passing the blast directly onto and over the freshly painted strip, as the unit is moved forwardly along and over that painted strip.

It is, therefore, a principal object of my invention, in such a machine to provide a portable, high-pressure, propane furnace, adapted to be transported on a truck, and having a power driven fan adapted to suck the heated blast of exhaust air directly from that furnace and into an adjustable exhaust pipe, adapted to adjustably direct that hot air blast onto the freshly painted strip as the truck moves forwardly over and along that painted strip.

Another principal object of my invention is the provision of a novel, adjustable, hot-air, exhaust pipe, in combination with such a portable drying machine furnace unit, and having a novel, adjustable, horizontal, outlet register at the oven-like, housing, discharge end of the exhaust pipe, adapted for adjustably, rotatably, and in a horizontal arc directing that blast of heated air onto such freshly painted highway mar-king or strip, while that discharge end of the exhaust pipe passes close to and over the freshly painted marking.

A further object of my invention is the provision of a novel, horizontally rotatable, movable, diametrically variable, adjustable grill or set of register vanes, at the discharge end of my novel, hot-air blast, exhaust pipe, so as to be able to adjustably direct that blast of hot air onto the freshly painted road surface marking or strip, aaginst any different wind condition, from time to time.

Other and further objects will be apparent to those skilled in the art.

FIGURE 1 is an elevational view of my novel paint strip drying machine, mounted on the flatbed of a suitable truck.

FIGURE 2 is an enlarged end view of the front end of the furnace, looking in the direction of the arrow 2 of FIGURE 4.

FIGURE 3 is an end view of the rear of the furnace, looking in the direction of the arrow 3 of FIGURE 4.

FIGURE 4 is an enlarged, partial, vertical, longitudinal, cross-sectional view of the furnace portion of my portable highway paint drying machine.

FIGURE 5 is an enlarged rear view of the novel discharge end of my hot air exhaust pipe of my paint drying machine.

FIGURE 6 is a reduced diagrammatical view, illustrative of one means used to raise and lower my hot air exhaust pipe and also to vary the horizontal positioning of the discharge end thereof.

FIGURE 7 is an enlarged, vertical, cross-sectional view taken on the line 7-7 of FIGURE 5, being of the discharge end of my hot air blast pipe 3-6.

FIGURE 8 is a horizontal, sectional view, looking downwardly in the direction of the arrow 5 and on the line 8-8 of FIGURE 5, showing my novel adjustable register 57 of that discharge end of the pipe 36.

FIGURE 9 is an elevational view of my novel, rotatably adjustable and adjustable to the vertical, grill member or vanes 57.

FIGURE 10 is a reduced side view of the discharge end of my hot air exhaust pipe 36.

In the drawings, similar characters of reference indicate corresponding parts in the several views.

On a suitable motor tmck, such as a 2 /2 ton chassis,

10, having a flat bed, 11 I secure an insulated, fire-clay lined high pressure propane hot air blast furnace 12, adapted to burn high pressure propane fuel supplied from a suitable storage tank, 13, carried on the truck. I provide the heater furnace, 12, as a large elongated fire box enclosure with its outer surface insulated, with a conventional propane fuel burner head, 14, suitably connected to burn high pressure propane fuel from the supply tank, 13.

It will be understood that the burner 14 has an adjustable, conventional, air intake opening, 15. The front end of the furnace tank 12 is otherwise closed at that end, except for a secondary air intake opening, 19, adapted to supply the high pressure fuel primary mixture with a large quantity of secondary air for a suitable, ultimate, combustion mixture, commensurate with the draft of the exhaust suction fan pulling the heated exhaust air out of the other end of the furnace directly from the fire chamber. I provide a secondary air opening as a segmented opening, 19, as shown in FIGURE 2, and a suitable, pivoted, adjustable, segment-shutter, 16, as shown, and as will be understood. The outer, rounded, peripheral edge of the shutter, 16, is functionally adapted for manual sliding thereof within a peripheral groove provided for that purpose on that end of the furnace by a pivoting of 16 on its pivot 17. It will be seen that shutter 16 may be moved or swung on 17, to provide a suitably sized secondary air intake opening between its edge 16a and the exposed segmental edge of the secondary intake opening 19. An outlet, 20, for heated air to leave the furnace is provided at the furnaces far end. To prevent the fuel mixture combustion flame from being drawn directly into the exhaust outlet suction fan at that opening, 20, I provide a plurality of suitable fire resistant baffles, 21, 22 and 23, spacedly positioned and held within my furnace, as shown and as will be understood.

The exhaust draft fan, 30, is a conventional, squirrelcage type fan suitably mounted in a fan housing 31, operated by a motor 32 and pulley 33. The fan 30 is adapted to suck hot exhaust air into its center from the side thereof, at furnace exhaust port 20, and to force such hot air out its periphery into pipe 36, in a conventional manner. The fan housing 31 is a complete enclosure, except for the intake opening, 34, on its one side in pipe connection with outlet 20 of the furnace, and except for outlet opening 35 to which a hot air discharge pipe 36 is secured. A suitable pipe connects the said openings 20 and 34. It will be seen that the blast of hot exhaust air created by the burning of high pressure propane fuel, accentuated by the suction of the fan 30, will be drawn directly out the pipe 36.

I construct the hot air exhaust pipe, 36, of suitable, conventional, telescoping sections 37, 38, 39 and 40, adapted to be conventionally adjustable vertically and horizontally. A conventional means is used for effecting a manual raising or lowering adjustment of the outer end of pipe 36, and a positioning of its discharge end 50 in a horizontal plane, to effect various adjustments of the position of that discharge end 50 of the pipe 36, as may be needed and as will be understood from the diagrammatical view of FIGURE 6.

I provide the discharge end, 50, of the exhaust pipe 36 with a flared, inverted, funnel-like, oven-housing extension 51 thereof, as illustrated in FIGURES 1, 5, 7 and 10. A pair of diametrically positioned wheels, 52, on stub shafts, 53, are suitably secured to each side of the housing, 51, to hold and guide the lower, open end of that housing 51 in close positioning to the road surface, 54, with the weight of the pipe riding on those wheels. It will be understood that those wheels can have their stub shafts, 53, adjustable vertically on the extension of the drum 51, in a conventional manner, although such adjustability of the wheels is not shown, so as to be able to vary the distance between the lower edge 56 of the ovenhousing, 51, and the freshly painted highway strip 55 on the highway surface, as may be desired.

During the use of my paint drying machine while moving along the highway, quite often wind is a terrific problem. To prevent a prevailing wind from deflecting the blast of hot air from the discharge end 56 of my hot air exhaust pipe 36 away from the freshly painted highway strip as my machine passes thereover, I provide the novel, flared, oven-like housing extension 51, at the end of my exhaust pipe 36. Within the novel housing 31 I provide a novel combination of a multiply adjustable, horizontally rotatable register, having vane blades which are in turn also adjustable, so as to be able to vary and control the direction of the hot air blast leaving that exhaust pipe. I provide for normal angular variation of the vane blades, 74, of the grill or register, 57, within an arc of about 140 degrees, or being about 70 degrees on each side from the vertical thereof, and also at the same time for horizontal rotation of the entire grill or register 57 in a horizontal arc of about degrees, or about 50 degrees on each side of the direction of travel of my paint drying machine; comprising my novel means for controlling the direction of the hot air blast leaving that end 56 of my exhaust pipe 36. I provide for reversibility of those blades, 74, from the vertical, at the same time as providing for the rotation of the grill 57 within the housing 51 on shoulder 58, which amounts substantially to total adjustability of the direction of the hot air blast leaving the lower end, 56, of my exhaust pipe 36, in substantially a 270 degree horizontal arc, to meet any given wind obstacle or condition, as will be further explained.

I provide a novel combination, with my housing 51, of a round, horizontally and manually rotatable, register member 57, being a means for controlling the direction of the hot air blast .from the oven-housing. That register is in the form of a variably positioned ring, 57, resting on and adapted to be carried loosely by, and for manual horizontal rotation within, the shoulder 58, formed for that purpose on the inner periphery of the lower inner portion of the round oven-housing 51, as shown in FIG- URES 7 and 8. The register-ring 57 is designed to be frictionally rotated horizontally or positioned radially on the shoulder 58, as will be explained.

In and to my rotatable disc register, 57, I rotatably mount a plurality of aligned, flat, directional deflector vanes or blades, 74, by suitabl horizontally positioning and pivoting each vane at opposite sides thereof and to the disc register. I mount each vane by a loose pivot projection thereof, and by suitably journalling same at 75, into a suitable loose bearing connection, and carried internally of my ring 57 as illustrated. To be able to control the pivotal adjustment of all those vanes 74 in. unison I provide horizontally slidable control bar means, 72, of the design illustrated, loosely carried in a vertical slot, 70, provided in the upper edge of the ring 57, as shown. A portion of that flat collar ring 57, on each side of the slot 70, is extended or made wider, with that extra width indicated as collar extension 59, for reasons to be explained. The end of the slidable control bar 72 opposite the slot 70 is slidably held between spacer plates 71 secured to the inside of the ring 57, as shown, and with the control bar 72 resting loosely on top of the aligned vanes 74. It will be seen that the bar 72 is adapted to simultaneously control the relative slant, or angle from the vertical, of each pivotally movable vane 74, and to accomplish that I provide a plurality of suitably spaced notches, 76, on the lower edge of the bar 72, with each notch positioned and adapted to fit loosely over and receive therein an ad jacent upper edge of one of the spaced vanes, 74.

A plurality of spaced notches 73 are also provided on the lower edge of the control bar 72, adjacent its end extending through slot 70, of a size and position adapted for any one thereof to encompass and rest on the lower edge of the slot 70. The weight of the bar 72 causes engagement of notch 73 with slot 70s lower edge, and comprises gravity latch means for holding the control bar 72 in any one of a number of horizontal positions extending between the plates 71 and the slot 70, as 72 rests on top of the vanes 74, for in turn holding said vanes 74 in any desired pivotal angle of each to the vertical. The notches 76 in the lower edge of the bar 72 are equidistant apart. An inner stop member, 78, projecting from the side of the bar 72, positioned a relatively short distance from the inner periphery of the ring 57, as shown in FIGURE 9, is provided to prevent a withdrawal of the bar 72 through slot 70 to the left as illustrated, and to prevent disengagement of the upper edges of the vanes 74 from those notches 76 of the bar 72. Control bar 72 is of a suflicient length to extend a short distance beyond the outer periphery of the ring 57 when it is moved as far as possible to the right, as viewed in full lines of FIGURE 7. The outer end of bar 72 is flared at 72a to form a right angular upstanding handle and outer stop extension. Bar 72 is of such a length that when its handle 72a is moved toward or into close contact with the outer periphery of the ring 57, and its outer notch 73 then latch engages the lower edge of the slot 70, the other end of the control bar 72 is then in close proximity to the end plate 57a extending across guide plates 71, and the vanes 74 are held parallel by the control bar 72 in their extreme pivotal position to the right, as shown in full lines of FIGURE 7. It will be understood that further positioning of bar 72 to the right, and resultant angular positioning thereby of the vanes 74 with their tops to the right, farther than as shown, could be designed if necessary.

Conversely, when the control bar 72 is pulled into the position shown in the dotted lines of FIGURE 7, then the sliding movement of the control bar in that direction is limited by the stop 78 thereof abutting the inside of the ring 57, and the inner latch notch, 73, then engages the lower edge of the slot 70, and the vanes 74 are then in turn held pivotally in the other extreme pivotal position by the control bar 72, as shown in the dotted lines of that view. It will be seen that any other pivotal adjustments or positions of the vanes by that control bar 72 may be made by a sliding movement of that bar 72 and positioning of any desired notch 73 thereof on the lower edge of slot 70, as desired.

My register ring, 57, is horizontally rotatable substantially 120 degrees of a 360 degree circle, as indicated by the arrows E, and the vanes 74 of that register ring 57 are also adjustable in unison by control bar 72 into any desired slant or angular position from the vertical anywhere within a maximum of about 70 degrees on each side from the vertical, at the same time.

It will be seen, therefore, that my just described novel adjustability of the register 57 and its vanes 74 amount to means for adjusting the hot air blast directional control by that register and its vanes throughout substantially a 240 degree horizontal arc, as indicated by the dotted line are E of FIGURE 8, and since each angular position of the vanes are adjustably positionable on each side of and from the vertical, at the same time as the register is so rotatable. By being able to thereby control the direction of the hot air blast leaving the exhaust pipe through the oven-like housing 51, by my said means for adjusting the register and its vanes, that blast of hot air can be directed into the direction of the prevailing wind, and, as a result, my machine is capable of being used along the highway at maximum efi'iciency, regardless of the direction of the prevailing wind and in inclement weather.

For example, with reference to FIGURE 7, when there is a rearward or tail wind, indicated as A of FIGURE 7, following the direction of travel of the machine as the paint drying machine is being used along the highway, then the control bar 72 is placed into the position illustrated in the full lines thereof (of FIGURE 7) so that the hot air blast leaving the under side of 51 will be directed by those vanes 74 against or into that wind, as illustrated by the full line arrows, A of FIGURE 7, in order to cause the hot air to be blown against that wind for most efficient use of that hot air blast in drying the freshly applied painted strip, thus preventing the greater part of the hot air blast from being carried away by the wind. Conversely, if the wind is coming from the opposite direction, indicated as B of FIGURE 7, an opposite adjustment of the vanes 74 by the bar 72 will be made as shown in the dotted lines of FIGURE 7, to result in a direction forcing thereby of the hot air blast against that wind to effect the maximum drying efliciency by my machine.

As to the operation of the control bar 72 by the worker operating the paint drying machine, the operator manually lifts the control bar 72 by its handle end 72a, sulficiently to disengage the notch 73 from engagement with the lower edge of slot 70. Then the bar 72 is pushed or pulled, as may be desired, to thereby cause the vanes 74 to be slanted into the desired directional slant positioning from vertical, on either side of the vertical, as the case may be and as will be understood from the above explanation. Then the handle 72a is lowered until a desired new notch 73 engages the lower edge of slot 70, for thereby holding the control bar 72 in the desired new position. At any time, independent of that adjustment by the control bar 72 of the slant of the vanes 74, the entire register ring 57 may be manually rotated by pressure sideways on the handle 72a thereof, thus moving the ring 57, on the shoulder 58 of the oven housing 51, into any position desired within the inner periphery of the shoulder 58. Ring 57 is of sufficient weight and size to be frictionally held in any horizontal position within the inner periphery of the housing 51 on the shoulder 58 thereof. The control bar 72 and its handle end 72a fit frictionally, yet slidably, within that opening 79, as shown in FIG- URE 5. The length of that slot 79 controls the extent of the adjustment or horizontal positioning of the ring 57, as explained, and which I preferably make about degrees. Collar extension, indicated as 59, of the ring 57, is obviously designed to prevent the hot air of the pipe 36 from escaping out the slot 79, during use and horizontal positioning of bar 72 by the handle 72a thereby sideways within the slot 79, as will be understood.

Having thus fully shown, explained and disclosed the preferred embodiment of my invention, it is to be understood that many changes and modifications therein may be made within the scope, spirit and teaching thereof, and therefore, I wish to be bound only by and within the scope of the hereunto appended claims.

What I claim and desire to secure by Letters Patent is:

1. A portable paint drying machine for drying freshly painted highway markings at it is moved thereover, comprising a hot air heater furnace means, mounting means on the furnace means for securing same to and as a part of a motor vehicle, a fuel storage supply means as a part of the vehicle, a fuel burner means at one end of the furnace, fuel supply connection means between the fuel storage means and the burner means, a combustion exhaust port at the other end of the furnace, a flame bafile plate midway of the furnace interior, a fan housing enclosure in extension of the exhaust port, a flexible hot air discharge pipe extending from said fan housing enclosure, a power blower fan means in the fan housing being 'adapted to suck the combustion exhaust and hot air directly from the furnace exhaust port and force it into the hot air discharge pipe, power means on the vehicle for operating said blower fan, an inverted funnel-like oven extension means at the discharge extremity of the hot air discharge pipe, a frictionally mounted and rotatably adjustable outlet register member carried by the discharge extremity of the pipe, means on the vehicle for carrying said hot air discharge pipe thereby and being adapted for a manual adjusting of the position of its oven discharge extremity with relation to the freshly painted marking on the highway surface, manually pivotally frictionally adjustable air vane means in and carried by the rotatable outlet register member of the oven extension of the hot air discharge pipe for varying the direction of discharge of the furnace exhaust hot air from that pipe, and means on the register for so mounting the vanes, and means on the oven extension for so rotatably mounting the register.

2. A paint drying machine for drying freshly painted highway markings as it is moved thereover, comprising a hot air heater furnace means, mounting means on the furance means for securing same to and as a part of a motor vehicle, a fuel storage supply means as a part of the vehicle, a fuel burner means at one end of the furnace, fuel supply connection means between the fuel storage means and the burner means, a combustion exhaust port at the other end of the furnace, a flame baffle plate midway of the furnace interior, a fan housing enclosure intergral with the exhaust port, a flexible hot air discharge pipe extending from said fan housing enclosure, a power blower fan means in the fan housing being adapted to suck the heated burner combustion exhaust directly from the furnace exhaust port and force it into the hot air discharge pipe, power means on the vehicle for operating said blower fan, an inverted funnel-like oven extension means at the discharge extremity of the hot air discharge pipe, means on the vehicle for carrying said hot air discharge pipe thereby and being adapted for a manual adjusting of the position of its oven discharge extremity with relation to the freshly painted marking on the highway surface, a plurality of manually adjustable air vane means in and frictionally carried by the oven extension of the hot air discharge pipe for varying the direction of discharge of the furnace exhaust hot air from that pipe, and means for so frictionally mounting said vanes, said air vane means comprising a horizontally rotatable disc register means frictionally carried within said oven extension end of the hot air discharge pipe, means carried by said discharge pipe for so frictionally mounting the register means therein, said disc register means having the plurality of pivotally mounted air vane blade means carried thereby and adapted for manual adjustment of each substantially into any position within 70 degrees from each side of the vertical, means for so pivotally mounting and carrying said vane means within and by said disc register means, and manually operable latch and control means carried by and Within the oven extension for effecting such positional separate adjustments of the register on the one hand and also of its vane blade means on the other hand.

3. In a motor vehicle having a body floor, a highway paint drying machine comprising, a blast furnace means mounted on said vehicle floor, means on the furnace for so mounting the furnace to the vehicle floor, a fuel storage supply means as a part of the vehicle, a fuel burner means at one end of the furnace, fuel supply connection means between the fuel storage means and the burner means, a combustion exhaust port at the other end of the furnace means, a baffle plate midway of the furnace interior, a fan housing enclosure in extension of the furnace means exhaust port, a flexible hot air discharge pipe extending from said fan housing enclosure, a power blower fan means in the fan housing being adapted to suck the furnace combustion exhaust air directly from the furnace means exhaust port and force it into the hot air discharge pipe, power means on the vehicle for operating said blower fan, an inverted, funnel-like, oven extension means at the discharge extremity of the hot air discharge pipe, means on the vehicle for carrying said hot air discharge pipe thereby and being adapted for a manual adjusting of the position of its oven dischange extremity with relation to the surface of the ground, manually adjustable pivotal air vane means in and frictionally carried by the oven extension of the hot air discharge pipe for varying the direction of discharge of the furnace exhaust hot air from that pipe, and means for so frictionally mounting said vane means, and including an adjustably rotatable horizontal register member means carried by said oven extension of the hot air discharge pipe.

4. In combination, a motor vehicle having a body floor, a highway strip paint drying machine comprising a blast furnace mounted on said vehicle floor, means on the furnace for so mounting the furnace to the vehicle floor, a fuel storage supply tank carried by the vehicle, a fuel burner means at one end of the furnace, fuel supply connection means between the fuel storage tank and the burner means, a combustion exhaust port at the other end of the furnace, a flame baffle plate midway of the furnace interior, a fan housing enclosure as a part of the furnace exhaust port, a flexible hot air discharge pipe extending from said fan housing enclosure, a power blower fan means in the fan housing being adapted to suck the burner exhaust air directly from the furnace and force it into the hot air discharge pipe, power means on the vehicle for operating said blower fan, an inverted funnel-like oven extension means at the discharge extremity of the hot air discharge pipe, means on the vehicle for carrying said hot air discharge pipe thereby and being adapted for a manual adjusting of the position of its oven discharge extremity with relation to the surface of the ground and with relation to the painted strip being dried by the machine, a plurality of manually, simultaneously adjustable, pivotally mounted, air vane blade means in and frictionally carried by the oven extension of the hot air discharge pipe for varying the direction of discharge of the furnace exhaust hot air from that oven end of the discharge pipe, and means comprising substantially a horizontal are rotatable disc register means frictionally held and carried within said oven extension end of the hot air pipe, means on the discharge pipe for so frictionally mounting the register means in the oven extension means, said disc register means carrying said plurality of pivotally mounted air vane blade means, each blade means being manually adjustable substantially in any position to 70 degrees from each side of the vertical, said blades having a manually operable latch-control-means carried by and within the oven extension for so adjusting the position of the vane blades into any angular position thereof with relation to the vertical.

5. The combination with a highway paint mark drying machine having a hot air blast furnace, an adjustable pipe extension for directing furnace exhaust hot air therefrom onto the freshly painted mark and a power fan for drawing the exhaust hot air into the pipe extension as the machine is drawn along said fresh paint, of a horizontally rotatable frictionally mounted round hot air discharge register member means in the discharge end of the pipe, adapted for controlling the direction of the hot exhaust air blast therefrom onto the freshly painted mark, said register having pivotally adjustable vane means carried thereby, manual means for effecting rotation of said register member means, and separate manual means for effecting pivotal adjustment of said vane means, said register means being adapted for rotation in any are position thereof within substantially fifty degrees of either side of a given radius thereof.

6. The combination with a moveable paint drying road machine having a hot air heater unit, an adjustable hot air discharge pipe extending therefrom and having a discharge end horizontally wheeled-supported a spaced distance on and from the surface of the road on which the machine is moved and having a horizontal open end thereof, and a blower fan in said pipe for forcing the hot air therefrom, of a multiply adjustable horizontally rotatable and positioned hot air register frictionally carried by and in the discharge pipe at its open end and adapted for controlling the direction of the hot air forced from the register at that end, means for so adjustably horizontally rotatably carrying the register at said discharge pipe open end for horizontally rotatably adjusting the register to any position substantially within degrees on either side of the direction of movement of the machine, a

both and adapted for so horizontally rotatably adjusting 5 the register and also being adapted for effecting a pivotal adjustment of the angle of a vane air deflector blade means and including an operable latch control means and being operably loose-bearing pivotally connected with position within 70 degrees from each side of the vertical of said blade means upon operable bar means movement.

References Cited UNITED STATES PATENTS 805,337 11/1905 Blake et a1. 3,034,498 5/1962 Gill um 126-2712 3,136,488 6/1964 Petlak et al.

the deflector blade means to effect a pivoting into any 10 CHARLES J. MYHRE, Primary Examiner.

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