Heating – Heat generator with an associated work support or heat... – Movably mounted heat emitter traverses work during heating
Patent
1984-05-07
1985-10-15
Camby, John J.
Heating
Heat generator with an associated work support or heat...
Movably mounted heat emitter traverses work during heating
1262711, 1262712A, 432222, F24J 300, F24J 302, F23C 500
Patent
active
045471525
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a device for heating the bitumen layer of roofing material in order to make said layer soft and sticky enough to adhere to the surface which is being covered without burning said layer.
STATE OF THE ART
When applying roofing material burner elements are directed at the bitumen layer of the material in order to make this layer soft and sticky so that the material will adhere to the surface which is being covered. Heating is applied continuously as the roofing material is unrolled unto the surface with its bitumen layer towards the surface. Currently available burners generally have a few round nozzles. They do not function satisfactorily because the heating of the bitumen layer is uneven and the roofing material consequently may become scorched in places. As a result the overall result of applying roofing material is not satisfactory.
Larger devices have been developed with burner elements on a frame. Such devices are described in SE-181969 and in DE-OS No. 28 12 347. These devices are however constructed in a such a manner that the flames are directed towards or at least can come into contact with the bitumen layer which may catch fire. This is undesirable both because the adhesive properties of the bitumen will be impaired and because the heating is uneven as the coating is burned unevenly. These known devices are further part of larger apparatuses precluding the possibility of moving the heating device sideways or backwards and forwards in relation to the roll of roofing material. This movement is desirable in order to compensate for winds and in order to achieve the correct temperature in the bitumen layer.
DESCRIPTION OF THE INVENTION
The present invention aims at solving the above problems. A particular purpose is to present a device of low weight which is easy to maneuver in relation to the roll of roofing material and which heats the bitumen layer thereof with a jet of hot air rather than with open flames.
These and other purposes may be achieved by a device comprising the features mentioned in the patent claims to follow. Other characteristics and advantages of the invention will become apparent in the following description of a preferred embodiment.
BIREF DESCRIPTION OF DRAWINGS
The following description of a preferred embodiment will refer to the attached figures, of which
FIG. 1 is a drawing in perspective illustrating the use of the device according to the invention,
FIG. 2 is a drawing in perspective of a heating assembly, viewed from the front, which is a part of the device according to the invention, and
FIG. 3 is a sectioned view of the heater according to FIG. 2 as sectioned along the line III--III.
DESCRIPTION OF A PREFERRED EMBODIMENT
In FIG. 1 the heater is designated 1 and the roll of roofing material is designated 2. The latter is only indicated by ghost lines. A rod 3 goes through the center of the roll 2 and is journalled in the ends of a frame handle 4. The frame handle 4 may be hooked unto and connected loosely to the heater 1 by being placed in the hook 5 which is mounted on the pipe 6 which supplies the heater with gas. The gas hose is designated 7 and an on-off valve 8.
The heater consists of two main parts, the casing 9 and the nozzle row assembly 10. The casing 9 consists of an elongated boxlike frame with a top sheet 11, a bottom sheet 12 and gable plates 13 and 14. The top and bottom sheets are plane and parallel to each other and their front and rear edges 15 are folded up for greater rigidity. The length of the top and bottom sheets 11 and 12, in other words the distance between the gable plates 13 and 14, is considerably greater than the width of the casing 9, in other words the distance between the front 17 and the rear 16 of the casing. The height of the casing is also considerably less than its width. A number of distance and reinforcing steel plates 18 are distributed between the gable plates 13 and 14. The reinforcing plates 18 are placed in front of the nozzle row assembly 10 and are parallel to the gable
REFERENCES:
patent: 2084625 (1937-06-01), Stebbins et al.
patent: 2532567 (1950-12-01), Mott et al.
patent: 2836409 (1958-05-01), Harrison
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