Electric heating – Heating devices – Tool or instrument
Reexamination Certificate
2000-02-22
2001-07-03
Jeffery, John A. (Department: 3742)
Electric heating
Heating devices
Tool or instrument
C401S001000, C222S146500
Reexamination Certificate
active
06255625
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to electrically heated wax guns, and, more particularly, to an improved air-operated wax gun for making jewelry and the like.
2. Description of Related Art
Wax modeling for jewelry and sculpture is known. In particular, professionals who design jewelry have been using what has been referred to as a “MATT GUN” to transform sticks of hard wax into wire of different shapes and thickness. An important advantages of the Matt Gun lies in the fact that the extruded wire obtainable from a Matt Gun can vary in thickness so as to produce jewelry and miniature sculptures in three-dimensional character with a minimum of weight.
The Matt Gun has the ability to control pressure on the extruding wax, by means of a person's thumb pressing against a plunger, allowing a jewelry maker to produce constantly changing characteristics for their designs. Furthermore, because it is possible to vary the temperature of the Matt Gun, the extruded wax is more flexible and can be manipulated to a far greater extent than with conventional techniques or other known devices. Also, another advantage of the Matt Gun is that it uses a hard wax, therefore, eliminating the problems of damaged models made with any device that uses soft wax, or the like.
However, it has been found that the Matt Gun is not easy to use, and can cause fatigue in that it requires the user to press a plunger at the rear of the gun with their thumb, while attempting to hold the gun, and controlling the temperature of the gun, to extrude the wax out of the tip of the gun.
Other molten wax applicators and devices are known for use in the dental industry, or in the manufacture of various mechanical appliances. These devices tend to use softer waxes than the Matt Gun, and therefore, are not as useful in forming jewelry and small sculpture design. Examples of such known prior art devices are set forth in the following U.S. utility and design patents:
1,905,987
2,653,603
3,554,408
3,690,776
3,800,122
3,831,815
3,902,043
5,061,178
4,301,357
4,691,703
4,813,870
4,819,842
4,964,367
5,346,394
5,524,809
5,816,450
and Des. 382,456
Although the known prior art produce improved results, they still do not overcome the fatigue and other problems of handling when extruding hot wax from a gun encountered with the Matt Gun described above. Therefore, there exists a need in the art for an easily operated and less fatiguing device for extruding hard wax and forming jewelry and small sculpture designs.
SUMMARY OF THE INVENTION
It is, therefore, a general object of the present invention to provide an improved and simplified wax gun for designing jewelry. It is a particular object of the present invention to provide an improved air-operated wax gun for making jewelry and small sculpture designs. It is another particular object of the present invention to provide an improved air-operated wax gun having a piston operator held within an elongated tube, with a heating elements surrounding the elongated tube, and which is easily held and manipulated in a single hand of a user. And, it is still another particular object of the present invention to provide an improved air-operated wax gun which has a separate electrical heating element held between an insulating holder and an elongated cylindrical element having hard wax therein for extrusion out of changeable tips to form jewelry and small sculpture designs.
These and other objects and advantages of the present invention are achieved by providing a molten wax extruding device for building patterns and forms for jewelry and the like. The device has an elongated handle that is held and manipulated between the thumb and fingers of one hand, and also includes an elongated central tube with an electrical heating element held between the elongated central tube and the elongated handle. A dispensing tip is removably secured to a first end of the central tube, and an air-operated piston is held at a second end of the central tube with wax plugs inserted into the central tube, heated and extruded from the dispensing tip by movement of the piston.
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Creations des Mers du Sud Exploitation Sarl
Jeffery John A.
O'Neill James G.
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