PATENT FUEL

Abstract: Patent fuel consisting of a block of less combustible material, wholly or partly enclosed in a packing of more combustible material, which packing may have been impregnated using a particularly combustible material. This invention is characteristic in that the packing (2) is constituted by a rigid, self-supporting shell construction preferably of cardboard. Preferably the block (1) and the packing (2) may be designed so in relation to each other that there will be one or more cavities between these. The packing (2) section may have the shape of a polygon, for instance an isosceles triangle, so that the block (1) will not fill out the packing (2) along the longitudinal edges (3, 4, 5) of the polygon.

Description: PATENT FUEL This invention concerns a patent fuel consisting of a block of less combustible material , wholly or partly enclosed in a pack ng of more combustible material , which packing may have been impregnated using a particularly combustible ma¬ terial . It is characteristic of the known patent fuels that they ill either be v e r difficult to light but on the other hand burn for a long time, or they may be easy to light but will then in turn burn fast. Attempts have been made to overcome these drawbacks in several ways. The latter type you may thus enlarge to add to the burning type but in that case you will get an unhandy patent fuel size. The roo e sr f EA OMPI IPO compact type difficult to light has been subject to at¬ tempts of providing for it lighting strips of more combu¬ stible material , or a combustible powder has been placed on the patent fuel surfaces or in grooves in the patent fuel . This, however, entails rising cost of pro¬ duction, especially if you place so many of these devices on the patent fuel sides that it will make no difference in which position it is placed when lighting. o Patent fuels of the compact type hard to light are known for instance from the description pertaining to US patent no. 4o46518 and from the Danish patent application no. 1997/76 to which the public has access. 5 The purpose of the present invention is that of remedying the drawbacks of the known patent fuels which are hard to light? o The patent fuel to the invention is characteristic in that the packing is constituted by a rigid, self-supporting shell construction, preferably of cardboard. A patent fuel of this type will be easy to light for the packing may easily be designed or impregnated in such a way that it 5 will burn without any difficulty when you light it. Fur¬ ther, its production cost will be low since the mass pro- production of cardboard packings represents a highly de¬ veloped technique. Finally, the combustible packing will , of course, also be used solely as packing during the trans- o port to the user. One mode of design of the patent fuel according to which the block is enclosed entirely in the packing is characte¬ ristic in that the block and the packing have been designed 5 so in relation to each other that there will be one or more cavities between these, i.e. the block will not fill out the packing entirely. Thus, it will become easier to light the block 'for combustible gases will then be formed in the cavities. When these gases are lit and burn at the block surface, you will be able to reach the lighting temperature for the block. " A " - ' further development of this mode of design with a cylin¬ drical section is characteristic in that the packing sec¬ tion has the shape of a polygon, for instance an isosceles triangle, and in that the block has such a shape that it o will not fill out the packing along the longitudinal edges Thus, it will also be easier to light the packing for you will then have to light a corner of it which is hollow. 5 Another mode of design is characteristic in that the packing along at least one of the longitudinal edges has been impreg¬ nated with or has a covering of a highly combustible mate¬ rial . _ Thus, the lighting will become still easier, and you ensure uniform lighting along the entire length. o A third mode of design is characteristic in that the packing has been designed with protruding parts, preferably in the form of extra surfaces one with the packing material ; these surfaces may be brought to bear against same or be bent out 5 from same. Thus, you may further improve and simplify the lighting. Finally, the patent fuel may be characteristic in that the o packing has been designed as a cardboard box which along one or more edges has been designed with one or more closing flaps designed to be inserted into the box or out into a cover surface-. Using this design one may pull the closing 5 flap or flaps partly out of the assembly immediately prior to lighting. Thus, in addition to easy lighting, you will also obtain good combustion of the appurtenant packing side since it will then be at a distance from the block. After the lighting the flap or the flaps will soon burn through after which the packing side will bend away from the block in a manner favourable to the further combustion process. This invention is explained further with reference to the drawing where Fig. 1 shows a mode of design of a patent fuel to th invention viewed in perspective and partly cu through at the end, o Fig. 2 a section viewed in the direction A-A as show in F g. 1 , and Fig. 3 another mode of design viewed in perspective 5 Figs. 1 and 2 should be viewed as a whole, and the parts bear the same reference figures. A patent fuel block of a outer~shape as a cylinder with the section of a polygon is enclosed in a packing 2 consisting of cardboard. The pa- o eking 2 has a section constituting an isosceles triangle where the base line is at the base. At the longitudinal edges 3, 4, and 5 of the packing 2 the block 1 will not fill out same, and thus longitudinal cavities of triangle sections have been formed. The inclined packing (2) surfa 5 facing forward in Fig. 1 , i.e. the side 6 in Fig. 2, has been shaped as a lid with a closing flap 7 which in Fig. 2 has been shown in a hal f-pul 1 ed-out condition. The pullin out may be performed by means of a pulling flap 8 as shown in Fig. 1. In the half-pull ed-out position it will be par o ticularly easy to light the packing and thus the entire pa¬ tent fuel . There is nothing to prevent you from having more of the flaps shown in the longitudinal direction, possibly at both sides. Along one or more of the edges 3, 4, and 5, the packing may be impregnated using combustible material 5 or provided with protruding flaps 9, a fact facilitating the lighting further. Fig. 3 shows a mode of design shaped like a pyramide. In the corners 10, 11 , 12, and 13 there are cavities intended to facilitate the lighting. Within the limits of the invention, one may imagine many other modes of design of the patent fuel . The patent fuel block may thus have a circular section. The packing will preferably be made from level surfaces so that the patent fuel cannot rol 1.

Claims: P A T E N T C L A- I M S 1. A patent fuel consisting of a block of less combustibl material , wholly or partly enclosed in a packing of more combustible material , which packing may have been impreg¬ nated using a particularly combustible material , c h a - r a c t e r i s t i c i n that the packing (2) is consti - tudcd by a rigid, self-supporting shell construction, pre¬ ferably of cardboard. o 2. A patent fuel to claim 1 according to which the block is mainly entirely enclosed in the packing, c h a r a c t s t i c i n that the block (1) and the packing (2) have been designed so in relation to each other that there will 5 be one or more cavities between these, i .e. the block (1 ) will not fill out the packing (2) entirely. 3. A patent fuel to claim 2 and with a cylindrical sectio (not necessarily a circular-cylindrical section), c h a - o r a c t e r i s t i c i n that the packing (2) section has the shape of a polygon, for instance an isosceles triangle, and in that the block (1 ) has such a shape that it will not fill out the packing (2) along the longitudinal edges (3 , 4, 5) . 5 4. A patent fuel to claim 3, c h a r a c t e r ! ' s t i c i n that the packing (2) along at least one of the longi¬ tudinal edges (3, 4, 5) has been impregnated with or has a covering of a highly combustible material . 0 5. A patent fuel to one or several of the preceding claim c h a r a c t e r i s t i c i n that the packing (2) has been designed with protruding parts, preferably in the for 5 of extra surfaces (9) one ith the packing mate ial ; these surfaces may be brought to bear against same or be bent ou from same. 6. A patent fuel to ' one or more of the preceding claims c h a r a c t e r i s t i c i n that the packing (2) has been designed as a cardboard box which along one or more edges has been designed with one or more closing flaps (7, 8) designed to be inserted into the box or out into a cover surface (6).

Inventors: CAROE C
Applicants: APTUS, CAROE C
Application year: 1979
Main classification: C10L5
IPC codes: C10L5, C10L11