Abstract: There is disclosed herein a clean burning, non-volatile device useful for the ignition of fires in combustible medium such as charcoal briquettes. The device comprises a core composed of wax and cellulosic particles (e.g. sawdust), together with an adjacent absorbant material to take up any oily exudate from the core. The core and absorbant material, with an optional lighter strip for conveying a flame to the core, are enclosed in a flammable, oil impervious container. In use, the device is placed on the combustible medium and the container ignited. The flame is conveyed to the core composition of the device, which in turn burns with sufficient vigor and for a sufficient length of time to kindle a fire in the combustible medium.

Abstract: A plastic bag such as trash can liners, grass and leaf bags, sandwich bags and the like is reinforced by placing spaced ribs therein, integral with the wall structure, the ribs having a rib-to-rib spacing in the order of 1/8 to 2 cm, the ribs being peaked and merging smoothly from a projecting peak to the thickness of the walls between the ribs, the peaks extending about 1.5 to 10 times the wall thickness of the film which is preferably, in the order of about 0.4 to 2.0 mils. Upon extrusion, the extrusion die is formed with small notches with rounded corners so that the ribs are extruded while the film material is extruded, and provide additional material in the region of the ribs which merges smoothly with the material being extruded to form the film. Such rib-reinforced bag structures may be produced by forming a continuous roll of such bags, the individual bags in such a roll being readily separated along predetermined lines of weakness.