NOVELTY - Portable pellet maker (000) for producing densified pellets from biomass comprises: means for receiving and holding biomass to be pelletized; means for compressing and extruding biomass; means for slicing the extruded biomass into pellets of desired size, means for powering the pellet maker; and means for routing and collection of pellets being outputted by pellet maker.    USE - The portable pellet maker is used for producing densified pellets from biomass (claimed), where the densified pellets are used as renewable source of clean energy.    ADVANTAGE - The portable pellet maker: provides the densified pellets having smaller size with high volumetric calorific value, less ash content and high durability and uniform size; reduces bulk density of input biological raw materials, thus minimizing their transportation costs, storage volume requirement and difficulty of handling; reduces moisture content of the input biological raw materials, thus increasing shelf life, resistance to biodegradation and product disintegration; is easy to clean and maintain, portable, durable, economical to operate and amenable for operations even by a layman while resulting in large-scale production of high quality pellets without dependency on a particular type of biological raw material; and does not require extrinsic additive chemicals including binders, plasticizers and softening agents.    DETAILED DESCRIPTION - Portable pellet maker (000) for producing densified pellets from biomass comprises: means for receiving and holding biomass to be pelletized; means for compressing and extruding biomass; means for slicing the extruded biomass into pellets of desired size; means for powering the pellet maker; and means for routing and collection of pellets being outputted by pellet maker. The means for receiving and holding biomass to be pelletized are adapted by incorporation of a clamping arrangement so as to be readily detachable for ease of cleaning and maintenance, the means for compressing and extruding biomass are adapted to provide optimum increasing pressures of 50-150 MPa and a temperature of 150 degrees C, in-situ, necessary for progressive biomechanical compaction of biomass to the true density of component ingredients in the biomass, and the means for compressing, extruding and slicing the extruded biomass are all adapted for mounting on and being driven by a common shaft (008) that rotates at constant speed of 110 rpm being driven by a single motor (013) and a worm gear assembly (010) through a sealing vessel (017), where the assembly is adapted via set of castors for portability to allow performance of pelletization at the site from where biomaterial is sourced. INDEPENDENT CLAIMS are also included for:    (1) an improved flat-die extrusion method for producing densified biomass pellets using the pellet maker, in which biomechanical compaction of biomass to the true density of component ingredients in the biomass at increasing pressures of 50-150 MPa and a temperature of 150 degrees C cause the protein and starch content in the biomass to plasticize and act as binder, the starch content to gelatinize, the lignin content to act as glue and to negate the need of any extrinsic additive chemicals including binders, plasticizers and softening agents while resulting in an improved pellet product; and    (2) a densified biomass pellet prepared by the method, where the densified biomass pellet has an average calorific value of 1-8 kcal/g, an ash content of 2-10% of the mass of the pellets upon combustion, and pellet durability index of 90-95%.    DESCRIPTION OF DRAWING(S) - The figure shows a vertical sectional view of the pellet maker visualized from lateral side.    Pellet marker (000)    Common shaft (008)    Worm gear assembly (010)    Single motor (013)    Sealing vessel (017)