The invention relates to a method for forming a fastener having fastener members wherein molten polymer material is deposited by a deposition device onto a contact release surface, thereby forming preform projections, which contact the front surface of a carrier with their terminal ends and bond to the carrier. The buffer has a FIFO configured of a plurality of stages, each stage of the FIFO is capable of storing one unit of digital data, the buffer as a whole is capable of storing digital data in number of units equivalent to the number of configured stages. In preferred embodiments the present invention is used to create models of subatomic particles and other things in our Universe such as atoms, molecules, electricity, magnetism, gravity, Black Holes, galaxies, the Big Bang, and our Universe itself, including its shell. The shielding elements have improved dielectric properties and a simultaneously material-saving structure. A filter cleaning device are provided for cleaning the filter.