Abstract: A resin powder for solid freeform fabrication includes a particle having a pillar-like form, wherein the ratio of the height of the particle to the diameter or the long side of the bottom of the particle is 0.5 to 2.0, the particle has a 50 percent cumulative volume particle diameter of from 5 to 200 ?m, and the ratio (Mv/Mn) of the volume average particle diameter (Mv) to the number average particle diameter (Mn) of the particle is 2.00 or less.

Abstract: A connector means includes a connector housing provided with a plurality of bores which is defined by a pair of plastic bases each having a plurality of hemicycle grooves each of which has an inner diameter 1 to several .mu.m larger than an outer diameter of each of the optical cables to be connected. After the optical fibres are inserted into the respective bores and secured therein, one end surface of the connector housing is polished. A pair of connected housings are retained so that the polished end surfaces abut on each other thereby to attain a connection between a plurality of optical cables.

Abstract: An optical fiber connector comprising a pair of plugs, a sleeve and a pair of cap nuts which is assembled at the site where optical fibers are installed, so as to connect the optical fibers with a high degree of positional accuracy. The plugs and the sleeve are molded of a composition including a synthetic resin added with a suitable content of a filler, such as glass beads.