Abstract A mold for making a light reflector having, on a side away from that side facing external light rays, one light-transmitting plane surrounded by three light reflecting units in contiguous relationship. Each reflecting unit has an irregular nonagonal configuration in plan view and has an inner triple reflecting plane structure contiguously surrounded by an outer triple reflecting plane structure. The inner triple reflecting plane structure has a regular hexangle configuration in plan view and the central apex of this hexagon projects toward the outer side of this light reflector. One plane of the inner triple reflecting plane structure and the contiguous two planes of the surrounding outer triple reflecting plane structure constitute one light reflecting element. The apex formed by these three planes is directed toward the inner side of the reflector. The reflecting unit is formed by three of said elements. The light-transmitting plane has a regular triangle shape, the three apexes thereof lying on the lines of conjugation between contiguous adjacent reflecting units. Such a reflector is superior in reflecting efficiency because that very little non-working area and can be made easily at a low cost. Moreover, the mold therefor can be applied to any known reflector shaping machine.
A mold for shaping a light reflector, comprising: a. a plurality of central pins each having a regular hexagonal cross-section and having on one end three square flat planes joined with each other at right angles to form an apex projecting toward the outside of the mold, and, b. a further plurality of adjacent pins each having a regular hexagonal cross-section and having, on one end, two planes at right angles to each other on the opposite sides of a common edge, said common edge being inclined with one end of said common edge projecting toward the outer side of the mold relative to the longitudinal axis of said adjacent pin at an angle the same as that of any two of the three square flat planes on said one end of the central pin relative to the longitudinal axis of the central pin, and also having, at said one end of the adjacent pin, a plane crossing said common edge line, c. each of said central pins being surrounded by six of said adjacent pins with each of the three flat planes of the central pin meeting at its two outer edge lines two flat planes of two of the surrounding adjacent pins at right angles.
Claim 2
Dependent Claim
207 words
A mold for shaping a light reflector, comprising: a. a plurality of central pins each having a regular hexagonal cross-section and having on one end three square flat planes joined with each other at right angles to form an apex projecting toward the outside of the mold, and, b. a further plurality of adjacent pins each having a regular hexagonal cross-section and having, on one end, two planes at right angles to each other on the opposite sides of a common edge, said common edge being inclined with one end of said common edge projecting toward the outer side of the mold relative to the longitudinal axis of said adjacent pin at an angle the same as that of any two of the three square flat planes on said one end of the central pin relative to the longitudinal axis of the central pin, and also having, at said one end of the adjacent pin, a plane crossing said common edge line, c. each of said central pins being surrounded by six of said adjacent pins with each of the three flat planes of the central pin meeting at its two outer edge lines two flat planes of two of the surrounding adjacent pins at right angles.
Claim 3
Dependent Claim
56 words
A mold for shaping a light reflector according to claim 1, in which said central pins and said adjacent pins have therebetween a numerical relationship such that, when the number of said central pins is designated as n, the number of said adjacent pins is 4n + 3, provided that n is 2 at the least.