| 摘要 |
INTRAORAL DENTAL RADIOGRAPHIC FILM PACKET IMPROVEMENT A comfort-enhancing improvement upon u known dental film packet having sensitized film (10) and protective opaque (12, 14) sheets enclosed by a light-tight envelope (16) that includes an opposed pair of generally parallel walls (16b and 16c, 16f) covering the sheets (10, 12, 14), those walls (16b and 16c, 16f) being joined together along facing marginal areas thereof (16bm and 16cm, 16fm) surrounding the sheets (10, 12, 14) so as to define a main body portion (16MB) and a perimetric edge portion (16PE) of the envelope (16). The improvement is characterized by a pliant bead (B) of substantially non-porous, non-toxic, polymeric elastomeric material, preferably a silicone resin, that is molded in situ around at least part of the perimetric edge portion (16PE) to encapsulate that part of the edge portion (16PE) with such material and thereby provide the encapsulated part with a softer, smoother, and more rounded peripheral surface (PS). In the molding process illustrated, the polymeric elastomeric material (RCV) is injected (40) under pressure (A) into a mold peripheral channel (30p) of circular cross section surrounding the envelope edge portion (16PE), and the mold (30) is then heated for optimal, low-temperature, controlled curing of the bead formed therein. |
