| 摘要 |
A method for applying a pattern (21,57) of granular material (12, 12b, 12c, 12d) on a receiving surface (13), comprising in sequence associating said granular material (12, 12b, 12c, 12d) with a transferring surface (3) together with a liquid aggregating phase (9, 20) and according a prefiguration (10, 10b, 18, 56) of said pattern; facing said transferring surface (13) in a transferring zone (15, 45); the method further comprises heating at least one portion of said liquid phase (9, 20) in said transferring zone (15) in order to detach from said transferring surface (3) said granular material (12, 12b, 12c, 12d) and applying the latter on said receiving surface (13). An apparatus (1, 1b) for applying a pattern (21, 57) of granular material (12, 12b, 12c, 12d) on a receiving surface (13), comprises: a transferring surface (3) movable along a loop path with a transferring zone (15) defined in a portion facing said receiving surface (13); applying means (8, 8b, 11, 11 b, 11c, 11 d) arranged upstream of said transferring zone (15), suitable for applying said granular material (12, 12b, 12c, 12d) on said transferring surface (3) together with an aggregating liquid phase (9) and according a prefiguration (10, 18, 56) of said pattern (21, 57); the apparatus further comprises heating means (16, 25, 26, 46, 47, T) suitable for suddenly evaporating in said transferring zone (15) at least one portion of said aggregating liquid phase (9, 20) and thus cause said granular material (12, 12b, 12c, 12d) to detach from said transferring surface (3) and to cause said applying on said receiving surface (13). |
