| 主权项 |
1. A method for making a cup sleeve from a flat panel of a foldable material, the sleeve having inside dimensions for jacketing a cup, the method comprising:
(a) providing a two-sided flat said panel having a top edge, a bottom edge, a right edge, a left edge, a right flap, a left flap, and a waistline extending from said right edge to said left edge and crossing said right flap and said left flap, said waistline defining an upper panel section above said waistline and a lower panel section below said waistline; wherein,
(i) said right flap is defined by a right upper flap foldline extending from a rightwardly disposed foldpoint on said top edge to a right waistpoint rightwardly disposed on said waistline, and a right lower flap foldline extending from a rightwardly disposed point on said right edge to said right waistpoint, and further wherein said right flap is partitioned between said upper panel section and said lower panel section by a right waist foldline extending from said right waistpoint to a lateral foldpoint on said right edge, said right waist foldline defining a right hinge member dividing said right flap into hingedly foldable upper and lower right flap partitions;(ii) said left flap is defined by a left upper flap foldline extending from a leftwardly disposed foldpoint on said top edge to a left waistpoint leftwardly disposed on said waistline, and a left lower flap foldline extending from a leftwardly disposed point on said left edge to said left waistpoint, and further wherein said left flap is partitioned between said upper panel section and said lower panel section by a left waist foldline extending from said left waistpoint to a lateral foldpoint on said left edge, said left waist foldline defining a left hinge member dividing said left flap into hingedly foldable upper and lower left flap partitions;(iii) said right hinge member is obliquely foldable on said right waist foldline relative to said waistline such that said right flap upper foldline and said right flap lower foldline define an obtuse angle (θ4) around said right waistpoint, said left hinge member is obliquely foldable on said left waist foldline relative to said waistline such that said left flap upper foldline and said left flap lower foldline define an obtuse angle (θ3) around said left waistpoint, wherein angles θ3 and θ4 are equal and opposite;(iv) said upper panel section and said lower panel section are divided by a slit through said panel, said slit extending from said right waistpoint to said left waistpoint and having a slit length equal to half of an intermediate circumference of a cup to be engirdledly jacketed therein; (b) folding said flaps on said right and left flap foldlines so that said flaps are folded inwardly onto a first side of said panel; (c) hingedly folding said lower panel section inwardly-onto said first side of said panel over said upper panel section on said hinge members formed by said waistline foldlines and thereby locking said right and left flaps between said upper panel section and said lower panel section of said panel as folded; (d) with slit downwardly disposed, opening a generally annular center passageway between an inside wall of said upper panel section and an inside wall of said lower panel section, thereby forming an open sleeve with outside sleeve walls and inside sleeve walls; and, (e) inserting the cup into said center passageway of said sleeve and through said slit until engirdledly seated therein, thereby locking said right and left flaps between said inside sleeve walls and a sidewall of the cup engirdledly jacketed therein. |
