the decorative sleeve may be further described in relation to fig1 , and 3 , which are self explanatory . in use , the sleeve is expanded along the slit ( 2 ) and slipped over the linear portion of the cane ( 1 ). the inner circumference of the sleeve should be the same or greater than the circumference of the cane exterior . the shape memory of the plastic used to prepare the sleeve will ensure that the sleeve fit tightly against the linear portion of the cane . by the term &# 34 ; substantially linear portion extending for a substantial fraction of the total length of the cane &# 34 ; is meant a portion of the cane having substantially a constant diameter , extending over a length which is at least a substantial fraction of the overall cane length , i . e . 60 percent or more , preferably 75 percent , or more of the overall cane length . by the term &# 34 ; removably mounted &# 34 ; is meant that the plastic sleeve is mounted to the cane by virtue of the mean inside diameter of the sleeve being less than or substantially equal to the outside diameter of the cane , and being removable and replaceable by hand , without resort to the use of tools or other equipment . by the term &# 34 ; whose length is a substantial fraction of the length of the linear portion of said cane &# 34 ; is meant that the sleeve length is greater than 50 percent of the length of the linear portion of the cane , preferably 75 percent or greater , and most preferably substantially the same length as that of the length of the linear portion of the cane . by the term &# 34 ; non - closed cylinder &# 34 ; is mean that the sleeve is a cylinder or cylindrical coil having a slit along its length such that the sleeve may easily be removed or mounted to the cane . such non - closed sleeves are illustrated in fig2 and 3 . by the term &# 34 ; resilient plastic &# 34 ; is meant a polymeric material which has sufficient resilience , or flexibility that it may be expanded along the non - closed portion of the sleeve without permanently deforming . preferably , the cane cover is made of polystyrene , however other plastics such as the polyesters , polypropylenes , polyacrylates , and the like can also be used . the mean diameter of the cover is between 1 / 2 &# 34 ; and 11 / 4 &# 34 ; in the unexpanded mode ( not applied to a cane ), preferably between 5 / 8 &# 34 ; and 3 / 4 &# 34 ;. the length is nominally between 28 and 32 inches , but may be shorter or longer as required . as the sleeves are relatively inexpensive , they may conveniently be manufactured somewhat longer than will ordinarily be necessary , and cut to length by the user . the manufacture of such sleeves is well known to those skilled in the art of plastics fabricating and extrusion and thus need not be described further .
a walking cane is provided with a removable decorative cover which may be changed at will by the user to reflect changes in mood or attire .