illustrative embodiments and exemplary applications will now be described with reference to the accompanying drawings to disclose the advantageous teachings of the present invention . while the present invention is described herein with reference to illustrative embodiments for particular applications , it should be understood that the invention is not limited thereto . those having ordinary skill in the art and access to the teachings provided herein will recognize additional modifications , applications , and embodiments within the scope thereof and additional fields in which the present invention would be of significant utility . in view of the foregoing limitations and shortcomings of the prior art regular rollers , as well as other disadvantages not specifically mentioned above , it should be apparent that there still exists a need in the art of hair rollers which will appeal to women by virtue of their invisibility , as well as to effectively perform the function of curling the hair . there is also a continuing need in the art to expand the possibilities for construction of hair rollers to eliminate or at least very significantly reduce the embarrassment of wearing prior art regular rollers when these prior art regular rollers are visible to others . the difference between the present invention and prior art regular rollers is that the invisible roller is completely covered by hair and thereby hidden from view , even from the sides . fig1 is a front perspective view of an invisible hair curler implemented in accordance with an illustrative embodiment of the present invention . fig2 is a front elevation view of the invisible hair curler of fig1 . fig3 is a sectional side view of the invisible hair curler of fig1 along the longitudinal axis thereof with the holding rod removed . as shown in fig1 - 3 , the inventive curler 10 is an assembly comprising an elongate generally cylindrical body portion 12 and one or more removable rods 14 extending therethrough when in use . the body has a longitudinal axis 13 and a transverse axis 15 . in the illustrative embodiment , the roller body 12 is a hollow or solid cylinder with a proximal end 18 , a mid section 20 and a distal end 22 . in the best mode , the body is perforated with holes 24 to allow for airflow through the roller to create a lighter and more comfortable experience when in use as well as assist in the faster drying of wet hair as well as hair to which a curls - creating product was applied . the proximal and distal ends of the roller 12 are populated with optional protrusions or nubs 26 , about 1 mm in height about the surface of the roller body 12 that serve to maintain the roller in place in the hair when in use . the body 12 may be constructed of plastic , rubber , metal , wood or other suitable material . in the best mode , each curler 10 is approximately 5 cm to 10 cm in length and 1 cm to 3 cm in diameter . the rod 14 should be 4 cm to 6 cm in length and 1 mm to 2 mm in diameter . the roller body 12 may be implemented in different lengths , shapes and sizes , including without limitation : straight , cylindrical , cigar , zeppelin shapes as well as wavy or curved shapes and / or combinations of these shapes . different shapes help allow for a better match between length and type of hair , size or location of desired curl and optimize the winding and holding of hair . fig4 is a sectional end view of the invisible hair curler of fig1 along the transverse axis at the midsection thereof with the holding rod substantially removed . fig5 is an elevated side view of the invisible hair curler of fig1 with the holding rod in a middle position . fig5 a is a sectional end view of the proximal end of the curler of fig5 . fig5 b is a sectional end view of the midsection of the curler of fig5 . while fig4 and 5 illustrate a generally hollow body , those skilled in the art will appreciate that the roller body be hollow , solid , partially hollow or partially solid in the interior and can be made of any material , including without limitation : rubber , plastic , foam , metal , and combinations of these materials without limitation . other cylindrical materials may be used as well such as coils or webs without departing from the scope of the present teachings . as shown in fig1 - 5 , the rod 14 extends through apertures 16 the mid - section of the roller body 12 . however , the apertures may be located elsewhere on the body , including the distal and proximal ends thereof , to allow for the rod to pass therethrough in multiple directions and angles to retain the roller in place as discussed more fully below . for safety , the rod 14 has first and second beads 27 and 28 that cap opposite ends of a shaft 30 thereof . note that in the illustrative embodiment , the shaft 30 has a number of bends 32 that serve to inhibit slippage of the rod 14 out of position when in use . however , the shaft 30 may be straight without departing from the scope of the present teachings . the rod 14 can be made of any materials , including without limitation : plastics , metals and combinations of these materials as well as any new materials as may become available and which are suitable for expressing this part of present invention and design . the rod 14 may be straight , wavy , ridged or curved with or without the small rounded beads 27 and 28 at the ends thereof . the length and diameter of the rod ( s ) depends on roller body material or materials and can vary . in any case , the rod should be sufficiently strong to hold the hair in place without breaking . one or multiple rods 14 can be used and the rods can be located in the center , off - center ( to facilitate inclusion of the hair ends at the start of rolling ) and at both ends of the roller body . the novel operation of the present invention is illustrated in fig6 - 9 below . after combing as necessary , the curler 10 is placed against the strands of hair near the distal end ( most distant from the head ) thereof . the hair 40 is then rolled around the curler 10 as depicted in fig6 a - 6c . the rod 14 easily passes through the hair during the winding . because , in the best mode , the rod 14 is already installed in the curler , all a user needs to do — after completing the winding — is to push it in further to ( firmly ) lock the roller in place . fig6 a is a side view of the invisible hair curler of fig6 in an early stage of engagement with the hair of a user . fig6 b is a side view of the invisible hair curler of fig6 a rotated such that the user &# 39 ; s hair 40 is partially wrapped around the body of the curler 12 . fig6 c is a side view of the invisible hair curler of fig6 a further rotated such that the user &# 39 ; s hair is fully wrapped around the body of the curler . when the hair 40 is fully wrapped around the curler 10 , the rod 14 is pushed through further as shown in fig6 c . as shown in fig6 c , the rod 14 limits rotation of the curler 12 in the counter - clockwise direction and thereby retains the curler in place as well as the curled state of the hair 40 . the rods are moved from the central position to the left or to the right side of a roller to lock the hair in place preventing the hair from unrolling . the user simply pushes the side of the rod which is sticking out of the hair in the general direction of the head of the person whose hair is being curled , to lock the roller in place . these removable holding rod ( s ) assist in hiding the hair roller from view completely . the holding rods firmly hold and keep each roller in place , preventing hair locks from unrolling . unlocking is enabled by means of removing the rods from the body . fig7 shows a perspective view of the invisible hair curler of fig1 installed in one &# 39 ; s hair 40 . as noted above , in the best mode , the rods are installed in the roller body prior and during winding . those skilled in the art will appreciate that in the alternative methodological embodiment , the hair may be wrapped in the roller without the rod installed until it is fully curled and ready to be secured without departing from the scope of the present teachings . typically , during winding , both ends of the rods stick out of the body outside the central roller as shown in fig6 a . fig8 is a rear perspective view of the head of a user of a number of invisible hair curlers , shown in phantom , in accordance with the present teachings . fig9 is a rear perspective view of the head of a user of a number of invisible hair curlers in accordance with the present teachings . fig1 is a rear perspective view of the head of a user of a number of conventional hair curlers in accordance with the prior art . fig8 and 9 illustrate that when the curlers 10 are installed as shown in fig8 , they are not visible as depicted in fig9 . the resulting appearance of the user &# 39 ; s head using the inventive curlers as depicted in fig9 will be seen as being more attractive — i . e . less unsightly and less unbecoming — than that of a user of conventional curlers as depicted in fig1 . moreover , a particularly advantageous aspect of the invention is that the curls may be secured permanently without the deleterious application of heat or other means that might be damaging to the hair . the curlers 10 can be transparent or have a color close to the hair color itself . the invisible hair rollers of the present invention should be fabricated of a material that will not deteriorate or deform under high temperature operating conditions . thus , the present invention has been described herein with reference to a particular embodiment for a particular application . those having ordinary skill in the art and access to the present teachings will recognize additional modifications , applications and embodiments within the scope thereof . it is therefore intended by the appended claims to cover any and all such applications , modifications and embodiments within the scope of the present invention .
a hair curler comprising a cylindrical body having a longitudinal axis and a transverse axis and a removable rod extending through the body along the transverse axis thereof . the inventive curler enables a novel method of curling hair including the steps of curling the hair around the curler comprising a cylindrical body having a longitudinal axis and a transverse axis and a removable rod extending through the body along the transverse axis thereof and securing the curled hair to the head of a user by inserting a rod through the body of the curler along the longitudinal axis thereof . in the illustrative embodiment , the cylindrical body is perforated and has multiple protrusions . the cylindrical body has a variable diameter with tapered ends . the diameter of the body is smaller in the middle section thereof . the rod is beaded and has bends therein .