[ 0026 ] fig1 through 7 show three embodiments of an anchor system for a flexible marker post installed in the ground . the posts are used primarily along roadways to mark the edges of lanes or for other forms of traffic control . though not required , the anchor systems are preferably installed in a pre - dug hole and rely on friction with the ground and the weight of dirt filled into the hole above the installed anchor to hold the post and anchor in place . the components of each system are made from sheet steel and may be flat or bent . this system provides a simple installation method and protects the lower end of the post while it is being installed . [ 0027 ] fig1 and 2 depict a three - piece flat anchor system comprising a post anchor 111 having a u - shaped cross - section , a plastic post 113 , and a tool or driver 115 for installing post 113 and anchor 111 into the ground . post anchor 111 is preferably formed by bending a wide , rectangular sheet of steel along its central longitudinal axis to form the u - shape . post anchor 111 has an upper surface 112 , a lower surface 114 , and bent side edge 116 . the other side edge of anchor 111 is open . plastic post 113 is rectangular and has a width in one embodiment that is ¼ ″ to ½ ″ narrower than post anchor 111 . post 113 is flexible and is formed of an elastomeric material . the inner and outer surfaces of anchor 111 surround the lower portion of post 113 . post 113 is a preferably - flat strip having a width greater than its thickness . driver 115 is a long , flat , rectangular plate also preferably made of steel and which is narrower than post anchor 111 , but any tool with a flat lower edge , preferably measuring a minimum of 4 ″ by ¼ ″, can be used to drive the anchor system into the ground . the post 113 may be installed in the ground with one of several different methods , depending primarily upon the hardness of the ground and the tool used to install the post . for example , if the post 113 is being installed in soft earth , no hole or pre - hole is required , even if a manual installation driver 115 is used . if the post 113 is being installed in a harder or more dense material or soil , a pre - hole may need to be formed with the driver 115 prior to installation . if the soil is rocky , paved , or otherwise very hard and / or dense , an automated pneumatic device , such as a jackhammer ( not shown ), is recommended to install the post 113 . in some instances , a hole may be dug having a width of approximately 4 ″ and a depth of about 18 ″ for the above - dimensioned post anchor 111 . the full width of the lower end of plastic post 113 is inserted into the open edge of post anchor 111 , and the assembled post anchor 111 and post 113 are laid across the hole , the width and length of post anchor 111 being centered over the hole . post 113 should be oriented so that it faces the desired direction after installation . the flat lower end of driver 115 is placed against the top of upper surface 112 of post anchor 111 , and driver 115 is forced downward to push the assembly into the hole . as post anchor 111 is driven into the hole , the force of the ground opposing the insertion causes the two longitudinal ends to bend upward around a generally - central lateral axis , as shown in fig2 the axis defined by the position of the lower edge of driver 115 . the lower portion of post 113 bends with post anchor 111 as it is sandwiched between surfaces 112 , 114 . this causes post 113 to stand upright and in the correct position once post anchor 111 has been driven into the hole . to complete the installation , driver 115 is removed , and the hole is filled by placing dirt 117 on top of post anchor 111 as shown in fig8 . the friction between post 113 and the inner surface of post anchor 111 retains post 113 within post anchor 111 . the weight of dirt 117 , the friction between the outer surface of post anchor 111 and walls 119 of the hole , and the angle of the longitudinal ends of post anchor 111 relative to vertical walls 119 of the hole combine to retain post anchor 111 in the ground . post anchor 111 can be bent along a central lateral axis during fabrication or prior to installation to produce a v - shape as shown in fig2 . this would ease alignment and initial insertion , but would require an additional step in manufacturing post anchor 111 . a second embodiment of the anchor system is shown in fig3 and 4 . this system is a four - piece flat design comprising a post guide 211 , a post 213 , a driver 215 , and an insert 217 . post guide 211 and insert 217 are flat , rectangular sheets of steel with a horizontal area approximately equal to that of post anchor 111 shown in fig1 and 2 . driver 215 is the same as that in the first embodiment , and installation follows the same procedure as described above . post guide 211 and insert 217 are placed on opposite sides of a lower portion of post 213 . as shown in fig4 these components also may be bent along a central lateral axis prior to insertion in the ground , forming a v - shaped trough having upward - and - outward - extending legs . [ 0033 ] fig5 and 6 show a third embodiment of the present invention comprising four pieces . shown in fig5 are rectangular tabs 319 depending from the lower surface of insert 317 along the central lateral axis . insert 317 and post guide 311 are preferably bent during fabrication or prior to installation to assist in aligning the components to each other and to reduce the possibility that tabs 319 will be bent during installation . the lower end of plastic post 313 is positioned in post guide 311 , and insert 317 is placed onto the upper surface of the post 313 with tabs 319 in contact with post 313 . tabs 319 cut through plastic post 313 as the assembly is driven into the ground , and post 313 slides upward into notches 321 between tabs 319 . this provides a metal - to - metal contact between tabs 319 and post guide 311 and protects post 313 from being damaged by the force between a lower surface 323 of insert 317 and an upper surface 325 of post guide 311 . tabs 319 do not extend through post guide 311 . installation using a pre - bent anchor system is similar to that of the systems using flat components . post guide 311 is inserted into the hole with the v - shape opening upward and the lateral axis perpendicular to the desired direction to which a front side of post 313 will be exposed . the lower end of post 313 is lowered into the hole and inserted in post guide 311 . insert 317 is placed into the hole and onto post 313 with the same orientation as post guide 311 . the lower edge of driver 315 is placed against the vertex of the v - shape on an upper surface 327 of insert 317 with the lateral axis of driver 315 being parallel to that of insert 317 . driver 315 is forced downward to push the assembly into the ground . a fourth embodiment of an anchor system of the invention is shown in fig7 . this system is a three - piece design comprising a post anchor 411 , a post 413 , and a driver ( not shown ). post 413 is shown as having a curved front surface 415 , though post 413 may alternatively have a flat front surface 415 . post anchor 411 is a rectangular sheet of preferably mild steel that is bent along three longitudinal axes to form a v - shaped lower portion 417 and coplanar , horizontal , longitudinal surfaces 419 connected along the upper edges of lower portion 417 . the v - shape of lower portion 417 is a trough having upward - and - outward - extending legs , the trough opening upward . surfaces 419 extend inward from the upper edges of lower portion 417 and toward each other . in this embodiment , surfaces 419 do no touch each other , but surfaces 419 and lower portion 417 partially surround an enclosure 421 having open ends 423 , 425 and being sized for receiving post 413 . to install post 413 using post anchor 411 , post 413 is inserted into enclosure 421 . a pilot hole is created in the earth as described above , then anchor 411 is placed over the hole , anchor 411 being generally centered over the hole . a flat - bladed driver , such as that shown in previously - described embodiments , is used to drive anchor 411 into the earth . for best results , the blade of the driver preferably contacts anchor 411 approximately along line 427 . as anchor 411 is driven into the earth , the longitudinal ends of anchor 411 are bent upwards around line 427 ( or wherever the blade of the driver contacts anchor 411 ), producing a v - shape having a lateral axis , and post 413 assumes a vertical orientation . as described above , friction between post 413 and the inner surfaces of anchor 411 retains post 413 within anchor 411 , and mechanical interference and friction with the earth retains anchor 411 within the hole . a fifth embodiment of an anchor system of the invention is shown in fig9 and 10 . this system is also a three - piece design comprising a post anchor 511 , a post 513 , and a driver or automated device ( not shown ). in one version of this embodiment , the respective materials used to form post anchor 511 and post 513 are designed to be heavier gauges and more resilient ( e . g ., steel and fiberglass / plastic ). post 513 is shown as having a lower end 515 , and post anchor 511 is a generally rectangular structure of preferably mild steel that is pre - bent along two longitudinal portions and one lateral portion . the resulting configuration is generally v - shaped with a vertex 517 and coplanar , longitudinal flanges 519 extending upward from just above vertex 517 . resilient front and rear plates 523 , 525 extend upward from vertex 517 . flanges 519 are integrally formed with and extend from rear plate 525 toward each other but do not touch . a thin retention sleeve or pocket is defined between rear plate 525 and flanges 519 and is sized to receive the post 513 . the lower ends of the flanges 519 may be pinched to form a seat 526 upon which the lower edge of post 513 abuts . post anchor 511 also may be provided with an optional small , bisecting , longitudinal ridge 521 that is located on rear plate 525 , vertex 517 , and front plate 523 . ridge 521 is centrally located between flanges 519 for additional strength . to install post 513 using post anchor 511 , the lower end 515 of post 513 is inserted into the pocket defined between flanges 519 and rear plate 525 . post anchor 511 is then punch pressed or similarly deformed at several locations on flanges 519 and / or rear plate 525 , such as those indicated at deformations 527 . deformations 527 ensure retention of post 513 in post anchor 511 by penetrating portions of the rear plate 525 and the flanges 519 into the post 513 . as described above , no hole , a pilot hole , or an anchor - sized hole is created in the earth , and anchor 511 is placed at the burial site or over or in the hole , with anchor 511 being generally centered in the hole . with this embodiment of the present invention , a pneumatic tool , such as a jack hammer , may be used to drive anchor 511 into the earth . however , a flat - bladed driver , such as that shown in previously - described embodiments , can be used to drive anchor 511 into the earth . for best results , the blade of the driver preferably contacts anchor 511 approximately along vertex 517 . as anchor 511 is driven into the earth , the front and rear plates 523 , 525 of anchor 511 may deflect toward each other about vertex 517 , and post 513 assumes a vertical orientation as it extends above the earth . as described above , mechanical interference and friction with the earth retains anchor 511 within the hole . however , because post 513 is mounted to post anchor 511 in the manner described above , post 513 is not deformed or bent other than the slight perforations or indentations caused by deformations 527 . thus , post 513 retains its substantially linear configuration even after it is installed in the earth with post anchor 511 . this design allows post 513 to be formed from materials that are much more rigid and less flexible than those used for the posts described above for the other embodiments . referring now to fig1 - 13 , a sixth embodiment of an anchor system of the present invention is shown , comprising a post anchor 611 , a post 613 , and a driver or automated device 616 ( see fig1 ). this embodiment is very similar to the fifth embodiment of fig9 and 10 , except that the flanges 619 of the post anchor 611 extend from end to end , and the post anchor 611 initially has a generally flat configuration , rather than a preformed v - shaped configuration . initially , the post anchor 611 is undeformed ( fig1 ) such that a pair of flanges 619 extend from its substantially planar base 612 at acute angles as shown . post 613 is inserted into a pocket of the undeformed post anchor 611 such that a lower end 615 of post 613 substantially aligns with one end of the post anchor 611 . the flanges 619 are then deformed or bent down toward each other and onto the post 613 as shown in fig1 , to permanently retain the post 613 in the post anchor 611 and form an assembly . this process may include puncture deformations , as previously described above . the assembly is installed in the ground in a manner similar to that described above . since the assembly is flat , it is simply placed on the ground at the point of insertion . a small pilot hole or a larger hole may be formed if necessary to penetrate the ground . however , in most instances , no hole of any type will be required . the assembly is struck with a driver 616 or other tool ( fig1 ) and driven into the ground . as the assembly is installed , it forms a v - shaped configuration having a vertex 617 , a front plate 623 , and a rear plate 625 . note that in this version , the flanges 619 are also formed in the v - shape opposite front and rear plates 623 , 625 . the invention provides for several advantages . using the anchor systems of the invention makes the installation of flexible posts both easy and quick , typically allowing one person to install a post in less than two minutes . since the anchor systems are hidden underground , they are tamper resistant . the anchor systems also provide an installation that strongly resists the post being pulled out of the ground . while the invention has been shown in only some of its forms , it is not thus limited but is susceptible to various changes and modifications without departing from the spirit thereof . for example , in some cases , sufficient force may be applied by the driver to insert the anchor and lower end of the post into the ground without digging a hole in advance . also , posts could be automatically installed from a vehicle that continuously moves along the desired path .