Abstract:
A clip connector seaming apparatus having upstanding projections arranged in sections to point inwardly on the lateral and longitudinal axes adapted to join a plurality of modular floor covering units comprising a modular floor covering is provided. The clip connector may comprise a releasable silicone backing and a pressure sensitive tape to affix or “tack” the clip connector to a supporting surface. The clip connector does not require any spray adhesives or additional glue to affix floor covering units to a support surface and is resistant to wear, moisture, excessive force. The clip connector may also be reusable to provide for replacing individual floor covering units.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
       [0001]    The present invention claims benefit of priority to U.S. Prov. Pat. App. No. 62/072,729, entitled MODULAR FLOOR COVERING SEAMING APPARATUS AND METHOD, filed on Oct. 30, 2014, (Lautzenhiser et al.) and is incorporated by reference herein in its entirety. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    The present invention pertains to the art of carpets and, more particularly, to an apparatus for use in joining adjacent sections of modular floor covering units. More particularly, the present invention relates to an apparatus and method for using said apparatus as a connector for joining a plurality of modular floor covering units to one another and to a supporting surface. 
         [0004]    2. Discussion of the Prior Art 
         [0005]    In the field of modular floor covering unit installation, existing methods of installing such floor coverings typically involve a very labor and material intensive process. The process involves individually gluing down floor covering units using an adhesive. The adhesive is heavy, difficult to apply, costly, difficult to remove, and prone to failure. Using the prior art method, adhesive must be applied to the entire supporting surface or the entire underside of a floor covering unit. This process is costly in both labor and money and creates additional costs if floor covering units are to be replaced or removed. 
         [0006]    Another method known in the art for installing modular floor covering units involves using adhesive connectors to connect modular floor covering units with adjacent units. Such “connector systems” of the prior art allow the modular floor covering to “float” on top of the supporting surface. These prior art systems use an adhesive to hold the edges of the adjacent flooring units together. One such system and method is the SYSTEM FOR CARPET TILE INSTALLATION, U.S. Pat. No. 8,434,282, issued May 7, 2013 (Scott et al.), which is incorporated herein by reference in its entirety. The method described in Scott et al. utilizes a one sided pressure sensitive adhesive tab that is approximately 72 mm square that has a releasable protective layer to join four sections of modular flooring units together. There a several problems with using this method to install a modular floor covering. 
         [0007]    The modular flooring units are typically heavy in nature and the bond between the tile connector and modular flooring unit is relatively weak compared to traditional adhesives. In the Scott et al. tile connector, the connector is formed from an inert plastic that is coated with an adhesive. Although the connector is water resistant, it is not completely waterproof. This may cause the connector to fail under some conditions. Floor covering units are constantly under attack from moisture. The Scott et al. prior art claims the connectors are water resistant because the connectors only have adhesive on one side, the upwards facing side, making the connector less susceptible to moisture from the subfloor. However, this ignores adhesive failure from moisture sources above the connector. For example, a business such as a hotel may steam clean the floor covering unit connected by a Scott et al. type adhesive connector. Further the floor frequently may have liquids spilled on it and may experience wet winter conditions. This “wetting” occurs from above and moisture leeches down onto the face of the prior art connector, making it highly susceptible to moisture and potential connector failure. 
         [0008]    The Scott et al. type prior art tile connectors have a high rate of failure in areas of heavy traffic and along modular flooring unit seams. Heavier traffic from office equipment, foot traffic, chairs etc. puts a strain on these connectors. The strain from heavier traffic may cause the connectors to fail in one or more ways. 
         [0009]    The first type of failure for the Scott et al. type adhesive connectors is that the glue will stretch or fail under a heavy force such a chair rolling or other heavy object being moved across the floor covering. To address this problem, modular floor covering installers may use a spray adhesive in a can to supplement this type of adhesive connector system to give the seams of the modular floor covering extra strength. However, doing so removes most of the advantages of this type of connector system and introduces volatile organic chemicals (“VOCs”) into the installation area. VOCs present in the installation area require at a minimum additional ventilation and may also necessitate installing the modular floor covering after work hours when an area is subject to much lower traffic. 
         [0010]    The second type of failure occurs if there is an excessive force in one direction. If such a force is imparted on the connector, the adhesive connector will fail altogether and “bunch up” underneath the modular flooring unit causing a “profiling” underneath that can be seen above the surface of the modular flooring unit. 
         [0011]    Furthermore, the Scott et al. type prior art connector may only be used with modular floor covering units having a proprietary backing (e.g., a composite glass backing) that is used in the manufacturing process. 
         [0012]    There also exist other carpet seaming methods for joining together two segments of floor covering material along long, straight seams. Such methods include CARPET SEAMING APPARATUS AND METHOD OF UTILIZING THE SAME, U.S. Pat. No. 5,800,664, issued Sep. 1, 1998 (Covert), and SEAMING APPARATUS AND METHOD, U.S. patent application Ser. No. 14/309,632, filed Jun. 19, 2014, (LeBlanc et al.), both of which are incorporated herein by reference in their entirety. 
         [0013]    What is needed is a modular floor covering unit connector for joining adjacent modular floor covering units that is resistant to pressure, lateral force, moisture, high traffic, heavy loads, and excessive wear that may be used on a variety of support surfaces to join multiple types of modular floor covering units. 
       SUMMARY OF THE INVENTION 
       [0014]    The carpet tile seaming apparatus, or clip connector, of the present invention provides a durable seam for joining modular tile floor covering units. The seam secured by the clip connector is both more secure and more durable than those in the prior art. The pressure sensitive tape used in the clip connector is waterproof to provide wear resistance in high traffic, frequently cleaned indoor applications. 
         [0015]    The clip connector of the present invention may comprise an electro-galvanized steel coil metal plate with an approximate thickness of 0.40 mm. The metal used in the production of the clip connector may comprise 100% recycled materials. The back side of the clip connector may comprise a pressure sensitive fiber tape of approximately 0.1 mm in thickness and a releasable silicone tape protective layer which also serves as a moisture barrier. The clip connector may comprise a set of upwardly angled metal projections that are laterally and vertically opposed to one another. Each clip connector according to the present invention may comprise upstanding projections that penetrate the backing of a floor covering unit on two axes (laterally and longitudinally). 
         [0016]    Score lines starting at the corners of the clip connector and projecting inwards towards the center may be stamped into the electro-galvanized plate to help an installer line up the four corners of the modular floor covering units to be joined by the clip connector. The score lines may be used as guides for an installer so that approximately ¼ of the clip connector is utilized per modular flooring unit. The clip connector may have an approximate length and width of 76 mm. The clip connector also comprises a flat center having an area that is approximately 36 mm square. During installation, the clip connector would typically be positioned such that ¼ of the surface of the clip connector is in contact with each of the floor covering units being joined by the clip connector. 
         [0017]    Support surfaces or subfloors, such as concrete, on which the clip connector may be installed may “sweat” creating moisture underneath the clip connector. Any adhesive system including adhesive connectors will be exposed to this moisture and as with any adhesive, may eventually break down potentially causing failure of the adhesive connector. This moisture can cause failure of complete glue down modular floor covering installations and of adhesive connector floor covering installations. When the clip connector of present invention is used to secure modular floor covering units, the releasable silicone layer acts as a vapor barrier to the “sweated” moisture. 
         [0018]    With the prior art methods, installing modular floor covering units in a large area in straight rows can be difficult. The present invention provides for a “tacking” system during the installation process that enables an installer to “tack” the clip connector to the subflooring at intervals to ensure that a row will stay true on a long run of modular flooring. This “tacking” during the installation process substantially reduces human error and alleviates the problem of having to reinstall a substantial amount of the installed modular floor covering units. The “tack” system used by an installer is primarily used to assist in the installation process. If the “tack” system fails in the future due to moisture from the subfloor, the clip connector will still not fail or move as the clip connector&#39;s upstanding projections will keep the modular floor covering unit in place. The electroplating of the clip connector makes the clip connector impervious to moisture as well. 
         [0019]    Unlike the adhesive connectors of the prior art that may only be used with proprietary modular floor covering unit backings, the clip connector of the present invention may be used with any backing of any floor covering unit. The clip connector of the present invention may also be used if an old floor covering unit is not replaced or removed but is instead covered over if such an application is approved by the floor covering unit manufacturer. 
         [0020]    In one embodiment, the present invention provides an apparatus for joining modular floor coverings, the apparatus comprising: a plate having an upper surface and a lower surface, said lower surface being substantially smooth and said upper surface having a perimeter edge and being divided into a flat central zone and a set of edge zones, said set of edge zones extending transversely along said perimeter edge between said perimeter edge and said flat central zone; a plurality of sharp projections extending upwardly at spaced locations from said set of edge zones, said projections having a top and body portion, the top being tapered to promote piercing engagement with a floor covering backing and the body extending upwards from the upper surface at an angle of less than 90 degrees, and said projections extending inwardly towards said central zone; and an adhesive layer positioned on said lower surface, said adhesive layer covered by a releasable backing; wherein said plate is adapted to be positioned on a supporting surface to join a set of modular floor covering units having a backing positioned on said upper surface of said plate, and wherein said plurality of sharp projections are adapted to engage said backing to secure said modular floor covering units. 
         [0021]    The apparatus according to the embodiment may further comprise wherein said upper surface further comprises a set of score lines. The plate may be rectangular. The apparatus may further be adapted to join a plurality of modular floor covering sections wherein each of said plurality of said floor covering sections is engaged by an equal percentage of said sharp projections. The plate may comprise an electro-galvanized plate. The releasable backing may be a releasable silicon backing. The releasable backing may be adapted to block moisture. The sharp projections may be 5 mm in length from an attached proximal end to said top. The edge zones may comprise two laterally oriented edge zones and two longitudinally oriented edge zones. The sharp projections in said edge zones may be adapted to engage said floor covering units on a lateral axis and on a longitudinal axis. The sharp projections in said edge zones may be adapted to engage said floor covering units from a plurality of directions and wherein said sharp projections are adapted to prevent said floor covering units from moving along or away from a seam created by adjacent floor covering units. 
         [0022]    In another embodiment, the present invention provides an apparatus for joining modular floor coverings, the apparatus comprising: a plate having an upper surface and a lower surface, said lower surface being substantially smooth and said upper surface having a perimeter edge and being divided into a flat central zone and a set of edge zones, said set of edge zones extending transversely along said perimeter edge between said perimeter edge and said flat central zone; a plurality of sharp projections extending upwardly at spaced locations from said set of edge zones, said projections having a top and body portion, the top being tapered to promote piercing engagement with a floor covering backing and the body extending upwards from the upper surface at an angle of less than 90 degrees, and said projections extending inwardly towards said central zone; and wherein said plate is adapted to be positioned on a supporting surface to join a set of modular floor covering units having a backing positioned on said upper surface of said plate, and wherein said plurality of sharp projections are adapted to engage said backing to secure said modular floor covering units. 
         [0023]    The embodiment may further comprise wherein said upper surface further comprises a set of score lines. The plate may be rectangular. The apparatus may further be adapted to join a plurality of modular floor covering sections wherein each of said plurality of said floor covering sections is engaged by an equal percentage of said sharp projections. The plate may comprise an electro-galvanized plate. The apparatus may further comprise an adhesive layer positioned on said lower surface, said adhesive layer covered by a releasable backing. The releasable backing may be a releasable silicon backing adapted to block moisture. The sharp projections may be 5 mm in length from an attached proximal end to said top. The edge zones may comprise two laterally oriented edge zones and two longitudinally oriented edge zones. The sharp projections in said edge zones may be adapted to engage said floor covering units on a lateral axis and on a longitudinal axis. The sharp projections in said edge zones may be adapted to engage said floor covering units from a plurality of directions and wherein said sharp projections are adapted to prevent said floor covering units from moving along or away from a seam created by adjacent floor covering units. 
         [0024]    In yet another embodiment, the present invention provides a method for joining modular floor coverings, the method comprising: placing a connector plate on a supporting surface, said connector plate comprising: a plate having an upper surface and a lower surface, said lower surface being substantially smooth and said upper surface having a perimeter edge and being divided into a flat central zone and a set of edge zones, said set of edge zones extending transversely along said perimeter edge between said perimeter edge and said flat central zone; a plurality of sharp projections extending upwardly at spaced locations from said set of edge zones, said projections having a top and body portion, the top being tapered to promote piercing engagement with a floor covering backing and the body extending upwards from the upper surface at an angle of less than 90 degrees, and said projections extending inwardly towards said central zone; and positioning a first floor covering unit having a backing on the connector plate such that the backing of the first floor covering unit covers a first portion of the upper surface of the connector plate; and securing the first floor covering unit on the connector plate by applying a pressure on the first floor covering unit such that the backing is penetrated by and engaged with the plurality of sharp upstanding projections of the connector plate. 
         [0025]    The embodiment may further comprise wherein said upper surface further comprises a set of score lines and wherein the first floor covering unit is aligned on said connector plate at least in part by said score lines. The plate may be rectangular. The method may further comprise positioning a second floor covering unit having a backing on the connector plate such that the backing of the second floor covering unit covers a second portion of the upper surface of the connector plate; and securing the second floor covering unit on the connector plate by applying a pressure on the second floor covering unit such that the backing is penetrated by and engaged with the plurality of sharp upstanding projections of the connector plate. The plate may comprise an electro-galvanized plate. The connector plate may further comprise an adhesive layer positioned on said lower surface, said adhesive layer covered by a releasable backing. The releasable backing may be a releasable silicon backing adapted to block moisture, and the method may further comprise removing the releasable backing prior to placing the connector plate on the supporting surface causing the adhesive layer to adhere to the supporting surface. The sharp projections may be 5 mm in length from an attached proximal end to said top. The edge zones may comprise two laterally oriented edge zones and two longitudinally oriented edge zones. The sharp projections in said edge zones may be adapted to engage said floor covering units on a lateral axis and on a longitudinal axis. The sharp projections in said edge zones may be adapted to engage said floor covering units from a plurality of directions and wherein said sharp projections are adapted to prevent said floor covering units from moving along or away from a seam created by adjacent floor covering units. 
         [0026]    Additional features and advantages of the clip connector of the present invention will become more readily apparent from the following detailed description of the preferred embodiment thereof, when taken in conjunction with the drawings wherein like reference numerals refer to corresponding parts in the several views. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0027]    In order to facilitate a full understanding of the present invention, reference is now made to the accompanying drawings, in which like elements are referenced with like numerals. These drawings should not be construed as limiting the present invention, but are intended to be exemplary and for reference. 
           [0028]      FIG. 1  is a plan view of an embodiment of a clip connector of the present invention. 
           [0029]      FIG. 2  is a plan view of an embodiment the upstanding projections of a clip connector of the present invention. 
           [0030]      FIG. 3  is a cross-sectional view of an embodiment of a clip connector of the present invention. 
           [0031]      FIG. 4  is a detailed view of a cross-section of the upstanding projections of an embodiment of a clip connector of the present invention. 
           [0032]      FIG. 5A  is a plan view of another embodiment of a clip connector of the present invention. 
           [0033]      FIG. 5B  is a plan view of another embodiment of a clip connector of the present invention. 
           [0034]      FIG. 6  is a perspective view of the releasable silicone layer and pressure sensitive fiber tape in an embodiment of a clip connector of the present invention. 
           [0035]      FIG. 7  is a perspective view of an embodiment of a clip connector of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0036]    The present invention will now be described in more detail with reference to exemplary embodiments as shown in the accompanying drawings. While the present invention is described herein with reference to the exemplary embodiments, it should be understood that the present invention is not limited to such exemplary embodiments. Those possessing ordinary skill in the art and having access to the teachings herein will recognize additional implementations, modifications, and embodiments, as well as other applications for use of the invention, which are fully contemplated herein as within the scope of the present invention as disclosed and claimed herein, and with respect to which the present invention could be of significant utility. 
         [0037]    With reference to  FIG. 1  a plan view of an embodiment of a clip connector  100  of the present invention is provided. The clip connector  100  may comprise an electro-galvanized steel coil metal plate with an approximate thickness of 0.40 mm. The clip connector  100  may be 76 mm long and wide, and the central area  150  of the clip connector  100  may be 36 mm long and wide. The edge area of the clip connector  100  is divided into four sections  130 ,  132 ,  134 , and  136 , each section having a set of upstanding projections  110 , by score lines  140 . The score lines  140  also assist an installer in placing each modular floor covering unit to be joined by the clip connector  100  over approximately ¼ of the surface of the clip connector  100 . The clip connector  100  may be formed by a stamping process wherein the clip connector  100  is formed form a single piece of metal or other suitable material. The upstanding projections  110  and  120  are formed simultaneously with the plate of the clip connector  100  such that they are integrally attached when the clip connector  100  is formed by stamping. 
         [0038]    The upstanding projections  110  in section  134  are arranged into rows  112  and columns  114 . Each upstanding projection in the set of upstanding projections  110  may be 1.4 mm wide and 5 mm long from the proximal to the distal end. The length of each upstanding projection  110  is determined to be long enough to penetrate and secure a modular floor covering unit but not so long as to pierce entirely through the floor covering unit causing a hazard. The projections  110  extend upwards at an approximate 70 degree angle and the distance from the upper surface of the clip connector  110  to the distal end of any individual projection may be 4.7 mm. The distance from the proximal end of one upstanding projection to the distal end of another projection in the same row may be 7 mm. The distance from the distal end of one projection to the distal end of a projection in an adjacent, staggered row may be 6 mm. The distance between each projection in a column may be 5 mm. The distance from the last projection in the column closest to the top or bottom edge of the clip connector  100  may be 15 mm. The columns  114  of projections  110  are staggered, each column  114  closer to the center of the clip connector  110  having one fewer upstanding projection that the previous column. The upstanding projections  110  point inward on the lateral axis of the clip connector  110 , while the upstanding projections  120  point inward on the longitudinal axis of the clip connector  100 . The back side of the clip connector  100  may comprise a layer of pressure sensitive fiber tape of approximately 0.1 mm in thickness and a releasable silicone tape protective layer which may also serve as a moisture barrier. Additionally, the central area  150  may comprise a layer of adhesive such as butyl rubber tape or pressure sensitive fiber tape that may be covered by a releasable layer. This additional adhesive layer in the center area  150  may be used to further secure some types of modular flooring units. 
         [0039]    Prior to the installation of any clip connector  100  or floor covering unit, the subfloor or supporting surface may need to be prepared. Floors must be clean, dry and free of dirt, dust and oil. The installation site must be acclimated with HVAC in operation. The floor and room temperature, as well as flooring materials and adhesive, must be maintained at 65°-95° F., and the humidity below 65% for 48 hours prior to, during, and after the testing and installation. Substrates that have been chemically cleaned or when adhesive has been chemically removed, extra steps may need to be taken to ensure a proper installation. Where the subfloor is concrete, the concrete must be fully cured, free of moisture, sound, clean and meet industry standards as defined in American Concrete Institute Committee Report 302.1.04 R. New concrete requires a curing period of approximately 90 days. For old concrete, the concrete must be checked for moisture. Dry, dusty, porous floors must be primed or encapsulated. For a wood floor, the floor must be smooth and level. If the floor is uneven, an approved underlayment will be required. Old finishes must be tested for compatibility with adhesives or removed and porous wood primed. For terrazzo or marble floors, all grout lines must be leveled with an appropriate cement-based patch reinforced with polymers. For other hard surfaces, any floor tiles must be well secured to the floor or removed. Broken, damaged, or loose tiles must be replaced. 
         [0040]    For the installation of modular floor covering units using the clip connector  100 , the first floor covering unit is positioned adjacent to the adjoining floor covering unit so that ¼ of the clip connector  100  adheres to each of the adjacent floor covering units. In this manner, the clip connector spans the gap between the edge of one floor covering unit and the edge of the adjacent floor covering unit. A floor covering unit installed using the clip connector  100  may be assembled on an underlying flooring surface, a subfloor, without the need to attach the floor covering unit to the floor surface. If desired in a large area, the releasable silicone tape on the bottom of the clip connector  100  may be removed and the clip connector  100  may be adhered directly to the underlying flooring surface. This method of installation may be desired when a pattern is printed on the top of the floor covering unit. After a long run of modular flooring units are placed, an installer, without adhering the clip connector  100  to the flooring surface, may be slightly off of the pattern. Adhering the clip connector  100  to the floorings surface enables the installer to keep the rows of adjacent floor covering units in a straight line in a large area. If the releasable silicone backing is not removed, it will act as a moisture barrier against the underlying flooring surface (e.g., concrete). 
         [0041]    The upstanding projections  110  and  120  of the clip connector  100  penetrate the backing of a floor covering unit on two axes. The floor covering unit to be installed using the clip connector  100  is pressed on firmly with a thumb or a blunt tool to “start” the penetration process. A roller such as a three inch tractor roller may be used along the seam of the floor covering units to seat the floor covering units on to the clip connector  100 . This seating causes the upstanding projections  110  and  120  to be depressed downwards, from an initial angle of approximately 70 degrees to a final angle of approximately 15 degrees. Two or three taps on the floor covering unit with a rubber mallet or similar device pushes the floor covering unit flush with the plate of the clip connector  100  on two axes locking the floor covering unit in place. When four units are placed together, any force in any direction enable the floor covering units to stay in place. In this way the risk of failure is greatly diminished. In the installation process, an installer can easily pull the clip connector  100  out of the backing of the floor covering unit. If the majority of the upstanding projections  110  and  120  have not bent beyond a 45 degree angle from their original orientation, the clip connector  100  may be used again. If removed shortly after installation, the clip connector  100  may be reused to secure a replacement floor covering unit. However, if a replacement panel is needed months or years after installation, a new clip connector  100  would likely be needed as most if not all of the upstanding projections  110  and  120  would likely have bent beyond a 45 degree angle. The seventy degree angle of the upstanding projections  110  and  120  ensure that a person will not “feel” the projection through the floor covering unit. A floor covering installed using clip connectors  100  will dissipate forces throughout the entire floor covering instead of applying tension on a single clip connector  100  or seam. Using a non-adhesive method entirely eliminates adhesive failure and does not produce any fumes or harmful VOCs that would be present in complete glue down systems. In the prior art adhesive connector systems, during installation installers may still be required to use a spray adhesive for extra adhesion which may introduce fumes and VOC&#39;s into the installation environment. 
         [0042]    The floor covering units used in the installation may be installed in several different patterns. For a “monolithic” or grid like pattern, clip connector  100  would be installed only at the corners at the points of abutment between two or more floor covering units. For an offset pattern clip connectors  100  would need to be installed at each at the corner at the points of abutment between two or more floor covering units, which would require some clip connectors  100  to be installed at the lateral or longitudinal edges of some of the floor covering units. 
         [0043]    With reference now to  FIG. 2  a detailed plan view of an embodiment the upstanding projections  210  of a clip connector  200  of the present invention is provided. The detailed view of the upstanding projections  210  shows the projections  210  arranged in rows  212  and columns  214 . The upstanding projections  210  point inwards towards the center area  250  of the clip connector  200 . Each set of upstanding projections  210  comprises three columns of teeth if arranged longitudinally (e.g., upstanding projections  210 ), or three columns of teeth if arranged laterally (e.g., upstanding projections  220 ). Score lines  240  assist an installer in properly aligning floor covering units over the clip connector  210 . 
         [0044]    With reference now to  FIG. 3 , a cross-sectional view of an embodiment of a clip connector  300  of the present invention is provided. The bottom surface  360  of the clip connector  300  may comprise a fiber tape adhesive layer and a releasable silicon backing layer. The backing layer may be left in place to serve as a vapor barrier or may be removed to allow an installer to “tack” the clip connector  300  in place during the installation process. “Tacking” allows an installer to line up the clip connector  300  with other clip connectors to ensure straight lines of floor covering units in larger installation areas. Two sets of upstanding protrusions  330  and  334  are oriented to point inwardly on the lateral axis of the clip connector  300 , while the visible set of upstanding protrusions  336  points inwardly on the longitudinal axis. 
         [0045]    With reference now to  FIG. 4 , a detailed view of a cross-section of the upstanding projections  410  and  420  of an embodiment of a clip connector  400  of the present invention is provided. The upstanding projections  410  point inwardly towards the center of the clip connector  400  along the lateral axis of the connector. Each projection in the sets of upstanding projections  410  and  420  is raised at an approximate 70 degree angle towards the center of the clip connector  400 . Each upstanding projection may be 5 mm long and each distal end is raised approximately 4.7 mm from the upper surface of the clip connector  400 . The bottom surface  460  of the clip connector  400  may comprise a fiber tape adhesive layer and a releasable silicon backing layer. 
         [0046]    With reference now to  FIGS. 5A and 5B , embodiments of a circular clip connector  500  and a triangular clip connector  510  of the present invention are provided. The circular clip connector  500  may have a plurality of sets of upstanding protrusions  502  arranged zones or sections to point inwardly towards the center of the circular clip connector  500 . The triangular clip connector  510  may have a plurality of sets of upstanding protrusions  512  arranged zones or sections to point inwardly towards the center of the triangular clip connector  510 . The clip connector of the present invention may also be comprise any other shape to accommodate different types of floor covering units and floor covering unit installation patterns. The clip connector of the present invention may be shaped into hexagonal, octagonal, rectangular, or other geometrical configurations depending on the desired installation application. 
         [0047]    With reference now to  FIG. 6 , a perspective view of the releasable silicone layer  620  and pressure sensitive fiber tape  610  in an embodiment of a clip connector  600  of the present invention is provided. The releasable silicone layer  620  may serve as a vapor or moisture barrier for the clip connector  600  if the clip connector is not “tacked” onto a flooring surface using the fiber tape  610 . Also visible from this bottom perspective view are the openings left in the plate of the clip connector  600  after forming the upstanding projections that project upwards on the opposite side of the clip connector  600 . 
         [0048]    With reference now to  FIG. 7 , a perspective view of an embodiment of a clip connector  700  of the present invention is provided. The clip connector  700  comprises left lateral zone  730 , top zone  732 , right lateral zone  734 , and bottom zone  736 . Each of the zones  730 ,  732 ,  734 , and  736  comprise a set of upstanding protrusions arraigned in three rows or columns pointing inwards to the center of the clip connector  700 . The nail shape of the upstanding protrusions and the 70 degree angle of the protrusions can be seen clearly in this perspective. 
         [0049]    While the invention has been described by reference to certain preferred embodiments, it should be understood that numerous changes could be made within the spirit and scope of the inventive concept described. Also, the present invention is not to be limited in scope by the specific embodiments described herein. It is fully contemplated that other various embodiments of and modifications to the present invention, in addition to those described herein, will become apparent to those of ordinary skill in the art from the foregoing description and accompanying drawings. Thus, such other embodiments and modifications are intended to fall within the scope of the following appended claims. Further, although the present invention has been described herein in the context of particular embodiments and implementations and applications and in particular environments, those of ordinary skill in the art will appreciate that its usefulness is not limited thereto and that the present invention can be beneficially applied in any number of ways and environments for any number of purposes. Accordingly, the claims set forth below should be construed in view of the full breadth and spirit of the present invention as disclosed herein.