EDITORIAL NOTE Application No. 2014100939 The description commences on page 2 AN IMPROVED TILE SPACER AND A METHOD OF LAYING TILES USING SAID TILE SPACER FIELD OF THE INVENTION [001] This invention relates to a tile spacer that assists in separating tiles as they are being horizontally laid on flooring, or vertical upon walls. More particularly this invention relates to a tile spacer which can be used with minimal skill to provide correctly spaced tiles with substantially lippage free configurations without causing any scratching or damage to the surface of the tiles being aligned during the tiling process. BACKGROUND ART DISCUSSION [002] The applicant as disclosed in an earlier PCT application PCT/AU2012/000556 provided a unique tile spacer that would enable those with very little tiling skills to be able to conveniently utilise the tile spacer without the requirement to be used in conjunction with any setting tool to position the tile spacer between adjacent laid tiles in order to establish the requisite uniformity and consistent grout line while at the same time position one tile against the other so that the aligned tile edges are level in order to avoid any lippage. [003] The tile spacer discussed in PCT Patent Application PCT/AU2012/000556 included a unique central detachable shaft which was divided into a lower portion with a substantially flat and/or linear configuration of thickness matching the required grout line to be established between adjacently laid tiles with an upper portion of the central detachable shaft including a threaded length. [004] The tile spacer further uniquely included a tile spacer head that had a threaded central bore so that the tile spacer head was adapted to be rotatable up and down the threaded length of the upper portion of the central detachable shaft such that when the tile spacer was being used in the laying of tiles the 2 lower portion of the central detachable shaft established the consistent grout line between adjacent laid tiles and the tile spacer head was then rotated down the threaded shaft of the upper portion of the central detachable shaft so that the tile spacer head can rest upon at least two adjacently laid tiles thereby providing levelling of the elevation between said adjacent tiles so as to eliminate or reduce lippage. [005] The applicant's earlier invention disclosed in PCT Patent Application PCT/AU2012/000556 was particularly advantageous in that through the unique use of the hollow barrel portion of the tile spacer head this cylindrically type inner spacing was then able to accommodate the linear arrangement of the stem but also provide a suitable contact area between adjacent tiles as it is rotated down into position so as to level one tile against an adjacently laid tile to avoid lippage. [006] While the use of the rotatable cylindrical tile spacer head in the applicant's earlier invention was an improvement over existing arrangements at that time, there was a significant shortfall in that as the barrel and/or cylindrically shaped tile spacer head was being rotated down upon the top of adjacently positioned tiles there was a degree of frictional engagement between the contacting peripheral circumferential bottom edge part of the tile spacer head engaging the tiles to which alignment was required. [007] This frictional heat could potentially react with the tile sealant leaving small circular marks on the tile where contact between the tile spacer head and tiles was being made. [008] As is to be expected there is a degree of tension and force required to align the tiles as the rotational contact between the tile spacer head and the tiles to be aligned is completed. [009] The problem is also exaggerated when adhesives used to fix the tiles in place use sand based filler as some of this sand in the adhesive may make its 3 way up through the joints where the rotational action of the cylindrical shape tile spacer head in contact with the tiles may also then have a scratching and grinding effect upon the tiles at that contact point between the barrel portion of the tile spacer and the adjacent tiles being aligned. [010] In order to partially address this problem the applicant originally disclosed in its earlier PCT Patent Application PCT/AU2012/000556 a "washer" which would be adapted to be placed between the end of the hollow barrel of the tile spacer head and the tiles. [011] As stated in the PCT specification an advantage of including a simple washer that would be placeable or fixed to the bottom circumferential peripheral edge of the barrel of the tile spacer head and the tiles being laid would be that as the tile spacer head is rotated and presses down the washer is also rotated down and being made of resilient plastic or rubber it was anticipated that it would not scratch the surface of the tile, particularly tiles such as stone and porcelain. [012] As stated by the PCT Examiner reviewing the applicant's earlier PCT application, the use of a washer, even one made of resilient plastic or rubber and either attaching it to the base of the barrel of the tile spacer head and/or at least placing it in between the tile and the barrel, in the opinion of the Examiner this was considered an obvious solution to the problem in that while the prior art "does not disclose a washer adapted to be placed between the end of the hollow barrel and the tiles such a refinement is considered to be obvious to a skilled addressee concerned with scuffing newly laid tiles". [013] Nonetheless while the use of a washer to be placed between the end of the hollow barrel of the tile spacer head and the tiles wherein the washer is configured to be rotated in unison with the tile spacer head as it presses down upon the tiles may have originally been considered a solution to the problems associated with scratching, grinding, tile sealant deterioration and/or scuffing of 4 newly laid tiles, in use these kinds of washers do not solve the relevant problems. [014] Even if resilient plastic and/or rubber is used as the washer, the rotating action of the washer being rotated in unison with the tile spacer head as it is threaded down the main detachable shaft of the tile spacer will see a degree of heat generation by the friction engagement between the rotating washer upon the tile surface. [015] As introduced above, the generation of the heat along with a general grinding action is disfiguring the surfaces of the tiles being aligned where contact is being made between the tile spacer head and the respective tiles. [016] Accordingly it is an object of this invention to provide an arrangement which will overcome the problems associated with scratching, grinding, sealant deterioration and/or scuffing effected upon newly laid tiles through the use of a tile spacer with a rotating barrel type head. [017] Further objects and advantages of the invention will become apparent from a complete reading of the specification. SUMMARY OF THE INVENTION [018] Accordingly in one form of the invention there is provided a tile spacer including: [019] a base plate adapted to be positioned on a bonding agent under the bottom of adjacent tiles to be laid; [020] a central detachable shaft stemming from said base plate including a lower portion with a configuration of thickness of a required grout line to be established between the adjacently laid tiles and an upper portion with a threaded length; 5 [021] a tile spacer head with a lower cylindrical shaped hollow barrel portion and an upper threaded portion wherein the tile spacer head is adapted to be rotatable up and down the threaded length of the upper portion of the central detachable shaft; [022] a plate wedge including a central orifice of comparable dimensions to the flat lower portion of the central detachable shaft, said disc wedge including a series of raised ribs/bars contactable with a distal peripheral bottom circumferential edge of the hollow barrel portion of the tile spacer head when in use; [023] such that when the tile spacer is used the lower portion of the central detachable shaft establishes a consistent level grout line between adjacent laid tiles and wherein the plate wedge is slottable into place by the orifice engagement with the flat portion of the detachable stem to be placeable between the two adjacently laid tiles and the distal peripheral bottom circumferential edge of the hollow portion of the tile spacer head such that when the hollow barrel portion is rotated downwards the rotational force is converted to a non-rotating push down force upon the plate wedge placed upon the adjacently laid tiles providing levelling of elevation between said adjacent laid tiles so as to eliminate or reduce lippage. [024] In preference the plate wedge is a disc wedge. [025] Advantageously as the disc wedge is non-rotating and substantially laterally fixed in place between what otherwise would have been the contact area between the tile spacer head and those tiles being aligned to reduce lippage, there is now a unique intermediate piece of the disc wedge which is able to translate that rotational force of the turning hollow barrel portion as it is threaded down the shaft into a non-rotating push down effect of the disc wedge directly on to the adjacent tiles to be aligned so as to reduce and/or eliminate lippage. 6 [026] Previously minimal touch point between that distal peripheral bottom circumferential edge of the hollow barrel with the tiles being aligned created a significant heat build up through the frictional contact. [027] Advantageously by introducing the disc wedge with its unique raised ribs, that heat generated during the rotation is now dispersed through the raised ribs of the disc wedge. [028] As the disc wedge itself is not rotating but pushing down as it is fixed in placed by its engagement of the central orifice slotted over the flat portion of the detachable shaft means that it is not contributing to any scratching, grinding and/or rotational heat build-up effect that would otherwise be expected using a conventional resilient rotational washer to which state of the art previously considered would be the solution to address this kind of problem associated with markings upon freshly laid tiles caused by a rotating tile spacer head. [029] Advantageously if some of the sand of the adhesive used does make its way up through the joints between the tiles, as contact between the tile spacer with the tiles being aligned is through the non-rotating disc wedge, there will be no observable grinding or scratching effect upon the tiles even if sand is present. [030] Advantageously while the raised bars will assist in transferring heat away and across the entire disc wedge rather than at or along a single point of contact, the raised bars also provide a channelling effect in that if any adhesive, grout or other material raises up through the tiles at the are being levelled, it can be directed through the channels of the raised bars rather than clogging up about the base of the detachable stem which could have the consequence of making it more difficult to detach the stem when it is required to be removed. [031] Advantageously as any raised adhesive has been channelled into the ridges between the raised ribs means that the collected debris can be 7 conveniently scraped off so as to allow the disc wedge to be used again as required. [032] In preference the central orifice includes an elongated slot matching the shape and dimensions of the lower flat portion of the detachable shaft. [033] In preference the slot includes a configured hole midway along the length of the slot with a diameter slightly larger than the threaded portion of the detachable shaft. [034] In preference the flat lower portion of the detachable shaft includes opposing side edges terminating in an apex and wherein the central slot distal ends of the orifice of the disc wedge include a corresponding apex. [035] An advantage of such an arrangement is that by terminating the opposing side edges of the flat lower portion of the detachable shaft with an apex and matching that configuration with the central slot appearing on the disc wedge provides for an improved type lateral fit between the disc wedge and the lower portion of the detachable shaft. [036] In preference the raised ribs are aligned at substantially right angles to the central slot and are configured on both sides of the disc wedge. [037] An advantage of having the raised ribs on both sides of the disc wedge is that it makes it easier to position the disc wedge in place during the tiling process. [038] A user applying the disc wedge will not need to orientate the disc wedge on one particular side or another in that as both sides include the raised ribs that will contribute the dissipation of heat to disperse it throughout the disc wedge so inadvertent mistakes in the use of the tile spacer can be eliminated. [039] In preference the base plate is of same dimensions and shape as the disc wedge. 8 [040] Advantageously by correlating the shape and dimensions of both the base plate and the disc wedge accentuates the levelling process in that there is an equal pull from both the top and the bottom, this equal pull from the top and the bottom due to the replication in shape and dimensions between the base plate and the disc wedge allows for appropriate levelling alignment between the edges of adjacently positioned tiles even when there needs to be a gradual inclination of the overall tile surface so as to provide a requisite sloping such as for drainage and the like. [041] As the base plate and the disc wedge for the most part have a replicated shape of comparable dimensions this means that floors can be sloped and tiles placed at an incline without creating different degrees of raised elevation between the edges of adjacently laid tiles in that no tension between these edges of the laid tiles are compromised and the tile space head is rotated down. [042] In preference the flat lower portion of the detachable stem includes an upper thicker portion away from the required grout line when in use. [043] An advantage of such an arrangement is that by slightly increasing the thickness of the upper portion of the flat lower portion of the detachable shaft provides improved integrity and rigidity to the tile spacer in that as is to be expected rotational movement as the tile spacer head is rotated down does put a degree of strain upon the central detachable shaft. [044] Inadvertent detachment of the shaft during the process of levelling and/or before curing would want to be avoided. [045] In order now to describe the invention in greater detail a series of preferred embodiments will be presented with the assistance of the following text and accompanying illustrations. [046] BRIEF DESCRIPTION OF THE DRAWINGS 9 [047] Figures 1 a, 1 b and 1 c show respectively a perspective view, top view and cross sectional view of a disc wedge section of the tile spacer in a preferred embodiment of the invention. [048] Figure 2 shows a perspective view of the base plate and detachable shaft of the tile spacer in a preferred embodiment of the invention. [049] Figures 3a and 3b illustrate perspective views looking down firstly at the top of the tile spacer head in the case of Figure 3a and looking upwards at the bottom part of the tile spacer head in Figure 3b. [050] Figure 4 shows a schematic representation of the tile spacer in use in a preferred embodiment of the invention. [051] DETAILED DESCRIPTION OF THE INVENTION [052] Figures 1 a, 1 b and 1 c show various representative views of the disc wedge (10) that includes a substantially flat shaped disc (12) which in the preferred embodiment shown provides an octagon shape which is of a comparable size and shape to the base plate (24) to be discussed in relation to Figure 2. [053] While in the preferred embodiment the peripheral edge (12) of the disc wedge (10) is an octagon shape this is not essential to the invention but what is significant in a preferred embodiment of the invention is that the disc wedge (10) and the base plate (24) replicate size and shape so as to allow correct alignment between adjacently laid tiles when the floor requires sloping, for example in a drainage situation. [054] With the disc wedge (10) and the base plate (24) replicated in shape and size there will be no compromise in the tension being applied and there will be accentuation in the leveling process with an equal pull from top and the bottom. 10 [055] The disc wedge (10) includes a series of raised ribs (14) on each side of the disc (10). [056] The raised ribs (14) are able to spread out any friction or heat created between the points of contact during the rotating downward movement of the tile spacer head (34) and to which will be explained in greater detail when referencing Figure 4 that rotational downward movement of the barrel portion (36) of the tile spacer head (34) is then translated to a non-rotating downward push of the disc wedge (10) upon adjacent tiles being laid. [057] The disc wedge (10) includes a central orifice (16) which includes a main elongated slot (17) which at the midway point includes a hole (18) and wherein the elongated slot (17) terminates at respective distal ends in an apex shape (20a) and (20b). [058] The orifice (16) for the most part matches the dimensions required in order to provide a reasonably non-rotating laterally fixed position of the disc wedge (10) when placed on the lower portion (29) of the detachable stem (22) of the tile spacer. The slot (17) corresponds to the thickness of the lower portion flat sections (29) and (31) of the detachable stem (22) and wherein the central hole (18) is of a comparable diameter to the threaded portion (26) of the detachable stem (22). [059] The flat portion (29) and (31) of the detachable stem (22) also includes the corresponding apex distal edges (32a) and (32b) which match the corresponding apex slots (20a) and (20b) on the disc wedge (10). [060] Referring to Figure 2 there is the main detachable stem (22) which has the upper threaded portion (26) and the lower flat portion shown generally as (28) which includes two parts, the lower portion (29) which is of a thickness which matches the required dimensions of the grout line between adjacent tiles to be laid and also a slightly thicker section (31) which improves the rigidity and 11 strength of the detachable stem when in use so as to not inadvertently become detached as the tile spacer head (34) is rotated down the detachable shaft (22). [061] The base plate (24) includes the octagon peripheral shape (25) which matches the peripheral octagon shape (12) of the disc wedge (10). [062] As introduced above, the lower portion (28) of the detachable stem (22) includes the apex edges (32a) and (32b) which match the corresponding apex slots (20a) and (20b) of the disc wedge (10). [063] Figures 3a and 3b show the third piece of the tile spacer in a preferred embodiment of the invention which has the tile spacer head (34) which for the most part includes the barrel portion (36) which has the hollow cavity or chamber (44) which will allow the tile spacer head to be rotated down the detachable shaft (22) with the distal peripheral bottom circumferential edge (43) of the barrel portion (36) adapted to make contact with the raised ribs (14) of the disc wedge (10) when in use. [064] The tile spacer head (34) also includes the upper portion including the bore hole (40) with the threads (42) which provide spacing (45) for the threaded section (26) of the detachable shaft (22) to be rotated there through as required. [065] Flanged shoulders (39a) and (39b) allow easy gripping and rotation of the tile space head (34) by the user. [066] Figure 4 shows schematically a method by which two adjacent tiles (50a) and (50b) can be laid using the tile spacer of the invention. [067] The thickness of the flat lower portion (29) of the detachable stem defines the grout line between the adjacent tiles (50a) and (50b). [068] In order to provide leveling of the elevation between the adjacently spaced tiles (50a) and (50b) so as to eliminate or reduce lippage the tile spacer 12 head (34) is rotated down the detachable shaft (22) shown by way of arrow (52). [069] Nonetheless rather than having this rotational action translated directly onto the tiles to be laid the introduction of the intermediate disc wedge (10) and by virtue that it is non-rotating through the fixed engagement of the configured orifice which matches the dimensions of the flat portion of the detachable stem (22) means that this rotational movement (52) is translated into a push down force shown by way of arrows (54). [070] In the embodiment shown as the base plate (24) matches the size and shape of the disc wedge (10) there is also an improved leveling action with a pulling effect also between the base plate (24) and the disc wedge (10). [071] Rather than having the distal peripheral bottom circumferential edge (43) of the barrel portion (36) of the tile space head (34) making minimal line of contact with the tiles being aligned thereby creating build up of heat causing potential tile degradation and/or further damage through scratching and grinding, the distal peripheral bottom circumferential edge (43) is rotating on the rotationally fixed disc wedge (10) and the raised ribs (14) so that any heat build up in the contact point between the distal peripheral bottom circumferential edge (43) is then shared and drawn across the entire disc wedge (10) by the raised ribs (14). 13