Brushing – scrubbing – and general cleaning – Implements – Bladed spreader
Reexamination Certificate
1999-02-02
2001-10-30
Spisich, Mark (Department: 1744)
Brushing, scrubbing, and general cleaning
Implements
Bladed spreader
C015S235600, C015S235800, C015S236080
Reexamination Certificate
active
06308370
ABSTRACT:
This invention relates to improvements in adhesive spreaders, and particularly to spreaders used to apply adhesive for tiles and in particular ceramic tiles.
BACKGROUND OF THE INVENTION
Tiles are typically laid on a clean prepared supporting surface by spreading adhesive over that surface with a trowel or alternatively a flat elongate sheet having serrations along a spreading edge. A skilled tradesperson will apply sufficient adhesive over the required area as well as attempt to provide an even height of adhesive so that the tile is evenly supported and becomes securely fixed as the adhesive hardens.
Too thin a coverage of adhesive (caused by the spreader being angled forwards or backwards) may result in adjacent tiles having different heights which may then be dangerous to walk upon and which may lead to breakage of the edges of the higher tile. Furthermore, uneven support of a tile can lead to tile breakages at the boundary between the adequate support and the inadequate support beneath the tile.
Tradespersons sometimes lay tiles with a predetermined slope which can be skilfully created by sloping the upper surface of the adhesive (by progressively leaning the spreader forward or backwards) over an otherwise level supporting surface, and then laying each tile with the required slope. This requires great dexterity, judgement and trade skill.
Furthermore, the spreading of adhesive over large areas also requires great skill and consistency so that the previously mentioned problems are not created.
The present invention will result in the reduction or elimination of the problems of inconsistently applied skills and provide a useful tool for use by tilers who may then be in a position to better apply other skills associated with the laying of tiles.
BRIEF DESCRIPTION OF THE INVENTION
A broad aspect of the invention for an adhesive spreader tool for spreading tile adhesive over an underlaying floor surface comprising:
a rectangular planar portion forming a rear wall having a plurality of indentations along a lower longitudinal edge,
a pair of opposing side walls extending substantially at right angles from rear wall,
wherein said flanges provide a sideways barrier for a mass of adhesive lying in front of said rear wall such that as the spreader tool and adhesive is drawn across said floor surface a supply of adhesive is spread over said surface as it flows through said indentations providing an application of adhesive across the full width of the spreader tool.
The flanges may be used while abutting a straight edge so as to guide the spreader tool across an area to be laid with tiles. Preferably the spreader is at least a single tile width but may be of a multiple tile width so that a line of tiles may be laid over the area of prepared adhesive.
In a further aspect of the invention an adhesive spreader in accordance with the broad aspect described above is provided with a height adjuster means comprising:
a gauge surface adjustable up and down the height of at least one of said flanges such that when said gauge surface is located on a guide located adjacent said floor surface to be tiled said spread adhesive has a maximum height which is a predetermined distance from said gauge surface.
Specific embodiments of the invention and methods of its use will now be described in some further detail with reference to and as illustrated in the accompanying figures. These embodiments are illustrative, and not meant to be restrictive of the scope of the invention. Suggestions and descriptions of other embodiments may be included, but they may not be illustrated in the accompanying figures, or alternatively features of the embodiments may be included in the figures but not described in the specification.
REFERENCES:
patent: 2008952 (1935-07-01), Gach
patent: 2081735 (1937-05-01), Caronia
patent: 2806240 (1957-09-01), Cottar
patent: 2913753 (1959-11-01), Peterson
patent: 3119138 (1964-01-01), Davis
patent: 4080684 (1978-03-01), Venditti
patent: 5379479 (1995-01-01), Nelson
patent: 5606763 (1997-03-01), South et al.
patent: 5778482 (1998-07-01), Sbrigato
patent: 1577936 (1980-10-01), None
Brown Martin Haller & McClain LLP
Southby Roydon Charles
Spisich Mark
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