Patent Application
20100065719
A flexible mud pan, or trough, such as constructed from a natural or composite structurally supporting material, and which exhibits sufficient structural rigidity for holding a volume of a viscous and settable material. The flexible material construction permits, upon the setting and drying of remnants of the settable material which are not applied, the pan to be collapsed or otherwise twisted, thus resulting in the flaked remnants being forcibly disengaged from the flexible surfaces of the pan.
The existence of mudding pans or troughs is well known in the prior art, these being tools of the trade used by individuals engaged in applying drywall mud or joint compound material, such as to seams associated with aligning drywall (i.e. wallboard) sheets. Such existing of mud pans typically exhibit a three dimensional and open interior trough configuration for holding a specified volume of a viscous/flowable mudding compound.
Upon completion of a mudding application, care must be taken to quickly rinse and clean off the unused remnants, such as with water and a rag, and before the same has had an opportunity to set/dry. Failure to do so results in a dramatically greater effort which will then be required in removing the set and crusted compound. Alternatively, the pan may be ruined and must then be disposed of.
The present invention discloses a flexible pan (or trough), and such as which is constructed from a flexible yet structurally supporting natural or composite flexible material, such as further exhibiting memory characteristics for returning to an original molded shape and following the material being deflected or otherwise manipulated. The material further preferably exhibits a Durometer rating of typically less than 100.
In another preferred variant, the flexible and structurally supporting material can further include such as a memory retaining material (such as including without limitation a polyurethane as well as neoprene or sanoprene), and which exhibits sufficient structural rigidity for holding a volume of a viscous and dryable/settable compound material, such as most typically a joint compound. The material construction is such that it permits a remnant (i.e. non-applied) portion of the joint compound to be allowed to set/dry upon the surfaces of the three dimensionally configured pan and, following that, the pan to be collapsed or otherwise folded or torsionally twisted, thus resulting in the flaked remnants being forcibly disengaged from the flexible surfaces of the pan.
Additional features associated with the present design include a plurality of removably secured and lengthwise/crosswise interconnecting extending supports, these being engaged underneath an upper perimeter edge defined lip in the tray and collectively defining a supported contact ledge associated with the upper and lip edge extending perimeter. In this fashion, the ledge provides an angled surface to the user and from which it is desirable to trim or otherwise reshape a portion of the mud/compound retrieved by the applying blade, this prior to applying to the wallboard surface or seam.
Reference will flow be made to the attached drawings, when read in combination with the following detailed description, wherein like reference numerals refer to lice parts throughout the several views, and in which:
Referring now to
As previously described, the present invention discloses a flexible mud pan (or trough), and such as which is constructed from a flexible yet structurally supporting natural or composite material having memory retention properties and with a Durometer rating of less than 100. In one non-limiting preferred application, the memory retaining material can include a durable foam (such as including without limitation any type of polymeric or polyurethane material, further including without limitation a neoprene or sanoprene) material, and which exhibits sufficient structural rigidity for holding a volume of a viscous and settable/curable material (e.g. such as a joint compound).
The structurally supporting material construction permits a remnant of the viscous settable material/joint compound to be allowed to set/dry within the pan and, following that, the pan to be collapsed or otherwise folded or torsionally twisted, thus resulting in the flaked remnants being forcibly disengaged from the flexibly displacing surfaces of the pan.
Durometer hardness, like many other hardness tests, measures the depth of an indentation in the material created by a given force on a standardized presser foot. This depth is dependent on the hardness of the material, its viscoelastic properties, the shape of the presser foot, and the duration of the test. ASTM D2240 durometers allows for a measurement of the initial hardness, or the indentation hardness after a given period of time. The basic test requires applying the force in a consistent manner, without shock measuring the hardness (depth of the indentation). If a timed hardness is desired, force is applied for the required time and then read. The material under test should be a minimum of 6.4 nm (0.25 inch) thick. The final value of the hardness depends on the depth of the indenter's penetration. If the indenter penetrates 2.5 mm or more into the material, the durometer is 0 for that scale. If it does not penetrate at all, then the durometer is 100 for that scale. It is for this reason that multiple scales exist. Durometer is a dimensionless quantity, and there is no simple relationship between a material's durometer in one scale, and its durometer in any other scale, or by any other hardness test.
As is also known, candidate materials such as Neoprene or polychloroprene belong to a family of synthetic rubbers that are produced by polymerization of chloreprene. Such materials are known for use in a wide variety of other environments, such as in wetsuits, laptop sleeves, electrical insulation, and car fan belts. Neoprene is the DuPont Performance Elastomers trade name. Other memory/structurally retaining foam materials are further made from polyurethane with additional chemicals that increase its viscosity level, thereby increasing its density. It is envisioned and understood that the tray or pan construction according to the present inventions can be constructed from any of a plurality of different, or selectively intermixed, materials so as to exhibit the necessary properties of structural supporting stability, such as when filled with a volume of a joint compound, as well as the ability to be collapsed or otherwise forcibly displaced and subsequently returned to its original shape.
Referring further to
The supports each correspond in overall length to a given side or interconnecting end dimension such that, upon assembly, each are engaged underneath a fold 32 (see
The supports 24-30 are further each constructed of a rigid material not limited to a durable aluminum, nylon, or other synthetic material and such that, in use, the supports are engaged underneath the fold 32 in the upper perimeter edge defined lip 22. The supports are installed to collectively define a supported contact ledge associated with the upper and lip edge extending perimeter. In this fashion, the ledge provides an angled surface to the user and from which it is desirable to trim or otherwise reshape a portion of the mud/compound retrieved by the applying blade (not shape), this such as prior to applying the compound to the wallboard surface or seam.
Finally, and referring to
It is also understood that the mud pan 10 can operate without any rigid inserts or supports. In this fashion, novel mud pan design can be left after use to allow any remaining volume of unapplied joint compound to set and dry, following which the resultant flaked remnants can be quickly and effectively removed, without the need of scraping and/or the use of water or other fluid based cleaning solutions. It is also understood that the degree of structural rigidity associated with the memory foam structure can be manipulated or otherwise modified, based upon the load carrying requirements of the associated joint compound.
Having described my invention, other and additional preferred embodiments will become apparent to those skilled in the art to which it pertains, and without deviating from the scope of the appended claims.
