Coating apparatus – Work surface shields – masks or protectors – Work-attached
Reexamination Certificate
2001-09-20
2004-03-02
Lorengo, J. A. (Department: 1734)
Coating apparatus
Work surface shields, masks or protectors
Work-attached
C118S504000
Reexamination Certificate
active
06699327
ABSTRACT:
TECHNICAL FIELD
This invention relates to a door painting tool, and more particularly to an adjustable, portable, collapsible frame element to be fitted around the outline of a hung door, such that the door may be finished in place, and the tool defining the critical surface prevents any over spray. The use of this tool allows the doors to be finished after they have been hung and after other subcontractors have left, permitting a more rapid finishing of the doors because of less drying time and also reduces the possibility of damage subsequent to the finishing.
BACKGROUND OF THE INVENTION
Traditionally, when a large building is constructed, the doors are by and large uniform, and the finishing of the doors is relegated to a relatively small enclosed area set aside for this purpose. The disadvantages of the traditional method of finishing the doors are multi-fold, including the fact that a large number of doors are in a small space, therefore there is limited air circulation which greatly increases the drying time, increasing the time span for the second or subsequent coat, as well as delaying the time of hanging the door. Further, since the doors are hung during the time that other subcontractors are finishing their tasks, there is a far greater danger of damage to the door during the transport and hanging process, as well as the time remaining until the other subcontractors are finished with their work.
By hanging the doors before they are finished and finishing them following completion of the work by other subcontractors, the danger of damage to the door is minimized and the fact that the doors are finished in place without the presence of other subcontractors, means that the door finishing task itself can be done expeditiously. This finishing process is greatly aided through the use of the inventive tool disclosed herein, which allows the finisher to move rapidly from door to door with the tool without a great deal of additional prep. Because of the greater air circulation, the doors dry relatively quickly.
Prior art known to the applicant includes:
U.S. Pat. No. 4,445,563, granted to Meyerhoff on May 1, 1984, which discloses a window structure wherein the support structure is made variable in size by using telescopically nested angle members. A flexible sheet extends across the support structure to provide weather protection.
U.S. Pat. No. 5,306,861, granted to Amos et al on Apr. 26, 1994 discloses a flexible, temporary wall covering, including a flexible sheet which may be adhesively secured to a portable frame work.
U.S. Pat. No. 5,345,989, granted to Brophy on Sep. 13, 1994, discloses a dust guard mounting, wherein a temporary frame work having securement means for a sheet member is placed over an opening to prevent the passage of dust therethrough.
U.S. Pat. No. 5,924,469, granted to Whittemore on Jul. 20, 1999, discloses telescopically expanding poles used to secure a flexible sheet defining a protected area within a predefined space.
U.S. Pat. No. 5,927,038, granted to Goldberg et al on Jul. 27, 1999, discloses an expandable self-locking frame used for construction of temporary walls, and the frame comprises a plurality of longitudinally extensible studs running along the length of a pair of elongated tracks, allowing the size of the framework to be adjusted.
U.S. Pat. No. 6,209,615 B1, granted to Whittemore on Apr. 3, 2001, discloses the same material as found in U.S. Pat. No. 5,924,469.
SUMMARY OF THE INVENTION
The present invention described in greater detail hereinafter includes a method and apparatus for finishing doors once they are mounted into their framework, and includes a tool which is adjustable both in height and in width to a dimension which surrounds the door, and when in place, prevents over spray during the time the door is finished. Of course the frame and the hardware are masked, but the door requires no additional preparation prior to finishing, and since the door is usually physically separated from other doors being finished, the dry time is greatly enhanced over the prior closed room method of finishing a plurality of doors. Once the door has been given its coating, the tool is moved to the next door and the process is repeated. Although the door tool is adjustable to meet different size doors, most of the doors in any given building structure will be the same size so that the tool can be moved from door to door without even having to be adjusted. There is also a provision in the present apparatus for detachable feet and the possibility of detachable arms to support draping if such is felt necessary.
The door tool described herein is designed to be quickly and easily adjusted and/or collapsed so that it may be easily carried from job to job or from door to door.
The tool is best used when the other subcontractors have completed their tasks and the door finishing can be done in an essentially empty and clean building such that there is no impediment to moving the tool from door to door, and further, there is no possibility of extraneous dust and/or damage to the finished door.
REFERENCES:
patent: 2284012 (1942-05-01), Paca
patent: 4411219 (1983-10-01), Keith et al.
patent: 4445563 (1984-05-01), Meyeroff
patent: 4620503 (1986-11-01), Pullens
patent: 5306861 (1994-04-01), Amos et al.
patent: 5345989 (1994-09-01), Brophy
patent: 5462243 (1995-10-01), Hart et al.
patent: 5924469 (1999-07-01), Whittemore
patent: 5927038 (1999-07-01), Goldberg et al.
patent: 6209615 (2001-04-01), Whittemore
Jensen & Puntigam P.S.
Lazor Michelle A
Lorengo J. A.
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