Seam plate, for retaining roof decking membranes, having means for preventing interlocking of adjacent plates

A seam plate for securing a membrane sheet to an underlying substructure, comprising:

• a plate having the form of a disk;
• an aperture defined within a central portion of said disk for receiving a fastener for securing said plate to an underlying substructure;
• a plurality of projections having first predetermined profile dimensions, formed from said disk as a result of material being partially severed from said disk, and extending downwardly from an undersurface portion of said disk for engaging a membrane sheet so as to effectively secure the membrane sheet to the underlying substructure when said disk is fixedly secured to the underlying substructure by the fastener;
• a plurality of residual apertures, having second predetermined profile dimensions substantially matching said first predetermined profile dimensions of said plurality of projections, being defined within said disk at those locations at which the material, used to form said plurality of projections, was partially severed from said disk;
• and
• means for altering said first predetermined profile dimensions of said plurality of projections such that said plurality of projections, disposed upon said seam plate, cannot respectively enter, and become interlocked with, a plurality of residual apertures which are defined within an other seam plate, which is substantially similar to said seam plate, and which have profile dimensions corresponding to said second predetermined profile dimensions of said plurality of residual apertures defined within said seam plate.

A seam plate for securing a membrane sheet to an underlying substructure, comprising:

• a plate having the form of a disk;
• an aperture defined within a central portion of said disk for receiving a fastener for securing said plate to an underlying substructure;
• a plurality of projections having first predetermined profile and depth dimensions, formed from said disk as a result of material being partially severed from said disk, and extending downwardly from an undersurface portion of said disk for engaging a membrane sheet so as to effectively secure the membrane sheet to the underlying substructure when said disk is fixedly secured to the underlying substructure by the fastener;
• a plurality of residual apertures, having second predetermined profile dimensions substantially matching said first predetermined profile dimensions of said plurality of projections, being defined within said disk at those locations at which the material, used to form said plurality of projections, was partially severed from said disk;
• and
• means, disposed upon, and extending upwardly from, upper surface portions of said disk and having second predetermined depth dimensions which are greater than said first predetermined depth dimensions of said plurality of projections, for spacing an undersurface portion of an other seam plate, which is similar to said seam plate, away from said seam plate to a predetermined degree such that a plurality of projections, disposed upon the other seam plate and having profile and depth dimensions which correspond to said first predetermined profile and depth dimensions of said plurality of projections disposed upon said seam plate, cannot respectively enter, and become interlocked with, said plurality of residual apertures defined within said seam plate.

A seam plate for securing a membrane sheet to an underlying substructure, comprising:

• a plate having the form of a disk;
• an aperture defined within a central portion of said disk for receiving a fastener for securing said plate to an underlying substructure;
• a plurality of projections having first predetermined profile dimensions, formed from said disk as a result of material being partially severed from said disk, and extending downwardly from an undersurface portion of said disk for engaging a membrane sheet so as to effectively secure the membrane sheet to the underlying substructure when said disk is fixedly secured to the underlying substructure by the fastener;
• a plurality of residual apertures, having second predetermined profile dimensions substantially matching said first predetermined profile dimensions of said plurality of projections, being defined within said disk at those locations at which the material, used to form said plurality of projections, was partially severed from said disk;
• and
• means defined upon said seam plate for preventing said plurality of projections, disposed upon said seam plate, from respectively entering and becoming interlocked with a plurality of residual apertures, which are defined within an other seam plate, which is similar to said seam plate, and which have profile dimensions corresponding to said second predetermined profile dimensions of said plurality of residual apertures defined within said seam plate, and for preventing a plurality of projections, which are disposed upon the other seam plate and which have profile dimensions corresponding to said first predetermined profile dimensions of said plurality of projections disposed upon said seam plate, from respectively entering and becoming interlocked with said plurality of residual apertures which are defined within said seam plate.