Invention Grant
US08413356B2 Canvas stretching system with reusable corner clamps 失效
帆布拉伸系统,可重复使用的角夹

Canvas stretching system with reusable corner clamps
Abstract:
A canvas or material stretching system designed to allow a professional or amateur user to stretch a canvas or material on a frame without the use of stretching pliers and staples, both of which require considerable skill and strength. Special purpose corner clamps are temporarily used to secure the stretcher bars into an initial open miter frame. The purpose of this is to orient the double sided adhesive strip on the side of the stretchers towards the canvas or material while maintaining the adhesive strip from touching the canvas or material. Once alignment is achieved, the stretching bars are pressed down and attached onto the canvas or material and the corners are released. The corner clamps are removed and canvas or material corners are cut and folded into the open miter ends which also have adhesive strips. By rotating the stretchers axially 90 degrees into the final frame, thus closing the miters, and upon inserting U-shaped fasteners into grooves placed on the back of the stretcher the canvas or material is stretched and ready to display.
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