Holder for detachable blade

Claim 1

A HOLDER CAPABLE OF RIGIDLY SUPPORTING A RELATIVELY THIN FLAT ELONGATED BLADE HAVING SPACED OPPOSITE UPPER AND LOWER LONGITUDINAL EDGE PORTIONS, AT LEAST ONE OF WHICH TERMINATES IN A SHARPENED CUTTING EDGE, SAID BLADE ALSO HAVING AN INNER FACE AND AN OUTER FACE SAID HOLDER COMPRISING (1) A BASE MEMBER WHICH COMPRISES A GENERALLY FLAT SURFACE WITH A FIRST LONGITUDINAL EDGE FORMING A FIRST SHOULDER MEANS AND A SECOND LONGITUDINAL EDGE, SAID BASE MEMBER ALSO HAVING POSITIONED ALONG SAID SECOND LONGITUDINAL EDGE AN ELONGATED STEP OF RECTANGULAR CROSS-SECTION WITH AN OUTER LONGITUDINAL EDGE FORMING A SECOND SHOULDER MEANS, THE PLANE BETWEEN SAID FIRST SHOULDER MEANS AND SAID SECOND SHOULDER MEANS FORMING AN ACUTE ANGLE WITH THE GENERALLY FLAT SURFACE OF SAID BASE MEMBER SAID FIRST AND SECOND SHOULDER MEANS EACH HAVING A LENGTH AT LEAST AS GREAT AS SAID BLADE AND BEING SPACED APART A DISTANCE SLIGHTLY LESS THAN THE DISTANCE BETWEEN THE OPPOSITE LONGITUDINAL EDGE PORTIONS OF SAID BLADE, SAID HOLDER BEING ADAPTED TO RECEIVE SAID BLADE IN AN OPERATIVE POSITION ON SAID BASE MEMBER WHEREIN THE INNER FACE OF SAID BLADE ABUTS BOTH SAID FIRST AND SECOND SHOULDER MEANS ALONG THE FULL LENGTH OF SAID INNER FACE (2) AN ELONGATED CLAMP MEMBER HAVING A GENERALLY FLAT SURFACE DISPOSED IN FACING RELATION WITH SAID FIRST AND SECOND SHOULDER MEANS, SAID CLAMP MEMBER HAVING AT LEAST A MIDDLE PORTION THEREOF NORMALLY BOWED TOWARD SAID SHOULDER MEANS, SAID CLAMP MEMBER SURFACE HAVING A LENGTH AT LEAST AS GREAT AS SAID BLADE AND A WIDTH AT LEAST AS GREAT AS THE DISTANCE BETWEEN SAID SHOULDER MEANS, AND (3) MEANS CONNECTING THE END PORTIONS OF SAID CLAMP MEMBER TO SAID BASE MEMBER IN A MANNER TO DEFORM SAID CLAMP MEMBER SURFACE INTO CONTACT WITH THE OUTER SURFACE OF SAID BLADE AND INTO SUBSTANTIAL PARALLELISM WITH SAID SHOULDER MEANS, SAID HOLDER THUS BEING ADAPTED TO HOLD SAID BLADE IN SAID OPERATIVE POSITION SECURELY CLAMPED BETWEEN SAID CLAMP MEMBER AND BOTH OF SAID SHOULDER MEANS WITH THE CUTTING EDGE OF SAID BLADE EXPOSED ADJACENT SAID FIRST SHOULDER MEANS.