Book covers

Claim 1

A COVERING STRUCTURE FOR A BOOK, COMPRISING: (A) A UNITARY, GENERALLY-RECTANGULAR BODY HAVING A LONGITUDINAL AXIS AND A TRANSVERSE AXIS PERPENDICULAR TO SAID LONGITUDINAL AXIS; (B) SAID BODY HAVING EACH OF ITS CORNERS CUT OUT TO DEFINE A CUT-OUT EDGE OF ITS CORNERS CUT OUT TO LONGITUDINAL AXIS AND THENCE OUTWARDLY TOWARD THE TRANSVERSE SIDE EDGE OF SAID BODY, AND THEREAFTER FOLLOWING A FIRST STRAIGHT LINE INWARDLY TOWARD SAID LONGITUDINAL AXIS, A SECOND STRAIGHT LINE OUTWARDLY TOWARD SAID SIDE EDGE, A THIRD STRAIGHT LINE INWARDLY TOWARD SAID LONGITUDINAL AXIS AND FOURTH LINE OUTWARDLY TOWARD SAID EDGE; (C) A HOOK PORTION INTEGRALLY FORMED AT EACH OF THE CORNERS OF SAID BODY MEMBER ADJACENT THE POINT AT WHICH SAID FOURTH LINE APPROACHES SAID SIDE EDGE OF SAID BODY; (D) SAID HOOK PORTION CONTINUING AS AN EXTENSION OF SAID FOURTH LINE, AND, THEREAFTER, EXTENDING TRANSVERSELY OUTWARDLY, LONGITUDINALLY INWARDLY, AND TRANSVERSELY INWARDLY TO FORM A HOOK HAVING AT LEAST ABOUT 270 DEGREES OF CLOSURE; (E) SAID HOOK PORTION HAVING A PAIR OF TRANSVERSELY SPACED PERFORATIONS FORMED IN THE TRANSVERSE OUTWARD SECTION OF SAID HOOK PORTION; (F) SAID BODY PORTION HAVING A SECOND PAIR OF PERFORATIONS, TRANSVERSELY SPACED THE SAME DISTANCE AS THE SAID FIRST PAIR OF PERFORATIONS, FORMED THEREIN THE SAME DISTANCE FROM SAID LONGITUDINAL AXIS OF SAID BODY AS SAID FIRST PAIR OF PERFORATIONS; (G) SAID FIRST AND SECOND PERFORATIONS BEING LOCATED AND SPACED SUCH THAT, WHEN THE LONGITUDINAL FLAPS OF SAID BODY ARE FOLDED INWARDLY OVER THE LONGITUDINAL EDGES OF SAID BOOK AND THE TRANSVERSE FLAPS OF SAID BODY ARE FOLDED INWARDLY OVER THE TRANSVERSE EDGES OF SAID BOOK AND OVER SAID LONGITUDINAL FLAPS, MARKS MADE ON SAID LONGITUDINAL FLAPS BY A MARKER PASSING THROUGH SAID PERFORATIONS WILL DEFINE THE TERMINAL ENDS OF A PAIR OF PARALLEL, LONGITUDINAL SLITS THROUGH WHICH SAID HOOK PORTIONS CAN PASS IN HOOKING ENGAGEMENT WITH THE LONGITUDINALLY-FORMED, NARROW BAR BETWEEN SAID SLITS; (H) A FIRST GUIDE LINE FORMED ON SAID BODY CO-INCIDENT WITH THE CENTRAL TRANSVERSE AXIS OF SAID BODY; (I) A PLURALITY OF PAIRS OF SECOND GUIDE LINES FORMED ON SAID BODY AND EXTENDING OUTWARDLY FROM EACH SIDE OF SAID FIRST GUIDE LINE TOWARD THE LONGITUDINAL EDGES OF SAID BODY TO FORM ACUTE ANGLES WITH SAID FIRST GUIDE LINE; (J) SAID PAIRS OF SECOND GUIDE LINES BEING SPACED FROM POINTS ADJACENT THE ENDS OF SAID FIRST GUIDE LINE TO POINTS TRANSVERSELY SPACED APART A DISTANCE SUBSTANTIALLY LESS THAN THE HEIGHT OF THE SMALLEST BOOK TO BE COVERED AND GIVEN PAIRS OF SAID SECOND GUIDE LINES DEFINING PAIRS OF POINTS AT OPPOSITE CORNERS OF THE SPLINE OF SAID BOOK; (K) A PRESSURE-SENSITIVE ADHESIVE ON THE INTERIOR SURFACE OF SAID BODY ADJACENT EACH OF THE CORNERS OF SAID BODY MEMBER DEFINED BY SAID FOURTH LINE OF SAID CUT-OUT AND SAID TRANSVERSE SIDE EDGE OF SAID BODY; (L) A REMOVABLE, NON-ADHESIVE COVERING MOUNTED OVER SAID PRESSURE-SENSITIVE ADHESIVE; AND (M) SAID BODY BEING OF SUFFICIENT THIN AND PLIABLE PLASTIC MATERIAL THAT CUTTING ALONG SAID FIRST GUIDE LINE TO THE EDGES OF THE SPLINE OF A BOOK AND ALONG SAID GIVEN PAIR OF SECOND GUIDE LINES TO THE CORNERS OF SAID SPLINE AND, THEREAFTER, TUCKING THE TWO RESULTANT OUTWARDLY-FLARED TABS INTO THE SPACE BETWEEN SAID SPLINE AND THE BOUND BACK EDGES OF THE PASES OF SAID BOOK, IN A MANNER SUCH THAT SAID TABS OVERLAP ONE ANOTHER AT THE FIRST GUIDE LINE CUT, SAID TABS DO NOT INTERFERE WITH THE CLOSING OF SAID BOOK WHEN SO INSERTED.