Shower door construction

Claim 1

IN A SHOWER ENCLOSURE PANEL A FRAMING CONSTUCTION FOR A PLASTIC SHEET SECURED ALONG ITS MARGINAL EDGES TO THE FRAMING CONSTRUCTION, SAID FRAMING CONSTRUCTION INCLUDING A GENERALLY RECTANGULAR FRAME, SAID FRAME BEING OF HOLLOW CORE FORMATION AND INCLUDING AN INTEGRAL OPEN CHANNEL DEFINED BY PARALLEL INNER AND OUTER WALLS ON EACH SIDE THEREOF, SAID CHANNEL BEING DISPOSED ADJACENT AN INNER MARGINAL EDGE OF SAID CORE; AN INTEGRAL LONGITUDINAL RIB EXTENDING INWARDLY OF SAID CHANNEL FROM ONE OF SAID WALLS; SPLINE MEANS ANCHORING SAID SHEET WITH RESPECT TO AT LEAST TWO SURFACES OF SAID CHANNEL, SAID SPLINE MEANS COMPRISING GENERALLY PARALLEL JAW-LIKE ELEMENTS INCLUDING LONGITUDINALLY EXTENDING OFF-SET PORTIONS CO-EXTENDIVE THEREWITH AND ADJACENT TERMINAL EDGES OF SAID JAW-LIKE ELEMENTS, SAID OFF-SET PORTIONS AND SAID JAW-LIKE ELEMENTS BEING RESILIENTLY DEFORMABLE WHEREBY UPON INSTALLATION IN SAID CHANNEL SAID JAW-LIKE ELEMENTS WILL BE COMPRESSED TOWARD ONE ANOTHER; A FIRST ONE OF SAID OFF-SET PORTIONS ADJACENT A TERMINAL EDGE OF ONE OF SAID JAW-LIKE ELEMENTS ENGAGING AND BEING RESILEINTLY BIASED INTO ANCHORING RELATION WITHIN SAID OPEN CHANNEL FOR COOPERATION WITH SAID LONGITUDINAL RIB IN KEYING RELATION THEREWITH TO OBVIATE INADVERTENT DISLODGEMENT OF SAID SPLINE FROM SAID CHANNEL; A SECOND ONE OF SAID OFFSET PORTIONS ADJACENT A TERMINAL EDGE OF ONE OF SAID JAW-LIKE ELEMENTS EXTENDING TOWARD THE SAID FIRST ONE OF SAID JKAW-LIKE ELEMENTS TO LIMIT RELATIVE LATERAL MOVEMENT OF FREE ENDS OF SAID JAW-LIKE ELEMENTS TOWARD EACH OTHER; WHEREBY PORTIONS OF SAID PLASTIC SHEET OVERLYING SAID TWO SURFACES OF SAID CHANNEL WILL BE SECURELY LOCKED BY SAID SPLINE MEANS TO PREVENT DISPLACEMENT OF SAID SHEET FROM SAID FRAME CONSTRUCTION.