Tub-shower backwall and sidewall panel interlock

DETAILED DESCRIPTION We claim: 1.
A molded backwall panel and a molded sidewall panel for assembly with a bathtub in the forming of a shower enclosure, the panels having interlockable portions integrally molded respectively thereon whereby the sidewall panel can be assembled with the backwall panel to enclose a space and provide firm engagement between the panels by the interengaging of said interlockable portions with each other, the interlockable portions including pocket portions disposed on one of the panels and each being open on a vertical inner side adjacent the enclosed space of a completed enclosure and also at a top of said pocket portion, and outwardly extending dowel portions on the other of the panels, the dowel portions being engageable respectively in the pocket portions upon relative vertical movement between the panels.
2.
Panels as claimed in claim 1 wherein the pocket portions are on the backwall panel and the outwardly extending dowel portions are on the sidewall panel, the dowel portions being engageable respectively in the pocket portions upon downward movement of the sidewall panel.
3.
Panels as claimed in claim 1 wherein the interlockable portions also include a vertically extending groove in one of the panels and a vertically extending tongue portion on the other of the panels, the tongue portion being disposed in the groove when the panels are interlocked.
4.
A molded backwall panel and a molded sidewall panel for assembly with a bathtub in the forming of a shower enclosure, the panels having a pair of dowel-and-pocket connections therebetween for jamming a first pair of mating surfaces into firm engagement with each other and also a tongue-and-groove connection therebetween with means on a tongue portion of the tongue-and-groove connection for jamming a second pair of mating surfaces into firm engagement with each other, the second pair of mating surfaces extending at right angles to the first pair.
5.
Panels as claimed in claim 4 wherein the means on the tongue portion comprises spaced ridges