Lined containers for paint and the like

Claim 1

A disposable liquid-proof liner nestable closely within a rigid open-topped receptacle of predetermined shape and dimensions having a closed bottom and upstanding side walls terminating in an open upper rim, comprising a one-piece open-topped hollow, thermoplastic body having a closed circular bottom and a thin upstanding tubular side wall of external configuration and dimensions substantially matching those of the interior of a receptacle which it is to line, said thin side wall being capable of flexing into a desirable clinging skin-tight relationship with the interior of said receptable, said thin side wall having stiffness rendering it self-sustaining against tendencies to collapse, said stiffness promoted by several peripherally-spaced venting and stiffening ribs extending substantially vertically and being indented inwardly from said side wall toward the liner interior to form open channels running fully from the bottom of said body to an upper peripheral rim of said body on the exterior thereof, said peripheral rim being substantially annular and somewhat flexible and several times the thickness of said thin side walls to contribute peripheral stiffness to said body and extending outwardly to overlie the upper enlarged receptacle rim, and said peripheral rim having a plurality of indentations protruding inwardly just below the level of the receptacle rim when the body and receptacle are fully mated, said indentations being proportioned to frictionally engage the receptacle rim and thereby hold the body in fixed relationship to a receptacle which it lines.