Receptacles – Closures – Removable closure retained by ductile in situ deformation
Patent
1987-04-15
1988-02-23
Hall, George T.
Receptacles
Closures
Removable closure retained by ductile in situ deformation
220257, 220366, B65D 3900
Patent
active
047264896
ABSTRACT:
A yogurt container and a cover therefor obtained from a sheet of thermo-plastics material, wherein said container comprises a hollow frusto-conical body, radiused to a flat edge by means of at least an annular step-like-projection and by means of a side wall portion, and wherein said cover being nestable in the container above said body comprises a peripheral wall and a central handgrip. The side wall portion is formed of an upper part downwardly frusto-conical and of a lower cylindrical part. A plurality of recesses are provided inside the container in the region where said cylindrtical part and said frusto-conical part join together, each recess being formed of a base and of an upwardly tapered wall and being a spacer between stacked empty containers. The elastically yieldable peripheral wall of the cover is upwardly substantially frusto-conical and can be radially pressed in- and/or outwardly by means of at least an annular channel provided between the said peripheral wall and the handgrip and by means of the cylindrical part of said wall portion of the container to improve considerably the tightness between the cover and the container and to withstand inwards bending of the side wall of the container. According to another embodiment the side wall portion of the container comprises a back draft part, a projection, a cylindrical part and a downwardly frusto-conical part, while in another embodiment the peripheral wall of the cover is downwardly frustoconical and in its upper part is provided with a small flange. For an easy removal of the cover the side wall of the handgrip is of a downwardly frusto-conical shape and/or is provided with downwardly frusto-conical flutes tapering towards the axis of the cover for facilitating axial drafts on the cover and/or for imparting torsional movements to the cover around the axis thereof.
REFERENCES:
patent: 2985354 (1961-05-01), Aldington
patent: 3344974 (1967-10-01), Bostrom
patent: 3391847 (1968-07-01), Christine et al.
patent: 4300700 (1981-11-01), Chang
patent: 4555043 (1985-11-01), Bernhardt
patent: 4679699 (1987-07-01), Malsbury et al.
Hall George T.
I.S.A.P. SpA (Industrie Specializzate Articoli Plastici)
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