Receptacles – Sidewall structure – Collapsible wall feature
Patent
1993-09-02
1995-04-18
Castellano, S.
Receptacles
Sidewall structure
Collapsible wall feature
220288, 220670, 220675, 215 1C, 215 113, 222215, B65D 144
Patent
active
054070937
DESCRIPTION:
BRIEF SUMMARY
This invention relates to container systems and in particular to two-part containers intended to be deformable.
In earlier patent specifications, British patent application No. 2,213,532 and British patent application No. 2,234,556 there is described a dispensing apparatus utilising a deformable container for containing semi-solid product to be dispensed from the container by deformation in the axial direction of the container. In order to fill such containers with product access is normally gained through the outlet opening. In some cases it is preferred to locate a block of pre-frozen product in the container which requires that the opening for admitting the block is of substantially the same dimensions as the cross-section of the container. At the same time the container should retain its deformation characteristics.
An object of the invention is to provide an improved deformable container.
According to the invention a container system comprises two flexible parts, a body part and a cap part, each part having an open end, the cap part being securable to the body part to form a cylindrical container assembly, the side walls of the body part and of the cap part being deformable in the longitudinal direction to reduce the internal volume of the assembly and the assembly having substantially constant external dimensions over the side walls of the body part and the cap part, the body part having thread means at least towards its open end in its side wall and the cap part having thread means towards its open end and in its side wall whereby the cap part and the body part may be secured to one another by interengagement of the thread means, one of the parts having an outlet opening through which the contents of the assembly may be discharged upon deformation of the container assembly.
Preferably the thread means of each part is arranged so that the outer pitch diameter of one of the parts decreases towards its open end and the inner pitch diameter of the other part increases towards its open end. By this arrangement it becomes easier and there is less resistance in threading the cap part onto the body part, full interengagement of the threads being achieved when the cap part is fully located on the body part. The facility of easy location on the body part is desirable because of the relatively large diameter of the container assembly which may otherwise give rise to excessive resistance to location of the cap part onto the body part. Alternatively the threaded interengagement may be by conventional constant diameter threads.
The arrangement of a threaded interconnection between the body part and the cap part ensures that the container assembly over the interengaging threaded region is Still able to be deformed in the axial direction. At the same time egress of the contents of the container through the connection is prevented. The thread form for interengagement may extend over two or more threads axially of the parts.
By this arrangement the body part may be filled with product in a block substantially the internal size of the body part. After insertion the cap part is located in threaded engagement with the body part to define a closed container substantially filled with product.
Conveniently the thread means on each of the body part and the cap part extends from the open end to adjacent the opposite end of the part. Moreover the thread form of the body part may be of constant diameter over that part of the body part not to be interengaged by the cap part.
Preferably the body part and the cap part are deformable by the closing up of the interengaged thread forms, and the body part is additionally deformable over its side walls not interengaged with the cap part. Conveniently the outlet opening is formed centrally in the end wall opposite said open end of the cap part or of the body part.
The container system may additionally comprise a deformable bag for location within the assembly and for containing product therein for discharge through said outlet opening, the bag having a discharge outlet opening for coop
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patent: 5002193 (1991-03-01), Touzani
patent: 5071034 (1991-12-01), Corbiere
patent: 5269428 (1993-12-01), Gilbert
patent: 5333761 (1994-08-01), Davis et al.
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