Dispensing – Collapsible wall-type container – Nonmetallic
Patent
1981-07-20
1984-09-11
Rolla, Joseph J.
Dispensing
Collapsible wall-type container
Nonmetallic
222173, 222543, 222556, B65D 572, B65D 3508
Patent
active
044705212
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an improved form of paste dispenser and in particular it relates to containers of the type generally used for toothpaste or the like which comprise a distortable tubular elongated body having one end closed by a wall in which is a discharge aperture or nozzle which in some cases has to be pierced after removing a protective cap when it is desired to eject the contents of the container.
With the present type of device it is customary to form the container from a suitable mouldable or extrudable material, either metal or plastics, and to have at one end of the container a closure with a projecting screw-threaded mozzle, preferably with a thin pierceable sealing membrane across it, and to then screw on to the end of the threaded nozzle a cap which must be replaced each time that the tube is used, the tube being filled from the other end with the required amount of toothpaste, or other viscous or semi-viscous material, and being then sealed at that end by bending and crimping or welding the end of the tube, or by any other means, such a tube being shown for instance in the specification of United States Letters Patent to Yamada et al No. 4,261,482.
Certain problems exist in the forming of tubes in this way, particularly when plastics are involved, and it is usually necessary to form that end of the tube which contains the opening or discharge section, generally referred to herein as the head, separately from the tubular extension which holds the content and to then weld the tubular extension to the more solidly moulded head.
Apart from the difficulty of forming such tubes there are certain packaging difficulties in that one end of the tube, as well as the main extension of the tube, is of cylindrical form and because the end through which the contents are filled must be flattened to turn over the extreme end portion to effect a seal, or to weld the extreme end portion to seal the end of the tube, that end of the tube has considerably greater extension than the cylindrical part of the tube so that the space required during packaging at one end of the filled tube differs considerably to the space required at the other end of the filled tube. This effect is shown in the above referred to United States patent specification.
There is also the problem that with a removable cap there is the danger of the cap being misplaced, and while it has been proposed heretofore to form the discharge end of such tubes with a hinged cap or closure member, the protection of the contents has not necessarily been effective because the contents were not protected once the seal was broken and particularly if the cap was not replaced. See for instance the specification of United States Letters Patent to Robert M. Grosjean No. 3,595,441 and the specification of United States Letters Patent of Jerry D. Martin No. 4,232,721.
The object of the present invention is to provide a method of forming such a container and also to provide an improved container of this type which will be simpler to manufacture and to use and in which the content will be protected effectively against contamination during transit, or prior to use, and will be readily protectable after a seal or closure has been broken.
A further object is to achieve a shape which will be better for packaging than the present devices.
A still further object is to form the entire dispenser in a single moulding operation, preferably including the closure means for the discharge end of the tube as well as the sealing which protect the content during transport and storage to give maximum consumer protection.
The packaging improvement is achieved by having the head of the tube, that is the end from which discharge takes place, and the cap of a dimension such that approximately the same width of the tube exists at this end and the other end when it is sealed by closing the end of the tube after filling and sealing the closure, but for packaging convenience it is preferred to have the plane of the seal slightly angled in relation to the head at the other end, the hea
REFERENCES:
patent: 3595441 (1971-07-01), Grojean
patent: 3710989 (1973-01-01), Armour
patent: 4232721 (1980-11-01), Martin et al.
patent: 4261482 (1981-04-01), Yamada et al.
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Rolla Joseph J.
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