Package making – With contents treating – Reshaping
Patent
1996-12-04
1998-09-08
Moon, Daniel
Package making
With contents treating
Reshaping
531342, 53540, 53527, 53529, B65B 122
Patent
active
058028200
DESCRIPTION:
BRIEF SUMMARY
This application is the national phase of international application PCT/IT96/00064 filed Apr. 2, 1996 which designated the U.S.
TECHNICAL FIELD
The present invention relates to an apparatus by means of which to obtain the uniform distribution of a cohesionless substance contained within a bag presenting a useful internal volume of variable geometry compassed between a bottom end and a closured top end.
Such an apparatus is especially of service in machines for the manufacture of filter bags containing a substance with which to prepare an infusion, typically tea or herbal powders, and in particular, bags with a closure fashioned in such a way as to avoid glued or heat-sealed parts dictating the presence of a layer of adhesive that could occasion the migration of undesirable elements when the bag is immersed in a hot liquid to prepare the infusion.
BACKGROUND ART
Because bags of the type in question exhibit an overall shape of essentially non-homogeneous character, however, the substance encounters resistances to free flow internally of the useful internal volume of the bag that will vary from one part of the bag to another, causing localized accumulations of the substance which tend to favored certain areas at the expense of other more inaccessible areas.
It follows from the foregoing that the dimensions of a filter bag filled with cohesionless substances of the type being discussed will appear enlarged in certain typical areas, and that a finished pack can therefore be unreasonably penalized in terms of size: this is especially true in the conventional double folded type of bag, since the effects of a non-uniform distribution are produced twice over.
This drawback reflects just one aspect of the problems affecting industrial manufacture generally, not the least of which is the current need to bring about increasingly severe reductions in the quantity of materials used for packaging and wrapping consumer products, to the end of limiting their impact on the environment and saving the energy resources employed in disposing of such materials as waste.
Notwithstanding the fact that machines of more recent embodiment have been designed to perform operations such as will enable the infusionable substance to distribute itself in as uniform a manner as possible internally of the bags, a certain degree of irregularity in distribution is inevitable and will be more evident especially when bags are assembled and packaged in a significant number, so that the dimensions of the finished packs tend still to be somewhat considerable.
SUMMARY OF THE INVENTION
The object of the invention, is to overcome the drawbacks in question by providing an apparatus such as will bring about the uniform distribution of a cohesionless substance contained internally of a bag presenting a useful internal volume of variable geometry.
The stated object is realized in an apparatus comprising a rotor that provides at least one pocket, proportioned to accommodate a single bag, of which the surface supporting the bag is disposed substantially tangential to the rotor and delimited by transversely disposed walls. The rotor can be indexed through a given angular distance, from a position in which a bag is transferred into the pocket, to a knockout position in which the bag is ejected from the pocket, in such a way that the closured top of the bag locates against the corresponding transverse wall as the movement of the rotor is interrupted at the latter position, and the substance within the bag is caused forcibly to shift from the bottom toward the closured top.
The apparatus according to the invention is therefore able to overcome the problem inherent in obtaining a uniform distribution of the substance within the bag, this being a fundamental prerequisite if the dimensions of finished packs are to be contained.
In practice, the solution disclosed offers the facility of controlling the movement of the rotor in such a way that the substance will be subjected to forces of inertia of an intensity best able to bring about the uniform distribut
REFERENCES:
patent: 3812643 (1974-05-01), Vergobbi
patent: 4288224 (1981-09-01), Romagnoli
patent: 4382355 (1983-05-01), Romagnoli
patent: 5060450 (1991-10-01), Greenwell et al.
patent: 5331790 (1994-07-01), Benner, Jr. et al.
I.M.A. - Industria Macchine Automatiche - S.p.A.
Moon Daniel
Paradiso John
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