Manufacturing container or tube from paper; or other manufacturi – With extruding – drawing – or attenuating – Method
Patent
1988-02-19
1989-02-07
Ball, Michael W.
Manufacturing container or tube from paper; or other manufacturi
With extruding, drawing, or attenuating
Method
206440, 493394, 493395, 493406, 493458, 493960, 604358, B65B 6304
Patent
active
048028843
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method of folding into packages, in connection with the manufacture thereof, disposable absorbent articles such as diapers, incontinence protectors or the like comprising an absorbent body enclosed in a casing which extends laterally beyond the absorbent body and which has casing portions intended to seal around the abdomen of the wearer, as well as elastic leg means in the form of elastic bands, threads or the like which are affixed to the casing with portions extending at least partially along either side edge of the article at a distance beyond the absorbent body.
In the past, disposable absorbent bodies made of cotton or cellulose were used in combination with liquid-tight plastic backings or plastic pants intended for multiple use. These absorbent bodies had a rectangular shape and the manufacture thereof was a quite simple process.
The demands on comfort, function and easy handling have however lead to products of a more sophisticated nature. The majority of consumers have also gradually changed over to the use of completely disposable articles. Such products have a central absorbent body which normally consists of so-called fluff pulp, or of highly absorbent material possibly in combination with fluff pulp. This absorbent body is enclosed in a casing composed of a liquid permeable outer layer made of fiber fabric for example on the side facing the body of the wearer during use of the article, and a liquid impermeable layer, generally a plastic film, on the opposite side. The casing extends laterally beyond the absorbent body and is provided with elastic members serving to seal around the legs of the wearer. In normal cases, the absorbent body is non-rectangular but is instead made to conform to the bodily shape of the wearer, for which purpose it may be hourglass-shaped with a center portion made narrower in relation to the end portions, or it can be T-shaped with a wider portion fitting snugly to the wearer's abdomen and being located forwardly of the crotch portion.
The methods of producing completely disposable articles of this type however require quite advanced and thus expensive automated equipment. In order to keep the manufacturing costs of such articles at a competitive level in relation to simple, rectangular absorbent bodies used in combination with plastic backings, there is actually demanded a high manufacturing speed. Also, the development of such products leads to articles having a smoother and more pleasant finish, which are factors adding to the material costs so that in order to make the production profitable enough, the manufacturing rate has to be accelerated to a still higher degree.
Moreover, absorbent articles of the afore-described kind are comparatively voluminous and must therefore be folded and compressed before being inserted in multi-piece packages.
Since the articles in question are manufactured in a continuous path from which individual articles are cut prior to folding and packaging, folding and packaging of these separate items will be most difficult to carry out at such extreme manufacturing rates. As a consequence, frequently occurring production disturbances are normal in conventional folding and packaging plants and give rise to manufacturing stoppage, which in turn leads to poor operational economy. In particular, the portions of the casing provided with elastic members and projecting beyond the side edges of the absorbent body are elements giving rise to serious problems in the folding and handling process, and operational disturbances are most frequently caused by such casing portions getting dislocated and hooked.
The present invention has for its object to teach a novel and simplified method of folding, which can be employed in connection with manufacture of the disposable articles mentioned in the introduction for eliminating the operational disturbances caused by the casing portions projecting from each individual article.
To this end, the method according to the invention is primarily characterized in that the ends of th
REFERENCES:
patent: 2693439 (1954-11-01), Blanchard et al.
patent: 3963029 (1976-06-01), Brooks
patent: 4022456 (1977-05-01), Hooper
patent: 4050462 (1977-09-01), Woon
patent: 4585448 (1986-04-01), Enloe
patent: 4674135 (1987-06-01), Greene
Froidh Arne
Persson Lennart
Ball Michael W.
Maki Steven D.
Molnlycke AB
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