Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1997-09-24
1999-07-27
Weiss, John G.
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
156163, 156229, 156496, A61F 1315
Patent
active
059282118
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a method of elastifying a substrate blank and to an elastified substrate blank.
Elastic net or film has been used to elastify pants type articles, such as diapers, pant diapers, sanitary briefs, incontinance garments etc. GB-A 2 248 380 describes for example a method for elastifying a pants type disposable article, whereby elastic threads are laid out in alternating straight sections and curved sections corresponding to the leg portions. Separate transverse elastic portions are laid in the waist sections. In general this is a very complicated procedure involving a number of steps and which are prone to malfunctioning. Nor is it possible according to this known method to elastify an entire pants type article to hold it securely in place against the body of the wearer.
WO 93/18729 describes the application of net elastic strips in straight lines, longitudinally to elastify the leg openings and transversely to elastify the waist portions. This is simpler than the above method but the straight leg opening elastic strips do not conform well to the wearers legs when worn. As in the above case, such elastification requires both transverse and longitudinal laying of the strips and the entire pants type article is not elastified, only the end and side edge portions.
SUMMARY OF THE INVENTION
These and other problems are avoided by the method of the present invention. The method according to the invention makes it possible to lay an elastic net in a simple and reliable manner so that a longitudinal section of a web of elastic netting or film with straight parallel sides will naturally assume the hour-glass shape of the diaper or pants substrate blank and can be afixed thereto. The longitudinally stretched intermediate crotch section will naturally assume the form of the leg openings providing elastic threads of elastified film portions naturally conforming to the concave leg opening edges, thus providing security against leakage. The waist portions will also naturally assume a substantially straight edge configuration when a series of pants blanks are elastified end-to-end in a web.
According to a further development of the inventive method, apertures in the net or film can be provided in a very simple manner at the areas which will directly face the anus and the urethral opening when a diaper or pants diaper is worn, by making a simple slit at each desired location.
BRIEF DESCRIPTION OF THE DRAWINGS
These and further advantages will become evident from the following detailed description with reference to the figures in the drawing of which:
FIG. 1 shows a web net which is elastic both longitudinally and laterally, and which is slipped in its untensioned state onto pegs mounted on carriages,
FIG. 2 shows the web net shown in FIG. 1 after the carriages have been separated from each other in accordance with the invention.
FIG. 3 shows the web net shown in FIG. 2 bonded to a pant-diaper substrate web after having been stretched, in accordance with the method of the present invention,
FIG. 4 shows a pant-diaper substrate blank made according to another variation of the method according to the invention and where longitudinal slits have been made in the net prior to bonding to the substrate,
FIG. 5 shows a pant-diaper substrate blank but where two parallel rectangular lengths of elastic net have been bonded to the substrate in accordance with the invention.
FIG. 6 shows a pant diaper substrate similar to that shown in FIG. 4 with an elastic net bonded to the substrate.
FIG. 7 shows the pant diaper substrate with net in accordance with FIG. 6 with an absorption unit fastened on the pant substrate.
FIG. 8 shows the pant substrate with net in accordance with FIG. 6 with an absorption unit of a second embodiment fastened to the pant substrate.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 shows a portion of a web net of indefinite length, delivered from a roll for example, which can be rubber or artificial resin fused at the interstices 2 between the lon
REFERENCES:
patent: 4421512 (1983-12-01), Papajohn
patent: 4488923 (1984-12-01), Pieniak
patent: 4525407 (1985-06-01), Ness
patent: 4606964 (1986-08-01), Wideman
Gustafsson Anders
Widlund Urban
Ruhl Dennis
SCA Molnlycke AB
Weiss John G.
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