Surgery – Means for inserting fibrous or foraminous resident packing,...
Patent
1984-09-21
1986-09-09
Yasko, John D.
Surgery
Means for inserting fibrous or foraminous resident packing,...
604 15, A61F 1320
Patent
active
046106596
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a tampon pack, in particular for female hygiene, consisting of a tampon applicator having an applicator shell and a plunger telescopically mounted therein to be axially movable, and of a tampon which is located in the applicator shell, has a withdrawal cord and can be pushed out of the applicator shell by means of the plunger, a flexible packing film being provided in the region of the introduction end of the tampon and being held on the applicator shell.
Tampon packs of this type are known. For example in British Patent Specification No. 1,262,887, a tampon applicator is described which essentially consists of an applicator shell and a plunger which is axially movable therein. At its introduction end, the applicator is closed by a cap of a plastic film. On the introduction end of the applicator, a sleeve of the plastic film is arranged, which sleeve projects beyond the introduction end of the applicator. The open end of the sleeve is closed by folding, forming the said cap. When the applicator is used, the tampon is forced by axial pressure on the plunger from the inside against the folded closed end of the cap, which thus opens and clears the path for pushing the tampon out.
Tampons of this type increase their volume by absorbing moisture or fluid. When this happens while the tampon is still inside the applicator, for example when stored in a humid environment, the tampon can jam in the applicator shell due to the increased volume and make it considerably more difficult to push it out of the applicator. For this reason, a substantial increase in volume of the tampon must be prevented by suitable means, and this is possible, for example, by excluding water vapor.
Admittedly, the cap of the known tampon applicator will be able, if it consists of a suitable material, to prevent the penetration of water vapor through the introduction end of the applicator into the tampon. However, the rear tampon end can still absorb water vapor through the hollow plunger and/or through the gap between the plunger and applicator shell. For this reason, further measures are necessary in order to avoid an increase in volume of the tampon in the known applicator by the absorption of water vapor.
The invention is based on the object of developing a tampon pack of the type set forth above, in such a way that the tampon pack fulfills its purpose even after a prolonged storage period, in particular in a relatively humid environment, that is to say to prevent an increase in the volume of the tampon, which is caused by the absorption of water vapor and would make it more difficult to push the tampon out of the applicator. At the same time, the quantity, which is required per tampon pack and is significant for this mass-produced article, of valuable packaging material impermeable to water vapor is to be reduced.
According to the invention, this object is achieved when the packaging film surrounds substantially the entire surface of the tampon, is made to be substantially impermeable to water vapor and is provided, on the inside facing the tampon, with a coating having a low coefficient of sliding friction.
In the normal case, this prevents the tampon from absorbing relatively large quantities of water vapor, while it is in storage, and thus substantially increasing its volume. If nevertheless, in exceptional cases, the packaged tampon tries to expand for any reason, its increase in volume is limited virtually on all sides by the packaging film which is in taut contact with the tampon surface. Moreover, the coating, having a low coefficient of sliding friction, on the inside of the packaging film ensures in these cases that the tampon can still be relatively easily pressed out of this film and out of the applicator shell.
Wrapping of only the tampons with a packaging film impermeable to water vapor allows the packaged tampons to be held in intermediate storage for a longer period, before they are made up with the applicators. During the intermediate storage, the tampons substantially retain the volume given to
REFERENCES:
patent: 3139886 (1964-07-01), Tallman et al.
patent: 3499447 (1970-03-01), Mattes et al.
patent: 3674025 (1972-07-01), Bleuer
Johnson & Johnson G.m.b.H.
Lipow Jason
Yasko John D.
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