Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se
Patent
1997-09-30
2000-10-03
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
264301, 264303, 264304, 264305, 425274, 425275, 425436RM, 451 41, 451 56, 451177, 451259, B28B 704, B28B 138
Patent
active
061268801
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to the production of a shaped prophylactic with special roundings, in connection with which the special form of a plunger tool, on the one hand, and the manufacturing process, on the other hand, play important roles.
Such a plunger tool and process for the manufacture of a prophylactic have been introduced and described in detail in international application 95/25622, or DE 4409449 C1. A prophylactic consisting of an oblong, cylindrical shaft with an end closed by an S-shaped section, and a reservoir section adjoining the latter, is manufactured with said known plunger tool. Provision is made for a deepening which, when the prophylactic is used, comes to rest within the zone of the glans, such deepening being formed by two blunt cones abutting each other with their covering surfaces. The deepening has an opening angle in the range between 60.degree. and 120.degree.. The known prophylactic is produced by immersing it three times in a latex solution. Between each immersing operation, it is passed through a drying furnace, and at the end of the last immersing operation, the known prophylactic is stripped off by means of brushes rotating in opposite directions.
Furthermore, similar processes and devices for producing thin-walled shaped bodies particularly made of natural rubber compounds are well-known in the state of the art. With the known methods for producing a prophylactic, the plunger tool is undergoing three immersion steps when provided with difficult shapes. The three immersion steps are especially important with shapes having relatively small radii of curvature in certain sites of the plunger tool, so that the elastic material (latex) to be applied on such small radii of curvature is distributed unevenly, which is frequently the cause for tearing and breaking spots, so that the prophylactic fails to satisfy the requirements of the testing authorities.
Since it is generally difficult to manufacture a prophylactic that satisfies the high application requirements with respect to good fit and easy handling, various shapes have been proposed in the state of the art particularly for the upper part of the prophylactic, such shapes being expected to solve the problems on hand. This includes UK-PS 1,142,443, which is known in the state of the art from the year 1967. A prophylactic is known from said patent which has a cylindrical part and an upper shaped part. The upper shaped part of said known prophylactic has a narrowing, which is shaped in such a way that it is expected to assure, a safe fit on the erected male organ. Said prophylactic, however, has no reservoir part at the top end of the prophylactic, as it now can be found on each commercially available prophylactic. Such prophylactics are no longer permissible if only for said reason.
Another decisive drawback is that the radius of curvature of the constriction of the prophylactic in the upper part uniformly extends through the entire deepening, which means that adequately good adaptation to the anatomical conditions of the male penis is not assured at all.
Furthermore, a condom made of rubber became known in 1929 from Austrian patent specification No. 123 532. Said condom has a constriction (a) in the top shaped part and consists of two blunt cones abutting each other with their covering surfaces, whereby the contact points of the blunt cones are smooth. However, the shapes of the plunger tools shown in said patent specification have highly pronounced S-curves of the jacket surfaces of the blunt cones, so that the realization of such a prophylactic for practical use is problematic.
A short condom with a club-like reservoir part is known from CH 96564, which has to be glued to the penis of the user. No measures are disclosed in CH 96564 that would indicate that the club-like reservoir part is raised into an upright position of use by pressure and tensile stresses caused by any special shaping.
The objective of the present invention is to protect a novel type of prophylactic with pronounced shapes in the upper part, whereby
REFERENCES:
patent: 1923733 (1933-08-01), Killian
patent: 2021299 (1935-11-01), Gammeter
patent: 2968134 (1961-01-01), Lewis
patent: 4903679 (1990-02-01), Kiger et al.
patent: 5323544 (1994-06-01), Osgood
patent: 5409416 (1995-04-01), Eichhorn et al.
Innovation & Art GmbH
Mason Suzanne E.
Timm Catherine
LandOfFree
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