Surgery – Male reproductory tract shields or birth control devices – Condoms
Patent
1995-09-20
1998-11-17
Brown, Michael A.
Surgery
Male reproductory tract shields or birth control devices
Condoms
128918, A61F 544
Patent
active
058363076
DESCRIPTION:
BRIEF SUMMARY
The present invention deals with a procedure for the production of a contraceptive sheath for contraception, especially a contraceptive sheath which guarantees a secure hold on the erected penis of the man.
Such a contraceptive sheath is already known from DE-OS 166 365. The contraceptive sheath known from the state of the art reveals at a certain point in the upper part of the contraceptive sheath an elastic rubber ring, which is put in a deepening groove in the immersion form either by hand or machine and then the actual contraceptive sheath is put on the immersion form. The ringshaped product can be vulcanised either on the inner or outside. Such a ring is regarded as disturbing during use and moreover is large-scale and cost-intensive in production.
Therefore it is the object of the present invention to put at disposal a procedure for production of a contraceptive sheath, which is easy and cheap in production and which meets the requirements of the approving authorities.
This task, is solved by the characterising features of the main claim.
According to the overall term of claim 1 the inventive procedure stands out in that the constricted forming of the immersion tool is defined in the middle by a ring groove, in which the elastic material of at least one immersion bath in at least one immersion process flows in the ring groove of the immersion tool and therefore effects an integrated greater material strength at the place of the constricted forming.
An advantage of the inventive procedure is that the elastic material flows in a ring groove at the upper part of the immersion tool during immersion and the ring groove represents a closed curve. Thereby an integrated greater material strength is effected at the place of the constricted forming. A further essential inventive advantage is that no large-scale vulcanisation steps are required, which firmly connect the elastic ring with the rest of the material.
As a consequence of the above mentioned advantages the person applying it has a great application advantage, which makes the inventive contraceptive sheath pleasant for usage, gives it a strong hold when used, no roughness disturbs on the surface, as is the case with those contraceptive sheaths known, from the state of the art.
An important advantage of the present invention has to be seen in the fact that the prophylactic according to the invention assures a safe fit during use, and that the constricting shaping does not produce any annoying roughness on the surface of the prophylactic.
It has been Found to be advantageous if the constricting shaping is approximately adapted to the shape of the glans of the male penis. However, such a form of constriction is not necessarily required, so that any other desired polygonal form of constriction can be selected provided it is closed within itself.
The fact that the front section of the prophylactic has a larger diameter than the rear section has to be viewed as another advantage, which means that a certain hollow space is formed between the glans of the male penis and the prophylactic.
With the prophylactic where the constricting shaping is adapted to the shape of the glans of the male penis, it has been found to be particularly advantageous that a marking is provided in a predetermined site of the rolled-up prophylactic, which shows the user the position of the shaping.
Additional advantages and developments are contained in the dependent claims.
The invention is explained in the following in greater detail by reference to the drawings, in which:
FIG. 1 shows the lateral view of a prophylactic according to the invention, in connection with which the shaping is adapted to the glans of the male penis;
FIG. 2 shows the lateral view of a prophylactic according to the invention, in connection with which the boundary line between the front and rear parts is circular;
FIG. 3 shows a lateral view of the immersion tool (8); and
FIG. 4 shows an enlarged section of the immersion tool (8).
FIG. 1 shows a prophylactic according to the invention which substantially cons
REFERENCES:
patent: 2348773 (1944-05-01), Wyman
patent: 4798600 (1989-01-01), Meadows
patent: 4846197 (1989-07-01), Benjamin
patent: 5109871 (1992-05-01), Thornton
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