Buckles – buttons – clasps – etc. – Button with fastener – Button with cavity for friction grip fastener
Reexamination Certificate
2000-01-25
2001-11-13
Sandy, Robert J. (Department: 3626)
Buckles, buttons, clasps, etc.
Button with fastener
Button with cavity for friction grip fastener
C024S662000, C024S114600
Reexamination Certificate
active
06314621
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a tape-mounted fastener made of synthetic resin usable in the openings of clothing, bags, shoes, etc., and to a manufacturing method thereof. BACKGROUND OF THE INVENTION
Generally a tape-mounted fastener comprises a male tape consisting of several synthetic resin male parts molded and fastened onto a cloth tape at certain intervals and a female tape consisting of several synthetic resin female parts molded and fastened onto a cloth tape at the same intervals as the male parts (e.g., EP0228293B2 by the present applicant).
While the above tape-mounted fastener has mounting holes established on cloth tapes, a tape-mounted fastener comprising male parts and female parts firmly molded and fastened without mounting holes pierced on cloth tapes is also known (e.g., JP-A-10-33211 by the present applicant).
SUMMARY OF THE INVENTION
The present invention is an improvement on the latter invention, and in particular, in respect of the male parts. The first objective of the present invention is to reduce the thickness of the entire fastener by lowering the height of the engagement protrusion of the male parts without detriment to their strength.
The second objective of the present invention is to reduce the size of the male parts without detriment to their strength.
The third objective of the present invention is to make the junction of the cloth tapes and the synthetic resin of the male and female parts more stable, thereby preventing the cloth from emerging from the synthetic resin of the male and female parts or the cloth from bending or undulating as a result of the injection pressure.
The tape-mounted fastener of the present invention comprises a male tape and a female tape in which the male tape is made of a cloth tape on which several resin male parts are molded and fastened at certain intervals and the female tape is made of a cloth tape on which several resin female parts are molded and fastened at the same intervals as said male parts with no mounting holes pierced on either of said cloth tapes, characterized in that the engagement protrusions of the male parts stand upright directly from the cloth tape without the aid of a base.
The manufacturing method of the tape-mounted fastener of the present invention relates to the tape-mounted fastener comprising a male tape and a female tape in which the male tape is made of a cloth tape on which several resin male parts are molded and fastened at certain intervals and the female tape is made of a cloth tape on which several resin female parts are molded and fastened at the same intervals as said male parts with no mounting holes pierced on either of said cloth tapes, and its characteristics with respect to the male parts and the female parts are as described below.
In order to mould the male part, a non-porous cloth tape having a coarse texture that allows the percolation of molten resin under a molding pressure is provided between the upper and lower dies forming a space for molding the fastener, and the cloth tape at the dents positioned inside the engagement protrusions of the male parts is sandwiched and fastened by said upper and lower dies, after which synthetic resin is injected into the space for molding so that the front side and the back side of the male parts formed on either side of the cloth tape are integrated by the synthetic resin percolating through the cloth tape.
In order to mould the female parts, a non-porous cloth tape having a coarse texture that allows the percolation of molten resin under a molding pressure is provided between the upper and lower dies forming a space for molding the fastener, and the cloth tape at the engagement dents of the female parts is sandwiched and fastened by said upper and lower dies, after which synthetic resin is injected into the space for molding so that the front side and the back side of the female parts formed on either side of the cloth tape are integrated by the synthetic resin percolating through the cloth tape.
In the tape-mounted fastener of the present invention, the male parts have no base. Accordingly it is preferable that the engagement protrusions have a somewhat greater thickness than those of the prior art.
The male parts and the female parts should preferably have a ring shape when viewed from the front or from the back. However, the interior profile of the male parts and the exterior profile of the female parts, which have no relevance to the engagement, may be freely designed from an aesthetic point of view.
According to the tape-mounted fastener of the present invention, the engagement edge of either the male parts or the female parts may be polygonal.
The bulging edges for engagement are preferably formed on both the outside and inside of the tip of the engagement protrusions of the male parts. With this design, the male parts can also function as female parts in that the inside bulging edges of the male parts can engage with the outside bulging edges of another group of male parts.
According to the present invention, the height of the engagement protrusions of the male parts can be made lower by as much as the height of the base of the prior art, resulting in a smaller overall thickness of the fastener without detriment to its strength.
Because there is no base, the size of the male parts can also be made smaller without detriment to the fastener's strength.
Because the central dents of both the male and female parts are sandwiched and fastened by the upper and lower dies during the molding process, the injection pressure is applied to only a small area, boosting the stability of the junction between the cloth tape and the synthetic resin of the male parts. As a result, the cloth does not emerge from the synthetic resin of the male and female parts.
REFERENCES:
patent: 3206818 (1965-09-01), Knowlton
patent: 3378893 (1968-04-01), Labek
patent: 3650647 (1972-03-01), Jacobs et al.
patent: 3800368 (1974-04-01), Simon
patent: 3878588 (1975-04-01), Soto
patent: 3890679 (1975-06-01), Simon
patent: 4735753 (1988-04-01), Ackermann
patent: 5357659 (1994-10-01), Ackermann
patent: 228 293 (1990-07-01), None
patent: 10-33211 (1998-02-01), None
Merchant & Gould P.C.
Morito Co., Ltd.
Sandy Robert J.
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