Buckles – buttons – clasps – etc. – Button with fastener – Deflecting prong or rivet
Reexamination Certificate
2000-12-14
2002-10-01
Sakran, Victor (Department: 3677)
Buckles, buttons, clasps, etc.
Button with fastener
Deflecting prong or rivet
C024S095000, C024S096000, C024S1130MP
Reexamination Certificate
active
06457213
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a metallic tack for use upon attaching a button for jeans to its cloth and more particularly to a button attaching tack which never induces puckering phenomenon in the cloth when the cloth is pierced therewith.
2. Description of the Related Art
According to a conventional tack
1
′ for button disclosed in Japanese Utility Model Publication No. 63-10729, as shown in
FIG. 13
, a cylindrical post
4
′ stands on the center of a seat plate
3
′. The post
4
′ is made of metal and an end of the post
4
′ is ground to have a head
5
′ shaped in quadrangular pyramid. Concave portions
21
′ are formed in the post
4
′ below the head
5
′ so as to facilitate deformation of the head
5
′. After this tack
1
′ is pierced into cloth, it is inserted into a boss portion of a metallic button. At this time, the head
5
′ is pressed, so that it is deformed through the concave portions
21
′ in the post
4
′ thereby the head being fixed in the boss portion.
Further, according to a tack
1
′ for button disclosed in Japanese Utility Model Laid-Open Publication No. 60-69008, as shown in
FIG. 14
, a cylindrical post
4
″ stands on the center of a seat plate
3
″. An end of the post
4
W is formed to have a conical head
5
″ protruded with respect from an outer periphery of the post
4
″. Then, plural stages of truncated cone-shaped engaging portions
8
″ protruded with respect to the outer periphery of the post
4
″ like the head
5
R are formed in the post
4
″ below the head
5
″. After this tack
1
″ is pierced into cloth, it is inserted into an attaching hole formed in a boss portion of resin made button. Consequently, the tack for button is fixed in the boss portion by means of the head
5
″ and the engaging portions
8
″.
The aforementioned tack
1
′ for button shown in
FIG. 13
is different from a tack of the present invention in engagement manner between the tack
1
′ and the boss portion of a button. In case of this conventional tack
1
′, it is fixed to the boss portion of a metallic button by deforming a front end of the tack
1
′ by pressure. Therefore, the tack
1
′ is so constructed that the post
4
′ and head
5
′ are connected to form a smooth surface and has no engaging portion which protrudes with respect from the post. Thus, there is such a problem that this tack cannot be fixed easily to the boss portion of a resin button.
Further, the tack
1
″ for button shown in
FIG. 14
has a problem that because the head
5
″ formed at an end of the post
4
″ is conical, when the tack is pierced into cloth, the head
5
″ makes facial contact with the cloth so that a large resistance is generated thereby often leading to the puckering phenomenon.
SUMMARY OF THE INVENTION
The present invention has been accomplished in view of the above described problems and an object of a main aspect of the invention is to provide a tack for button for use upon fixing a jeans button to jeans cloth, wherein a head thereof is formed in a shape not making a facial contact with cloth producing a large contact resistance but making a linear contact with cloth producing a less resistance when the tack for button is pierced into the cloth, so that no puckering phenomenon occurs. This tack has a simple structure and tough engaging mechanism so that it can be engaged with the boss portion firmly and fixed thereto.
It is also an object of the present invention is to provide a tack for button, wherein a proximal periphery of the head is protruded outwardly of a post so that the head of the tack engages firmly with the boss portion of a button, or a tack for button capable of being pierced easily, which can be engaged with the boss portion of a button with corners of the head.
Another object of the present invention is to provide a tack for button, wherein the corners of the head are exposed more so that they can be engaged firmly when the proximal end of the head is engaged with the boss portion of the button, thereby the engaging performance is improved.
A further object of the present invention is to provide a tack for button, wherein the post thereof can be engaged firmly with the boss portion of the button by means of engaging protruding portion disposed above the post, thereby the engaging performance is improved.
Another object of the present invention is to provide a tack for button, wherein the shape of the head thereof is formed in a pointed shape allowing it to be pierced into cloth easily, thereby facilitating the piercing operation.
Another object of the present invention is to provide a tack for button and a boss portion, which are formed using specified materials in a shape matching with each material, thereby achieving easy and firm engagement between the tack for button and the boss portion.
To achieve the above object, according to the main aspect of the invention, there is provided a tack for button, wherein a post stands upward from the center of a flat seat plate; a polygonal pyramid shaped head is formed integrally at an end of the post; and sharp and strong corners provided on a proximal periphery at a lower end of the head are protruded out of a peripheral face of the post so as to form an engaging portion, thereby the engaging performance of the head being intensified.
Preferably, the proximal periphery at a lower end of the polygonal pyramid shaped head, which is provided at an end of the post, is protruded out of an outer peripheral face of the post, thereby the engaging performance of the head being intensified.
Alternatively, part of the proximal periphery of the corner in the polygonal pyramid head, which is provided at an end of the post, is located inside with respect to the outer peripheral face of the post, thereby the engaging performance and piercing function of the head being intensified.
Preferably, a bottom face of each of the corners of the head extends inwardly at a border between the head and the post so that a neck portion thinner than the post is formed, thereby the engaging performance of the head being intensified.
Also preferably, a neck portion thinner than the post is formed under the head formed on the tack; an engaging protruding portion is provided on the post below the neck portion so as to protrude therefrom, thereby the engaging performance of the tack being intensified.
Preferably, a vertical angle of each of peripheral faces formed on the polygonal pyramid head, which is provided at an end of the post, is in a range of 20 to 40° to make the head sharp, thereby the piercing performance of the head being intensified.
Preferably, the tack is formed of metal and the boss portion in which the tack is to be inserted is formed of thermoplastic resin, thereby the engaging performance between the tack and the boss portion of a button being intensified.
REFERENCES:
patent: 2018105 (1935-10-01), White
patent: 3028646 (1962-04-01), Janes
patent: 4571780 (1986-02-01), Fukuroi
patent: 4607415 (1986-08-01), Fukuroi
patent: 4788753 (1988-12-01), Sparrow et al.
patent: 4943197 (1990-07-01), Baritz
patent: 5575043 (1996-11-01), Candotti
Finnegan Henderson Farabow Garrett & Dunner LLP
Sakran Victor
YKK Corporation
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