Buckles – buttons – clasps – etc. – Belt fasteners – Splices
Patent
1996-09-16
1998-03-10
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Belt fasteners
Splices
24 31C, 24 33L, F16G 300
Patent
active
057247064
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
TECHNICAL FIELD OF THE INVENTION
The present invention concerns a disconnectible and reconnectible jointing device for a conveyor band made up of two flat flexible elements assuming at thin front end complementary shapes capable of interleaving in one same plane, linked rearwardly by sticking, vulcanization, riveting, clamping thermoplastic welding, to the ends of a conveyor band, or formed directly by molding on the ends of the conveyor band, characterised by the fact that each one of the flexible elements comprises it the front end oblong strips in the longitudinal direction, spaced apart by notches of complementary shape with respect to those of the strips, the said strips comprising aligned holes capable or receiving at least two and preferably several linking stems which cross through the holes in an approximately transversal direction and made of an elastomer material, reinforced by one or several reinforcement layers, to which adheres the elastomer material, the number of jointing stems and their spacing in the longitudinal direction being selected on the one hand in relation with the forces to be transmitted by the conveyor band and on the other hand in relation with the adherence of the elastomer material surfaces to the reinforcement layer or reinforcement layers surfaces.
By way of convention, longitudinal, means here the longitudinal direction of the conveyor band on which the elements of the junction device according to the invention are to be mounted or inserted, whether or not these elements are already placed on the conveyor band. Transversal direction means the direction at right angle to the longitudinal direction as defined hereabove.
Also, by way of convention, forward means hereafter the side of a junction device element located opposite to the end of the conveyor band and rearward means, the side of a junction device element located towards the conveyor band.
SUMMARY AND OBJECT OF THE INVENTION
The increasing diversity of the utilisation fields implies the provision of conveyor bands, specifically designed for different utilisation fields. The present invention aims to propose junction devices, the structure of which is such that it enables an easy adaptation of the properties of flexibility and of tensile strength opposed to the forces exerted on the longitudinal direction over the conveyor bands in the various fields of utilisation. Furthermore, the junction devices according to the invention must withstanding without damage and without appreciable wearing the tensile forces acting on their upper part and the compression forces acting on their lower part during the passage of these latter over the rollers (either driving or idle). These forces are due to the difference of path covered respectively by the upper part and by the lower part, as explained further on in connection with the figures showing embodiments of the invention.
The present invention aims also to propose methods for manufacturing the junction devices according to the invention, and methods for their implementation.
The strips of the junction device elements may be of various shapes provided the notches which separate the strips have a shape complementary to those of the strips in order to be capable of receiving the strips of the other element of the junction device. The simplest shape is the rectangular one. In this case the strips located on the edges may have exactly the same shape as those located further towards the middle of the junction device elements. However, in practice, trapezoidal shapes are preferred, where the front side is smaller than the one adjacent to the rear part of the junction device element. These trapezoidal shapes enable an easier interleaving of the strips belonging alternately to each one of the junction device elements, the insertion of these strips in the notches of complementary shape being easier. This last shape is shown further on on the drawings representing the embodiments described. Other shapes are also acceptable, the sole condition to be com
REFERENCES:
patent: 1303027 (1919-05-01), Carr
patent: 3300826 (1967-01-01), Read
patent: 3744095 (1973-07-01), Tomlinson
ASER
Sakran Victor N.
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