Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1993-07-01
1995-02-28
Knable, Geoffrey L.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156117, 156178, 156439, 156440, B29D 3038
Patent
active
053933648
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to devices and methods for applying threads to supports, in particular supports of plastic or rubber, these devices and methods making it possible, for example, to produce reinforcement plies, in particular reinforcement plies for tires. The invention relates, in particular, to methods and devices which make it possible to apply threads to a support while imparting a nonrectilinear shape to them, for instance a sinuous shape.
Devices which make it possible to apply threads to a support while imparting a sinuous shape to them are described, for instance, in the following patents or patent applications: FR 2 042 859, FR 2 325 497, FR 2 501 126, SU 704, 816, WO 81/1151.
These devices have at least one of the following drawbacks: making costly and frequent maintenance necessary; obtained have a heterogeneous geometry and therefore present physical properties which vary in accordance with their length.
Application EP-A 318 791 describes a device for applying threads to a support using two clamps, a front clamp and a rear clamp as seen in the direction of advance of the support and of the threads, the device comprising means making it possible to open and close the clamps and means for displacing the rear clamp along the direction of advance or along a direction opposite to the direction of advance, as well as means for displacing the threads in transverse directions. The device described in said application EP-A-318 791 makes it possible to lay the threads with great precision, but the speed of laying is relatively slow due to the complex succession of movements of the clamps, which require stops of the support upon transverse movements of the threads before they are applied to the support and upon the application of the threads to the support.
SUMMARY OF THE INVENTION
The object of the invention is to overcome the drawbacks described above.
Accordingly, the method of the invention for applying a plurality of threads to at least one support so as to obtain at least one ply while imparting a nonlinear shape to the threads is characterized by the following features: drum rotating around an axis; which are displaced with respect to each other parallel to the axis of rotation; contact with a thread, and an anchoring zone; displacement of each thread, measured parallel to the axis of rotation, is determined by the ratio between the speed of arrival of this thread and the peripheral speed of the drum; and the threads are applied to the support or supports after the threads have been displaced on the drum; in contact with said support, are removed from the drum.
The invention also concerns a device for applying a plurality of threads onto at least one support so as to obtain at least one ply, while imparting to the threads a nonrectilinear shape, the device being characterized by the following features: in rotation around an axis; with a controlled speed, onto the drum; with respect to each other parallel to the axis of rotation, so as to impart the nonrectilinear shape to the threads; with a thread and an anchoring zone; arrive in contact with the drum and of applying the threads on the support or supports after these threads have been displaced; or plies each formed by the support or supports and by the threads in contact with said support.
The invention also relates to the plies obtained by the method or device previously described above, as well as articles incorporating these plies, these articles being, for instance, hoses, membranes, belts, or tires.
The expression "thread" is to be taken in a very broad sense. A thread may be a "single thread" formed, for instance, of one or more filaments. When the single thread is formed of a single filament, it is referred to as a "monofilament" and when the single thread is formed by several filaments, it is referred to as a "multifilament".
A thread may, furthermore, itself be an assembly of single threads. By way of example, such an assembly is called a "twist" when it is formed by several individual threads c
REFERENCES:
patent: 2606133 (1952-08-01), Havens
patent: 2828795 (1958-04-01), Hartstein
patent: 3272679 (1966-09-01), Hebberling
patent: 3954547 (1976-05-01), Genthner
patent: 4820143 (1989-04-01), Eroskey et al.
patent: 4981542 (1991-01-01), Carrier
patent: 5002621 (1991-03-01), Ikeda
patent: 5242520 (1993-09-01), Carrier
Compagnie Generale des Etablissements Michelin - Michelin & Cie
Knable Geoffrey L.
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