Unwinding adjustment device for wire or materials containing...

Metal deforming – By deflecting successively-presented portions of work during... – By tension applied to work or product

Reexamination Certificate

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C072S160000, C242S417300

Reexamination Certificate

active

06237383

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a pay-off reel apparatus for wire or multiple-strand wire material having a pivotal receiver for a reel, a coil or the like, and a bending roller assigned to a processing apparatus.
2. Description of Prior Art
A pay-off reel apparatus is known, from European Patent Reference EP 0 340 322 A1, which feeds coiled material, for example wire from a reel, a coil or a winder to a processing apparatus, and reeling off is frequently performed by drive means.
In a conventional pay-off reel apparatus the feeding force varies constantly, subject to the weight of the reel or coil, simultaneously also impairing entry conditions of the material into the processing apparatus, which then affects the processing quality. With broad reels or coils, the feeding direction towards the feeding roller changes continuously and causes further straining, twisting and deforming, likewise negatively influencing the quality of the subsequent processing operation.
SUMMARY OF THE INVENTION
It is one object of this invention to provide an apparatus and method for reeling off from a spool, coil or the like wherein the prevailing material can be fed to a processing apparatus without its properties fluctuating, such as to develop a pay-off reel straightening apparatus.
This object is attained by a pay-off reel straightening apparatus having the characteristics set forth below in this specification and in the claims.
This invention attains a uniform change of direction while maintaining the original reel curvature of the wire or multiple-strand wire material, a defined elastic change of direction or deflection by the corresponding deflection rollers, and a calculable and constant one-dimensional bending of the wire or multiple-stand wire material after the elastic-plastic deflection or bending at the bending roller. This invention provides optional generation of reverse tension by the bending roller, embraced by the loop of the of the wire or multiple-strand wire material by more than 180° and/or the use of a destressing straightening device, which reliably prevents deformations, helicities, twists or tangling of the wire or multiple-strand wire material. Moments of torsion, causing these effects, are minimized due to an ideally determined spacing between the rollers, as well as a very simple structure of the pay-off reel straightening apparatus. The apparatus of this invention adapts rapidly to the prevailing diameter of the respective material and the corresponding working material of the wire or multiple-strand wire material as well as to existing entry and discharge conditions.


REFERENCES:
patent: 2391679 (1945-12-01), Burge
patent: 2560204 (1951-07-01), Andren
patent: 3871205 (1975-03-01), Fenton
patent: 4360137 (1982-11-01), Noe
patent: 4774824 (1988-10-01), Ritter
patent: 4899945 (1990-02-01), Jones
patent: 5031847 (1991-07-01), Tanaka
patent: 5139206 (1992-08-01), Butler
patent: 5248104 (1993-09-01), Groos et al.
patent: 5366131 (1994-11-01), Hoffa et al.
patent: 5542592 (1996-08-01), Hoffa et al.
patent: 1812802 (1970-06-01), None
patent: 0 340 322 (1989-11-01), None
patent: 0 395 029 B1 (1997-01-01), None
patent: 0 769 830 A2 (1997-04-01), None
patent: 08 324 885 (1996-12-01), None

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