Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1991-01-08
1994-04-12
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 66, B65H 1928
Patent
active
053018907
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a device for initiating the winding of a new, empty winding core, which replaces a fully wound bolt, with a continuous length of flexible material fed in by a draw-in roller that, in the winding-on position, is at axial distance to the fully wound bolt. The device has: a core feed, by means of which a new empty core is brought into a winding-on position in peripheral and driving contact with the draw-in roller, in which it is partially wrapped round by the section of the length of material that is fed tautly between the draw-in roller and the fully wound bolt; an application guide, on which a freely turning winding-on roller is mounted axially parallel to the draw-in roller and which, in its advance direction, on the side of the length of material that is fed tautly over a gap and is turned away from the empty core, is moved in the direction of rotation of the empty core taking with it the length of material, whereby the angle of wrap of the length of material round the new core is increased to more than 180 degrees; a cutting mechanism, by means of which the length of material that is tautly fed over the space between the winding-on roller and the fully wound bolt is cut, and means by which the new section of the length of material, under continuation of wrapping of the empty core and preceded by a fold as start of the first layer of the new bolt, is fed from the top into the gap that opens upwards between the winding-on roller and the full core and which, due to the rotation of the draw-in roller that is set for drawing-in, is drawn into the gap.
With such devices, it is important that the new start of the length of material is applied to the new core onto which it is to be wound without having to interrupt the continuous feed of the length of material. The lengths of material in question can be woven or knitted materials and fabrics and the like, as well as latticed webs of synthetic materials and foam rubber.
In the case of a device of this kind disclosed in U.S. Pat. No. 4,000,863, there is a turning arrangement, whereby the start of the new length of material is folded round its front edge. The turning arrangement is then driven into and wedged in the gap between the draw-in roller and the empty core to be wound. Hereby the start of the length of material, which is preceded by the fold caused by the turned over edge, is driven into the gap by the turning arrangement until being engaged between the draw-in roller and the new core. Once this has happened, the turning arrangement is then withdrawn from the fold of the length of material and, thus, also out of the gap.
In the case of the disclosed device, the turning arrangement necessarily requires the guiding of the start of the new length of material until it is jammed in between the draw-in roller and the empty core and engages.
SUMMARY OF THE INVENTION
An object of the present invention is to design a device of the type originally described in a more simple way, in particular in such a way that it can be easily adapted to accommodate the various qualities of the materials to be handled with regard to flexibility, thickness and so forth.
The distinguishing features of the present invention are that there is a guide plate mounted on the application guide that extends across the complete width of the winding-on roller at radial distance to the circumference of the winding-on roller and over a section of the circumference of the winding-on roller. At the front end in the advance direction, the guide plate features a front edge that extends axially parallel to the draw-in roller, and the guide plate also features a guide surface on the outside for the new section of the length of material, on which it can be spread out flat and slide. In the end position of the advance movement of the application guide, the empty core is wrapped round by at least 240 degrees and the front edge of the guide plate is at radial distance to the circumference of the empty core and at radial distance to the circumference
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Darling John P.
Stodola Daniel P.
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