Presses – Binding – Binder applying
Patent
1984-11-13
1985-12-31
Wilhite, Billy J.
Presses
Binding
Binder applying
53589, B65B 1304
Patent
active
045613494
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for guiding relatively rigid wire being pushed along a path whose length varies according to requirements, which path is closed within the assembly.
There exists a need for a device of this type in a baling or binding machine in which a single bundle is made of a plurality of articles that are pressed together by a metal wire. The two free ends of the wire surrounding the articles in question are twisted together in a twist joint to constitute a splice. The splice serves to keep the wire taut over the articles and to fold over the two end portions of the wire in a shape that is rounded overall and is unlikely to cause injury.
The splice is made by means of a head (which does not form part of the present invention) which cuts the wires to the required length, puts them under tension, and then twists together the two end portions.
The wire comes from a reel of wire from which it is unwound, pushed into a first channel through the binder head, and guided around the articles to be bound together. Then it passes back through a second channel in the binder head, and finally it is cut, put under tension and twisted as said above.
The present invention provides a device for guiding the wire around the articles to be bound between the wire leaving the binder head and its returning therein. The path to be followed by the wire is substantially closed on itself; it follows a circuit which is substantially the same as the outline of the right cross section of the articles to be bound. This outline may be circular; but more often it is oblong with straight portions that are interconnected by semicircular portions. Binding is often used to hold together the various turns of coils of metal wire, and the thickness or size of the coil varies with changing length and with changing differences between the inside diameter and the outside diameter of the coil. This leads to considerable modifications in the lengths of the straight portions of the oblong path followed by the binder wire, which path forms a closed loop having two sides that are not in the same plane.
Up to now, in existing binder machines, a wire guide has been used which has the desired shape but which is of constant length. The wire frequently constitutes too big a loop around the articles to be bound. It is thus essential, prior to twisting the wire, to reduce its length by pulling it backwards. This requires reversible type wire propelling means together with a store for receiving excess wire. In addition, during this operation, the wire slides over the articles to be bound and runs the risk of leaving undesirable rub marks thereon.
The main aim of the invention is to provide a binder wire guide device capable of giving just the right length of the wire the desired configuration around the articles to be bound, thus avoiding the need to take back any excess length at all.
A guide device in accordance with the invention is analogous to a plate divided into a first portion and a second portion which portions are applied against each other on either side of a median join plane parallel to the main opposite faces of the plate. A guide channel is hollowed in the internal contacting faces of the the two portions, said channel running between an inlet channel open to the exterior and an outlet channel which is also open to the exterior. A central opening is provided in the device, inside the path of the guide channel for receiving the articles to be bound.
The two portions are movable and may be moved apart from each other relative to the join plane to release the loop of wire from the guide device.
Further, the device may be opened to receive the articles to be bound by virtue of the fact that each of the two portions is generally U-shaped having two spaced apart parallel branches. When the two portions are joined together, the branches of each of them point towards the branches of the other from respective opposite junction zones. The two portions move by sliding their internal faces over each other on either side of the join plan
REFERENCES:
patent: 2959118 (1960-11-01), Hager
patent: 3613557 (1971-10-01), Coleman
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