Cutting – Tool engages work during dwell of intermittent workfeed – Operation initiated by work-driven detector means to measure...
Patent
1988-10-26
1991-08-27
Phan, Hien H.
Cutting
Tool engages work during dwell of intermittent workfeed
Operation initiated by work-driven detector means to measure...
83210, 83276, 83369, 140105, 281 273, 412 39, B42B 510
Patent
active
050423436
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a device for cutting a wire binding portion for binding a pack of sheets in which, over a casing, is rotatably mounted a delivery spool with an endless wire strand shaped into a wire binding, particularly a wire comb binding; Measuring, sensing and cutting means are provided in the device for separating wire binding portions of given length from the wire strand.
Numerous different constructions are known of devices for cutting wire binding portions, such as are used for binding packs of loose sheets. This involves threading a binding portion produced from wire through a row of holes in the loose sheets in such a way that the sheet pack is reliably held together. It is important that the wire binding portion has precisely the length of the pack and consequently does not project at the edges to avoid getting caught or causing injury.
In the simplest construction such devices comprise a manually or motordriven feed wheel and a cutting mechanism, which separates the wire binding portions in the desired length from a wire shaped into a binding and which is unwound as an endless wire strand from a spool.
In another known device of this type it is admittedly possible to process wire bindings of different wire thickness, different pitch and different diameter, but is is necessary for this to replace in each case one or more parts, e.g. the feed wheel, with parts which are necessary for the particular wire binding. However, this involves additional expenditure and effort. In view of the replacement parts, the number of processed wire bindings is limited.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a device of the aforementioned type which makes it possible to process wire bindings of random size, pitch and wire thickness.
According to the invention this and other objects of the invention are attained by a device comprising a feed mechanism including an envelope drive having an envelope member which is in contact with the wire strand guided on a running path and moves therewith. A further object of the present invention is to enable the device to operate fully automatically, in which only the desired number of wire binding portions and of desired length thereof are fed into the device and then the manufacture thereof takes place automatically.
The aforementioned objects, features and advantages of the invention will, in part, be pointed out with particularity, and will, in part, become obvious from the following more detailed description of the invention. taken in conjunction with the accompanying drawing, which form an integral part thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a diagrammatic representation of a device for cutting wire binding portions, in which the individual parts of the device are drawn apart;
FIG. 2 is a perspective view of the device according to FIG. 1;
FIG. 3 is a top plan view of the device according to FIG. 2;
FIG. 4 is a side view of the feed mechanism;
FIG. 5 illustrates a front view of the feed mechanism according to FIG. 4 from direction V in FIG. 4; and
FIG. 6 shows three diagrammatically represented examples of different wire comb bindings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In the device for the cutting of wire binding portions diagrammatically represented in FIG. 1, 1 is a delivery spool from which is unwound a wire strand 2 shaped as a wire binding and is supplied to a feed mechanism 4, which is housed in a casing 5. Casing 5 also contains a cutting mechanism 6, which separates the desired wire binding portions 3 from wire strand 2.
The delivery spool 1 is rotatably mounted on rollers 7 and is driven by a motor 8. On unwinding the wire strand 2 from the delivery spool 1 a loop 10 is formed, which is controlled by a sensor 12. If the loop 10 is smaller and passes over the sensor 12, motor 8 is put into operation and unwinds wire from the delivery spool 1 until the loop 10 again has its desired size. It is also conceivable to drive the rollers 7, which would
REFERENCES:
patent: 3177749 (1965-04-01), Best et al.
patent: 3334918 (1967-08-01), Pigna et al.
patent: 3796117 (1974-03-01), Mukai et al.
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