Metal working – Bias cutting of tubular stock
Patent
1989-12-21
1991-03-19
Watts, Douglas D.
Metal working
Bias cutting of tubular stock
29 215, 29 222, 83175, B26D 316
Patent
active
049998927
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to a device at machines for continuous separation of a strip from a hose-formed material web, whereby the device incorporates at least two lead rollers at least one of which is tiltable relative to the other. Thus the end portion of the material web which is threaded on the guide rollers at rotation of the guide rollers is imparted a continuous, axial feeding motion towards a severing device.
BACKGROUND OF THE INVENTION
The initial material for production of above-mentioned strips is preferably a tubular knitted, hose-formed knitted web, from which is continuously severed one or more strips, whereby the knitted tube is rotated at the same time as it is fed axially against a cutting member, which severs the strip in helical form.
The inner circumference of the knitted tube may vary from one tubular knitting machine to another, but it may also differ from one manufacturer to another. It therefore is necessary to be able to adapt the mutual position of the lead rollers to the inner circumference of the material hose, which has hitherto been obtained in that the tiltable lead roller is suspended in a ball joint. With such a design it however is not possible to obtain a position finding in a three-dimensional system of coordinates. This means that the machine, at adjustment to a material web of a different diameter, must be completely re-aligned, which means that one meter or more of the material web is used for the very alignment not to mention a big waste of time. There is also known a rather complicated rod system, incorporating double rods in the X-Y coordinates, and a particular adjustment device for the adjustment of the lead roller or lead rollers in the Z-coordinate. This known device is both complicated and expensive to manufacture and it requires a big space. It is furthermore difficult to make the adjustments.
PURPOSE AND MOST ESSENTIAL FEATURES OF THE INVENTION
The purpose of the present invention is to provide a device of the type mentioned in the introductory part, which has a simple design and therefore inexpensive to produce, which with some simple had grips allows a change of the mutual position of the lead rollers for adjustment to the circumference of other material webs. The device furthermore shall be designed thus that it is easy to find an earlier determined X, Y and Z position, thus that there is no unnecessary alignment work. These tasks have been solved in that the tiltable lead roller is supported at one free end of an axially displaceable and in different displacement positions arrestable rod, that the free end of the rod is pivotable to a limited extent, on one hand about a shaft mainly parallel with the rod, and on the other hand about an axis mainly perpendicular to the rod, and that the rod is equipped with means for arresting its free end in different angular positions.
DESCRIPTION OF THE DRAWINGS
The invention hereinafter will be further described with reference to the drawings, which show an embodiment.
FIG. 1 shows in perspective a machine for continuous separation of a strip from a hose-formed material web, which machine is equipped with the device according to the invention.
FIG. 2 shows also in perspective the device according to the invention, dismounted from the stand.
FIG. 3 shows in bigger scale a side view of the front end of the device.
FIG. 4 is a section along line IV-IV in FIG. 3.
FIG. 5 shows in perspective an exploded view of the rearmost retainer of the device.
DESCRIPTION OF EMBODIMENT
The severing machine consists according to FIG. 1 of a stand 11, which at its lower part supports a rotatable disc 12 and at the upper part a feeding and cutting device 13. Reference numeral 14 designates the tubular hose-web, which is intimated in dash-and-dot lines, and which in the embodiment shown is piled, i.e. is folded into a pack 15, which is arranged upon the rotatable disc 12.
The feeding and cutting device incorporates a rotatable, stationary lead roller 16, the rotational axis of which is vertically disposed and which is rotat
REFERENCES:
patent: 3776077 (1973-12-01), Letsche
patent: 4047272 (1977-09-01), King et al.
patent: 4480365 (1984-11-01), Sumoto
Husar John M.
Svegea of Sweden AB
Watts Douglas D.
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