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US RE30,814 EGranted
Apparatus and method for forming barbed tape
AssigneeMan Barrier Corporation
InventorMichael R. Mainiero
Life of this patent
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AssigneeMan Barrier Corporation
InventorMichael R. Mainiero
Estimating the term…
A machine having blanking, barb forming and bending stations is provided for making a coil of metal tape from a substantially planar linear strip of metal stock wherein such strip is fed in sequence to the stations in a single pass through the machine to respectively edge notch the strip into barbs, upset the barbs into inclined relation to the plane of the strip and then edge bend the strip in the plane of the strip to form it into identically angularly displaced adjoining linear segments of equal length to make a generally annular coil of barbed metal tape. The method of this invention features forming spaced openings along a longitudinal axis of a substantially planar linear strip of metal stock, positioning the strip by means of its openings and edge bending the strip in the plane of the strip adjacent its openings to form the strip into a coil having identical angularly displaced adjoining linear segments.
A method of making a coil from a strip of metal stock and comprising the steps of providing a substantially planar linear strip of metal stock, forming spaced openings along a longitudinal axis of the strip, positioning the strip by means of its openings for subsequent edge bending, and edge bending the strip in the plane of the strip adjacent its opening to form the strip into angularly displaced adjoining linear segments.
A method of making a coil of barbed tape from a strip of metal stock and comprising the steps of providing a substantially planar linear strip of metal stock, providing a path of movement for intermittently feeding the strip axially of a central longitudinal axis of the strip, blanking longitudinally spaced barbs at equal intervals on at least one edge of the strip by trimming metal from said edge at a blanking station, forming equally spaced openings along the central longitudinal axis of the strip in longitudinally spaced relation to the barbs, upsetting the barbs at a forming station into inclined relation to the plane of the strip, and edge bending the strip in one angular direction at a bending station in the plane of the strip adjacent its openings to form the strip into barbed tape having adjoining linear segments of equal length uniformly offset at equal bend angles relative to their respective trailing segment.
A machine for making a coil of metal tape from a substantially planar linear strip of flat metal stock and comprising means for forming spaced openings along a longitudinal axis of the strip, and a pair of jaws mounted for movement toward and away from one another between relatively closed and open positions for releasably clamping the apertured strip, the jaws being articulated jaws having matching jaw segments supported for relative swinging movement for edge bending the clamped strip in the plane of the strip adjacent its opening to form the strip into angularly displaced adjoining linear segments.
A machine for making a coil of metal tape from a substantially planar linear strip of flat metal stock and comprising indexing means for intermittently feeding successive lengths of strip along a linear strip feed path aligned with a longitudinally extending axis of the strip, a plurality of work stations disposed in the strip feed path including a blanking station, a forming station, and a bending station in progressively disposed downstream relation to each other, the blanking station having die means for trimming metal from at least one edge of the strip to define equally spaced barbs on said one edge and for forming openings in the strip on its central longitudinally extending axis with the openings located in equally spaced relation intermediate the barbs, the forming station having die means therein for upsetting the barbs into inclined relation to the plane of the strip, and the bending station having multi-segmented, articulated releasable clamping jaws with matching jaw segments supported for relative swinging movement between a starting position aligned with the strip feed path and an extended angular position, wherein the matching jaw segments are in misaligned relation to adjoining segments of their respective jaws, for edge bending the clamped strip in the plane of the strip adjacent its openings to form the strip into angularly displaced adjoining linear segments of equal length.
A machine for making a coil of metal tape from a flat strip of metal stock and comprising [means for forming spaced openings along a longitudinal axis of the strip,] a pair of nonrotatable jaws for releasably clamping the strip [on an upstream side of one strip opening], a second pair of rotatable jaws for releasably clamping the strip on a downstream side of said [one strip opening] first pair of jaws , and drive means for swinging said second pair of jaws relative to the first pair of jaws for edge bending the clamped strip in the plane of the strip [about its opening] to form the strip into angularly displaced linear segments , die means for forming barbs on at least one edge of the strip .
A method of making a coil from a strip of metal stock and comprising the steps of providing a strip of metal stock, [forming spaced openings along a longitudinal axis of the strip,] clamping a portion of the strip [on an upstream side of one strip opening], and edge bending the strip in the plane of the strip [about its opening] on a downstream side of [said one opening] the clamped portion of the strip to form the strip into angularly displaced adjoining linear segments , and blanking barbs on at least one longitudinally extending edge of the strip .
Dependencies are inferred from the claim text.