Process and apparatus for continuous lengthwise cutting of a pile web
AssigneeCarl Schmale GmbH & Co. KG
InventorCarl Schmale
Life of this patent
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Abstract
A process for continuous cutting of a pile fabric web, having at least one comparatively narrow loopless or napless zone running lengthwise thereon between napped or looped surfaces, lengthwise in the exact center of one of the loopless or napless zones. The fabric web is fed lengthwise along a transport path to the motorized cutting device. The position of the cutting device transverse to the feed direction of the fabric is adjusted automatically so that the loopless and napless zone is cut lengthwise along its exact center by coupling the device with a sensor shoe or slider which senses, e.g. by direct contact, the edges of the pile adjoining this zone.
Claims32
In a process for the continuous cutting of a pile fabric web, having at least one comparatively narrow pile-free zone running lengthwise thereon between pile surfaces lengthwise in the exact center of said zone, wherein said fabric web is fed lengthwise along a transport path to a continuous cutting device and the position of said cutting device transverse to the feed direction of said web is adjusted so that said zone is cut lengthwise along said exact center of said zone, the improvement which comprises automatically sensing the position of said zone by a slider to sense both pile edges flanking said zone and riding thereon, and communicating a position of the sensed edges transverse to said feed direction of said fabric web to a means for adjusting said transverse position of said cutting device so as to cut automatically said fabric exactly in said center of said zone, said slider being provided with a guide peg protruding upwardly from the underside of said slider through a cut in said fabric web and is shaped to help hold said fabric web to said slider, and wherein said guide peg is T-shaped, a stem of said T-shaped guide peg protruding upwardly through a slot provided in said slider and arms of said T-shaped guide peg being positioned below said cut in said fabric web, said stem of said T-shaped guide peg being attached to the center of two leaf springs attached lengthwise on the upper surface of said slider to provide a means for pressing said cut fabric web upwardly to said slider to provide for a smoother, more reliable cutting operation, and wherein said slider is constructed and positioned so as to be penetrated by a rotatable cutting knife.
In a fabric cutting apparatus for the continuous cutting of a pile fabric web having at least one comparatively narrow pile-free zone running lengthwise thereon between pile surfaces, lengthwise in the center of said zone, wherein said fabric web is advanced along a path in which it is tensioned longitudinally over at least two rotatable rollers spaced from one another and having parallel axes, and a motor driven cutting device is held adjustably transverse to a feed direction of said fabric web and engages said fabric web between said rotatable rollers, the improvement wherein a sensing slider conformed to fit said zone of said fabric web is positioned and pressed on said fabric web to engage said zone, said slider being held adjustably transverse to said feed direction of said fabric web and being constructed to sense both opposite pile edges of said zone, said slider at least indirectly cooperating with said cutting device to adjust the position of said cutting device transverse to said feed direction of said fabric web, said slider being provided with a guide peg protruding upwardly from the underside of said slider through a cut in said fabric web and is shaped to help hold said fabric web to said slider, and wherein said guide peg is T-shaped, a stem of said T-shaped guide peg protruding upwardly through a slot provided in said slider arms of said T-shaped guide peg being positioned below said cut in said fabric web, said stem of said T-shaped guide peg being attached to the center of two leaf springs attached lengthwise on the upper surface of said slider to provide a means for pressing said cut fabric web upwardly to said slider to provide for a smoother, more reliable cutting operation, and wherein said slider is constructed and positioned so as to be penetrated by a rotatable cutting knife.
Dependencies are inferred from the claim text.