Apparatus and method for cutoff register control for diaper machines
AssigneePaper Converting Machine Company
InventorsGeorge H. Meissner, Bart C. Hardy, Timothy M. LeRoy
Life of this patent
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Abstract
Apparatus and method for cutoff register control for diaper machines wherein an advancing diaper web is sensed by strobe light imaging in connection with a point fixed in space to produce a distance value between the leading edge of the diaper pad and the fixed point, comparing the image distance with a predetermined value and then adjusting the means for cutoff and strobe trigger to bring the distance and picture within the value range.
Claims7
Apparatus for cutoff register control for diaper machines comprising a frame,
- means for advancing a continuous diaper web along a longitudinally extending path, said web being equipped with longitudinally spaced apart absorbent pads,
- strobe light means on said frame in said path, cutoff means on said frame downstream of said strobe light means for transversely severing said web between adjacent pads,
- strobe light signal means coupling said cutoff means to said strobe light means for actuating said strobe light means as a function of the operation of said cutoff means,
- camera means operably associated with said strobe light means to record an image of a diaper pad and a fixed point on said frame,
- means for comparing the distance between the edge of an imaged pad and said fixed point with a predetermined acceptance distance range, and
- means for changing the operation of said cutoff means whenever the recorded distance is outside said range to bring the distance in a following pad within said range.
In a method for controlling the cutoff in a diaper machine, the steps of:
- advancing a diaper web along a longitudinally extending path with said web being equipped with longitudinally spaced apart absorbent pads,
- transversely severing said web between pads at a predetermined position in said path,
- strobe light imaging the leading pad edge and a point fixed in space, said imaging occurring at an area upstream of said severing position,
- comparing the imaged distance between said pad edge and fixed point with a predetermined value range, and
- adjusting said severing means to bring said distance into said value range.
Dependencies are inferred from the claim text.