Disc chart paper with reinforced separating edge
OwnerRobert H. Welkerinventor
Life of this patent
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Abstract
For use in recording data on chart paper mounted on a timer driven and operated, rotatable clock mechanism, improved chart paper is disclosed which incorporates a disk of paper having a writing surface thereon adapted to receive markings indicative of a measurement dependent on time, the disk incorporating a central opening. The disk further includes a pair of opposing, facing shoulders separated by a cut in the disk which shoulders include reinforcing means to thereby enable a rotating cutter to separate a single disk from adjacent stacked duplicate disks. The shoulder reinforcing means has alternate forms including a plastic wrap adjacent to both faces and the edge of one shoulder and another form comprising a tongue affixed to one shoulder and lapped beyond the opposing shoulder.
Claims10
In a demountable individual chart having a central opening adapted to fit about a mounting shaft and further including a cooperative alignment opening adapted to fit about an alignment means which chart is for use on a chart drive mechanism and further wherein said chart is azimuthally registered to a selected location by said central and alignment openings and wherein said chart is adapted to be stacked adjacent to a stack of similar charts on said chart drive mechanism and said chart drive mechanism incorporates a rotatable hub having a cutting edge thereon and said cutting edge, on rotation, separates the demountable chart from adjacent similar charts, the improvement which comprises a reinforced shoulder means on said chart which shoulder means is located to engage said cutting edge on said rotatable hub and which shoulder means further enables said cutting edge to rotate relative to said rotatable hub.
Dependencies are inferred from the claim text.