초록 ▼

A sensor system for determining the position of at least one edge of a web of material traveling along a predetermined path. The sensor system has a transmitter assembly capable of selectively transmitting at least one collimated light curtain and a receiver assembly capable of generating output sig

A sensor system for determining the position of at least one edge of a web of material traveling along a predetermined path. The sensor system has a transmitter assembly capable of selectively transmitting at least one collimated light curtain and a receiver assembly capable of generating output signals in response to receiving portions of the collimated light curtain transmitted by the transmitter assembly. The receiver assembly is spaced a distance from the transmitter assembly so as to define a travel path therebetween whereby at least a portion of the web of material traveling along a predetermined travel path blocks at least a portion of the collimated light curtain transmitted by the transmitter assembly. The output signal generated by the receiver assembly is indicative of the position of the web of material as the same is moved along the travel path between the transmitter assembly and the receiver assembly.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for guiding a continuous web of material traveling along a predetermined travel path, comprising:providing a transmitter assembly disposed substantially adjacent the travel path so that a collimated light curtain can be transmitted across at least a portion of

[ What is claimed is:] [1.]1. A method for guiding a continuous web of material traveling along a predetermined travel path, comprising:providing a transmitter assembly disposed substantially adjacent the travel path so that a collimated light curtain can be transmitted across at least a portion of the travel path;providing a receiver assembly generating output signals in response to receiving at least a portion of the collimated light curtain transmitted by the transmitter assembly, the receiver assembly spaced a distance from the transmitter assembly whereby the travel path passes in between the transmitter assembly and the receiver assembly and at least a portion of the continuous web of material traveling along the travel path blocks at least a portion of the collimated light curtain from reception by the receiver assembly such that the output signal generated by the receiver assembly indicates the position of the continuous web of material as same is moved along the travel path in between the transmitter assembly and the receiver assembly;activating the transmitter assembly so as to provide at least one collimated light curtain across the travel path;activating the receiver assembly;generating a logical sensor array extending across the receiver assembly;passing the continuous web of material in between the transmitter assembly and the receiver assembly along the predetermined travel path such that the continuous web of material blocks at least a portion of the collimated light curtain from reception by the receiver assembly thereby indicating the position of the continuous web of material therebetween; andgenerating, by the receiver assembly, output signals indicative of the position of at least one edge of the continuous web of material based on the logical sensor array; andcontrolling the lateral position of the continuous web of material to maintain the continuous web of material traveling along the predetermined travel path based on the signals output by the receiver assembly.