초록 ▼

A plurality of individual openings provided in a sheet strip material by a stamping device are passed in succession through a monitoring station positioned adjacent the outlet of the stamping device. As each individual opening is passed through the monitoring station, the monitoring station produces

A plurality of individual openings provided in a sheet strip material by a stamping device are passed in succession through a monitoring station positioned adjacent the outlet of the stamping device. As each individual opening is passed through the monitoring station, the monitoring station produces a plurality of voltage signals which identify the progress of each opening through the monitoring station and the progress of the sheet strip material through the stamping device. A controller is proivded having an input for receiving the plurality of voltage signals produced as each opening is passed through the monitoring station and an output connected to the stamping device. Within the controller, the plurality of voltage signals identifying the progress of an individual opening through the monitoring station are compared to the plurality of voltage signals identifying the progress of a following opening through the monitoring station. A deviation between the plurality of voltage signal sets identifies a sheet strip material misfeed condition within the stamping device. As soon as a sheet strip material misfeed condition is detected, the controller provides a signal to the stamping device to initiate stoppage of the stamping device.

대표청구항 ▼

Apparatus for detecting a sheet strip material misfeed condition in a stamping press having an intermittent feed comprising, stamping means having an intermittent feed of sheet strip material, said stamping means having an inlet portion and an outlet portion, said stamping means arranged to stamp a

Apparatus for detecting a sheet strip material misfeed condition in a stamping press having an intermittent feed comprising, stamping means having an intermittent feed of sheet strip material, said stamping means having an inlet portion and an outlet portion, said stamping means arranged to stamp a sheet strip material passing from said inlet portion to said outlet portion to provide a plurality of individual openings in said sheet strip material, monitoring means adjacent said stamping means outlet portion, means for passing said plurality of individual openings in said sheet strip through said monitoring means, said monitoring means producing a pattern of signals from a plurality of monitoring means signals as each said opening in said sheet strip is passed through said monitoring means, controller means having an input for receiving said plurality of monitoring means signals produced as each said opening in said sheet strip is passed through said monitoring means and an output connected to said stamping means, said controller means including means for comparing said pattern of signals from a plurality of monitoring means signals produced as one said opening in said sheet strip is passed through said monitoring means to another pattern of signals from a plurality of monitoring means signals producted as a following opening in said sheet strip is passed through said monitoring means, and said controller means providing a signal to said stamping means to initiate stoppage of said stamping means as soon as said pattern of signals from a plurality of monitoring means signals produced by an opening in said sheet strip is passed through said monitoring means deviates from said pattern of signals from a plurality of monitoring means signals produced as a prior opening in said sheet strip is passed through said monitoring means.