Method and apparatus for detecting a sheet strip material misfeed condition

A method for detecting the configuration of stampings in a strip material comprising the steps of,

• passing a strip material including a plurality of individual stampings in proximity to a sensing means,
• producing a sensing means signal as each said individual stamping is passed in proximity to said sensing means,
• providing said sensing means signal produced as each said individual stamping is passed in proximity to said sensing means to a controller means,
• sampling said sensing means signal within said controller means to produce an individual waveform from said sensing means signal for each said stamping,
• producing in said controller means a plurality of individual waveforms as said plurality of individual stampings are passed in proximity to said sensing means,
• selecting a desired individual waveform as a reference waveform,
• and
• comparing each said individual waveform to said reference waveform to determine the deviation between any said individual waveform and said reference waveform.

An apparatus for detecting non-uniform frames in a sheet strip material comprising,

• stamping means,
• said stamping means having an inlet portion and an outlet portion, said stamping means stamping a sheet strip material passing from said inlet portion to said outlet portion to provide a plurality of individual frames in said sheet strip material,
• sensing means adjacent said stamping means outlet portion,
• means for passing said plurality of individual frames in proximity to said sensing means,
• said sensing means producing a sensing means signal as each said individual frame is passed in proximity to said sensing means,
• controller means having an input for receiving said sensing means signal produced as each said individual frame is passed in proximity to said sensing means and an output connected to said stamping means,
• said controller means including means for sampling said sensing means signal to produce an individual waveform for each said frame, said controller means producing a plurality of individual waveforms as said plurality of individual frames are passed in proximity to said sensing means,
• said controller means including means for selecting a desired individual waveform as a reference waveform and comparing each said individual waveform to said reference waveform to determine a deviation between any said individual waveform and said reference waveform, and
• said controller means providing an output signal to said stamping means to initiate stoppage of said stamping means as soon as any said individual waveform deviates from said reference waveform by a preselected amount.

A method for detecting non-uniform frames in a sheet strip material comprising the steps of,

• passing a sheet strip material through a stamping means to stamp in said sheet strip material a plurality of individual frames,
• passing said plurality of individual frames in proximity to a sensing means,
• producing a sensing means signal as each said individual frame is passed in proximity to said sensing means,
• providing said sensing means signal produced as each said frame is passed in proximity to said sensing means to a controller means,
• sampling said sensing means signal within said controller means to produce an individual waveform from said sensing means signal for each said frame, said sampling resulting in said waveform being formed from a plurality of distinct points,
• producing a pluraltiy of individual waveforms as said plurality of individual frames are passed in proximity to said sensing means,
• selecting a desired individual waveform as a reference waveform,
• comparing each said individual waveform to said referecne waveform to determine a deviation between say said individual waveform and said reference waveform, and
• providing a signal to said stamping means to initiate stoppage of said stamping means as soon as said deviation between any said individual waveform and said reference waveform exceeds a preselected amount.

An apparatus for detecting a sheet strip material misfeed condition in a stamping device comprising,

• stamping means,
• said stamping means having an inlet portion and an outlet portion, said stamping means stamping a sheet strip material passing from said inlet portion to said outlet portion to provide plurality of individual frames in said sheet strip material,
• sensing means adjacent said stamping means outlet portion,
• means for passing said plurality of individual frames in proximity to said sensing means,
• said sensing means producing a sensing means signal as each said individual frame is passed in proximity to said sensing means,
• controller means having an input for receiving said sensing means signal produced as each said individual frame is passed in proximity to said sensing means and an output connected to said stamping means,
• said controller means including means for sampling said sensing means signal to produce an individual waveform for each said frame, said controller means producing a plurality of individual waveforms as said plurality of individual frames are passed in proximity to said sensing means,
• said controller means comaring an individual waveform to a following waveform to detect a deviation between said waveforms, said deviation identifying a sheet strip material misfeed condition, and
• said controller means providing a signal to said stamping means to initiate stoppage of said stamping means as soon as said deviation identifying said sheet strip material misfeed condition is detected.

A method for detecting a sheet strip material misfeed condition in a stamping device comprising the steps of,

• providing a stamping means having an inlet portion and an outlet portion, said stamping means stamping a sheet strip material passing from said inlet portion to said outlet portion to provide a plurality of individual frames in said sheet strip material,
• passing said plurality of individual frames in proximity to a sensing means to produce a sensing means signal for each said individual frame,
• providing said sensing means signal produced as each said frame is passed in proximity to said sensing means to a controller means,
• sampling each of said sensing means signals in said controller means to produce a plurality of individual waveforms as said plurality of individual frames are passed in proximity to said sensing means,
• comparing an individual waveform to a following waveform to detect a deviation between said waveforms, said deviation identifying a sheet strip material misfeed condition, and
• providing a signal from said controller means to said stamping means to initiate stoppage of said stamping means as soon as said deviation identifying said sheet strip material misfeed condition is detected.