4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Photocell controls its own optical systems

Jeffrey Isherwood

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Detecting lateral position of webs

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent

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Printed web registration control apparatus

Printing – Multicolor – Rotary machines
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Register mark detection

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
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Web feeding machines

Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
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Profile ID: LFUS-PAI-P-682877

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