4. Advancing material of indeterminate length
  5. Means to engage longitudinally spaced modifications in material
  6. Rotating sprocket

Dennis R. Hedrick

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Ink ribbon cartridge indication system for printer

Typewriting machines – Including interposed inking device for record-medium – Including mechanism for shifting ribbon laterally at...
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Ribbon feed with ink depletion compensation

Typewriting machines – Including interposed inking device for record-medium – Ribbon-feeding mechanism
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Web feeding mechanism

Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Rotating sprocket
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Profile ID: LFUS-PAI-P-593701

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