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Manually assemblable and disassemblable sheet-feed tractor emplo

Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain
Patent

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Manually assemblable sheet-feed tractor

Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain
Patent

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Mechanism for positioning tractors

Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain
Patent

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Method of automatically framing a reversal film provided with ed

Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Reciprocating or oscillating claw or finger
Patent

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Modular bidirectional tractor feed assembly

Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain
Patent

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Motion picture film advancement apparatus with vibration reducti

Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Rotating sprocket
Patent

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Multiposition tractor lid

Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain
Patent

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