Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain
Patent
1991-09-17
1993-01-26
Stodola, Daniel P.
Advancing material of indeterminate length
Means to engage longitudinally spaced modifications in material
Pins on flexible belt or chain
4006161, B65H 2020
Patent
active
051816415
ABSTRACT:
A tractor feed mechanism combines, in a unitary assembly, components which provide the capabilities of separate, independent, left and right-hand tractors and their support and drive shafts. The assembly has fewer parts than a tractor feed using separate tractors thereby reducing the cost and increasing the reliability of the feed mechanism. In the unitary tractor feed, endless tractor belts are positioned by lid belt guide members which are slidable on a bar having a surface which provides a platform which sets the height of the belts, while the web is disposed on a gap between an upwardly facing surface of the guide members and a downwardly facing surface of the lid. The bar and a sprocket which engages the belt extends laterally (width-wise) of the web a distance at least as wide as the longest web to be fed. The guide members contain flexural fingers providing detents which are cammed into locking engagement against the bar when the lid is closed; allowing, when the lid is opened, the detent to spring away from the bar so that the guide members can be moved to align the belts guided therein with the perforations in the web.
REFERENCES:
patent: 3693856 (1972-09-01), Funk
patent: 3825162 (1974-07-01), Hubbard
patent: 3958735 (1976-05-01), Wanat
patent: 3982677 (1976-09-01), Letz
patent: 4129239 (1978-12-01), Hubbard
patent: 4160606 (1979-07-01), Caenazzo
patent: 4206859 (1980-06-01), Plaza
patent: 4316567 (1982-02-01), Grear et al.
patent: 4345708 (1982-08-01), Hubbard
patent: 5022578 (1991-06-01), Ohsaki
Bowen Paul T.
Stodola Daniel P.
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