Advancing material of indeterminate length – Selectively reversible material mover – By optional drive trains
Patent
1975-05-15
1976-11-30
Cherry, Johnny D.
Advancing material of indeterminate length
Selectively reversible material mover
By optional drive trains
192 33R, 192 71, 226 74, 226178, B65H 1738, B65H 7900
Patent
active
039944263
ABSTRACT:
A mechanism for driving a computer form web along a predetermined path includes a ratchet wheel having two sets of oppositely facing teeth, mounted on a support shaft for rotation. The wheel is driven in both clockwise and counter-clockwise directions. A drive gear in meshing engagement with a plurality of gears for driving the sprocket mechanism transporting the computer form web is also mounted on the support shaft for rotation. The gear is joined to a coupling plate also mounted on the support shaft for rotation thereon. The coupling plate includes first and second pawls which extend therefrom for cooperative engagement with the ratchet teeth sets, respectively. Pawl actuator arms also mounted on the coupling plate are movable to first and second positions and when in a first position engage the pawls to maintain the latter out of engagement with respective ratchet teeth sets. Pawl actuator arm engaging levers are mounted adjacent the pawl actuator arms and are movable to first and second positions. When in the first position the levers engage the pawl actuator arms to maintain them in the first position. Movement of the lever arms to the second position permits the pawls to be moved toward the ratchet wheel. Control of movement of the lever arms in turn controls the number of revolutions of the drive gear and thus the extent of movement of the computer web along its path. A manually operated gear selector for providing a change in gear ratios controls the length of movement of the computer web for each revolution of the drive gear. Continual rotation of the drive gear can be achieved by maintaining the lever arms in the second position.
REFERENCES:
patent: 2762477 (1956-09-01), Zenner
patent: 3016252 (1962-01-01), Mitchell
patent: 3275110 (1966-09-01), Lasky
patent: 3446554 (1969-05-01), Hichcock et al.
patent: 3684147 (1972-08-01), Ysbrand et al.
Pudark Arthur A.
Zahradnik George J.
A. B. Dick Company
Cherry Johnny D.
LaPorte Ronald J.
Lucyshyn Peter S.
Stoner Jr. Bruce H.
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