Advancing material of indeterminate length – By orbitally traveling material-engaging surface – Including details of roll or mount
Patent
1985-03-28
1986-03-04
Gilreath, Stanley N.
Advancing material of indeterminate length
By orbitally traveling material-engaging surface
Including details of roll or mount
226 10, 226 45, 226174, 226196, 242 76, 360 70, 360 77, B65H 2700
Patent
active
045736197
ABSTRACT:
A tape guide mechanism includes an edge-guide element extending radially from a central axis. A tape guide roller, rotatable about the central axis, is arranged for urging an advancing magnetic tape laterally in the direction of the edge-guide element, to maintain an edge of the tape perpendicular to and in continuous contact with the edge-guide element during tape transport movement. A piezoelectric actuator, preferably comprising a stack of flexing type bimorph elements responsive to a voltage signal relating to the direction and magnitude of a tape-tracking error, causes movement of the edge-guide element in a single composite direction having a first component which is perpendicular to the edge of the tape, and a second component, which is parallel to the tape edge. Thus, the tape is caused to move laterally in either direction for tracking control, in one direction under the influence of perpendicular movement of the edge-guide element toward the tape, and in the opposite direction under the urging of the guide roller, to follow perpendicular movement of the edge-guide element away from the tape.
REFERENCES:
patent: 3114489 (1963-12-01), Legler
patent: 3643849 (1972-02-01), Roberts
patent: 3768717 (1973-10-01), Salcedo
patent: 4044388 (1977-08-01), Metzger
patent: 4120008 (1978-10-01), Metzger
patent: 4150773 (1979-04-01), Fell et al.
patent: 4184181 (1980-01-01), Mijatovic
patent: 4297931 (1981-11-01), Lessard
patent: 4403720 (1983-09-01), Grant
Eastman Kodak Company
Gilreath Stanley N.
Monteith Dennis P.
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